// Prisma 数据模型定义（TodoList）

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

datasource db {
  provider = "postgresql"
}

enum UserStatus {
  ACTIVE
  DISABLED
  BANNED
}

enum AuthProvider {
  EMAIL
  GITHUB
  QQ
  WECHAT
}

enum TaskPriority {
  LOW
  MEDIUM
  HIGH
  URGENT
}

enum TaskStatus {
  TODO
  IN_PROGRESS
  DONE
  ARCHIVED
}

enum AttachmentType {
  IMAGE
  VIDEO
  FILE
  LINK
}

model User {
  id                    String            @id @default(cuid())
  email                 String            @unique
  nickname              String?
  avatarUrl             String?
  status                UserStatus        @default(ACTIVE)
  defaultStorageQuotaMb Int               @default(100)
  usedStorageBytes      BigInt            @default(0)
  createdAt             DateTime          @default(now())
  updatedAt             DateTime          @updatedAt
  identities            AuthIdentity[]
  refreshTokens         RefreshToken[]
  security              UserSecurity?
  tasks                 Task[]
  tags                  Tag[]
  attachments           Attachment[]
  taskActivityLogs      TaskActivityLog[]
  syncOperations        SyncOperation[]
  syncCursors           SyncCursor[]
  taskTombstones        TaskTombstone[]

  @@map("users")
}

model AuthIdentity {
  id             String       @id @default(cuid())
  userId         String
  provider       AuthProvider
  providerUserId String
  email          String?
  createdAt      DateTime     @default(now())
  updatedAt      DateTime     @updatedAt
  user           User         @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([provider, providerUserId])
  @@index([userId])
  @@map("auth_identities")
}

model UserSecurity {
  id               String   @id @default(cuid())
  userId           String   @unique
  twoFactorEnabled Boolean  @default(false)
  twoFactorSecret  String?
  recoveryCodes    String[] @default([])
  createdAt        DateTime @default(now())
  updatedAt        DateTime @updatedAt
  user             User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@map("user_security")
}

model RefreshToken {
  id        String    @id @default(cuid())
  userId    String
  tokenHash String    @unique
  deviceId  String?
  expiresAt DateTime
  revokedAt DateTime?
  createdAt DateTime  @default(now())
  user      User      @relation(fields: [userId], references: [id], onDelete: Cascade)

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

model Task {
  id           String            @id @default(cuid())
  userId       String
  title        String
  contentJson  Json?
  contentText  String?
  priority     TaskPriority      @default(MEDIUM)
  status       TaskStatus        @default(TODO)
  ddl          DateTime?
  completedAt  DateTime?
  version      Int               @default(1)
  createdAt    DateTime          @default(now())
  updatedAt    DateTime          @updatedAt
  user         User              @relation(fields: [userId], references: [id], onDelete: Cascade)
  taskTags     TaskTag[]
  attachments  Attachment[]
  activityLogs TaskActivityLog[]

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

model Tag {
  id        String    @id @default(cuid())
  userId    String
  name      String
  color     String?
  createdAt DateTime  @default(now())
  updatedAt DateTime  @updatedAt
  user      User      @relation(fields: [userId], references: [id], onDelete: Cascade)
  taskTags  TaskTag[]

  @@unique([userId, name])
  @@index([userId])
  @@map("tags")
}

model TaskTag {
  taskId    String
  tagId     String
  createdAt DateTime @default(now())
  task      Task     @relation(fields: [taskId], references: [id], onDelete: Cascade)
  tag       Tag      @relation(fields: [tagId], references: [id], onDelete: Cascade)

  @@id([taskId, tagId])
  @@index([tagId])
  @@map("task_tags")
}

model Attachment {
  id         String         @id @default(cuid())
  userId     String
  taskId     String?
  type       AttachmentType
  url        String
  mimeType   String?
  fileName   String?
  fileSize   Int
  width      Int?
  height     Int?
  durationMs Int?
  checksum   String?
  createdAt  DateTime       @default(now())
  updatedAt  DateTime       @updatedAt
  user       User           @relation(fields: [userId], references: [id], onDelete: Cascade)
  task       Task?          @relation(fields: [taskId], references: [id], onDelete: SetNull)

  @@index([userId])
  @@index([taskId])
  @@map("attachments")
}

model TaskActivityLog {
  id        String   @id @default(cuid())
  userId    String
  taskId    String
  action    String
  payload   Json?
  createdAt DateTime @default(now())
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  task      Task     @relation(fields: [taskId], references: [id], onDelete: Cascade)

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

model SyncOperation {
  id         String   @id @default(cuid())
  opId       String   @unique
  userId     String
  deviceId   String
  entityType String
  entityId   String
  action     String
  payload    Json?
  clientTs   DateTime
  serverTs   DateTime @default(now())
  user       User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId, deviceId, serverTs])
  @@index([userId, entityType, entityId])
  @@map("sync_operations")
}

model SyncCursor {
  id                    String    @id @default(cuid())
  userId                String
  deviceId              String
  lastPulledAt          DateTime?
  lastOperationServerTs DateTime?
  createdAt             DateTime  @default(now())
  updatedAt             DateTime  @updatedAt
  user                  User      @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([userId, deviceId])
  @@map("sync_cursors")
}

model TaskTombstone {
  id         String   @id @default(cuid())
  taskId     String   @unique
  userId     String
  deletedAt  DateTime @default(now())
  deleteOpId String?
  user       User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId, deletedAt])
  @@map("task_tombstones")
}