// Elective domain GraphQL documents (ARCHITECTURE.md §5.3 契约纪律 / §9.1)
//
// 拆分原则：
// - 全部操作：❌ schema 无 electives / elective(id) 根字段，也无 Mutation 类型
//     → 走 MSW 兜底（@contract-pending），等待后端补齐契约
//
// 契约工单：docs/architecture/issues/contracts/core-edu_contract.md#elective
// 关联：ARCHITECTURE.md §5.3 / §5.4 / §9.1 / §11.4
import { gql } from "@apollo/client";

// ── 假契约查询（@contract-pending）─────────────────────────────
// 列表查询：schema 无 electives(...) 根字段
// 页面通过 MSW 兜底获取列表数据，后端补齐后切换 fetcher 指向真实查询
// 契约工单：core-edu_contract.md#electives-list
export const GET_ELECTIVES_DOC = gql`
  query GetElectives($status: String, $q: String, $limit: Int, $offset: Int) {
    electives(status: $status, q: $q, limit: $limit, offset: $offset) {
      items {
        id
        name
        description
        capacity
        enrolledCount
        semester
        gradeLevel
        subject
        teacherId
        teacherName
        status
        createdAt
        updatedAt
      }
      total
    }
  }
`;

// ── 单查（@contract-pending）────────────────────────────────────
// schema 无 elective(id) 根字段 → MSW 兜底
// 用于 /shell/teacher/elective/[id]/edit 编辑表单页预填
// 契约工单：core-edu_contract.md#elective-by-id
export const GET_ELECTIVE_DOC = gql`
  query GetElective($id: ID!) {
    elective(id: $id) {
      id
      name
      description
      capacity
      enrolledCount
      semester
      gradeLevel
      subject
      teacherId
      teacherName
      status
      createdAt
      updatedAt
    }
  }
`;

// ── 假契约变更（@contract-pending）─────────────────────────────
// 创建选修课：schema 无 Mutation 类型
// 页面通过 MSW 兜底提交，后端补齐 mutation 后切换 fetcher
// 契约工单：core-edu_contract.md#create-elective
export const CREATE_ELECTIVE_DOC = gql`
  mutation CreateElective($input: CreateElectiveInput!) {
    createElective(input: $input) {
      id
    }
  }
`;

// ── 更新选修课 mutation（@contract-pending）────────────────────
// schema 无 Mutation 类型 → MSW 兜底
// 用于 /shell/teacher/elective/[id]/edit 编辑表单页保存
// 契约工单：core-edu_contract.md#update-elective
export const UPDATE_ELECTIVE_DOC = gql`
  mutation UpdateElective($input: UpdateElectiveInput!) {
    updateElective(input: $input) {
      id
    }
  }
`;