// prisma/schema-v2.prisma - 重构版数据模型
// 创建时间：2026-02-27
// 基于设计文档：21-数据模型重构设计.md
//
// 迁移说明：
// 1. 本文件为新版数据模型，与原 schema.prisma 共存
// 2. 采用渐进式迁移策略，保留旧表以确保向后兼容
// 3. 迁移完成后可将旧表标记为废弃

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "sqlite"
  url      = env("DATABASE_URL")
}

// ==================== 主题字典（新增） ====================

model Theme {
  id              Int       @id @default(autoincrement())

  name            String    @unique
  description     String?

  sortOrder       Int       @default(0) @map("sort_order")
  status          String    @default("ACTIVE") // ACTIVE, ARCHIVED

  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

  courses         Course[]

  @@index([sortOrder])
  @@map("themes")
}

// ==================== 课程套餐（新增） ====================

model CoursePackage {
  id              Int       @id @default(autoincrement())

  name            String
  description     String?

  price           Int       @default(0)
  discountPrice   Int?      @map("discount_price")
  discountType    String?   @map("discount_type")

  gradeLevels     String    @default("[]") @map("grade_levels")

  status          String    @default("DRAFT")

  submittedAt     DateTime? @map("submitted_at")
  submittedBy     Int?      @map("submitted_by")
  reviewedAt      DateTime? @map("reviewed_at")
  reviewedBy      Int?      @map("reviewed_by")
  reviewComment   String?   @map("review_comment")

  courseCount     Int       @default(0) @map("course_count")
  tenantCount     Int       @default(0) @map("tenant_count")

  createdBy       Int?      @map("created_by")

  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")
  publishedAt     DateTime? @map("published_at")

  courses         CoursePackageCourse[]
  tenantPackages  TenantPackage[]

  @@index([status])
  @@map("course_packages")
}

// ==================== 套餐-课程包关联（新增） ====================

model CoursePackageCourse {
  id              Int       @id @default(autoincrement())

  packageId       Int       @map("package_id")
  courseId        Int       @map("course_id")

  gradeLevel      String    @map("grade_level")
  sortOrder       Int       @default(0) @map("sort_order")

  createdAt       DateTime  @default(now()) @map("created_at")

  package         CoursePackage @relation(fields: [packageId], references: [id], onDelete: Cascade)
  course          Course        @relation(fields: [courseId], references: [id], onDelete: Cascade)

  @@unique([packageId, courseId])
  @@index([packageId, gradeLevel])
  @@map("course_package_courses")
}

// ==================== 租户-套餐授权（新增） ====================

model TenantPackage {
  id              Int       @id @default(autoincrement())

  tenantId        Int       @map("tenant_id")
  packageId       Int       @map("package_id")

  startDate       String    @map("start_date")
  endDate         String    @map("end_date")

  status          String    @default("ACTIVE")

  pricePaid       Int       @default(0) @map("price_paid")

  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

  tenant          Tenant         @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  package         CoursePackage  @relation(fields: [packageId], references: [id], onDelete: Cascade)

  @@unique([tenantId, packageId])
  @@index([tenantId, status])
  @@map("tenant_packages")
}

// ==================== 租户 ====================

model Tenant {
  id               Int         @id @default(autoincrement())
  name             String
  loginAccount     String?     @unique @map("login_account")
  passwordHash     String?     @map("password_hash")
  address          String?
  contactPerson    String?     @map("contact_person")
  contactPhone     String?     @map("contact_phone")
  logoUrl          String?     @map("logo_url")

  packageType      String      @default("STANDARD") @map("package_type")
  teacherQuota     Int         @default(20) @map("teacher_quota")
  studentQuota     Int         @default(200) @map("student_quota")
  storageQuota     BigInt      @default(5368709120) @map("storage_quota")

  startDate        String      @map("start_date")
  expireDate       String      @map("expire_date")

  teacherCount     Int         @default(0) @map("teacher_count")
  studentCount     Int         @default(0) @map("student_count")
  storageUsed      BigInt      @default(0) @map("storage_used")

  status           String      @default("ACTIVE")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  teachers         Teacher[]
  students         Student[]
  classes          Class[]
  lessons          Lesson[]
  tenantCourses    TenantCourse[]
  growthRecords    GrowthRecord[]
  tasks            Task[]
  taskTemplates    TaskTemplate[]
  parents          Parent[]
  notifications    Notification[]
  settings         SystemSettings?
  schedulePlans    SchedulePlan[]
  scheduleTemplates ScheduleTemplate[]
  operationLogs    OperationLog[]

  // 新增关联
  packages         TenantPackage[]
  schoolCourses    SchoolCourse[]

  @@map("tenants")
}

// ==================== 教师 ====================

model Teacher {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  name             String
  phone            String
  email            String?

  loginAccount     String      @unique @map("login_account")
  passwordHash     String      @map("password_hash")
  classIds         String?     @default("[]") @map("class_ids")

  status           String      @default("ACTIVE")

  lessonCount      Int         @default(0) @map("lesson_count")
  feedbackCount    Int         @default(0) @map("feedback_count")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")
  lastLoginAt      DateTime?   @map("last_login_at")

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  classes          Class[]
  lessons          Lesson[]
  feedbacks        LessonFeedback[]
  classTeachers    ClassTeacher[]
  schedulePlans    SchedulePlan[]
  scheduleTemplates ScheduleTemplate[]

  @@map("teachers")
}

// ==================== 班级 ====================

model Class {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  name             String
  grade            String

  teacherId        Int?        @map("teacher_id")

  studentCount     Int         @default(0) @map("student_count")
  lessonCount      Int         @default(0) @map("lesson_count")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  teacher          Teacher?    @relation(fields: [teacherId], references: [id])
  students         Student[]
  lessons          Lesson[]
  growthRecords    GrowthRecord[]
  classTeachers    ClassTeacher[]
  studentHistory   StudentClassHistory[] @relation("ToClass")
  fromHistory      StudentClassHistory[] @relation("FromClass")
  schedulePlans    SchedulePlan[]
  scheduleTemplates ScheduleTemplate[]

  @@map("classes")
}

// ==================== 学生 ====================

model Student {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  classId          Int         @map("class_id")
  name             String
  gender           String?
  birthDate        DateTime?   @map("birth_date")
  parentPhone      String?     @map("parent_phone")
  parentName       String?     @map("parent_name")

  readingCount     Int         @default(0) @map("reading_count")
  lessonCount      Int         @default(0) @map("lesson_count")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  class            Class       @relation(fields: [classId], references: [id], onDelete: Cascade)
  records          StudentRecord[]
  growthRecords    GrowthRecord[]
  taskCompletions  TaskCompletion[]
  parents          ParentStudent[]
  classHistory     StudentClassHistory[]

  @@map("students")
}

// ==================== 课程包（重构） ====================

model Course {
  id               Int         @id @default(autoincrement())

  // 新增字段
  themeId          Int?        @map("theme_id")
  coreContent      String?     @map("core_content")

  introSummary     String?     @map("intro_summary")
  introHighlights  String?     @map("intro_highlights")
  introGoals       String?     @map("intro_goals")
  introSchedule    String?     @map("intro_schedule")
  introKeyPoints   String?     @map("intro_key_points")
  introMethods     String?     @map("intro_methods")
  introEvaluation  String?     @map("intro_evaluation")
  introNotes       String?     @map("intro_notes")

  scheduleRefData  String?     @map("schedule_ref_data")

  hasCollectiveLesson Boolean  @default(false) @map("has_collective_lesson")

  // 保留字段
  name             String
  description      String?

  pictureBookId    Int?        @map("picture_book_id")
  pictureBookName  String?     @map("picture_book_name")
  coverImagePath   String?     @map("cover_image_path")

  ebookPaths       String?     @map("ebook_paths")
  audioPaths       String?     @map("audio_paths")
  videoPaths       String?     @map("video_paths")
  otherResources   String?     @map("other_resources")

  pptPath          String?     @map("ppt_path")
  pptName          String?     @map("ppt_name")
  posterPaths      String?     @map("poster_paths")
  tools            String?     @map("tools")
  studentMaterials String?     @map("student_materials")

  lessonPlanData   String?     @map("lesson_plan_data")
  activitiesData   String?     @map("activities_data")
  assessmentData   String?     @map("assessment_data")

  gradeTags        String      @default("[]") @map("grade_tags")
  domainTags       String      @default("[]") @map("domain_tags")

  duration         Int         @default(25)

  status           String      @default("DRAFT")
  version          String      @default("1.0")

  submittedAt      DateTime?   @map("submitted_at")
  submittedBy      Int?        @map("submitted_by")
  reviewedAt       DateTime?   @map("reviewed_at")
  reviewedBy       Int?        @map("reviewed_by")
  reviewComment    String?     @map("review_comment")
  reviewChecklist  String?     @map("review_checklist")

  parentId         Int?        @map("parent_id")
  isLatest         Boolean     @default(true)

  usageCount       Int         @default(0) @map("usage_count")
  teacherCount     Int         @default(0) @map("teacher_count")
  avgRating        Float       @default(0) @map("avg_rating")

  createdBy        Int?        @map("created_by")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")
  publishedAt      DateTime?   @map("published_at")

  // 关联
  theme            Theme?      @relation(fields: [themeId], references: [id])

  packageCourses   CoursePackageCourse[]
  courseLessons    CourseLesson[]
  schoolCourses    SchoolCourse[]

  resources        CourseResource[]
  scripts          CourseScript[]
  activities       CourseActivity[]
  lessons          Lesson[]
  tenantCourses    TenantCourse[]
  versions         CourseVersion[]
  tasks            Task[]
  taskTemplates    TaskTemplate[]
  schedulePlans    SchedulePlan[]
  scheduleTemplates ScheduleTemplate[]

  @@index([themeId])
  @@index([status])
  @@map("courses")
}

// ==================== 课程（新增） ====================

model CourseLesson {
  id              Int       @id @default(autoincrement())

  courseId        Int       @map("course_id")

  lessonType      String    @map("lesson_type")
  name            String
  description     String?

  duration        Int       @default(25)

  videoPath       String?   @map("video_path")
  videoName       String?   @map("video_name")
  pptPath         String?   @map("ppt_path")
  pptName         String?   @map("ppt_name")
  pdfPath         String?   @map("pdf_path")
  pdfName         String?   @map("pdf_name")

  objectives      String?
  preparation     String?
  extension       String?
  reflection      String?

  assessmentData  String?   @map("assessment_data")

  useTemplate     Boolean   @default(false) @map("use_template")

  sortOrder       Int       @default(0) @map("sort_order")

  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

  course          Course        @relation(fields: [courseId], references: [id], onDelete: Cascade)
  steps           LessonStep[]

  @@unique([courseId, lessonType])
  @@index([courseId])
  @@map("course_lessons")
}

// ==================== 教学环节（新增） ====================

model LessonStep {
  id              Int       @id @default(autoincrement())

  lessonId        Int       @map("lesson_id")

  name            String
  content         String?

  duration        Int       @default(5)

  objective       String?

  resourceIds     String?   @map("resource_ids")

  sortOrder       Int       @default(0) @map("sort_order")

  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

  lesson          CourseLesson      @relation(fields: [lessonId], references: [id], onDelete: Cascade)
  stepResources   LessonStepResource[]

  @@index([lessonId])
  @@map("lesson_steps")
}

// ==================== 环节资源关联（新增） ====================

model LessonStepResource {
  id              Int       @id @default(autoincrement())

  stepId          Int       @map("step_id")
  resourceId      Int       @map("resource_id")

  sortOrder       Int       @default(0) @map("sort_order")

  createdAt       DateTime  @default(now()) @map("created_at")

  step            LessonStep     @relation(fields: [stepId], references: [id], onDelete: Cascade)
  resource        CourseResource @relation(fields: [resourceId], references: [id], onDelete: Cascade)

  @@unique([stepId, resourceId])
  @@map("lesson_step_resources")
}

// ==================== 校本课程包（新增） ====================

model SchoolCourse {
  id              Int       @id @default(autoincrement())

  tenantId        Int       @map("tenant_id")
  sourceCourseId  Int       @map("source_course_id")

  name            String
  description     String?

  createdBy       Int       @map("created_by")

  changesSummary  String?   @map("changes_summary")
  changesData     String?   @map("changes_data")

  usageCount      Int       @default(0) @map("usage_count")

  status          String    @default("ACTIVE")

  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

  tenant          Tenant    @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  sourceCourse    Course    @relation(fields: [sourceCourseId], references: [id])
  lessons         SchoolCourseLesson[]
  reservations    SchoolCourseReservation[]

  @@index([tenantId])
  @@index([sourceCourseId])
  @@map("school_courses")
}

// ==================== 校本课程（新增） ====================

model SchoolCourseLesson {
  id              Int       @id @default(autoincrement())

  schoolCourseId  Int       @map("school_course_id")
  sourceLessonId  Int       @map("source_lesson_id")

  lessonType      String    @map("lesson_type")

  objectives      String?
  preparation     String?
  extension       String?
  reflection      String?

  changeNote      String?   @map("change_note")

  stepsData       String?   @map("steps_data")

  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

  schoolCourse    SchoolCourse @relation(fields: [schoolCourseId], references: [id], onDelete: Cascade)

  @@unique([schoolCourseId, lessonType])
  @@map("school_course_lessons")
}

// ==================== 校本课程预约（新增） ====================

model SchoolCourseReservation {
  id              Int       @id @default(autoincrement())

  schoolCourseId  Int       @map("school_course_id")

  teacherId       Int       @map("teacher_id")
  classId         Int       @map("class_id")

  scheduledDate   String    @map("scheduled_date")
  scheduledTime   String?   @map("scheduled_time")

  status          String    @default("PENDING")

  note            String?

  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

  schoolCourse    SchoolCourse @relation(fields: [schoolCourseId], references: [id], onDelete: Cascade)

  @@index([schoolCourseId, scheduledDate])
  @@map("school_course_reservations")
}

// ==================== 课程资源 ====================

model CourseResource {
  id               Int         @id @default(autoincrement())
  courseId         Int         @map("course_id")
  resourceType     String      @map("resource_type")
  resourceName     String      @map("resource_name")
  fileUrl          String      @map("file_url")
  fileSize         Int?        @map("file_size")
  mimeType         String?     @map("mime_type")
  metadata         String?

  sortOrder        Int         @default(0) @map("sort_order")

  createdAt        DateTime    @default(now()) @map("created_at")

  course           Course      @relation(fields: [courseId], references: [id], onDelete: Cascade)
  stepResources    LessonStepResource[]

  @@map("course_resources")
}

// ==================== 课程脚本（废弃但保留） ====================

model CourseScript {
  id               Int         @id @default(autoincrement())
  courseId         Int         @map("course_id")
  stepIndex        Int         @map("step_index")
  stepName         String      @map("step_name")
  stepType         String      @map("step_type")

  duration         Int
  objective        String?
  teacherScript    String?     @map("teacher_script")
  interactionPoints String?    @map("interaction_points")

  resourceIds      String?     @map("resource_ids")

  sortOrder        Int         @default(0) @map("sort_order")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  course           Course      @relation(fields: [courseId], references: [id], onDelete: Cascade)
  pages            CourseScriptPage[]

  @@unique([courseId, stepIndex])
  @@map("course_scripts")
}

// ==================== 逐页配置（废弃但保留） ====================

model CourseScriptPage {
  id               Int         @id @default(autoincrement())
  scriptId         Int         @map("script_id")
  pageNumber       Int         @map("page_number")
  questions        String?
  interactionComponent String? @map("interaction_component")
  teacherNotes     String?     @map("teacher_notes")
  resourceIds      String?     @map("resource_ids")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  script           CourseScript @relation(fields: [scriptId], references: [id], onDelete: Cascade)

  @@unique([scriptId, pageNumber])
  @@map("course_script_pages")
}

// ==================== 延伸活动（废弃但保留） ====================

model CourseActivity {
  id               Int         @id @default(autoincrement())
  courseId         Int         @map("course_id")
  name             String

  domain           String?
  domainTagId      Int?        @map("domain_tag_id")
  activityType     String      @map("activity_type")
  duration         Int?

  onlineMaterials  String?     @map("online_materials")
  offlineMaterials String?
  activityGuide    String?
  objectives       String?

  sortOrder        Int         @default(0) @map("sort_order")

  createdAt        DateTime    @default(now()) @map("created_at")

  course           Course      @relation(fields: [courseId], references: [id], onDelete: Cascade)

  @@map("course_activities")
}

// ==================== 课程版本历史 ====================

model CourseVersion {
  id               Int         @id @default(autoincrement())
  courseId         Int         @map("course_id")
  version          String
  snapshotData     String
  changeLog        String?
  publishedAt      DateTime    @default(now()) @map("published_at")
  publishedBy      Int         @map("published_by")

  course           Course      @relation(fields: [courseId], references: [id], onDelete: Cascade)

  @@index([courseId])
  @@map("course_versions")
}

// ==================== 授课记录 ====================

model Lesson {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  teacherId        Int         @map("teacher_id")
  classId          Int         @map("class_id")
  courseId         Int         @map("course_id")
  schedulePlanId   Int?        @map("schedule_plan_id")

  plannedDatetime  DateTime?   @map("planned_datetime")
  startDatetime    DateTime?   @map("start_datetime")
  endDatetime      DateTime?   @map("end_datetime")
  actualDuration   Int?        @map("actual_duration")

  status           String      @default("PLANNED")

  overallRating    String?     @map("overall_rating")
  participationRating String?  @map("participation_rating")
  completionNote   String?     @map("completion_note")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  tenant           Tenant        @relation(fields: [tenantId], references: [id])
  teacher          Teacher       @relation(fields: [teacherId], references: [id])
  class            Class         @relation(fields: [classId], references: [id])
  course           Course        @relation(fields: [courseId], references: [id])
  schedulePlan     SchedulePlan? @relation(fields: [schedulePlanId], references: [id])
  feedbacks        LessonFeedback[]
  records          StudentRecord[]

  @@map("lessons")
}

// ==================== 课程反馈 ====================

model LessonFeedback {
  id               Int         @id @default(autoincrement())
  lessonId         Int         @map("lesson_id")
  teacherId        Int         @map("teacher_id")

  designQuality    Int?        @map("design_quality")
  participation    Int?
  goalAchievement  Int?        @map("goal_achievement")

  stepFeedbacks    String?     @map("step_feedbacks")

  pros             String?
  suggestions      String?

  activitiesDone   String?     @map("activities_done")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  lesson           Lesson      @relation(fields: [lessonId], references: [id], onDelete: Cascade)
  teacher          Teacher     @relation(fields: [teacherId], references: [id])

  @@unique([lessonId, teacherId])
  @@map("lesson_feedbacks")
}

// ==================== 学生测评记录 ====================

model StudentRecord {
  id               Int         @id @default(autoincrement())
  lessonId         Int         @map("lesson_id")
  studentId        Int         @map("student_id")

  focus            Int?
  participation    Int?
  interest         Int?
  understanding    Int?

  domainAchievements String?

  notes            String?

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  lesson           Lesson      @relation(fields: [lessonId], references: [id], onDelete: Cascade)
  student          Student     @relation(fields: [studentId], references: [id])

  @@unique([lessonId, studentId])
  @@map("student_records")
}

// ==================== 标签体系 ====================

model Tag {
  id               Int         @id @default(autoincrement())
  level            Int
  code             String      @unique
  name             String
  parentId         Int?        @map("parent_id")

  description      String?
  metadata         String?

  sortOrder        Int         @default(0) @map("sort_order")

  createdAt        DateTime    @default(now()) @map("created_at")

  @@map("tags")
}

// ==================== 租户课程授权 ====================

model TenantCourse {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  courseId         Int         @map("course_id")

  authorized       Boolean     @default(true)
  authorizedAt     DateTime?   @map("authorized_at")

  createdAt        DateTime    @default(now()) @map("created_at")

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  course           Course      @relation(fields: [courseId], references: [id], onDelete: Cascade)

  @@unique([tenantId, courseId])
  @@map("tenant_courses")
}

// ==================== 成长档案 ====================

model GrowthRecord {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  studentId        Int         @map("student_id")
  classId          Int?        @map("class_id")
  recordType       String      @map("record_type")
  title            String
  content          String?
  images           String?     @map("images")
  recordDate       DateTime    @map("record_date")
  createdBy        Int         @map("created_by")
  createdAt        DateTime    @default(now())
  updatedAt        DateTime    @updatedAt

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  student          Student     @relation(fields: [studentId], references: [id], onDelete: Cascade)
  class            Class?      @relation(fields: [classId], references: [id], onDelete: SetNull)

  @@index([tenantId, studentId])
  @@index([tenantId, classId])
  @@map("growth_records")
}

// ==================== 阅读任务 ====================

model Task {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  title            String
  description      String?
  taskType         String      @map("task_type")
  targetType       String      @map("target_type")
  relatedCourseId  Int?        @map("related_course_id")
  createdBy        Int         @map("created_by")
  startDate        DateTime    @map("start_date")
  endDate          DateTime    @map("end_date")
  status           String      @default("PUBLISHED")
  createdAt        DateTime    @default(now())
  updatedAt        DateTime    @updatedAt

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  course           Course?     @relation(fields: [relatedCourseId], references: [id], onDelete: SetNull)
  targets          TaskTarget[]
  completions      TaskCompletion[]

  @@index([tenantId, status])
  @@map("tasks")
}

model TaskTarget {
  id               Int         @id @default(autoincrement())
  taskId           Int         @map("task_id")
  classId          Int?        @map("class_id")
  studentId        Int?        @map("student_id")

  task             Task        @relation(fields: [taskId], references: [id], onDelete: Cascade)

  @@index([taskId, classId])
  @@index([taskId, studentId])
  @@map("task_targets")
}

model TaskCompletion {
  id               Int         @id @default(autoincrement())
  taskId           Int         @map("task_id")
  studentId        Int         @map("student_id")
  status           String      @default("PENDING")
  completedAt      DateTime?   @map("completed_at")
  feedback         String?
  parentFeedback   String?     @map("parent_feedback")
  createdAt        DateTime    @default(now())

  task             Task        @relation(fields: [taskId], references: [id], onDelete: Cascade)
  student          Student     @relation(fields: [studentId], references: [id], onDelete: Cascade)

  @@unique([taskId, studentId])
  @@map("task_completions")
}

// ==================== 任务模板 ====================

model TaskTemplate {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  name             String
  description      String?
  taskType         String      @map("task_type")
  relatedCourseId  Int?        @map("related_course_id")
  defaultDuration  Int         @default(7) @map("default_duration")
  isDefault        Boolean     @default(false) @map("is_default")
  status           String      @default("ACTIVE")
  createdBy        Int         @map("created_by")
  createdAt        DateTime    @default(now())
  updatedAt        DateTime    @updatedAt

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  course           Course?     @relation(fields: [relatedCourseId], references: [id], onDelete: SetNull)

  @@index([tenantId, status])
  @@map("task_templates")
}

// ==================== 资源库 ====================

model ResourceLibrary {
  id               Int         @id @default(autoincrement())
  name             String
  libraryType      String      @map("library_type")
  description      String?
  coverImage       String?     @map("cover_image")
  tenantId         Int?        @map("tenant_id")
  createdBy        Int         @map("created_by")
  status           String      @default("PUBLISHED")
  sortOrder        Int         @default(0) @map("sort_order")
  createdAt        DateTime    @default(now())
  updatedAt        DateTime    @updatedAt

  items            ResourceItem[]

  @@index([libraryType, status])
  @@map("resource_libraries")
}

model ResourceItem {
  id               Int         @id @default(autoincrement())
  libraryId        Int         @map("library_id")
  title            String
  description      String?
  fileType         String      @map("file_type")
  filePath         String      @map("file_path")
  fileSize         Int?        @map("file_size")
  tags             String?
  sortOrder        Int         @default(0) @map("sort_order")
  createdAt        DateTime    @default(now())

  library          ResourceLibrary @relation(fields: [libraryId], references: [id], onDelete: Cascade)

  @@index([libraryId])
  @@map("resource_items")
}

// ==================== 系统设置 ====================

model SystemSettings {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @unique @map("tenant_id")
  schoolName       String?     @map("school_name")
  schoolLogo       String?     @map("school_logo")
  address          String?
  notifyOnLesson   Boolean     @default(true) @map("notify_on_lesson")
  notifyOnTask     Boolean     @default(true) @map("notify_on_task")
  notifyOnGrowth   Boolean     @default(false) @map("notify_on_growth")
  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)

  @@map("system_settings")
}

// ==================== 家长 ====================

model Parent {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  name             String
  phone            String
  email            String?
  loginAccount     String      @unique @map("login_account")
  passwordHash     String      @map("password_hash")
  status           String      @default("ACTIVE")
  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")
  lastLoginAt      DateTime?   @map("last_login_at")

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  children         ParentStudent[]

  @@map("parents")
}

// ==================== 家长-学生关联 ====================

model ParentStudent {
  id               Int         @id @default(autoincrement())
  parentId         Int         @map("parent_id")
  studentId        Int         @map("student_id")
  relationship     String
  createdAt        DateTime    @default(now()) @map("created_at")

  parent           Parent      @relation(fields: [parentId], references: [id], onDelete: Cascade)
  student          Student     @relation(fields: [studentId], references: [id], onDelete: Cascade)

  @@unique([parentId, studentId])
  @@map("parent_students")
}

// ==================== 通知 ====================

model Notification {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  recipientType    String      @map("recipient_type")
  recipientId      Int         @map("recipient_id")
  title            String
  content          String
  notificationType String      @map("notification_type")
  relatedType      String?     @map("related_type")
  relatedId        Int?        @map("related_id")
  isRead           Boolean     @default(false) @map("is_read")
  readAt           DateTime?   @map("read_at")
  createdAt        DateTime    @default(now()) @map("created_at")

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)

  @@index([tenantId, recipientType, recipientId])
  @@map("notifications")
}

// ==================== 班级教师关联 ====================

model ClassTeacher {
  id               Int         @id @default(autoincrement())
  classId          Int         @map("class_id")
  teacherId        Int         @map("teacher_id")
  role             String      @default("MAIN")
  isPrimary        Boolean     @default(false)
  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  class            Class       @relation(fields: [classId], references: [id], onDelete: Cascade)
  teacher          Teacher     @relation(fields: [teacherId], references: [id], onDelete: Cascade)

  @@unique([classId, teacherId])
  @@map("class_teachers")
}

// ==================== 学生调班历史 ====================

model StudentClassHistory {
  id               Int         @id @default(autoincrement())
  studentId        Int         @map("student_id")
  fromClassId      Int?        @map("from_class_id")
  toClassId        Int         @map("to_class_id")
  reason           String?
  operatedBy       Int?        @map("operated_by")
  createdAt        DateTime    @default(now()) @map("created_at")

  student          Student     @relation(fields: [studentId], references: [id])
  fromClass        Class?      @relation("FromClass", fields: [fromClassId], references: [id])
  toClass          Class       @relation("ToClass", fields: [toClassId], references: [id])

  @@map("student_class_history")
}

// ==================== 排课计划 ====================

model SchedulePlan {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  classId          Int         @map("class_id")
  courseId         Int         @map("course_id")
  teacherId        Int?        @map("teacher_id")

  scheduledDate    DateTime?   @map("scheduled_date")
  scheduledTime    String?     @map("scheduled_time")
  weekDay          Int?        @map("week_day")

  repeatType       String      @default("NONE") @map("repeat_type")
  repeatEndDate    DateTime?   @map("repeat_end_date")

  source           String      @default("SCHOOL")
  createdBy        Int         @map("created_by")

  status           String      @default("ACTIVE")

  note             String?

  reminderSent     Boolean     @default(false) @map("reminder_sent")
  reminderSentAt   DateTime?   @map("reminder_sent_at")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  tenant           Tenant      @relation(fields: [tenantId], references: [id])
  class            Class       @relation(fields: [classId], references: [id])
  course           Course      @relation(fields: [courseId], references: [id])
  teacher          Teacher?    @relation(fields: [teacherId], references: [id])
  lessons          Lesson[]

  @@index([tenantId, classId])
  @@index([tenantId, teacherId])
  @@index([tenantId, scheduledDate])
  @@map("schedule_plans")
}

// ==================== 排课模板 ====================

model ScheduleTemplate {
  id               Int         @id @default(autoincrement())
  tenantId         Int         @map("tenant_id")
  name             String
  courseId         Int         @map("course_id")
  classId          Int?        @map("class_id")
  teacherId        Int?        @map("teacher_id")

  scheduledTime    String?     @map("scheduled_time")
  weekDay          Int?        @map("week_day")
  duration         Int         @default(25)

  isDefault        Boolean     @default(false) @map("is_default")

  createdAt        DateTime    @default(now()) @map("created_at")
  updatedAt        DateTime    @updatedAt @map("updated_at")

  tenant           Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  course           Course      @relation(fields: [courseId], references: [id])
  class            Class?      @relation(fields: [classId], references: [id])
  teacher          Teacher?    @relation(fields: [teacherId], references: [id])

  @@index([tenantId])
  @@index([tenantId, courseId])
  @@map("schedule_templates")
}

// ==================== 操作日志 ====================

model OperationLog {
  id               Int         @id @default(autoincrement())
  tenantId         Int?        @map("tenant_id")
  userId           Int         @map("user_id")
  userType         String      @map("user_type")
  action           String
  module           String
  description      String
  targetId         Int?        @map("target_id")
  oldValue         String?     @map("old_value")
  newValue         String?     @map("new_value")
  ipAddress        String?     @map("ip_address")
  userAgent        String?     @map("user_agent")
  createdAt        DateTime    @default(now()) @map("created_at")

  tenant           Tenant?     @relation(fields: [tenantId], references: [id], onDelete: SetNull)

  @@index([tenantId, userId])
  @@index([tenantId, createdAt])
  @@index([action, module])
  @@map("operation_logs")
}