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

datasource db {
  provider = "sqlite"
}

enum TaskType {
  attention_training
  emotion_awareness
  stress_regulation
  cognitive_clarity
  integration
}

enum TaskStatus {
  pending
  completed
  expired
}

enum RewardEventType {
  daily_completion
  streak_3
  streak_7
  streak_14
  streak_30
  stage_up
  first_session
}

model User {
  id           String    @id @default(uuid())
  email        String    @unique
  passwordHash String?   @map("password_hash")
  createdAt    DateTime  @default(now()) @map("created_at")

  state         UserState?     @relation("UserState")
  sessions      Session[]
  tasks         Task[]
  rewardEvents  RewardEvent[]
  weeklySummary WeeklySummary?

  @@map("users")
}

model UserState {
  id                      String   @id @default(uuid())
  userId                  String   @unique @map("user_id")
  attentionLevel          Int      @default(50) @map("attention_level")
  emotionStability        Int      @default(50) @map("emotion_stability")
  stressLevel             Int      @default(50) @map("stress_level")
  practiceStage           Int      @default(0) @map("practice_stage")
  consistencyScore        Int      @default(0) @map("consistency_score")
  streakDays              Int      @default(0) @map("streak_days")
  totalSessionsCompleted  Int      @default(0) @map("total_sessions_completed")
  onboardingCompleted     Boolean  @default(false) @map("onboarding_completed")
  lastSessionDate         DateTime? @map("last_session_date")
  updatedAt               DateTime @updatedAt @map("updated_at")

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

  @@map("user_states")
}

model Session {
  id              String    @id @default(uuid())
  userId          String    @map("user_id")
  taskType        TaskType  @map("task_type")
  taskDescription String    @map("task_description")
  durationSeconds Int       @default(300) @map("duration_seconds")
  completed       Boolean   @default(false)
  focusScore      Int?      @map("focus_score")
  emotionScore    Int?      @map("emotion_score")
  notes           String?
  createdAt       DateTime  @default(now()) @map("created_at")

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

  @@index([userId, createdAt])
  @@map("sessions")
}

model Task {
  id          String     @id @default(uuid())
  userId      String     @map("user_id")
  type        TaskType
  difficulty  Int        @default(1)
  duration    Int        @default(5)
  description String
  reasonJson  String     @default("{}") @map("reason_json")
  status      TaskStatus @default(pending)
  createdAt   DateTime   @default(now()) @map("created_at")

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

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

model RewardEvent {
  id        String          @id @default(uuid())
  userId    String          @map("user_id")
  type      RewardEventType
  message   String
  createdAt DateTime        @default(now()) @map("created_at")

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

  @@index([userId, createdAt])
  @@map("reward_events")
}

model WeeklySummary {
  id        String    @id @default(uuid())
  userId    String    @unique @map("user_id")
  summary   String?
  weekStart DateTime  @map("week_start")
  createdAt DateTime  @default(now()) @map("created_at")

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

  @@map("weekly_summaries")
}