/**
 * GraphQL operations - P7 扩展（选修课 + 富文本编辑 + 监考 + 扫描批改 + 课标热力图）
 *
 * 维护者：ai13（teacher-portal）
 * 关联：graphql.ts P2/P3 扩展、workline.md §3 P7 交付物
 *
 * schema 尚未在 ARB-001 P2 第一版中定义，开发期通过 MSW 拦截返回 mock 响应；
 * 上游就绪后由 ai03 在 teacher-bff.graphql 扩展，届时合并本文件到 graphql.ts。
 *
 * 查询范围（P7-advanced）：
 * - ElectiveCourses / ElectiveCourseDetail：选修课列表 + 详情
 * - CreateElectiveCourse / UpdateElectiveCourse / PublishElectiveCourse / CancelElectiveCourse
 * - ExamRichEditor / SaveExamRichContent：富文本试卷内容
 * - ProctoringStatus / ProctoringEvent：监考状态 + 事件
 * - SubmissionScanGrading / SaveScanGrading：扫描批改
 * - LessonPlanHeatmap：课标覆盖热力图
 */

import { gql } from "urql";

// ============ Types（选修课） ============

/** 选修课状态 */
export type ElectiveCourseStatus =
  | "draft"
  | "open"
  | "closed"
  | "cancelled";

/** 选课学生项 */
export interface ElectiveStudent {
  studentId: string;
  studentName: string;
  studentNo: string;
  enrolledAt: string;
  status: "enrolled" | "cancelled";
}

/** 选修课列表项 */
export interface ElectiveCourseItem {
  id: string;
  title: string;
  subject: string;
  grade: string;
  capacity: number;
  enrolledCount: number;
  teacherId: string;
  teacherName: string;
  semester: string;
  status: ElectiveCourseStatus;
  description: string | null;
}

/** 选修课详情（含学生列表） */
export interface ElectiveCourseDetail extends ElectiveCourseItem {
  students: ElectiveStudent[];
  createdAt: string;
  updatedAt: string;
}

/** 创建选修课输入 */
export interface CreateElectiveCourseInput {
  title: string;
  subject: string;
  grade: string;
  capacity: number;
  semester: string;
  description?: string | null;
}

/** 更新选修课输入 */
export interface UpdateElectiveCourseInput {
  id: string;
  title?: string;
  subject?: string;
  grade?: string;
  capacity?: number;
  semester?: string;
  description?: string | null;
}

/** 创建/更新结果 */
export interface ElectiveCourseMutationResult {
  id: string;
  status: ElectiveCourseStatus;
  updatedAt: string;
}

// ============ Types（富文本编辑） ============

/** 富文本试卷内容（Tiptap examNodes JSON 结构，mock 用 JSON） */
export interface ExamRichContent {
  examId: string;
  title: string;
  totalScore: number;
  questionCount: number;
  content: unknown; // Tiptap JSON，结构由编辑器决定
  updatedAt: string;
}

/** 保存富文本输入 */
export interface SaveExamRichContentInput {
  examId: string;
  content: unknown;
}

/** 保存富文本结果 */
export interface SaveExamRichContentResult {
  examId: string;
  updatedAt: string;
}

// ============ Types（监考） ============

/** 监考学生状态 */
export type ProctoringStudentStatus =
  | "online"
  | "offline"
  | "submitted"
  | "flagged";

/** 监考摘要 */
export interface ProctoringSummary {
  examId: string;
  expectedCount: number;
  onlineCount: number;
  submittedCount: number;
  flaggedCount: number;
  isProctoring: boolean;
  startedAt: string | null;
}

/** 监考学生状态项 */
export interface ProctoringStudent {
  studentId: string;
  studentName: string;
  studentNo: string;
  status: ProctoringStudentStatus;
  lastEventAt: string | null;
  ipAddress: string | null;
}

/** 监考事件类型 */
export type ProctoringEventType = "WARNING" | "FLAG" | "NOTE";

/** 监考事件项 */
export interface ProctoringEvent {
  eventId: string;
  examId: string;
  studentId: string;
  studentName: string;
  studentNo: string;
  eventType: ProctoringEventType;
  note: string | null;
  createdAt: string;
}

/** 监考状态完整结构 */
export interface ProctoringStatus {
  summary: ProctoringSummary;
  students: ProctoringStudent[];
  recentEvents: ProctoringEvent[];
}

/** 提交监考事件输入 */
export interface ProctoringEventInput {
  examId: string;
  studentId: string;
  eventType: ProctoringEventType;
  note?: string | null;
}

/** 提交监考事件结果 */
export interface ProctoringEventResult {
  eventId: string;
  createdAt: string;
}

// ============ Types（扫描批改） ============

/** 扫描图片项 */
export interface ScanImage {
  imageId: string;
  url: string;
  page: number;
}

/** 扫描批改单题项 */
export interface ScanGradingItem {
  questionId: string;
  questionTitle: string;
  questionOrder: number;
  maxScore: number;
  recognizedAnswer: string;
  aiSuggestedScore: number | null;
  aiSuggestion: string | null;
  score: number | null;
  feedback: string | null;
}

/** 扫描批改视图 */
export interface SubmissionScanGrading {
  submissionId: string;
  homeworkTitle: string;
  studentName: string;
  studentNo: string;
  submittedAt: string;
  images: ScanImage[];
  items: ScanGradingItem[];
  prevSubmissionId: string | null;
  nextSubmissionId: string | null;
}

/** 保存扫描批改单项 */
export interface SaveScanGradingItem {
  questionId: string;
  score: number;
  feedback?: string | null;
}

/** 保存扫描批改输入 */
export interface SaveScanGradingInput {
  submissionId: string;
  items: SaveScanGradingItem[];
}

/** 保存扫描批改结果 */
export interface SaveScanGradingResult {
  submissionId: string;
  totalScore: number;
  savedAt: string;
}

// ============ Types（课标热力图） ============

/** 热力图知识点项 */
export interface HeatmapKnowledgePoint {
  kpId: string;
  name: string;
  chapterName: string;
}

/** 热力图课案项 */
export interface HeatmapLessonPlan {
  planId: string;
  title: string;
}

/** 热力图覆盖矩阵单元格 */
export interface HeatmapCell {
  kpId: string;
  planId: string;
  coverage: number; // 0-3 覆盖课案数
}

/** 课标覆盖热力图 */
export interface LessonPlanHeatmap {
  textbookId: string;
  textbookTitle: string;
  knowledgePoints: HeatmapKnowledgePoint[];
  lessonPlans: HeatmapLessonPlan[];
  cells: HeatmapCell[];
}

// ============ Queries / Mutations（选修课） ============

/** 选修课列表查询（按状态筛选，教师范围） */
export const ElectiveCoursesQuery = gql`
  query ElectiveCourses($status: String, $subject: String) {
    electiveCourses(status: $status, subject: $subject) {
      id
      title
      subject
      grade
      capacity
      enrolledCount
      teacherId
      teacherName
      semester
      status
      description
    }
  }
`;

/** 选修课详情查询（含学生列表） */
export const ElectiveCourseDetailQuery = gql`
  query ElectiveCourseDetail($id: ID!) {
    electiveCourseDetail(id: $id) {
      id
      title
      subject
      grade
      capacity
      enrolledCount
      teacherId
      teacherName
      semester
      status
      description
      students {
        studentId
        studentName
        studentNo
        enrolledAt
        status
      }
      createdAt
      updatedAt
    }
  }
`;

/** 创建选修课 Mutation */
export const CreateElectiveCourseMutation = gql`
  mutation CreateElectiveCourse($input: CreateElectiveCourseInput!) {
    createElectiveCourse(input: $input) {
      id
      status
      updatedAt
    }
  }
`;

/** 更新选修课 Mutation */
export const UpdateElectiveCourseMutation = gql`
  mutation UpdateElectiveCourse($input: UpdateElectiveCourseInput!) {
    updateElectiveCourse(input: $input) {
      id
      status
      updatedAt
    }
  }
`;

/** 发布选修课 Mutation */
export const PublishElectiveCourseMutation = gql`
  mutation PublishElectiveCourse($id: ID!) {
    publishElectiveCourse(id: $id) {
      id
      status
      updatedAt
    }
  }
`;

/** 取消选修课 Mutation */
export const CancelElectiveCourseMutation = gql`
  mutation CancelElectiveCourse($id: ID!) {
    cancelElectiveCourse(id: $id) {
      id
      status
      updatedAt
    }
  }
`;

// ============ Queries / Mutations（富文本编辑） ============

/** 富文本试卷内容查询 */
export const ExamRichEditorQuery = gql`
  query ExamRichEditor($examId: ID!) {
    examRichEditor(examId: $examId) {
      examId
      title
      totalScore
      questionCount
      content
      updatedAt
    }
  }
`;

/** 保存富文本内容 Mutation */
export const SaveExamRichContentMutation = gql`
  mutation SaveExamRichContent($input: SaveExamRichContentInput!) {
    saveExamRichContent(input: $input) {
      examId
      updatedAt
    }
  }
`;

// ============ Queries / Mutations（监考） ============

/** 监考状态查询 */
export const ProctoringStatusQuery = gql`
  query ProctoringStatus($examId: ID!) {
    proctoringStatus(examId: $examId) {
      summary {
        examId
        expectedCount
        onlineCount
        submittedCount
        flaggedCount
        isProctoring
        startedAt
      }
      students {
        studentId
        studentName
        studentNo
        status
        lastEventAt
        ipAddress
      }
      recentEvents {
        eventId
        examId
        studentId
        studentName
        studentNo
        eventType
        note
        createdAt
      }
    }
  }
`;

/** 提交监考事件 Mutation */
export const ProctoringEventMutation = gql`
  mutation ProctoringEvent($input: ProctoringEventInput!) {
    proctoringEvent(input: $input) {
      eventId
      createdAt
    }
  }
`;

// ============ Queries / Mutations（扫描批改） ============

/** 扫描批改视图查询 */
export const SubmissionScanGradingQuery = gql`
  query SubmissionScanGrading($submissionId: ID!) {
    submissionScanGrading(submissionId: $submissionId) {
      submissionId
      homeworkTitle
      studentName
      studentNo
      submittedAt
      images {
        imageId
        url
        page
      }
      items {
        questionId
        questionTitle
        questionOrder
        maxScore
        recognizedAnswer
        aiSuggestedScore
        aiSuggestion
        score
        feedback
      }
      prevSubmissionId
      nextSubmissionId
    }
  }
`;

/** 保存扫描批改 Mutation */
export const SaveScanGradingMutation = gql`
  mutation SaveScanGrading($input: SaveScanGradingInput!) {
    saveScanGrading(input: $input) {
      submissionId
      totalScore
      savedAt
    }
  }
`;

// ============ Queries（课标热力图） ============

/** 课标覆盖热力图查询（按教材 ID） */
export const LessonPlanHeatmapQuery = gql`
  query LessonPlanHeatmap($textbookId: ID!) {
    lessonPlanHeatmap(textbookId: $textbookId) {
      textbookId
      textbookTitle
      knowledgePoints {
        kpId
        name
        chapterName
      }
      lessonPlans {
        planId
        title
      }
      cells {
        kpId
        planId
        coverage
      }
    }
  }
`;