// Prisma Schema for Paper Burner X
// 支持多租户系统、历史记录持久化、模型配置管理

generator client {
  provider      = "prisma-client-js"
  binaryTargets = ["native", "linux-musl-openssl-3.0.x"]
}

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

// ==================== 用户与认证 ====================

model User {
  id        String   @id @default(uuid())
  email     String   @unique
  password  String // bcrypt 加密
  name      String?
  role      Role     @default(USER)
  isActive  Boolean  @default(true)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  // 关联
  settings       UserSettings?
  documents      Document[]
  apiKeys        ApiKey[]
  glossaries     Glossary[]
  annotations    Annotation[]
  processedFiles ProcessedFile[]
  quota          UserQuota?
  chatMessages   ChatMessage[]
  references     Reference[]
  promptPool     PromptPool?

  @@index([email])
  @@map("users")
}

enum Role {
  USER
  ADMIN
}

// ==================== 用户设置 ====================

model UserSettings {
  id     String @id @default(uuid())
  userId String @unique
  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  // OCR 设置
  ocrProvider String? // 'mineru' | 'doc2x'
  ocrApiKey   String? @db.Text

  // 翻译设置
  translationModel         String? // 'deepseek' | 'gemini' | 'claude' | 'custom'
  targetLanguage           String  @default("chinese")
  customTargetLanguageName String?
  maxTokensPerChunk        Int     @default(2000)
  translationConcurrency   Int     @default(15)

  // 提示词设置
  defaultSystemPrompt       String? @db.Text
  defaultUserPromptTemplate String? @db.Text
  useCustomPrompts          Boolean @default(false)

  // 其他设置
  enableGlossary      Boolean  @default(false)
  batchModeEnabled    Boolean  @default(false)
  batchModeTemplate   String?
  batchModeFormats    String[] // ['original', 'markdown', 'pdf']
  batchModeZipEnabled Boolean  @default(false)

  // 扩展配置（JSON 字段）
  ocrConfig            Json? // OCR 引擎和详细配置
  academicSearchConfig Json? // 学术搜索配置
  uiLayoutConfig       Json? // UI 布局配置

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@map("user_settings")
}

// ==================== API Keys 管理 ====================

model ApiKey {
  id     String @id @default(uuid())
  userId String
  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  provider String // 'mistral' | 'deepseek' | 'gemini' | 'claude' | 'tongyi' | 'volcano' | 'custom_source_xxx'
  keyValue String    @db.Text // 加密存储
  remark   String?
  status   KeyStatus @default(UNTESTED)
  order    Int       @default(0)

  lastUsedAt DateTime?
  createdAt  DateTime  @default(now())
  updatedAt  DateTime  @updatedAt

  @@index([userId, provider])
  @@map("api_keys")
}

enum KeyStatus {
  UNTESTED
  VALID
  INVALID
  TESTING
}

// ==================== 自定义模型源站配置 ====================

model CustomSourceSite {
  id     String  @id @default(uuid())
  userId String? // null = 管理员全局配置

  displayName     String
  apiBaseUrl      String
  modelId         String?
  availableModels String[] // JSON array
  requestFormat   String   @default("openai") // 'openai' | 'anthropic' | 'custom'
  temperature     Float    @default(0.5)
  maxTokens       Int      @default(8000)
  endpointMode    String   @default("auto")

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([userId])
  @@map("custom_source_sites")
}

// ==================== 文档处理历史 ====================

model Document {
  id     String @id @default(uuid())
  userId String
  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  // 基本信息
  fileName String
  fileSize Int?
  fileType String
  filePath String? // 如果启用文件上传存储

  // 处理状态
  status DocStatus @default(PENDING)

  // OCR 结果
  ocrProvider String?
  ocrText     String? @db.Text
  ocrMetadata Json?

  // 翻译结果
  translationModel    String?
  translatedText      String? @db.Text
  translationMetadata Json?

  // 其他数据
  summary  String? @db.Text
  toc      Json? // Table of Contents
  metadata Json? // 其他元数据

  processingTime Int? // 处理时间（毫秒）
  errorMessage   String? @db.Text

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  // 关联
  annotations    Annotation[]
  semanticGroups SemanticGroup[]
  chatMessages   ChatMessage[]
  references     Reference[]

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

enum DocStatus {
  PENDING
  PROCESSING
  OCR_COMPLETED
  TRANSLATION_COMPLETED
  COMPLETED
  FAILED
}

// ==================== 高亮与标注 ====================

model Annotation {
  id     String @id @default(uuid())
  userId String
  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  documentId String
  document   Document @relation(fields: [documentId], references: [id], onDelete: Cascade)

  type       String // 'highlight' | 'note'
  color      String?
  startIndex Int
  endIndex   Int
  text       String  @db.Text
  note       String? @db.Text

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([documentId])
  @@index([userId])
  @@map("annotations")
}

// ==================== 意群数据 ====================

model SemanticGroup {
  id         String   @id @default(uuid())
  documentId String
  document   Document @relation(fields: [documentId], references: [id], onDelete: Cascade)

  groups  Json // 存储意群数组
  version String?
  source  String?

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@unique([documentId])
  @@map("semantic_groups")
}

// ==================== 翻译术语库 ====================

model Glossary {
  id     String @id @default(uuid())
  userId String
  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  name    String
  enabled Boolean @default(true)
  entries Json // 存储术语条目数组

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([userId])
  @@map("glossaries")
}

// ==================== 系统配置（管理员）====================

model SystemConfig {
  id          String  @id @default(uuid())
  key         String  @unique
  value       String  @db.Text
  description String?

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@map("system_config")
}

// ==================== 已处理文件记录 ====================

model ProcessedFile {
  id     String @id @default(uuid())
  userId String
  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  fileIdentifier String // 文件标识符 (name + size + lastModified)
  fileName       String
  processedAt    DateTime @default(now())

  @@unique([userId, fileIdentifier])
  @@index([userId])
  @@map("processed_files")
}

// ==================== 用户配额管理 ====================

model UserQuota {
  id     String @id @default(uuid())
  userId String @unique
  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  // 配额限制 (-1 表示无限制)
  maxDocumentsPerDay   Int @default(-1)
  maxDocumentsPerMonth Int @default(-1)
  maxStorageSize       Int @default(-1) // MB
  maxApiKeysCount      Int @default(-1)

  // 当前使用量
  documentsThisMonth Int @default(0)
  currentStorageUsed Int @default(0) // MB

  // 重置时间
  lastMonthlyReset DateTime @default(now())

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@map("user_quotas")
}

// ==================== 使用量日志 ====================

model UsageLog {
  id         String  @id @default(uuid())
  userId     String
  action     String // 'ocr', 'translate', 'document_create', etc.
  resourceId String? // 关联的资源ID（如文档ID）
  metadata   Json? // 额外元数据

  createdAt DateTime @default(now())

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

// ==================== 聊天消息 ====================

model ChatMessage {
  id         String   @id @default(uuid())
  documentId String
  document   Document @relation(fields: [documentId], references: [id], onDelete: Cascade)
  userId     String
  user       User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  role      String // 'user' | 'assistant'
  content   String   @db.Text
  timestamp DateTime @default(now())
  metadata  Json? // 扩展信息（模型、token 等）

  @@index([documentId, timestamp])
  @@map("chat_messages")
}

// ==================== 文献引用 ====================

model Reference {
  id         String   @id @default(uuid())
  documentId String
  document   Document @relation(fields: [documentId], references: [id], onDelete: Cascade)
  userId     String
  user       User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  citationKey String // 引用标识符（如 "[1]"）
  doi         String?
  title       String?
  authors     Json? // [{name, affiliation}]
  year        Int?
  journal     String?
  volume      String?
  pages       String?
  url         String?
  metadata    Json? // 完整元数据

  createdAt DateTime @default(now())

  @@unique([documentId, citationKey])
  @@index([documentId])
  @@map("references")
}

// ==================== 提示词池 ====================

model PromptPool {
  id     String @id @default(uuid())
  userId String @unique
  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  prompts      Json // 提示词数组
  healthConfig Json? // 健康检查配置

  updatedAt DateTime @default(now()) @updatedAt

  @@map("prompt_pool")
}