generator client {
  provider = "prisma-client"
  output   = "../src/generated/prisma"
}

datasource db {
  provider = "postgresql"
}

// ─────────────────────────────────────────────
// Better Auth core tables
// ─────────────────────────────────────────────

model User {
  id            String    @id @default(cuid())
  name          String
  email         String    @unique
  emailVerified Boolean   @default(false)
  image         String?
  role          String    @default("student") // student | curator | admin
  banned        Boolean?  @default(false)
  banReason     String?
  banExpires    DateTime?
  createdAt     DateTime  @default(now())
  updatedAt     DateTime  @updatedAt

  sessions        Session[]
  accounts        Account[]
  enrollments     CourseEnrollment[]
  progress        LessonProgress[]
  submissions     HomeworkSubmission[]
  comments        LessonComment[]
  feedbacks       HomeworkFeedback[]
  accessLogs      AccessLog[] @relation("AccessLogUser")
  adminAccessLogs AccessLog[] @relation("AccessLogAdmin")
}

model Session {
  id        String   @id @default(cuid())
  userId    String
  token     String   @unique
  expiresAt DateTime
  ipAddress String?
  userAgent String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
}

model Account {
  id                    String    @id @default(cuid())
  userId                String
  accountId             String
  providerId            String
  accessToken           String?
  refreshToken          String?
  idToken               String?
  accessTokenExpiresAt  DateTime?
  refreshTokenExpiresAt DateTime?
  scope                 String?
  password              String?
  createdAt             DateTime  @default(now())
  updatedAt             DateTime  @updatedAt

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
}

model Verification {
  id         String   @id @default(cuid())
  identifier String
  value      String
  expiresAt  DateTime
  createdAt  DateTime @default(now())
  updatedAt  DateTime @updatedAt
}

// ─────────────────────────────────────────────
// LMS core tables
// ─────────────────────────────────────────────

model Category {
  id        String   @id @default(cuid())
  title     String
  slug      String   @unique
  order     Int      @default(0)
  createdAt DateTime @default(now())

  courses Course[]
}

model Course {
  id          String   @id @default(cuid())
  slug        String   @unique
  title       String
  description String?
  coverImage  String?
  published   Boolean  @default(false)
  order       Int      @default(0)
  categoryId  String?
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  category    Category?          @relation(fields: [categoryId], references: [id], onDelete: SetNull)
  modules     Module[]
  enrollments CourseEnrollment[]
  accessLogs  AccessLog[]
}

model Module {
  id          String   @id @default(cuid())
  courseId    String
  title       String
  description String?
  order       Int      @default(0)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

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

model Lesson {
  id          String   @id @default(cuid())
  moduleId    String
  title       String
  content     Json?
  kinescopeId String?
  order       Int      @default(0)
  published   Boolean  @default(false)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  module   Module           @relation(fields: [moduleId], references: [id], onDelete: Cascade)
  progress LessonProgress[]
  quiz     Quiz?
  homework Homework?
  comments LessonComment[]
  files    LessonFile[]
}

model LessonFile {
  id        String   @id @default(cuid())
  lessonId  String
  name      String
  url       String
  size      Int
  createdAt DateTime @default(now())

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

model CourseEnrollment {
  userId     String
  courseId   String
  enrolledAt DateTime  @default(now())
  expiresAt  DateTime?

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

  @@id([userId, courseId])
}

model AccessLog {
  id          String   @id @default(cuid())
  courseId    String
  userId      String
  action      String   // "granted" | "revoked"
  method      String   @default("manual")
  grantedById String?
  note        String?
  createdAt   DateTime @default(now())

  course      Course @relation(fields: [courseId], references: [id], onDelete: Cascade)
  user        User   @relation("AccessLogUser", fields: [userId], references: [id], onDelete: Cascade)
  grantedBy   User?  @relation("AccessLogAdmin", fields: [grantedById], references: [id], onDelete: SetNull)
}

model LessonProgress {
  userId      String
  lessonId    String
  completedAt DateTime @default(now())

  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
  lesson Lesson @relation(fields: [lessonId], references: [id], onDelete: Cascade)

  @@id([userId, lessonId])
}

// ─────────────────────────────────────────────
// Quizzes
// ─────────────────────────────────────────────

model Quiz {
  id          String   @id @default(cuid())
  lessonId    String   @unique
  showAnswers Boolean  @default(true)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  lesson    Lesson         @relation(fields: [lessonId], references: [id], onDelete: Cascade)
  questions QuizQuestion[]
  attempts  QuizAttempt[]
}

model QuizQuestion {
  id     String           @id @default(cuid())
  quizId String
  text   String
  type   QuizQuestionType
  order  Int              @default(0)

  quiz    Quiz         @relation(fields: [quizId], references: [id], onDelete: Cascade)
  options QuizOption[]
}

model QuizOption {
  id         String  @id @default(cuid())
  questionId String
  text       String
  isCorrect  Boolean @default(false)
  order      Int     @default(0)

  question QuizQuestion @relation(fields: [questionId], references: [id], onDelete: Cascade)
}

model QuizAttempt {
  id          String   @id @default(cuid())
  userId      String
  quizId      String
  score       Int
  answers     Json
  completedAt DateTime @default(now())

  quiz Quiz @relation(fields: [quizId], references: [id], onDelete: Cascade)
}

enum QuizQuestionType {
  SINGLE
  MULTIPLE
  TEXT
}

// ─────────────────────────────────────────────
// Homework
// ─────────────────────────────────────────────

model Homework {
  id          String   @id @default(cuid())
  lessonId    String   @unique
  description String
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  lesson      Lesson               @relation(fields: [lessonId], references: [id], onDelete: Cascade)
  submissions HomeworkSubmission[]
}

model HomeworkSubmission {
  id         String   @id @default(cuid())
  homeworkId String
  userId     String
  text       String?
  files      Json?
  submittedAt DateTime @default(now())

  homework  Homework           @relation(fields: [homeworkId], references: [id], onDelete: Cascade)
  user      User               @relation(fields: [userId], references: [id], onDelete: Cascade)
  feedbacks HomeworkFeedback[]
}

model HomeworkFeedback {
  id           String   @id @default(cuid())
  submissionId String
  curatorId    String
  text         String
  createdAt    DateTime @default(now())

  submission HomeworkSubmission @relation(fields: [submissionId], references: [id], onDelete: Cascade)
  curator    User               @relation(fields: [curatorId], references: [id], onDelete: Cascade)
}

// ─────────────────────────────────────────────
// Comments
// ─────────────────────────────────────────────

model LessonComment {
  id        String   @id @default(cuid())
  lessonId  String
  userId    String
  text      String
  deleted   Boolean  @default(false)
  createdAt DateTime @default(now())

  lesson Lesson @relation(fields: [lessonId], references: [id], onDelete: Cascade)
  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
}

// ─────────────────────────────────────────────
// Platform Settings (key-value store)
// ─────────────────────────────────────────────

model Settings {
  key       String   @id
  value     String   @db.Text
  updatedAt DateTime @updatedAt
}