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

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

model User {
  id                  String               @id @default(cuid())
  email               String               @unique
  username            String               @unique
  passwordHash        String
  telegramChatId      String?              @unique @map("telegram_chat_id")
  isActive            Boolean              @default(true)
  createdAt           DateTime             @default(now())
  updatedAt           DateTime             @updatedAt
  lastLoginAt         DateTime?
  role                UserRole             @default(STUDENT)
  timezone            String               @default("UTC") @map("timezone")
  exerciseAttempts    ExerciseAttempt[]
  notifications       Notification[]
  passwordResetTokens PasswordResetToken[]
  progress            Progress[]
  rankings            Ranking[]
  refreshTokens       RefreshToken[]
  userAchievements    UserAchievement[]

  @@index([email])
  @@index([username])
  @@index([isActive])
  @@index([role])
  @@map("users")
}

model PasswordResetToken {
  id        String   @id @default(uuid())
  token     String   @unique
  userId    String
  expiresAt DateTime
  used      Boolean  @default(false)
  createdAt DateTime @default(now())
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([token])
  @@index([userId])
  @@index([expiresAt])
  @@map("password_reset_tokens")
}

model RefreshToken {
  id        String   @id @default(uuid())
  token     String   @unique
  userId    String
  expiresAt DateTime
  createdAt DateTime @default(now())
  revoked   Boolean  @default(false)
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId])
  @@index([token])
  @@index([expiresAt])
  @@index([revoked])
  @@map("refresh_tokens")
}

model ExerciseAttempt {
  id               String        @id @default(cuid())
  userId           String
  exerciseId       String
  userAnswer       String
  status           AttemptStatus
  pointsEarned     Int           @default(0)
  timeSpentSeconds Int
  hintsUsed        Int           @default(0)
  feedback         String?
  createdAt        DateTime      @default(now())
  attemptNumber    Int
  isPerfect        Boolean       @default(false)
  skipped          Boolean       @default(false)
  earnedAt         DateTime      @default(now())
  exercises        Exercise      @relation(fields: [exerciseId], references: [id], onDelete: Cascade)
  user             User          @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([userId, exerciseId, attemptNumber])
  @@index([userId])
  @@index([exerciseId])
  @@index([createdAt])
  @@index([earnedAt])
  @@index([status])
  @@index([userId, exerciseId])
  @@map("exercise_attempts")
}

model Notification {
  id            String             @id @default(cuid())
  type          NotificationType
  title         String
  message       String
  user_id       String
  status        NotificationStatus @default(PENDING)
  priority      Int                @default(0)
  metadata      Json?
  attempts      Int                @default(0)
  lastAttemptAt DateTime?
  sentAt        DateTime?
  errorMessage  String?
  createdAt     DateTime           @default(now())
  updatedAt     DateTime           @updatedAt
  users         User               @relation(fields: [user_id], references: [id], onDelete: Cascade)

  @@index([createdAt])
  @@index([priority])
  @@index([status])
  @@index([type])
  @@index([user_id])
  @@map("notifications")
}

model Progress {
  id                 String    @id @default(cuid())
  userId             String
  moduleId           String
  exercisesCompleted Int       @default(0)
  totalExercises     Int       @default(0)
  points             Int       @default(0)
  percentage         Float     @default(0)
  isStarted          Boolean   @default(false)
  isCompleted        Boolean   @default(false)
  startedAt          DateTime?
  completedAt        DateTime?
  lastAccessedAt     DateTime?
  createdAt          DateTime  @default(now())
  updatedAt          DateTime  @updatedAt
  averageScore       Float?
  totalTimeSpent     Int       @default(0)
  perfectExercises   Int       @default(0)
  attemptsCount      Int       @default(0)
  modules            modules   @relation(fields: [moduleId], references: [id], onDelete: Cascade)
  user               User      @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([userId, moduleId])
  @@index([userId])
  @@index([moduleId])
  @@index([isCompleted])
  @@index([points])
  @@map("progress")
}

model Ranking {
  id                   String   @id @default(cuid())
  userId               String
  moduleId             String?
  position             Int
  points               Int      @default(0)
  exercisesCompleted   Int      @default(0)
  streak               Int      @default(0)
  lastUpdated          DateTime @default(now())
  perfectExercises     Int      @default(0)
  averageScore         Float?
  totalAttempts        Int      @default(0)
  achievementsUnlocked Int      @default(0)
  longestStreak        Int      @default(0)
  modules              modules? @relation(fields: [moduleId], references: [id], onDelete: Cascade)
  user                 User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([userId, moduleId])
  @@index([points])
  @@index([moduleId])
  @@index([position])
  @@index([streak])
  @@map("rankings")
}

model Achievement {
  id               String              @id @default(cuid())
  code             String              @unique
  name             String
  description      String
  category         AchievementCategory
  rarity           AchievementRarity
  icon             String
  requirementType  RequirementType
  requirementValue Int
  points           Int                 @default(0)
  metadata         Json?
  isActive         Boolean             @default(true)
  createdAt        DateTime            @default(now())
  updatedAt        DateTime            @updatedAt
  userAchievements UserAchievement[]

  @@index([category])
  @@index([code])
  @@index([isActive])
  @@index([rarity])
  @@map("achievements")
}

model UserAchievement {
  id            String      @id @default(cuid())
  userId        String
  achievementId String
  progress      Int         @default(0)
  unlockedAt    DateTime?
  metadata      Json?
  createdAt     DateTime    @default(now())
  updatedAt     DateTime    @updatedAt
  achievement   Achievement @relation(fields: [achievementId], references: [id], onDelete: Cascade)
  user          User        @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([userId, achievementId])
  @@index([userId])
  @@index([achievementId])
  @@index([unlockedAt])
  @@map("user_achievements")
}

model Exercise {
  id                    String             @id @default(cuid())
  moduleId              String
  topicId               String?
  type                  ExerciseType
  difficulty            ExerciseDifficulty
  order                 Int
  statement             String
  correctAnswer         String
  solutionSteps         Json?
  formulas              Json?
  hints                 Json?
  isAIGenerated         Boolean            @default(false)
  isPublished           Boolean            @default(false)
  points                Int                @default(10)
  timeLimitSeconds      Int?
  createdAt             DateTime           @default(now())
  updatedAt             DateTime           @updatedAt
  multipleChoiceOptions Json?
  proofRequirements     Json?
  calculationSteps      Json?
  exercise_attempts     ExerciseAttempt[]
  modules               modules            @relation(fields: [moduleId], references: [id], onDelete: Cascade)
  topics                topics?            @relation(fields: [topicId], references: [id])

  @@unique([moduleId, order])
  @@index([difficulty])
  @@index([type])
  @@index([isAIGenerated])
  @@index([isPublished])
  @@index([moduleId])
  @@index([topicId])
  @@map("exercises")
}

model SystemConfig {
  id            String   @id @default(cuid())
  key           String   @unique
  value         String
  description   String?
  category      String?
  isPublic      Boolean  @default(false)
  isEncrypted   Boolean  @default(false)
  dataType      String   @default("string")
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt
  createdBy     String?
  updatedBy     String?
  changeHistory Json?

  @@index([category])
  @@index([isPublic])
  @@map("system_config")
}

model modules {
  id              String             @id
  name            String
  description     String
  type            ModuleType
  order           Int
  isPublished     Boolean            @default(false)
  createdAt       DateTime           @default(now())
  updatedAt       DateTime           @updatedAt
  introduction    String?
  examples        Json?
  exercisesData   Json?
  answers         Json?
  estimatedHours  Int?               @default(0)
  difficultyLevel ExerciseDifficulty @default(INTERMEDIATE)
  totalExercises  Int                @default(0)
  exercises       Exercise[]
  progress        Progress[]
  rankings        Ranking[]
  topics          topics[]

  @@unique([type, order])
  @@index([isPublished])
  @@index([order])
  @@index([type])
}

model processed_pdfs {
  id                      String     @id
  file_name               String     @unique
  original_path           String
  type                    PdfType
  topicType               TopicType?
  is_processed            Boolean    @default(false)
  processing_started_at   DateTime?
  processing_completed_at DateTime?
  errorMessage            String?
  extractedText           Json?
  exercisesDetected       Json?
  formulasExtracted       Json?
  metadata                Json?
  totalPages              Int?
  processingVersion       String?
  checksum                String?
  createdAt               DateTime   @default(now())
  updatedAt               DateTime   @updatedAt

  @@index([file_name])
  @@index([is_processed])
  @@index([topicType])
  @@index([type])
}

model topics {
  id             String     @id
  moduleId       String
  name           String
  type           TopicType
  order          Int
  description    String?
  createdAt      DateTime   @default(now())
  updatedAt      DateTime   @updatedAt
  theoryContent  Json?
  formulas       Json?
  keyPoints      Json?
  commonMistakes Json?
  exercises      Exercise[]
  modules        modules    @relation(fields: [moduleId], references: [id], onDelete: Cascade)

  @@unique([moduleId, order])
  @@index([moduleId])
  @@index([type])
}

enum UserRole {
  STUDENT
  TEACHER
  ADMIN
}

enum AchievementCategory {
  EXERCISES
  MODULES
  STREAKS
  RANKING
  SPECIAL
}

enum AchievementRarity {
  COMMON
  RARE
  EPIC
  LEGENDARY
}

enum AttemptStatus {
  CORRECT
  INCORRECT
  PARTIAL
  PENDING
}

enum ExerciseDifficulty {
  BASIC
  INTERMEDIATE
  ADVANCED
  EXPERT
}

enum ExerciseType {
  MULTIPLE_CHOICE
  OPEN_RESPONSE
  CALCULATION
  PROOF
  TRUE_FALSE
}

enum ModuleType {
  FUNDAMENTOS
  SISTEMAS
  APLICACIONES
}

enum NotificationStatus {
  PENDING
  SENT
  FAILED
}

enum NotificationType {
  NEW_USER
  EXERCISE_COMPLETED
  MODULE_COMPLETED
  ACHIEVEMENT_UNLOCKED
  SYSTEM_ERROR
  DAILY_SUMMARY
  RANKING_CHANGED
}

enum PdfType {
  TEXTBOOK
  PRACTICE
  PRACTICE_ANSWERS
  EXAM
  ADDITIONAL_MATERIAL
}

enum RequirementType {
  EXERCISES_COMPLETED
  MODULES_COMPLETED
  PERFECT_SCORES
  STREAK_DAYS
  RANKING_POSITION
  EXERCISES_WITHOUT_HINTS
  EARLY_BIRD
  NIGHT_OWL
  PERFECT_MODULE
}

enum TopicType {
  VECTORES
  MATRICES
  SISTEMAS
  ESPACIOS_VECTORIALES
  PROGRAMACION_LINEAL
}