"use client";

/**
 * Admin domain P5 扩展 Hook（ARCHITECTURE.md §9.4 B5 + admin-NeedTodo §四）
 *
 * 覆盖：
 * - users/import、roles detail + CRUD、permissions role counts
 * - audit-logs（overview / login-logs / data-changes / module-options / stats）
 * - school（schools CRUD / departments / academic-year / grades / admin-classes / teacher/staff options）
 * - announcements（list / detail / CRUD / archive / pin）
 * - files（list / stats）
 * - ai-settings（providers CRUD / usage dashboard）
 * - system settings、viewports
 * - students / teachers / organization（ARCH 新建）
 * - §四补充批次（course-plans / curriculum-map / elective / questions / lesson-plans / error-book / scheduling / attendance）
 *
 * 契约状态：除 pluginRegistry/config-service 外均 ❌ schema 未就绪 → MSW 兜底（@contract-pending）
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.3 / §11.4
 */
import { useWidgetQuery } from "@/lib/useWidgetQuery";
import { useWidgetMutation } from "@/lib/useWidgetMutation";
import { ApiError } from "./errors";
import type { PaginatedResult, Pagination, UseQueryResult } from "./types";
import type { AuditLogFilter, Role, SchoolInput } from "./admin";
import {
  IMPORT_USERS_DOC,
  GET_ROLE_DOC,
  CREATE_ROLE_DOC,
  UPDATE_ROLE_DOC,
  DELETE_ROLE_DOC,
  TOGGLE_ROLE_ENABLED_DOC,
  GET_PERMISSION_ROLE_COUNTS_DOC,
  GET_ROLE_PERMISSIONS_DOC,
  UPDATE_ROLE_PERMISSION_ACTIONS_DOC,
  GET_AUDIT_OVERVIEW_STATS_DOC,
  GET_AUDIT_TREND_DOC,
  GET_DATA_CHANGE_ACTION_STATS_DOC,
  GET_LOGIN_LOGS_DOC,
  GET_DATA_CHANGE_LOGS_DOC,
  GET_DATA_CHANGE_TABLE_OPTIONS_DOC,
  GET_DATA_CHANGE_STATS_DOC,
  GET_AUDIT_MODULE_OPTIONS_DOC,
  EXPORT_AUDIT_LOGS_DOC,
  EXPORT_LOGIN_LOGS_DOC,
  EXPORT_DATA_CHANGES_DOC,
  GET_SCHOOLS_DOC,
  CREATE_SCHOOL_DOC,
  ADMIN_UPDATE_SCHOOL_DOC,
  DELETE_SCHOOL_DOC,
  GET_DEPARTMENTS_DOC,
  CREATE_DEPARTMENT_DOC,
  UPDATE_DEPARTMENT_DOC,
  DELETE_DEPARTMENT_DOC,
  GET_ACADEMIC_YEARS_DOC,
  CREATE_ACADEMIC_YEAR_DOC,
  UPDATE_ACADEMIC_YEAR_DOC,
  DELETE_ACADEMIC_YEAR_DOC,
  GET_GRADES_DOC,
  GET_GRADE_OVERVIEW_STATS_DOC,
  ADMIN_CREATE_GRADE_DOC,
  UPDATE_GRADE_DOC,
  DELETE_GRADE_DOC,
  GET_ADMIN_CLASSES_DOC,
  CREATE_ADMIN_CLASS_DOC,
  UPDATE_ADMIN_CLASS_DOC,
  DELETE_ADMIN_CLASS_DOC,
  GET_TEACHER_OPTIONS_DOC,
  GET_STAFF_OPTIONS_DOC,
  GET_ADMIN_ANNOUNCEMENTS_DOC,
  GET_ADMIN_ANNOUNCEMENT_DETAIL_DOC,
  CREATE_ANNOUNCEMENT_DOC,
  UPDATE_ANNOUNCEMENT_DOC,
  DELETE_ANNOUNCEMENT_DOC,
  ARCHIVE_ANNOUNCEMENT_DOC,
  PIN_ANNOUNCEMENT_DOC,
  PUBLISH_ANNOUNCEMENT_DOC,
  GET_FILE_ATTACHMENTS_DOC,
  GET_FILE_STATS_DOC,
  UPLOAD_FILE_DOC,
  BATCH_DELETE_FILES_DOC,
  GET_AI_PROVIDERS_DOC,
  CREATE_AI_PROVIDER_DOC,
  UPDATE_AI_PROVIDER_DOC,
  DELETE_AI_PROVIDER_DOC,
  TEST_AI_PROVIDER_DOC,
  GET_AI_USAGE_DASHBOARD_DOC,
  GET_SYSTEM_SETTINGS_DOC,
  UPDATE_SYSTEM_SETTINGS_DOC,
  GET_VIEWPORTS_DOC,
  UPDATE_VIEWPORT_DOC,
  GET_ADMIN_STUDENTS_DOC,
  GET_ADMIN_TEACHERS_DOC,
  GET_ORGANIZATION_TREE_DOC,
  GET_ADMIN_COURSE_PLANS_DOC,
  GET_ADMIN_COURSE_PLAN_DOC,
  GET_STANDARDS_COVERAGE_HEATMAP_DOC,
  GET_GLOBAL_LESSON_PLAN_STATS_DOC,
  GET_ADMIN_ELECTIVES_DOC,
  GET_ADMIN_ELECTIVE_DOC,
  GET_ADMIN_QUESTIONS_DOC,
  GET_ADMIN_QUESTION_DOC,
  GET_ADMIN_LESSON_PLANS_DOC,
  GET_ADMIN_LESSON_PLAN_DOC,
  GET_ADMIN_ERROR_BOOK_STATS_DOC,
  EXPORT_ERROR_BOOK_CSV_DOC,
  GET_ADMIN_SCHEDULE_CHANGES_DOC,
  GET_ADMIN_SCHEDULE_ENTRIES_DOC,
  ADMIN_GET_SCHEDULING_RULES_DOC,
  UPDATE_SCHEDULING_RULES_DOC,
  APPROVE_SCHEDULE_CHANGE_DOC,
  REJECT_SCHEDULE_CHANGE_DOC,
  AUTO_SCHEDULE_DOC,
  GET_ADMIN_ATTENDANCE_STATS_DOC,
  GET_ADMIN_ATTENDANCE_RECORDS_DOC,
  GET_ATTENDANCE_GRADE_CORRELATION_DOC,
  GET_AUDIT_RETENTION_CONFIG_DOC,
  SAVE_AUDIT_RETENTION_CONFIG_DOC,
  PURGE_EXPIRED_AUDIT_LOGS_DOC,
  CREATE_COURSE_PLAN_ITEM_DOC,
  UPDATE_COURSE_PLAN_ITEM_DOC,
  DELETE_COURSE_PLAN_ITEM_DOC,
  TOGGLE_COURSE_PLAN_ITEM_COMPLETED_DOC,
  REORDER_COURSE_PLAN_ITEMS_DOC,
  DELETE_COURSE_PLAN_DOC,
  BULK_TOGGLE_COURSE_PLAN_ITEMS_DOC,
  DELETE_ELECTIVE_DOC,
  OPEN_ELECTIVE_SELECTION_DOC,
  CLOSE_ELECTIVE_SELECTION_DOC,
  RUN_ELECTIVE_LOTTERY_DOC,
  GET_ELECTIVE_OVERVIEW_STATS_DOC,
} from "./operations/admin.graphql";
import {
  CREATE_ELECTIVE_DOC,
  UPDATE_ELECTIVE_DOC,
} from "./operations/elective.graphql";

import { SOFT_DELETE_LESSON_PLAN_DOC } from "./operations/lesson-plans.graphql";

// ============================================================
// Types: Users import
// ============================================================
export interface ImportResult {
  total: number;
  success: number;
  failed: number;
  errors: string[];
}

// ============================================================
// Types: RBAC role detail + CRUD
// ============================================================
export interface RoleDetail extends Role {
  description: string;
  isLocked: boolean;
}

export interface RoleInput {
  name: string;
  description?: string;
  permissionIds: string[];
  /**
   * 角色值（如 `role:teacher`，@contract-pending：schema 未就绪，MSW 兜底）。
   * 缺省视为未知，UI 用 `-` 占位。
   */
  value?: string;
}

// ============================================================
// Types: RBAC role permission matrix (CRUD actions per permission point)
// ============================================================
export interface PermissionActions {
  read: boolean;
  create: boolean;
  update: boolean;
  delete: boolean;
}

/**
 * 权限矩阵中的一个权限点条目（按模块分组，每行一个权限点，列为 CRUD 动作）。
 *
 * 命名说明：admin.ts 已定义 RolePermission（id/name/resource/action，
 * 用于 Role.permissions 列表）。本类型为矩阵视图的独立结构，故显式命名为
 * RolePermissionMatrixItem 以避免 barrel 导出冲突。
 */
export interface RolePermissionMatrixItem {
  permissionId: string;
  label: string;
  module: string;
  actions: PermissionActions;
}

// Input for UpdateRolePermissionActions mutation (one entry per permission point)
export interface PermissionActionUpdate {
  permissionId: string;
  actions: PermissionActions;
}

// Role/RolePermission/Permission 类型由 ./admin.ts 提供（barrel 统一导出）

export interface PermissionRoleCount {
  permissionId: string;
  permissionName: string;
  resource: string;
  action: string;
  roleCount: number;
}

// ============================================================
// Types: Audit logs
// ============================================================
export interface AuditOverviewStats {
  totalLogs: number;
  totalToday: number;
  totalErrors: number;
  totalUsers: number;
  /** @contract-pending 今日审计事件数（与 totalToday 含义区分，强调事件维度） */
  auditEventsToday: number;
  /** @contract-pending 今日失败登录次数（用于失败登录卡片高亮） */
  failedLoginsToday: number;
  /** @contract-pending 今日数据变更次数 */
  dataChangesToday: number;
}

export interface AuditTrendPoint {
  date: string;
  count: number;
}

export interface DataChangeActionStat {
  action: string;
  count: number;
}

export interface LoginLog {
  id: string;
  userId: string;
  userName: string;
  action: string;
  status: string;
  ip: string;
  userAgent: string;
  timestamp: string;
  /** @contract-pending 失败原因（仅 status=failure/error 时有值），MSW 兜底 */
  errorMessage?: string | null;
}

export interface LoginLogFilter {
  action?: string | null;
  status?: string | null;
  userId?: string | null;
  startDate?: string | null;
  endDate?: string | null;
}

export interface DataChangeLog {
  id: string;
  tableName: string;
  recordId: string;
  action: string;
  userId: string;
  userName: string;
  changes: string;
  timestamp: string;
  /** @contract-pending 变更前快照（JSON 字符串或对象），MSW 兜底，用于行内展开对比 */
  oldValue?: string | null;
  /** @contract-pending 变更后快照（JSON 字符串或对象），MSW 兜底，用于行内展开对比 */
  newValue?: string | null;
}

export interface DataChangeLogFilter {
  tableName?: string | null;
  action?: string | null;
  userId?: string | null;
  startDate?: string | null;
  endDate?: string | null;
}

export interface DataChangeStat {
  action: string;
  count: number;
  lastChangeAt: string;
}

/**
 * 导出结果（CSV 字符串由 MSW 用 transformations 纯函数构造）。
 * @contract-pending schema 未就绪，MSW 兜底返回 csv 字符串。
 */
export interface ExportResult {
  success: boolean;
  count: number;
  filename: string;
  csv: string;
}

// ============================================================
// Types: School CRUD
// ============================================================
export interface SchoolListItem {
  id: string;
  name: string;
  address: string;
  phone: string;
  email: string;
  currentAcademicYear: string;
  currentTerm: string;
  /** 学校编码（@contract-pending，MSW 兜底） */
  code?: string;
  /** 更新时间 ISO 字符串（@contract-pending，MSW 兜底） */
  updatedAt?: string;
}

export interface Department {
  id: string;
  name: string;
  schoolId: string;
  headId: string;
  headName: string;
  memberCount: number;
  /** 部门描述（@contract-pending，MSW 兜底） */
  description?: string;
  /** 更新时间 ISO 字符串（@contract-pending，MSW 兜底） */
  updatedAt?: string;
}

export interface DepartmentInput {
  name: string;
  schoolId: string;
  headId?: string;
  description?: string;
}

export interface AcademicYear {
  id: string;
  name: string;
  schoolId: string;
  startDate: string;
  endDate: string;
  isActive: boolean;
}

export interface AcademicYearInput {
  name: string;
  schoolId: string;
  startDate: string;
  endDate: string;
  isActive?: boolean;
}

export interface AdminGradeListItem {
  id: string;
  name: string;
  schoolId: string;
  schoolName: string;
  headStaffId: string;
  headStaffName: string;
  classCount: number;
  studentCount: number;
  /** 年级序号（@contract-pending，MSW 兜底） */
  order?: number;
  /** 教学主任 ID（@contract-pending，MSW 兜底） */
  teachingHead?: string;
  /** 教学主任姓名（@contract-pending，MSW 兜底） */
  teachingHeadName?: string;
  /** 更新时间 ISO 字符串（@contract-pending，MSW 兜底） */
  updatedAt?: string;
}

export interface GradeInput {
  name: string;
  schoolId: string;
  headStaffId?: string;
}

export interface GradeOverviewStat {
  gradeId: string;
  gradeName: string;
  classCount: number;
  studentCount: number;
  avgScore: number;
}

export interface AdminClassListItem {
  id: string;
  name: string;
  gradeId: string;
  gradeName: string;
  schoolId: string;
  schoolName: string;
  headTeacherId: string;
  headTeacherName: string;
  studentCount: number;
  subjectCount: number;
  /** 班号（@contract-pending，MSW 兜底） */
  homeroomLabel?: string;
  /** 教室（@contract-pending，MSW 兜底） */
  room?: string;
  /** 班主任 ID（@contract-pending，MSW 兜底） */
  homeroom?: string;
  /** 班主任姓名（@contract-pending，MSW 兜底） */
  homeroomName?: string;
  /** 任课教师列表（@contract-pending，MSW 兜底） */
  subjectTeachers?: string;
  /** 更新时间 ISO 字符串（@contract-pending，MSW 兜底） */
  updatedAt?: string;
}

/** 班级 CRUD 输入类型（@contract-pending，MSW 兜底） */
export interface AdminClassInput {
  name: string;
  gradeId: string;
  schoolId: string;
  headTeacherId?: string;
  homeroomLabel?: string;
  room?: string;
  homeroom?: string;
}

export interface OptionItem {
  id: string;
  name: string;
}

// ============================================================
// Types: Announcements
// ============================================================
export interface AnnouncementListItem {
  id: string;
  title: string;
  content: string;
  status: string;
  audience: string;
  pinnedAt: string | null;
  publishedAt: string | null;
  createdAt: string;
  updatedAt: string;
  authorName: string;
  readCount: number;
}

export interface AnnouncementDetail extends AnnouncementListItem {
  grades: string[];
  classes: string[];
}

export interface AnnouncementInput {
  title: string;
  content: string;
  status: string;
  audience: string;
  grades?: string[];
  classes?: string[];
}

// ============================================================
// Types: Files
// ============================================================
export interface FileAttachment {
  id: string;
  name: string;
  size: number;
  mimeType: string;
  url: string;
  uploadedBy: string;
  uploadedAt: string;
}

export interface FileFilter {
  limit?: number;
  mimeType?: string;
}

export interface FileStats {
  totalFiles: number;
  totalSize: number;
  byType: Record<string, number>;
}

export interface UploadFileInput {
  filename: string;
  mimeType: string;
  size: number;
}

export interface UploadFileResult {
  id: string;
  url: string;
  filename: string;
}

export interface BatchDeleteFilesResult {
  success: boolean;
  deletedCount: number;
}

// ============================================================
// Types: AI settings
// ============================================================
export interface AiProvider {
  id: string;
  name: string;
  type: string;
  scope: string;
  ownerId: string;
  isActive: boolean;
  isDefault: boolean;
  visibility: string;
  model: string;
  apiBase: string;
  config: Record<string, unknown>;
  createdAt: string;
}

export interface AiProviderInput {
  name: string;
  type: string;
  scope: string;
  model: string;
  apiBase?: string;
  isActive?: boolean;
  isDefault?: boolean;
  visibility?: string;
  config?: Record<string, unknown>;
}

export interface AiUsageDashboard {
  totalRequests: number;
  totalTokens: number;
  totalCostCents: number;
  byProvider: Array<{
    providerId: string;
    providerName: string;
    requests: number;
    tokens: number;
    costCents: number;
  }>;
  byDay: Array<{ date: string; requests: number; tokens: number }>;
}

// ============================================================
// Types: System settings
// ============================================================
export interface SystemSetting {
  key: string;
  value: string;
  description: string;
  updatedAt: string;
}

export interface SystemSettingInput {
  key: string;
  value: string;
}

// ============================================================
// Types: Viewports
// ============================================================
export interface ViewportPlugin {
  pluginId: string;
  slot: string;
  sortOrder: number;
  isEnabled: boolean;
}

export interface Viewport {
  id: string;
  name: string;
  role: string;
  layoutId: string;
  plugins: ViewportPlugin[];
  isDefault: boolean;
}

export interface ViewportInput {
  name: string;
  layoutId: string;
  plugins: ViewportPlugin[];
}

// ============================================================
// Types: Students / Teachers / Organization
// ============================================================
export interface AdminStudent {
  id: string;
  name: string;
  studentNo: string;
  gradeId: string;
  gradeName: string;
  classId: string;
  className: string;
  status: string;
  enrolledAt: string;
}

export interface StudentFilter {
  gradeId?: string | null;
  classId?: string | null;
  status?: string | null;
  q?: string | null;
}

export interface AdminTeacher {
  id: string;
  name: string;
  email: string;
  staffNo: string;
  department: string;
  title: string;
  classCount: number;
  subjectCount: number;
  status: string;
}

export interface TeacherFilter {
  department?: string | null;
  q?: string | null;
  status?: string | null;
}

export interface OrgNode {
  id: string;
  name: string;
  type: string;
  parentId: string | null;
  memberCount: number;
  children: OrgNode[];
}

// ============================================================
// Types: §四补充批次
// ============================================================
export interface AdminCoursePlanListItem {
  id: string;
  name: string;
  classId: string;
  className: string;
  subjectId: string;
  subjectName: string;
  teacherId: string;
  teacherName: string;
  academicYearId: string;
  academicYearName: string;
  status: string;
  createdAt: string;
  /** 学期（@contract-pending，MSW 兜底，对齐 CICD 列表"学期"列） */
  semester?: string;
  /** 总课时（@contract-pending，MSW 兜底，用于进度条 totalHours） */
  totalHours?: number;
  /** 已完成课时（@contract-pending，MSW 兜底，用于进度条 completedHours） */
  completedHours?: number;
  /** 更新时间 ISO 字符串（@contract-pending，MSW 兜底） */
  updatedAt?: string;
}

/** 管理端课程计划周计划项（@contract-pending，MSW 兜底） */
export interface AdminCoursePlanItem {
  id: string;
  planId: string;
  week: number;
  topic: string;
  content: string | null;
  hours: number;
  textbookChapter: string | null;
  notes: string | null;
  isCompleted: boolean;
  completedAt: string | null;
  createdAt: string;
  updatedAt: string;
}

export interface AdminCoursePlan extends AdminCoursePlanListItem {
  content: string;
  items: AdminCoursePlanItem[];
  updatedAt: string;
  /** 教学大纲（@contract-pending，MSW 兜底，对齐 CICD 详情"教学大纲"区） */
  syllabus?: string;
  /** 教学目标（@contract-pending，MSW 兜底，对齐 CICD 详情"教学目标"区） */
  objectives?: string;
  /** 周课时（@contract-pending，MSW 兜底） */
  weeklyHours?: number;
  /** 计划开始日期（@contract-pending，MSW 兜底） */
  startDate?: string;
  /** 计划结束日期（@contract-pending，MSW 兜底） */
  endDate?: string;
  /** 教材链接（@contract-pending，MSW 兜底） */
  textbooksHref?: string;
  /** 作业链接（@contract-pending，MSW 兜底） */
  homeworkHref?: string;
}

/** 创建/更新周计划项的输入类型（@contract-pending） */
export interface AdminCoursePlanItemInput {
  planId: string;
  week: number;
  topic: string;
  content?: string | null;
  hours?: number;
  textbookChapter?: string | null;
  notes?: string | null;
  completedAt?: string | null;
}

/** 更新周计划项的输入类型（不含 planId，@contract-pending） */
export interface AdminCoursePlanItemUpdateInput {
  week?: number;
  topic?: string;
  content?: string | null;
  hours?: number;
  textbookChapter?: string | null;
  notes?: string | null;
  completedAt?: string | null;
}

/** 重排序周计划项的输入条目（@contract-pending） */
export interface ReorderCoursePlanItemInput {
  id: string;
  week: number;
}

export interface StandardsCoverageCell {
  standardId: string;
  standardName: string;
  gradeId: string;
  gradeName: string;
  coverageRate: number;
  lessonPlanCount: number;
  /**
   * 该标准 × 年级下已关联教案的课时数（@contract-pending，MSW 兜底）。
   * 与 lessonPlanCount 区分：lessonPlanCount 为教案条目数，total 为应覆盖总课时数。
   */
  total: number;
  /** 已关联教案数别名（与 lessonPlanCount 同义，对齐 CICD linked/total 口径） */
  linked?: number;
}

export interface GlobalLessonPlanStats {
  totalTeachers: number;
  totalLessonPlans: number;
  publishedCount: number;
  submittedCount: number;
  standardsLinked: number;
}

export interface AdminElectiveListItem {
  id: string;
  name: string;
  subjectId: string;
  subjectName: string;
  gradeId: string;
  gradeName: string;
  teacherId: string;
  teacherName: string;
  capacity: number;
  selectedCount: number;
  status: string;
  /** 教室（@contract-pending，MSW 兜底，对齐 CICD 列表"教室"列） */
  classroom?: string;
  /** 上课时间（@contract-pending，MSW 兜底，对齐 CICD 列表"时间"列） */
  schedule?: string;
  /** 学分（@contract-pending，MSW 兜底，对齐 CICD 列表"学分"列） */
  credit?: number;
  /** 选课模式（@contract-pending，MSW 兜底：FIRST_COME | LOTTERY） */
  selectionMode?: string;
  /** 选课开始时间 ISO（@contract-pending，MSW 兜底） */
  selectionStartAt?: string;
  /** 选课结束时间 ISO（@contract-pending，MSW 兜底） */
  selectionEndAt?: string;
  /** 退课截止时间 ISO（@contract-pending，MSW 兜底） */
  dropDeadline?: string;
  /** 描述（@contract-pending，MSW 兜底，列表展示用 line-clamp） */
  description?: string;
  /** 开始日期（@contract-pending，MSW 兜底） */
  startDate?: string;
  /** 结束日期（@contract-pending，MSW 兜底） */
  endDate?: string;
  /** 创建时间 ISO（@contract-pending，MSW 兜底） */
  createdAt?: string;
  /** 更新时间 ISO（@contract-pending，MSW 兜底） */
  updatedAt?: string;
}

export interface AdminElective extends AdminElectiveListItem {
  description: string;
  selections: Array<{
    studentId: string;
    studentName: string;
    selectedAt: string;
    /** 选课状态（@contract-pending，MSW 兜底：confirmed | pending | cancelled） */
    status?: string;
    /** 优先级（@contract-pending，MSW 兜底，对齐 CICD 详情"优先级"列） */
    priority?: number;
    /** 选课时间别名（@contract-pending，MSW 兜底，与 selectedAt 同义） */
    enrolledAt?: string;
  }>;
}

/** 创建课程计划输入（@contract-pending，MSW 兜底，扩展 course-plans.ts 的基础输入） */
export interface AdminCreateCoursePlanInput {
  name: string;
  gradeId: string;
  classId?: string;
  subjectId: string;
  teacherId?: string;
  academicYearId?: string;
  semester?: string;
  description?: string;
  objectives?: string;
  syllabus?: string;
  totalHours?: number;
  weeklyHours?: number;
  startDate?: string;
  endDate?: string;
  status?: string;
}

/** 更新课程计划输入（@contract-pending，MSW 兜底） */
export interface AdminUpdateCoursePlanInput {
  id: string;
  name?: string;
  gradeId?: string;
  classId?: string;
  subjectId?: string;
  teacherId?: string;
  academicYearId?: string;
  semester?: string;
  description?: string;
  objectives?: string;
  syllabus?: string;
  totalHours?: number;
  weeklyHours?: number;
  startDate?: string;
  endDate?: string;
  status?: string;
}

/** 创建选修课输入（@contract-pending，MSW 兜底，扩展 elective.ts 的基础输入） */
export interface AdminCreateElectiveInput {
  name: string;
  description?: string;
  subjectId: string;
  gradeId: string;
  teacherId?: string;
  capacity: number;
  credit?: number;
  classroom?: string;
  schedule?: string;
  selectionMode?: string;
  startDate?: string;
  endDate?: string;
  selectionStartAt?: string;
  selectionEndAt?: string;
  dropDeadline?: string;
  status?: string;
}

/** 更新选修课输入（@contract-pending，MSW 兜底） */
export interface AdminUpdateElectiveInput {
  id: string;
  name?: string;
  description?: string;
  subjectId?: string;
  gradeId?: string;
  teacherId?: string;
  capacity?: number;
  credit?: number;
  classroom?: string;
  schedule?: string;
  selectionMode?: string;
  startDate?: string;
  endDate?: string;
  selectionStartAt?: string;
  selectionEndAt?: string;
  dropDeadline?: string;
  status?: string;
}

/** 选修课总览统计（@contract-pending，MSW 兜底） */
export interface ElectiveOverviewStats {
  totalCourses: number;
  totalCapacity: number;
  totalEnrolled: number;
  totalDraft: number;
  totalOpen: number;
}

export interface AdminQuestionListItem {
  id: string;
  type: string;
  content: string;
  difficulty: string;
  subjectId: string;
  subjectName: string;
  textbookId: string;
  status: string;
  createdAt: string;
  createdBy: string;
}

/**
 * 题目详情（管理域视角，@contract-pending，MSW 兜底）。
 *
 * 与 AdminQuestionListItem 的差异：包含 answer / explanation / knowledgePointId /
 * knowledgePointTitle / updatedAt 等详情字段，供详情对话框展示。
 */
export interface AdminQuestionDetail {
  id: string;
  type: string;
  content: string;
  difficulty: string;
  subjectId: string;
  subjectName: string;
  textbookId: string;
  textbookTitle: string;
  knowledgePointId: string;
  knowledgePointTitle: string;
  status: string;
  answer: string;
  explanation: string | null;
  source: string | null;
  createdAt: string;
  updatedAt: string;
  createdBy: string;
}

export interface QuestionFilter {
  type?: string | null;
  difficulty?: string | null;
  subjectId?: string | null;
  q?: string | null;
}

export interface AdminLessonPlanListItem {
  id: string;
  title: string;
  subjectId: string;
  subjectName: string;
  teacherId: string;
  teacherName: string;
  classId: string;
  className: string;
  status: string;
  createdAt: string;
  updatedAt: string;
}

export interface AdminLessonPlan extends AdminLessonPlanListItem {
  textbookId: string;
  textbookTitle: string;
  chapterId: string;
  chapterTitle: string;
  content: string;
}

export interface AdminErrorBookStats {
  totalStudents: number;
  totalErrorQuestions: number;
  totalErrorCount: number;
  avgErrorRate: number;
  bySubject: Array<{
    subjectId: string;
    subjectName: string;
    errorCount: number;
    questionCount: number;
    errorRate: number;
  }>;
  /**
   * 按班级分组的错题统计（@contract-pending，MSW 兜底）。
   * 用于"按班级分组"卡片展示，与 bySubject 互补。
   */
  byClass: Array<{
    classId: string;
    className: string;
    errorCount: number;
    questionCount: number;
    errorRate: number;
  }>;
  topStudents: Array<{
    studentId: string;
    studentName: string;
    className: string;
    errorCount: number;
    errorRate: number;
  }>;
  topWrongQuestions: Array<{
    questionId: string;
    content: string;
    errorCount: number;
    errorRate: number;
  }>;
}

export interface ScheduleChange {
  id: string;
  classId: string;
  className: string;
  teacherId: string;
  teacherName: string;
  originalSlot: string;
  requestedSlot: string;
  reason: string;
  status: string;
  submittedAt: string;
}

export interface ScheduleEntry {
  classId: string;
  className: string;
  entries: Array<{
    slot: string;
    subjectId: string;
    subjectName: string;
    teacherId: string;
    teacherName: string;
  }>;
}

export interface AdminSchedulingRule {
  id: string;
  name: string;
  type: string;
  priority: number;
  isEnabled: boolean;
  config: Record<string, unknown>;
}

export interface AdminAttendanceStats {
  totalRecords: number;
  presentRate: number;
  absentRate: number;
  lateRate: number;
  earlyLeaveRate: number;
  byClass: Array<{
    classId: string;
    className: string;
    presentRate: number;
    absentRate: number;
  }>;
}

export interface AdminAttendanceRecord {
  id: string;
  studentId: string;
  studentName: string;
  classId: string;
  className: string;
  /** 年级 ID（@contract-pending，MSW 兜底，用于年级筛选） */
  gradeId: string;
  date: string;
  status: string;
  recordedBy: string;
  note: string;
}

export interface AttendanceFilter {
  classId?: string | null;
  status?: string | null;
  date?: string | null;
  /** 年级筛选（@contract-pending，MSW 兜底）。与 classId 互不冲突，可同时设置。 */
  gradeId?: string | null;
}

export interface AttendanceGradeCorrelation {
  classId: string;
  className: string;
  presentRate: number;
  avgScore: number;
  correlation: number;
}

// ============================================================
// Hooks: Users import
// ============================================================
export function useImportUsers(): {
  run: (file: File) => Promise<ImportResult>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<{ importUsers: ImportResult }, { file: File }>(
    IMPORT_USERS_DOC,
  );
  const run = async (file: File): Promise<ImportResult> => {
    const data = await rawRun({ file });
    if (!data?.importUsers) {
      throw new ApiError("Failed to import users", "INTERNAL_ERROR");
    }
    return data.importUsers;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: RBAC role detail + CRUD
// ============================================================
export function useRole(id: string): UseQueryResult<RoleDetail | null> {
  const result = useWidgetQuery<{ role: RoleDetail | null }, { id: string }>(
    GET_ROLE_DOC,
    { id },
  );
  return { ...result, data: result.data?.role ?? null };
}

export function useCreateRole(): {
  run: (input: RoleInput) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { createRole: { id: string; name: string } },
    { input: RoleInput }
  >(CREATE_ROLE_DOC);
  const run = async (
    input: RoleInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ input });
    if (!data?.createRole) {
      throw new ApiError("Failed to create role", "INTERNAL_ERROR");
    }
    return data.createRole;
  };
  return { run, loading, error };
}

export function useUpdateRole(): {
  run: (id: string, input: RoleInput) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateRole: { id: string; name: string } },
    { id: string; input: RoleInput }
  >(UPDATE_ROLE_DOC);
  const run = async (
    id: string,
    input: RoleInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ id, input });
    if (!data?.updateRole) {
      throw new ApiError("Failed to update role", "INTERNAL_ERROR");
    }
    return data.updateRole;
  };
  return { run, loading, error };
}

export function useDeleteRole(): {
  run: (id: string) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<{ deleteRole: { id: string } }, { id: string }>(
    DELETE_ROLE_DOC,
  );
  const run = async (id: string): Promise<{ id: string }> => {
    const data = await rawRun({ id });
    if (!data?.deleteRole) {
      throw new ApiError("Failed to delete role", "INTERNAL_ERROR");
    }
    return data.deleteRole;
  };
  return { run, loading, error };
}

/**
 * 启用/停用角色（@contract-pending MSW 兜底）。
 * 系统锁定角色（isLocked=true）禁止切换。
 */
export function useToggleRoleEnabled(): {
  run: (
    id: string,
    isEnabled: boolean,
  ) => Promise<{ id: string; isEnabled: boolean }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { toggleRoleEnabled: { id: string; isEnabled: boolean } },
    { id: string; isEnabled: boolean }
  >(TOGGLE_ROLE_ENABLED_DOC);
  const run = async (
    id: string,
    isEnabled: boolean,
  ): Promise<{ id: string; isEnabled: boolean }> => {
    const data = await rawRun({ id, isEnabled });
    if (!data?.toggleRoleEnabled) {
      throw new ApiError("Failed to toggle role enabled", "INTERNAL_ERROR");
    }
    return data.toggleRoleEnabled;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: RBAC role permission matrix (CRUD actions per permission point)
// ============================================================
export function useRolePermissions(
  roleId: string,
): UseQueryResult<RolePermissionMatrixItem[]> {
  const result = useWidgetQuery<
    { rolePermissions: RolePermissionMatrixItem[] },
    { roleId: string }
  >(GET_ROLE_PERMISSIONS_DOC, { roleId });
  return { ...result, data: result.data?.rolePermissions ?? [] };
}

export function useUpdateRolePermissionActions(): {
  run: (
    roleId: string,
    permissionUpdates: PermissionActionUpdate[],
  ) => Promise<{ id: string; updatedCount: number }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateRolePermissionActions: { id: string; updatedCount: number } },
    {
      roleId: string;
      permissionUpdates: PermissionActionUpdate[];
    }
  >(UPDATE_ROLE_PERMISSION_ACTIONS_DOC);
  const run = async (
    roleId: string,
    permissionUpdates: PermissionActionUpdate[],
  ): Promise<{ id: string; updatedCount: number }> => {
    const data = await rawRun({ roleId, permissionUpdates });
    if (!data?.updateRolePermissionActions) {
      throw new ApiError(
        "Failed to update role permission actions",
        "INTERNAL_ERROR",
      );
    }
    return data.updateRolePermissionActions;
  };
  return { run, loading, error };
}
export function usePermissionRoleCounts(): UseQueryResult<
  PermissionRoleCount[]
> {
  const result = useWidgetQuery<
    { permissionRoleCounts: PermissionRoleCount[] },
    Record<string, never>
  >(GET_PERMISSION_ROLE_COUNTS_DOC, {});
  return { ...result, data: result.data?.permissionRoleCounts };
}

// ============================================================
// Hooks: Audit logs
// ============================================================
export function useAuditOverviewStats(): UseQueryResult<AuditOverviewStats | null> {
  const result = useWidgetQuery<
    { auditOverviewStats: AuditOverviewStats | null },
    Record<string, never>
  >(GET_AUDIT_OVERVIEW_STATS_DOC, {});
  return { ...result, data: result.data?.auditOverviewStats ?? null };
}

export function useAuditTrend(days: number): UseQueryResult<AuditTrendPoint[]> {
  const result = useWidgetQuery<
    { auditTrend: AuditTrendPoint[] },
    { days: number }
  >(GET_AUDIT_TREND_DOC, { days });
  return { ...result, data: result.data?.auditTrend };
}

export function useDataChangeActionStats(): UseQueryResult<
  DataChangeActionStat[]
> {
  const result = useWidgetQuery<
    { dataChangeActionStats: DataChangeActionStat[] },
    Record<string, never>
  >(GET_DATA_CHANGE_ACTION_STATS_DOC, {});
  return { ...result, data: result.data?.dataChangeActionStats };
}

export function useLoginLogs(
  filter: LoginLogFilter,
  pagination: Pagination,
): UseQueryResult<PaginatedResult<LoginLog>> {
  const result = useWidgetQuery<
    { loginLogs: PaginatedResult<LoginLog> },
    { filter: LoginLogFilter; limit: number; offset: number }
  >(GET_LOGIN_LOGS_DOC, {
    filter,
    limit: pagination.limit,
    offset: pagination.offset,
  });
  return { ...result, data: result.data?.loginLogs };
}

export function useDataChangeLogs(
  filter: DataChangeLogFilter,
  pagination: Pagination,
): UseQueryResult<PaginatedResult<DataChangeLog>> {
  const result = useWidgetQuery<
    { dataChangeLogs: PaginatedResult<DataChangeLog> },
    { filter: DataChangeLogFilter; limit: number; offset: number }
  >(GET_DATA_CHANGE_LOGS_DOC, {
    filter,
    limit: pagination.limit,
    offset: pagination.offset,
  });
  return { ...result, data: result.data?.dataChangeLogs };
}

export function useDataChangeTableOptions(): UseQueryResult<string[]> {
  const result = useWidgetQuery<
    { dataChangeTableOptions: string[] },
    Record<string, never>
  >(GET_DATA_CHANGE_TABLE_OPTIONS_DOC, {});
  return { ...result, data: result.data?.dataChangeTableOptions };
}

export function useDataChangeStats(): UseQueryResult<DataChangeStat[]> {
  const result = useWidgetQuery<
    { dataChangeStats: DataChangeStat[] },
    Record<string, never>
  >(GET_DATA_CHANGE_STATS_DOC, {});
  return { ...result, data: result.data?.dataChangeStats };
}

export function useAuditModuleOptions(): UseQueryResult<string[]> {
  const result = useWidgetQuery<
    { auditModuleOptions: string[] },
    Record<string, never>
  >(GET_AUDIT_MODULE_OPTIONS_DOC, {});
  return { ...result, data: result.data?.auditModuleOptions };
}

// ============================================================
// Hooks: Audit / Login / DataChange - export (CSV)
// ============================================================
export function useExportAuditLogs(): {
  run: (filter: AuditLogFilter) => Promise<ExportResult>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { exportAuditLogs: ExportResult },
    { filter: AuditLogFilter }
  >(EXPORT_AUDIT_LOGS_DOC);
  const run = async (filter: AuditLogFilter): Promise<ExportResult> => {
    const data = await rawRun({ filter });
    if (!data?.exportAuditLogs) {
      throw new ApiError("Failed to export audit logs", "INTERNAL_ERROR");
    }
    return data.exportAuditLogs;
  };
  return { run, loading, error };
}

export function useExportLoginLogs(): {
  run: (filter: LoginLogFilter) => Promise<ExportResult>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { exportLoginLogs: ExportResult },
    { filter: LoginLogFilter }
  >(EXPORT_LOGIN_LOGS_DOC);
  const run = async (filter: LoginLogFilter): Promise<ExportResult> => {
    const data = await rawRun({ filter });
    if (!data?.exportLoginLogs) {
      throw new ApiError("Failed to export login logs", "INTERNAL_ERROR");
    }
    return data.exportLoginLogs;
  };
  return { run, loading, error };
}

export function useExportDataChanges(): {
  run: (filter: DataChangeLogFilter) => Promise<ExportResult>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { exportDataChanges: ExportResult },
    { filter: DataChangeLogFilter }
  >(EXPORT_DATA_CHANGES_DOC);
  const run = async (filter: DataChangeLogFilter): Promise<ExportResult> => {
    const data = await rawRun({ filter });
    if (!data?.exportDataChanges) {
      throw new ApiError("Failed to export data changes", "INTERNAL_ERROR");
    }
    return data.exportDataChanges;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: School CRUD
// ============================================================
export function useSchools(): UseQueryResult<SchoolListItem[]> {
  const result = useWidgetQuery<
    { schools: SchoolListItem[] },
    Record<string, never>
  >(GET_SCHOOLS_DOC, {});
  return { ...result, data: result.data?.schools };
}

export function useCreateSchool(): {
  run: (input: SchoolInput) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { createSchool: { id: string; name: string } },
    { input: SchoolInput }
  >(CREATE_SCHOOL_DOC);
  const run = async (
    input: SchoolInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ input });
    if (!data?.createSchool) {
      throw new ApiError("Failed to create school", "INTERNAL_ERROR");
    }
    return data.createSchool;
  };
  return { run, loading, error };
}

export function useAdminUpdateSchool(): {
  run: (
    id: string,
    input: SchoolInput,
  ) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateSchool: { id: string; name: string } },
    { id: string; input: SchoolInput }
  >(ADMIN_UPDATE_SCHOOL_DOC);
  const run = async (
    id: string,
    input: SchoolInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ id, input });
    if (!data?.updateSchool) {
      throw new ApiError("Failed to update school", "INTERNAL_ERROR");
    }
    return data.updateSchool;
  };
  return { run, loading, error };
}

export function useDeleteSchool(): {
  run: (id: string) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<{ deleteSchool: { id: string } }, { id: string }>(
    DELETE_SCHOOL_DOC,
  );
  const run = async (id: string): Promise<{ id: string }> => {
    const data = await rawRun({ id });
    if (!data?.deleteSchool) {
      throw new ApiError("Failed to delete school", "INTERNAL_ERROR");
    }
    return data.deleteSchool;
  };
  return { run, loading, error };
}

// Departments
export function useDepartments(): UseQueryResult<Department[]> {
  const result = useWidgetQuery<
    { departments: Department[] },
    Record<string, never>
  >(GET_DEPARTMENTS_DOC, {});
  return { ...result, data: result.data?.departments };
}

export function useCreateDepartment(): {
  run: (input: DepartmentInput) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { createDepartment: { id: string; name: string } },
    { input: DepartmentInput }
  >(CREATE_DEPARTMENT_DOC);
  const run = async (
    input: DepartmentInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ input });
    if (!data?.createDepartment) {
      throw new ApiError("Failed to create department", "INTERNAL_ERROR");
    }
    return data.createDepartment;
  };
  return { run, loading, error };
}

export function useUpdateDepartment(): {
  run: (
    id: string,
    input: DepartmentInput,
  ) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateDepartment: { id: string; name: string } },
    { id: string; input: DepartmentInput }
  >(UPDATE_DEPARTMENT_DOC);
  const run = async (
    id: string,
    input: DepartmentInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ id, input });
    if (!data?.updateDepartment) {
      throw new ApiError("Failed to update department", "INTERNAL_ERROR");
    }
    return data.updateDepartment;
  };
  return { run, loading, error };
}

export function useDeleteDepartment(): {
  run: (id: string) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<{ deleteDepartment: { id: string } }, { id: string }>(
    DELETE_DEPARTMENT_DOC,
  );
  const run = async (id: string): Promise<{ id: string }> => {
    const data = await rawRun({ id });
    if (!data?.deleteDepartment) {
      throw new ApiError("Failed to delete department", "INTERNAL_ERROR");
    }
    return data.deleteDepartment;
  };
  return { run, loading, error };
}

// Academic years
export function useAcademicYears(): UseQueryResult<AcademicYear[]> {
  const result = useWidgetQuery<
    { academicYears: AcademicYear[] },
    Record<string, never>
  >(GET_ACADEMIC_YEARS_DOC, {});
  return { ...result, data: result.data?.academicYears };
}

export function useCreateAcademicYear(): {
  run: (input: AcademicYearInput) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { createAcademicYear: { id: string; name: string } },
    { input: AcademicYearInput }
  >(CREATE_ACADEMIC_YEAR_DOC);
  const run = async (
    input: AcademicYearInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ input });
    if (!data?.createAcademicYear) {
      throw new ApiError("Failed to create academic year", "INTERNAL_ERROR");
    }
    return data.createAcademicYear;
  };
  return { run, loading, error };
}

export function useUpdateAcademicYear(): {
  run: (
    id: string,
    input: AcademicYearInput,
  ) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateAcademicYear: { id: string; name: string } },
    { id: string; input: AcademicYearInput }
  >(UPDATE_ACADEMIC_YEAR_DOC);
  const run = async (
    id: string,
    input: AcademicYearInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ id, input });
    if (!data?.updateAcademicYear) {
      throw new ApiError("Failed to update academic year", "INTERNAL_ERROR");
    }
    return data.updateAcademicYear;
  };
  return { run, loading, error };
}

export function useDeleteAcademicYear(): {
  run: (id: string) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<{ deleteAcademicYear: { id: string } }, { id: string }>(
    DELETE_ACADEMIC_YEAR_DOC,
  );
  const run = async (id: string): Promise<{ id: string }> => {
    const data = await rawRun({ id });
    if (!data?.deleteAcademicYear) {
      throw new ApiError("Failed to delete academic year", "INTERNAL_ERROR");
    }
    return data.deleteAcademicYear;
  };
  return { run, loading, error };
}

// Grades
export function useGrades(): UseQueryResult<AdminGradeListItem[]> {
  const result = useWidgetQuery<
    { grades: AdminGradeListItem[] },
    Record<string, never>
  >(GET_GRADES_DOC, {});
  return { ...result, data: result.data?.grades };
}

export function useGradeOverviewStats(): UseQueryResult<GradeOverviewStat[]> {
  const result = useWidgetQuery<
    { gradeOverviewStats: GradeOverviewStat[] },
    Record<string, never>
  >(GET_GRADE_OVERVIEW_STATS_DOC, {});
  return { ...result, data: result.data?.gradeOverviewStats };
}

export function useAdminCreateGrade(): {
  run: (input: GradeInput) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { createGrade: { id: string; name: string } },
    { input: GradeInput }
  >(ADMIN_CREATE_GRADE_DOC);
  const run = async (
    input: GradeInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ input });
    if (!data?.createGrade) {
      throw new ApiError("Failed to create grade", "INTERNAL_ERROR");
    }
    return data.createGrade;
  };
  return { run, loading, error };
}

export function useUpdateGrade(): {
  run: (id: string, input: GradeInput) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateGrade: { id: string; name: string } },
    { id: string; input: GradeInput }
  >(UPDATE_GRADE_DOC);
  const run = async (
    id: string,
    input: GradeInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ id, input });
    if (!data?.updateGrade) {
      throw new ApiError("Failed to update grade", "INTERNAL_ERROR");
    }
    return data.updateGrade;
  };
  return { run, loading, error };
}

export function useDeleteGrade(): {
  run: (id: string) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<{ deleteGrade: { id: string } }, { id: string }>(
    DELETE_GRADE_DOC,
  );
  const run = async (id: string): Promise<{ id: string }> => {
    const data = await rawRun({ id });
    if (!data?.deleteGrade) {
      throw new ApiError("Failed to delete grade", "INTERNAL_ERROR");
    }
    return data.deleteGrade;
  };
  return { run, loading, error };
}

// Admin classes + options
export function useAdminClasses(): UseQueryResult<AdminClassListItem[]> {
  const result = useWidgetQuery<
    { adminClasses: AdminClassListItem[] },
    Record<string, never>
  >(GET_ADMIN_CLASSES_DOC, {});
  return { ...result, data: result.data?.adminClasses };
}

export function useTeacherOptions(): UseQueryResult<OptionItem[]> {
  const result = useWidgetQuery<
    { teacherOptions: OptionItem[] },
    Record<string, never>
  >(GET_TEACHER_OPTIONS_DOC, {});
  return { ...result, data: result.data?.teacherOptions };
}

export function useStaffOptions(): UseQueryResult<OptionItem[]> {
  const result = useWidgetQuery<
    { staffOptions: OptionItem[] },
    Record<string, never>
  >(GET_STAFF_OPTIONS_DOC, {});
  return { ...result, data: result.data?.staffOptions };
}

/**
 * 创建班级（@contract-pending，MSW 兜底）。
 * 用于 admin/school/classes 列表页 ClassFormDialog 新建模式。
 */
export function useCreateAdminClass(): {
  run: (input: AdminClassInput) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { createAdminClass: { id: string; name: string } },
    { input: AdminClassInput }
  >(CREATE_ADMIN_CLASS_DOC);
  const run = async (
    input: AdminClassInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ input });
    if (!data?.createAdminClass) {
      throw new ApiError("Failed to create admin class", "INTERNAL_ERROR");
    }
    return data.createAdminClass;
  };
  return { run, loading, error };
}

/**
 * 更新班级（@contract-pending，MSW 兜底）。
 * 用于 admin/school/classes 列表页 ClassFormDialog 编辑模式。
 */
export function useUpdateAdminClass(): {
  run: (
    id: string,
    input: AdminClassInput,
  ) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateAdminClass: { id: string; name: string } },
    { id: string; input: AdminClassInput }
  >(UPDATE_ADMIN_CLASS_DOC);
  const run = async (
    id: string,
    input: AdminClassInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ id, input });
    if (!data?.updateAdminClass) {
      throw new ApiError("Failed to update admin class", "INTERNAL_ERROR");
    }
    return data.updateAdminClass;
  };
  return { run, loading, error };
}

/**
 * 删除班级（@contract-pending，MSW 兜底）。
 * 用于 admin/school/classes 列表页 ClassDeleteDialog。
 */
export function useDeleteAdminClass(): {
  run: (id: string) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<{ deleteAdminClass: { id: string } }, { id: string }>(
    DELETE_ADMIN_CLASS_DOC,
  );
  const run = async (id: string): Promise<{ id: string }> => {
    const data = await rawRun({ id });
    if (!data?.deleteAdminClass) {
      throw new ApiError("Failed to delete admin class", "INTERNAL_ERROR");
    }
    return data.deleteAdminClass;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: Announcements
// ============================================================
export function useAdminAnnouncements(
  status: string | null,
): UseQueryResult<PaginatedResult<AnnouncementListItem>> {
  const result = useWidgetQuery<
    { adminAnnouncements: PaginatedResult<AnnouncementListItem> },
    { status: string | null }
  >(GET_ADMIN_ANNOUNCEMENTS_DOC, { status });
  return { ...result, data: result.data?.adminAnnouncements };
}

export function useAdminAnnouncement(
  id: string,
): UseQueryResult<AnnouncementDetail | null> {
  const result = useWidgetQuery<
    { adminAnnouncement: AnnouncementDetail | null },
    { id: string }
  >(GET_ADMIN_ANNOUNCEMENT_DETAIL_DOC, { id });
  return { ...result, data: result.data?.adminAnnouncement ?? null };
}

export function useCreateAnnouncement(): {
  run: (input: AnnouncementInput) => Promise<{ id: string; title: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { createAnnouncement: { id: string; title: string } },
    { input: AnnouncementInput }
  >(CREATE_ANNOUNCEMENT_DOC);
  const run = async (
    input: AnnouncementInput,
  ): Promise<{ id: string; title: string }> => {
    const data = await rawRun({ input });
    if (!data?.createAnnouncement) {
      throw new ApiError("Failed to create announcement", "INTERNAL_ERROR");
    }
    return data.createAnnouncement;
  };
  return { run, loading, error };
}

export function useUpdateAnnouncement(): {
  run: (
    id: string,
    input: AnnouncementInput,
  ) => Promise<{ id: string; title: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateAnnouncement: { id: string; title: string } },
    { id: string; input: AnnouncementInput }
  >(UPDATE_ANNOUNCEMENT_DOC);
  const run = async (
    id: string,
    input: AnnouncementInput,
  ): Promise<{ id: string; title: string }> => {
    const data = await rawRun({ id, input });
    if (!data?.updateAnnouncement) {
      throw new ApiError("Failed to update announcement", "INTERNAL_ERROR");
    }
    return data.updateAnnouncement;
  };
  return { run, loading, error };
}

export function useDeleteAnnouncement(): {
  run: (id: string) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<{ deleteAnnouncement: { id: string } }, { id: string }>(
    DELETE_ANNOUNCEMENT_DOC,
  );
  const run = async (id: string): Promise<{ id: string }> => {
    const data = await rawRun({ id });
    if (!data?.deleteAnnouncement) {
      throw new ApiError("Failed to delete announcement", "INTERNAL_ERROR");
    }
    return data.deleteAnnouncement;
  };
  return { run, loading, error };
}

export function useArchiveAnnouncement(): {
  run: (id: string) => Promise<{ id: string; status: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { archiveAnnouncement: { id: string; status: string } },
    { id: string }
  >(ARCHIVE_ANNOUNCEMENT_DOC);
  const run = async (id: string): Promise<{ id: string; status: string }> => {
    const data = await rawRun({ id });
    if (!data?.archiveAnnouncement) {
      throw new ApiError("Failed to archive announcement", "INTERNAL_ERROR");
    }
    return data.archiveAnnouncement;
  };
  return { run, loading, error };
}

export function usePinAnnouncement(): {
  run: (id: string) => Promise<{ id: string; pinnedAt: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { pinAnnouncement: { id: string; pinnedAt: string } },
    { id: string }
  >(PIN_ANNOUNCEMENT_DOC);
  const run = async (id: string): Promise<{ id: string; pinnedAt: string }> => {
    const data = await rawRun({ id });
    if (!data?.pinAnnouncement) {
      throw new ApiError("Failed to pin announcement", "INTERNAL_ERROR");
    }
    return data.pinAnnouncement;
  };
  return { run, loading, error };
}

export function usePublishAnnouncement(): {
  run: (
    id: string,
  ) => Promise<{ id: string; status: string; publishedAt: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    {
      publishAnnouncement: { id: string; status: string; publishedAt: string };
    },
    { id: string }
  >(PUBLISH_ANNOUNCEMENT_DOC);
  const run = async (
    id: string,
  ): Promise<{ id: string; status: string; publishedAt: string }> => {
    const data = await rawRun({ id });
    if (!data?.publishAnnouncement) {
      throw new ApiError("Failed to publish announcement", "INTERNAL_ERROR");
    }
    return data.publishAnnouncement;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: Files
// ============================================================
export function useFileAttachments(
  filter: FileFilter,
): UseQueryResult<PaginatedResult<FileAttachment>> {
  const result = useWidgetQuery<
    { fileAttachments: PaginatedResult<FileAttachment> },
    { filter: FileFilter }
  >(GET_FILE_ATTACHMENTS_DOC, { filter });
  return { ...result, data: result.data?.fileAttachments };
}

export function useFileStats(): UseQueryResult<FileStats | null> {
  const result = useWidgetQuery<
    { fileStats: FileStats | null },
    Record<string, never>
  >(GET_FILE_STATS_DOC, {});
  return { ...result, data: result.data?.fileStats ?? null };
}

export function useUploadFile(): {
  run: (input: UploadFileInput) => Promise<UploadFileResult>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { uploadFile: UploadFileResult },
    { input: UploadFileInput }
  >(UPLOAD_FILE_DOC);
  const run = async (input: UploadFileInput): Promise<UploadFileResult> => {
    const data = await rawRun({ input });
    if (!data?.uploadFile) {
      throw new ApiError("Failed to upload file", "INTERNAL_ERROR");
    }
    return data.uploadFile;
  };
  return { run, loading, error };
}

export function useBatchDeleteFiles(): {
  run: (fileIds: string[]) => Promise<BatchDeleteFilesResult>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { batchDeleteFiles: BatchDeleteFilesResult },
    { fileIds: string[] }
  >(BATCH_DELETE_FILES_DOC);
  const run = async (fileIds: string[]): Promise<BatchDeleteFilesResult> => {
    const data = await rawRun({ fileIds });
    if (!data?.batchDeleteFiles) {
      throw new ApiError("Failed to batch delete files", "INTERNAL_ERROR");
    }
    return data.batchDeleteFiles;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: AI settings
// ============================================================
export function useAiProviders(
  scope: string | null,
): UseQueryResult<AiProvider[]> {
  const result = useWidgetQuery<
    { aiProviders: AiProvider[] },
    { scope: string | null }
  >(GET_AI_PROVIDERS_DOC, { scope });
  return { ...result, data: result.data?.aiProviders };
}

export function useCreateAiProvider(): {
  run: (input: AiProviderInput) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { createAiProvider: { id: string; name: string } },
    { input: AiProviderInput }
  >(CREATE_AI_PROVIDER_DOC);
  const run = async (
    input: AiProviderInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ input });
    if (!data?.createAiProvider) {
      throw new ApiError("Failed to create AI provider", "INTERNAL_ERROR");
    }
    return data.createAiProvider;
  };
  return { run, loading, error };
}

export function useUpdateAiProvider(): {
  run: (
    id: string,
    input: AiProviderInput,
  ) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateAiProvider: { id: string; name: string } },
    { id: string; input: AiProviderInput }
  >(UPDATE_AI_PROVIDER_DOC);
  const run = async (
    id: string,
    input: AiProviderInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ id, input });
    if (!data?.updateAiProvider) {
      throw new ApiError("Failed to update AI provider", "INTERNAL_ERROR");
    }
    return data.updateAiProvider;
  };
  return { run, loading, error };
}

export function useDeleteAiProvider(): {
  run: (id: string) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<{ deleteAiProvider: { id: string } }, { id: string }>(
    DELETE_AI_PROVIDER_DOC,
  );
  const run = async (id: string): Promise<{ id: string }> => {
    const data = await rawRun({ id });
    if (!data?.deleteAiProvider) {
      throw new ApiError("Failed to delete AI provider", "INTERNAL_ERROR");
    }
    return data.deleteAiProvider;
  };
  return { run, loading, error };
}

export function useTestAiProvider(): {
  run: (
    id: string,
  ) => Promise<{ ok: boolean; latencyMs: number; message: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { testAiProvider: { ok: boolean; latencyMs: number; message: string } },
    { id: string }
  >(TEST_AI_PROVIDER_DOC);
  const run = async (
    id: string,
  ): Promise<{ ok: boolean; latencyMs: number; message: string }> => {
    const data = await rawRun({ id });
    if (!data?.testAiProvider) {
      throw new ApiError("Failed to test AI provider", "INTERNAL_ERROR");
    }
    return data.testAiProvider;
  };
  return { run, loading, error };
}

export function useAiUsageDashboard(
  range: string,
): UseQueryResult<AiUsageDashboard | null> {
  const result = useWidgetQuery<
    { aiUsageDashboard: AiUsageDashboard | null },
    { range: string }
  >(GET_AI_USAGE_DASHBOARD_DOC, { range });
  return { ...result, data: result.data?.aiUsageDashboard ?? null };
}

// ============================================================
// Hooks: System settings
// ============================================================
export function useSystemSettings(): UseQueryResult<SystemSetting[]> {
  const result = useWidgetQuery<
    { systemSettings: SystemSetting[] },
    Record<string, never>
  >(GET_SYSTEM_SETTINGS_DOC, {});
  return { ...result, data: result.data?.systemSettings };
}

export function useUpdateSystemSettings(): {
  run: (input: SystemSettingInput[]) => Promise<SystemSetting[]>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateSystemSettings: SystemSetting[] },
    { input: SystemSettingInput[] }
  >(UPDATE_SYSTEM_SETTINGS_DOC);
  const run = async (input: SystemSettingInput[]): Promise<SystemSetting[]> => {
    const data = await rawRun({ input });
    if (!data?.updateSystemSettings) {
      throw new ApiError("Failed to update system settings", "INTERNAL_ERROR");
    }
    return data.updateSystemSettings;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: Viewports
// ============================================================
export function useViewports(): UseQueryResult<Viewport[]> {
  const result = useWidgetQuery<
    { viewports: Viewport[] },
    Record<string, never>
  >(GET_VIEWPORTS_DOC, {});
  return { ...result, data: result.data?.viewports };
}

export function useUpdateViewport(): {
  run: (
    id: string,
    input: ViewportInput,
  ) => Promise<{ id: string; name: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateViewport: { id: string; name: string } },
    { id: string; input: ViewportInput }
  >(UPDATE_VIEWPORT_DOC);
  const run = async (
    id: string,
    input: ViewportInput,
  ): Promise<{ id: string; name: string }> => {
    const data = await rawRun({ id, input });
    if (!data?.updateViewport) {
      throw new ApiError("Failed to update viewport", "INTERNAL_ERROR");
    }
    return data.updateViewport;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: Students / Teachers / Organization
// ============================================================
export function useAdminStudents(
  filter: StudentFilter,
  pagination: Pagination,
): UseQueryResult<PaginatedResult<AdminStudent>> {
  const result = useWidgetQuery<
    { adminStudents: PaginatedResult<AdminStudent> },
    { filter: StudentFilter; limit: number; offset: number }
  >(GET_ADMIN_STUDENTS_DOC, {
    filter,
    limit: pagination.limit,
    offset: pagination.offset,
  });
  return { ...result, data: result.data?.adminStudents };
}

export function useAdminTeachers(
  filter: TeacherFilter,
  pagination: Pagination,
): UseQueryResult<PaginatedResult<AdminTeacher>> {
  const result = useWidgetQuery<
    { adminTeachers: PaginatedResult<AdminTeacher> },
    { filter: TeacherFilter; limit: number; offset: number }
  >(GET_ADMIN_TEACHERS_DOC, {
    filter,
    limit: pagination.limit,
    offset: pagination.offset,
  });
  return { ...result, data: result.data?.adminTeachers };
}

export function useOrganizationTree(): UseQueryResult<OrgNode[]> {
  const result = useWidgetQuery<
    { organizationTree: OrgNode[] },
    Record<string, never>
  >(GET_ORGANIZATION_TREE_DOC, {});
  return { ...result, data: result.data?.organizationTree };
}

// ============================================================
// Hooks: §四补充批次 - Course plans
// ============================================================
export function useAdminCoursePlans(
  status: string | null,
): UseQueryResult<PaginatedResult<AdminCoursePlanListItem>> {
  const result = useWidgetQuery<
    { adminCoursePlans: PaginatedResult<AdminCoursePlanListItem> },
    { status: string | null }
  >(GET_ADMIN_COURSE_PLANS_DOC, { status });
  return { ...result, data: result.data?.adminCoursePlans };
}

export function useAdminCoursePlan(
  id: string,
): UseQueryResult<AdminCoursePlan | null> {
  const result = useWidgetQuery<
    { adminCoursePlan: AdminCoursePlan | null },
    { id: string }
  >(GET_ADMIN_COURSE_PLAN_DOC, { id });
  return { ...result, data: result.data?.adminCoursePlan ?? null };
}

// Curriculum map
export function useStandardsCoverageHeatmap(): UseQueryResult<
  StandardsCoverageCell[]
> {
  const result = useWidgetQuery<
    { standardsCoverageHeatmap: StandardsCoverageCell[] },
    Record<string, never>
  >(GET_STANDARDS_COVERAGE_HEATMAP_DOC, {});
  return { ...result, data: result.data?.standardsCoverageHeatmap };
}

export function useGlobalLessonPlanStats(): UseQueryResult<GlobalLessonPlanStats | null> {
  const result = useWidgetQuery<
    { globalLessonPlanStats: GlobalLessonPlanStats | null },
    Record<string, never>
  >(GET_GLOBAL_LESSON_PLAN_STATS_DOC, {});
  return { ...result, data: result.data?.globalLessonPlanStats ?? null };
}

// Electives
export function useAdminElectives(): UseQueryResult<
  PaginatedResult<AdminElectiveListItem>
> {
  const result = useWidgetQuery<
    { adminElectives: PaginatedResult<AdminElectiveListItem> },
    Record<string, never>
  >(GET_ADMIN_ELECTIVES_DOC, {});
  return { ...result, data: result.data?.adminElectives };
}

export function useAdminElective(
  id: string,
): UseQueryResult<AdminElective | null> {
  const result = useWidgetQuery<
    { adminElective: AdminElective | null },
    { id: string }
  >(GET_ADMIN_ELECTIVE_DOC, { id });
  return { ...result, data: result.data?.adminElective ?? null };
}

// Questions
export function useAdminQuestions(
  filter: QuestionFilter,
): UseQueryResult<PaginatedResult<AdminQuestionListItem>> {
  const result = useWidgetQuery<
    { adminQuestions: PaginatedResult<AdminQuestionListItem> },
    { filter: QuestionFilter }
  >(GET_ADMIN_QUESTIONS_DOC, { filter });
  return { ...result, data: result.data?.adminQuestions };
}

/**
 * 题库单条详情 hook（@contract-pending，MSW 兜底）。
 *
 * 用于详情对话框按 id 拉取题目明细（answer/explanation/knowledgePointTitle 等）。
 * id 为空时不发请求（对话框关闭时跳过）。
 */
export function useAdminQuestion(
  id: string,
  options?: { enabled?: boolean },
): UseQueryResult<AdminQuestionDetail | null> {
  const enabled = options?.enabled ?? true;
  const result = useWidgetQuery<
    { adminQuestion: AdminQuestionDetail | null },
    { id: string }
  >(GET_ADMIN_QUESTION_DOC, { id }, { enabled });
  return { ...result, data: result.data?.adminQuestion ?? null };
}

// Lesson plans
export function useAdminLessonPlans(): UseQueryResult<
  PaginatedResult<AdminLessonPlanListItem>
> {
  const result = useWidgetQuery<
    { adminLessonPlans: PaginatedResult<AdminLessonPlanListItem> },
    Record<string, never>
  >(GET_ADMIN_LESSON_PLANS_DOC, {});
  return { ...result, data: result.data?.adminLessonPlans };
}

export function useAdminLessonPlan(
  id: string,
): UseQueryResult<AdminLessonPlan | null> {
  const result = useWidgetQuery<
    { adminLessonPlan: AdminLessonPlan | null },
    { id: string }
  >(GET_ADMIN_LESSON_PLAN_DOC, { id });
  return { ...result, data: result.data?.adminLessonPlan ?? null };
}

/** 软删除教案 mutation 响应（@contract-pending） */
interface SoftDeleteLessonPlanResponse {
  softDeleteLessonPlan: { success: boolean; deletedAt: string } | null;
}

/**
 * 软删除教案 mutation（@contract-pending，MSW 兜底）。
 *
 * 对齐 CICD softDeleteLessonPlan：将 status 置为 archived，返回 { success, deletedAt }。
 * 用于管理端 admin/lesson-plans 列表/详情页删除按钮。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useSoftDeleteLessonPlan(): {
  run: (planId: string) => Promise<{ success: boolean; deletedAt: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<SoftDeleteLessonPlanResponse, { planId: string }>(
    SOFT_DELETE_LESSON_PLAN_DOC,
  );

  const run = async (
    planId: string,
  ): Promise<{ success: boolean; deletedAt: string }> => {
    const data = await rawRun({ planId });
    if (!data?.softDeleteLessonPlan) {
      throw new ApiError("Failed to soft delete lesson plan", "INTERNAL_ERROR");
    }
    return data.softDeleteLessonPlan;
  };

  return { run, loading, error };
}

// Error book
export function useAdminErrorBookStats(): UseQueryResult<AdminErrorBookStats | null> {
  const result = useWidgetQuery<
    { adminErrorBookStats: AdminErrorBookStats | null },
    Record<string, never>
  >(GET_ADMIN_ERROR_BOOK_STATS_DOC, {});
  return { ...result, data: result.data?.adminErrorBookStats ?? null };
}

/**
 * 导出错题本 CSV mutation（@contract-pending，MSW 兜底）。
 *
 * CSV 由 MSW 用纯函数构造，返回 { success, count, filename, csv } 字符串。
 * 前端拿到 csv 字符串后直接触发下载（与 EXPORT_AUDIT_LOGS_DOC 模式一致）。
 */
export function useExportErrorBookCsv(): {
  run: (filter: {
    subjectId?: string | null;
    classId?: string | null;
  }) => Promise<{
    success: boolean;
    count: number;
    filename: string;
    csv: string;
  }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    {
      exportErrorBookCsv: {
        success: boolean;
        count: number;
        filename: string;
        csv: string;
      };
    },
    { filter: { subjectId?: string | null; classId?: string | null } }
  >(EXPORT_ERROR_BOOK_CSV_DOC);
  const run = async (filter: {
    subjectId?: string | null;
    classId?: string | null;
  }): Promise<{
    success: boolean;
    count: number;
    filename: string;
    csv: string;
  }> => {
    const data = await rawRun({ filter });
    if (!data?.exportErrorBookCsv) {
      throw new ApiError("Failed to export error book CSV", "INTERNAL_ERROR");
    }
    return data.exportErrorBookCsv;
  };
  return { run, loading, error };
}

// Scheduling
export function useAdminScheduleChanges(): UseQueryResult<
  PaginatedResult<ScheduleChange>
> {
  const result = useWidgetQuery<
    { adminScheduleChanges: PaginatedResult<ScheduleChange> },
    Record<string, never>
  >(GET_ADMIN_SCHEDULE_CHANGES_DOC, {});
  return { ...result, data: result.data?.adminScheduleChanges };
}

export function useAdminScheduleEntries(): UseQueryResult<ScheduleEntry[]> {
  const result = useWidgetQuery<
    { adminScheduleEntries: ScheduleEntry[] },
    Record<string, never>
  >(GET_ADMIN_SCHEDULE_ENTRIES_DOC, {});
  return { ...result, data: result.data?.adminScheduleEntries };
}

export function useAdminSchedulingRules(): UseQueryResult<
  AdminSchedulingRule[]
> {
  const result = useWidgetQuery<
    { schedulingRules: AdminSchedulingRule[] },
    Record<string, never>
  >(ADMIN_GET_SCHEDULING_RULES_DOC, {});
  return { ...result, data: result.data?.schedulingRules };
}

export function useUpdateSchedulingRules(): {
  run: (
    input: Array<{ id: string; isEnabled: boolean }>,
  ) => Promise<Array<{ id: string; isEnabled: boolean }>>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateSchedulingRules: Array<{ id: string; isEnabled: boolean }> },
    { input: Array<{ id: string; isEnabled: boolean }> }
  >(UPDATE_SCHEDULING_RULES_DOC);
  const run = async (
    input: Array<{ id: string; isEnabled: boolean }>,
  ): Promise<Array<{ id: string; isEnabled: boolean }>> => {
    const data = await rawRun({ input });
    if (!data?.updateSchedulingRules) {
      throw new ApiError("Failed to update scheduling rules", "INTERNAL_ERROR");
    }
    return data.updateSchedulingRules;
  };
  return { run, loading, error };
}

export function useApproveScheduleChange(): {
  run: (id: string) => Promise<{ id: string; status: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { approveScheduleChange: { id: string; status: string } },
    { id: string }
  >(APPROVE_SCHEDULE_CHANGE_DOC);
  const run = async (id: string): Promise<{ id: string; status: string }> => {
    const data = await rawRun({ id });
    if (!data?.approveScheduleChange) {
      throw new ApiError("Failed to approve schedule change", "INTERNAL_ERROR");
    }
    return data.approveScheduleChange;
  };
  return { run, loading, error };
}

export function useRejectScheduleChange(): {
  run: (id: string, reason: string) => Promise<{ id: string; status: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { rejectScheduleChange: { id: string; status: string } },
    { id: string; reason: string }
  >(REJECT_SCHEDULE_CHANGE_DOC);
  const run = async (
    id: string,
    reason: string,
  ): Promise<{ id: string; status: string }> => {
    const data = await rawRun({ id, reason });
    if (!data?.rejectScheduleChange) {
      throw new ApiError("Failed to reject schedule change", "INTERNAL_ERROR");
    }
    return data.rejectScheduleChange;
  };
  return { run, loading, error };
}

export function useAutoSchedule(): {
  run: (classId: string) => Promise<{
    classId: string;
    generatedEntries: number;
    conflicts: string[];
  }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    {
      autoSchedule: {
        classId: string;
        generatedEntries: number;
        conflicts: string[];
      };
    },
    { classId: string }
  >(AUTO_SCHEDULE_DOC);
  const run = async (
    classId: string,
  ): Promise<{
    classId: string;
    generatedEntries: number;
    conflicts: string[];
  }> => {
    const data = await rawRun({ classId });
    if (!data?.autoSchedule) {
      throw new ApiError("Failed to auto schedule", "INTERNAL_ERROR");
    }
    return data.autoSchedule;
  };
  return { run, loading, error };
}

// Attendance
export function useAdminAttendanceStats(): UseQueryResult<AdminAttendanceStats | null> {
  const result = useWidgetQuery<
    { adminAttendanceStats: AdminAttendanceStats | null },
    Record<string, never>
  >(GET_ADMIN_ATTENDANCE_STATS_DOC, {});
  return { ...result, data: result.data?.adminAttendanceStats ?? null };
}

export function useAdminAttendanceRecords(
  filter: AttendanceFilter,
  pagination: Pagination,
): UseQueryResult<PaginatedResult<AdminAttendanceRecord>> {
  const result = useWidgetQuery<
    { adminAttendanceRecords: PaginatedResult<AdminAttendanceRecord> },
    { filter: AttendanceFilter; limit: number; offset: number }
  >(GET_ADMIN_ATTENDANCE_RECORDS_DOC, {
    filter,
    limit: pagination.limit,
    offset: pagination.offset,
  });
  return { ...result, data: result.data?.adminAttendanceRecords };
}

export function useAttendanceGradeCorrelation(): UseQueryResult<
  AttendanceGradeCorrelation[]
> {
  const result = useWidgetQuery<
    { attendanceGradeCorrelation: AttendanceGradeCorrelation[] },
    Record<string, never>
  >(GET_ATTENDANCE_GRADE_CORRELATION_DOC, {});
  return { ...result, data: result.data?.attendanceGradeCorrelation };
}

// ============================================================
// Types & Hooks: Audit retention config + purge（@contract-pending，MSW 兜底）
// ============================================================
export interface AuditRetentionConfig {
  retentionDays: number;
  loginLogRetentionDays: number;
  autoCleanupEnabled: boolean;
}

export interface PurgeResult {
  auditLogsDeleted: number;
  loginLogsDeleted: number;
  dataChangeLogsDeleted: number;
}

export interface AuditRetentionConfigInput {
  retentionDays: number;
  loginLogRetentionDays: number;
  autoCleanupEnabled: boolean;
}

export function useAuditRetentionConfig(): UseQueryResult<AuditRetentionConfig | null> {
  const result = useWidgetQuery<
    { auditRetentionConfig: AuditRetentionConfig | null },
    Record<string, never>
  >(GET_AUDIT_RETENTION_CONFIG_DOC, {});
  return { ...result, data: result.data?.auditRetentionConfig ?? null };
}

export function useSaveAuditRetentionConfig(): {
  run: (input: AuditRetentionConfigInput) => Promise<AuditRetentionConfig>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { saveAuditRetentionConfig: AuditRetentionConfig },
    { input: AuditRetentionConfigInput }
  >(SAVE_AUDIT_RETENTION_CONFIG_DOC);
  const run = async (
    input: AuditRetentionConfigInput,
  ): Promise<AuditRetentionConfig> => {
    const data = await rawRun({ input });
    if (!data?.saveAuditRetentionConfig) {
      throw new ApiError(
        "Failed to save audit retention config",
        "INTERNAL_ERROR",
      );
    }
    return data.saveAuditRetentionConfig;
  };
  return { run, loading, error };
}

export function usePurgeExpiredAuditLogs(): {
  run: (
    retentionDays: number,
    loginLogRetentionDays?: number,
  ) => Promise<PurgeResult>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { purgeExpiredAuditLogs: PurgeResult },
    { retentionDays: number; loginLogRetentionDays?: number | null }
  >(PURGE_EXPIRED_AUDIT_LOGS_DOC);
  const run = async (
    retentionDays: number,
    loginLogRetentionDays?: number,
  ): Promise<PurgeResult> => {
    const data = await rawRun(
      loginLogRetentionDays !== undefined
        ? { retentionDays, loginLogRetentionDays }
        : { retentionDays, loginLogRetentionDays: null },
    );
    if (!data?.purgeExpiredAuditLogs) {
      throw new ApiError(
        "Failed to purge expired audit logs",
        "INTERNAL_ERROR",
      );
    }
    return data.purgeExpiredAuditLogs;
  };
  return { run, loading, error };
}
// ============================================================
// Hooks: Course plan items CRUD（@contract-pending，MSW 兜底）
// ============================================================
export function useCreateCoursePlanItem(): {
  run: (input: AdminCoursePlanItemInput) => Promise<AdminCoursePlanItem>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { createCoursePlanItem: AdminCoursePlanItem },
    { input: AdminCoursePlanItemInput }
  >(CREATE_COURSE_PLAN_ITEM_DOC);
  const run = async (
    input: AdminCoursePlanItemInput,
  ): Promise<AdminCoursePlanItem> => {
    const data = await rawRun({ input });
    if (!data?.createCoursePlanItem) {
      throw new ApiError("Failed to create course plan item", "INTERNAL_ERROR");
    }
    return data.createCoursePlanItem;
  };
  return { run, loading, error };
}

export function useUpdateCoursePlanItem(): {
  run: (
    id: string,
    input: AdminCoursePlanItemUpdateInput,
  ) => Promise<AdminCoursePlanItem>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { updateCoursePlanItem: AdminCoursePlanItem },
    { id: string; input: AdminCoursePlanItemUpdateInput }
  >(UPDATE_COURSE_PLAN_ITEM_DOC);
  const run = async (
    id: string,
    input: AdminCoursePlanItemUpdateInput,
  ): Promise<AdminCoursePlanItem> => {
    const data = await rawRun({ id, input });
    if (!data?.updateCoursePlanItem) {
      throw new ApiError("Failed to update course plan item", "INTERNAL_ERROR");
    }
    return data.updateCoursePlanItem;
  };
  return { run, loading, error };
}
export function useDeleteCoursePlanItem(): {
  run: (id: string) => Promise<{ id: string; success: boolean }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    { deleteCoursePlanItem: { id: string; success: boolean } },
    { id: string }
  >(DELETE_COURSE_PLAN_ITEM_DOC);
  const run = async (id: string): Promise<{ id: string; success: boolean }> => {
    const data = await rawRun({ id });
    if (!data?.deleteCoursePlanItem) {
      throw new ApiError("Failed to delete course plan item", "INTERNAL_ERROR");
    }
    return data.deleteCoursePlanItem;
  };
  return { run, loading, error };
}

export function useToggleCoursePlanItemCompleted(): {
  run: (
    id: string,
    isCompleted: boolean,
  ) => Promise<{
    id: string;
    isCompleted: boolean;
    completedAt: string | null;
    updatedAt: string;
  }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    {
      toggleCoursePlanItemCompleted: {
        id: string;
        isCompleted: boolean;
        completedAt: string | null;
        updatedAt: string;
      };
    },
    { id: string; isCompleted: boolean }
  >(TOGGLE_COURSE_PLAN_ITEM_COMPLETED_DOC);
  const run = async (
    id: string,
    isCompleted: boolean,
  ): Promise<{
    id: string;
    isCompleted: boolean;
    completedAt: string | null;
    updatedAt: string;
  }> => {
    const data = await rawRun({ id, isCompleted });
    if (!data?.toggleCoursePlanItemCompleted) {
      throw new ApiError(
        "Failed to toggle course plan item completed",
        "INTERNAL_ERROR",
      );
    }
    return data.toggleCoursePlanItemCompleted;
  };
  return { run, loading, error };
}

export function useReorderCoursePlanItems(): {
  run: (
    planId: string,
    items: ReorderCoursePlanItemInput[],
  ) => Promise<Array<{ id: string; week: number; updatedAt: string }>>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    {
      reorderCoursePlanItems: Array<{
        id: string;
        week: number;
        updatedAt: string;
      }>;
    },
    { planId: string; items: ReorderCoursePlanItemInput[] }
  >(REORDER_COURSE_PLAN_ITEMS_DOC);
  const run = async (
    planId: string,
    items: ReorderCoursePlanItemInput[],
  ): Promise<Array<{ id: string; week: number; updatedAt: string }>> => {
    const data = await rawRun({ planId, items });
    if (!data?.reorderCoursePlanItems) {
      throw new ApiError(
        "Failed to reorder course plan items",
        "INTERNAL_ERROR",
      );
    }
    return data.reorderCoursePlanItems;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: 课程计划 CRUD + 批量操作（@contract-pending，MSW 兜底）
// ============================================================

/** 删除课程计划 mutation 响应（@contract-pending） */
interface DeleteCoursePlanResponse {
  deleteCoursePlan: { id: string; success: boolean } | null;
}

/**
 * 删除课程计划（@contract-pending，MSW 兜底）。
 * 用于详情页/列表页删除按钮，调用后建议 refetch 列表。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useDeleteCoursePlan(): {
  run: (id: string) => Promise<{ id: string; success: boolean }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<DeleteCoursePlanResponse, { id: string }>(
    DELETE_COURSE_PLAN_DOC,
  );
  const run = async (id: string): Promise<{ id: string; success: boolean }> => {
    const data = await rawRun({ id });
    if (!data?.deleteCoursePlan) {
      throw new ApiError("Failed to delete course plan", "INTERNAL_ERROR");
    }
    return data.deleteCoursePlan;
  };
  return { run, loading, error };
}

/** 批量切换周计划项完成状态 mutation 响应（@contract-pending） */
interface BulkToggleCoursePlanItemsResponse {
  bulkToggleCoursePlanItems: Array<{
    id: string;
    isCompleted: boolean;
    completedAt: string | null;
    updatedAt: string;
  }>;
}

/**
 * 批量切换周计划项完成状态（@contract-pending，MSW 兜底）。
 * 用于详情页批量"标记完成/取消完成"操作。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useBulkToggleCoursePlanItems(): {
  run: (
    planId: string,
    itemIds: string[],
    isCompleted: boolean,
  ) => Promise<
    Array<{
      id: string;
      isCompleted: boolean;
      completedAt: string | null;
      updatedAt: string;
    }>
  >;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    BulkToggleCoursePlanItemsResponse,
    { planId: string; itemIds: string[]; isCompleted: boolean }
  >(BULK_TOGGLE_COURSE_PLAN_ITEMS_DOC);
  const run = async (
    planId: string,
    itemIds: string[],
    isCompleted: boolean,
  ): Promise<
    Array<{
      id: string;
      isCompleted: boolean;
      completedAt: string | null;
      updatedAt: string;
    }>
  > => {
    const data = await rawRun({ planId, itemIds, isCompleted });
    if (!data?.bulkToggleCoursePlanItems) {
      throw new ApiError(
        "Failed to bulk toggle course plan items",
        "INTERNAL_ERROR",
      );
    }
    return data.bulkToggleCoursePlanItems;
  };
  return { run, loading, error };
}

// ============================================================
// Hooks: 选修课 CRUD + 业务动作（@contract-pending，MSW 兜底）
// ============================================================

/** 创建选修课 mutation 响应（@contract-pending） */
interface AdminCreateElectiveResponse {
  createElective: { id: string } | null;
}

/**
 * 创建选修课（@contract-pending，MSW 兜底，admin scope）。
 * 与 elective.ts 的 useCreateElective 区别：本 hook 走 admin scope，
 * 支持扩展字段（classroom / schedule / credit / selectionMode 等）。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useAdminCreateElective(): {
  run: (input: AdminCreateElectiveInput) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    AdminCreateElectiveResponse,
    { input: AdminCreateElectiveInput }
  >(CREATE_ELECTIVE_DOC);
  const run = async (
    input: AdminCreateElectiveInput,
  ): Promise<{ id: string }> => {
    const data = await rawRun({ input });
    if (!data?.createElective) {
      throw new ApiError("Failed to create elective", "INTERNAL_ERROR");
    }
    return data.createElective;
  };
  return { run, loading, error };
}

/** 更新选修课 mutation 响应（@contract-pending） */
interface AdminUpdateElectiveResponse {
  updateElective: { id: string } | null;
}

/**
 * 更新选修课（@contract-pending，MSW 兜底，admin scope）。
 * 与 elective.ts 的 useUpdateElective 区别：本 hook 走 admin scope，
 * 支持扩展字段。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useAdminUpdateElective(): {
  run: (input: AdminUpdateElectiveInput) => Promise<{ id: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<
    AdminUpdateElectiveResponse,
    { input: AdminUpdateElectiveInput }
  >(UPDATE_ELECTIVE_DOC);
  const run = async (
    input: AdminUpdateElectiveInput,
  ): Promise<{ id: string }> => {
    const data = await rawRun({ input });
    if (!data?.updateElective) {
      throw new ApiError("Failed to update elective", "INTERNAL_ERROR");
    }
    return data.updateElective;
  };
  return { run, loading, error };
}

/** 删除选修课 mutation 响应（@contract-pending） */
interface DeleteElectiveResponse {
  deleteElective: { id: string; success: boolean } | null;
}

/**
 * 删除选修课（@contract-pending，MSW 兜底）。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useDeleteElective(): {
  run: (id: string) => Promise<{ id: string; success: boolean }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<DeleteElectiveResponse, { id: string }>(
    DELETE_ELECTIVE_DOC,
  );
  const run = async (id: string): Promise<{ id: string; success: boolean }> => {
    const data = await rawRun({ id });
    if (!data?.deleteElective) {
      throw new ApiError("Failed to delete elective", "INTERNAL_ERROR");
    }
    return data.deleteElective;
  };
  return { run, loading, error };
}

/** 开放选课 mutation 响应（@contract-pending） */
interface OpenElectiveSelectionResponse {
  openElectiveSelection: {
    id: string;
    status: string;
    updatedAt: string;
  } | null;
}

/**
 * 开放选课（@contract-pending，MSW 兜底）。
 * 将选修课状态从 DRAFT 切换为 OPEN。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useOpenElectiveSelection(): {
  run: (
    id: string,
  ) => Promise<{ id: string; status: string; updatedAt: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<OpenElectiveSelectionResponse, { id: string }>(
    OPEN_ELECTIVE_SELECTION_DOC,
  );
  const run = async (
    id: string,
  ): Promise<{ id: string; status: string; updatedAt: string }> => {
    const data = await rawRun({ id });
    if (!data?.openElectiveSelection) {
      throw new ApiError("Failed to open elective selection", "INTERNAL_ERROR");
    }
    return data.openElectiveSelection;
  };
  return { run, loading, error };
}

/** 关闭选课 mutation 响应（@contract-pending） */
interface CloseElectiveSelectionResponse {
  closeElectiveSelection: {
    id: string;
    status: string;
    updatedAt: string;
  } | null;
}

/**
 * 关闭选课（@contract-pending，MSW 兜底）。
 * 将选修课状态从 OPEN 切换为 CLOSED。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useCloseElectiveSelection(): {
  run: (
    id: string,
  ) => Promise<{ id: string; status: string; updatedAt: string }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<CloseElectiveSelectionResponse, { id: string }>(
    CLOSE_ELECTIVE_SELECTION_DOC,
  );
  const run = async (
    id: string,
  ): Promise<{ id: string; status: string; updatedAt: string }> => {
    const data = await rawRun({ id });
    if (!data?.closeElectiveSelection) {
      throw new ApiError(
        "Failed to close elective selection",
        "INTERNAL_ERROR",
      );
    }
    return data.closeElectiveSelection;
  };
  return { run, loading, error };
}

/** 运行选课抽签 mutation 响应（@contract-pending） */
interface RunElectiveLotteryResponse {
  runElectiveLottery: {
    id: string;
    status: string;
    selectedCount: number;
    updatedAt: string;
  } | null;
}

/**
 * 运行选课抽签（@contract-pending，MSW 兜底）。
 * 对 LOTTERY 模式的选修课执行抽签，返回最终中选人数。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useRunElectiveLottery(): {
  run: (id: string) => Promise<{
    id: string;
    status: string;
    selectedCount: number;
    updatedAt: string;
  }>;
  loading: boolean;
  error: unknown;
} {
  const {
    run: rawRun,
    loading,
    error,
  } = useWidgetMutation<RunElectiveLotteryResponse, { id: string }>(
    RUN_ELECTIVE_LOTTERY_DOC,
  );
  const run = async (
    id: string,
  ): Promise<{
    id: string;
    status: string;
    selectedCount: number;
    updatedAt: string;
  }> => {
    const data = await rawRun({ id });
    if (!data?.runElectiveLottery) {
      throw new ApiError("Failed to run elective lottery", "INTERNAL_ERROR");
    }
    return data.runElectiveLottery;
  };
  return { run, loading, error };
}

/** 选修课总览统计查询响应（@contract-pending） */
interface ElectiveOverviewStatsResponse {
  electiveOverviewStats: ElectiveOverviewStats | null;
}

/**
 * 查询选修课总览统计（@contract-pending，MSW 兜底）。
 * 用于列表页 StatsGrid 顶部统计卡片（总数 / 容量 / 已选 / 草稿 / 报名中）。
 *
 * 关联：ARCHITECTURE.md §5.4 / §9.4 / §11.4 契约工单
 */
export function useGetElectiveOverviewStats(): UseQueryResult<ElectiveOverviewStats | null> {
  const result = useWidgetQuery<
    ElectiveOverviewStatsResponse,
    Record<string, never>
  >(GET_ELECTIVE_OVERVIEW_STATS_DOC, {});
  return {
    ...result,
    data: result.data?.electiveOverviewStats ?? null,
  };
}