// DoTouch.AI - Prisma Schema
// PostgreSQL 16 datasource, client generated via `pnpm db:generate`
generator client {
  provider = "prisma-client-js"
}

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

// ---- 用户 ----
model User {
  id           String   @id @default(cuid())
  email        String   @unique
  passwordHash String   @map("password_hash")
  // 社交登录：provider = local | google | facebook；providerId 为平台唯一 ID（同邮箱绑定后记录）
  provider     String   @default("local")
  providerId   String?  @unique @map("provider_id")
  role         String   @default("user") // user | admin
  currency     String   @default("USD")
  balanceCents BigInt   @default(0) @map("balance_cents")
  status       String   @default("active") // active | suspended | banned
  createdAt    DateTime @default(now()) @map("created_at")
  updatedAt    DateTime @updatedAt @map("updated_at")

  // 用量配额（null = 不限）
  dailyRequestLimit     Int?    @map("daily_request_limit")
  dailyTokenLimit       BigInt? @map("daily_token_limit")
  dailyCostCentsLimit   Int?    @map("daily_cost_cents_limit")
  totalRequestLimit     Int?    @map("total_request_limit")
  totalTokenLimit       BigInt? @map("total_token_limit")
  totalCostCentsLimit   Int?    @map("total_cost_cents_limit")
  alertPct              Int     @default(80) @map("alert_pct")

  apiKeys             ApiKey[]
  balanceTransactions BalanceTransaction[]
  usageRecords        UsageRecord[]
  orders              Order[]

  @@map("users")
}

// ---- API 密钥 ----
model ApiKey {
  id         String    @id @default(cuid())
  userId     String    @map("user_id")
  name       String
  keyHash    String    @unique @map("key_hash")
  prefix     String    // 前 12 位用于展示（dt_ + 32 hex = 36 chars）
  expiresAt  DateTime? @map("expires_at")
  lastUsedAt DateTime? @map("last_used_at")
  status     String    @default("active") // active | revoked
  createdAt  DateTime  @default(now()) @map("created_at")
  updatedAt  DateTime  @updatedAt @map("updated_at")

  // 用量配额（null = 不限）
  dailyRequestLimit     Int?    @map("daily_request_limit")
  dailyTokenLimit       BigInt? @map("daily_token_limit")
  dailyCostCentsLimit   Int?    @map("daily_cost_cents_limit")
  totalRequestLimit     Int?    @map("total_request_limit")
  totalTokenLimit       BigInt? @map("total_token_limit")
  totalCostCentsLimit   Int?    @map("total_cost_cents_limit")
  alertPct              Int     @default(80) @map("alert_pct")

  user         User           @relation(fields: [userId], references: [id])
  usageRecords UsageRecord[]
  events       ApiKeyEvent[]

  @@map("api_keys")
}

// ---- API Key 事件审计日志 ----
model ApiKeyEvent {
  id        String   @id @default(cuid())
  apiKeyId  String   @map("api_key_id")
  userId    String   @map("user_id")
  action    String   // created | rotated | revoked | used
  ip        String?
  createdAt DateTime @default(now()) @map("created_at")

  apiKey ApiKey @relation(fields: [apiKeyId], references: [id])

  @@map("api_key_events")
}

// ---- 模型目录（DB-backed） ----
model ModelCatalog {
  id             String   @id @default(cuid())
  publicId       String   @unique @map("public_id")
  upstreamId     String   @map("upstream_id")
  name           String
  provider       String   // Zhipu | DeepSeek | Alibaba | MiniMax | Kimi | SiliconFlow | Other
  category       String   // chat | vision | image | speech
  description    String?
  contextWindow  Int?     @map("context_window")
  maxOutput      Int?     @map("max_output")
  inputPriceCents  Int    @default(0) @map("input_price_cents")
  outputPriceCents Int   @default(0) @map("output_price_cents")
  isRecommended  Boolean  @default(false) @map("is_recommended")
  status         String   @default("active") // active | hidden | disabled
  sortOrder      Int      @default(0) @map("sort_order")
  createdAt      DateTime @default(now()) @map("created_at")
  updatedAt      DateTime @updatedAt @map("updated_at")

  @@map("models")
}

// ---- 余额变动记录 ----
model BalanceTransaction {
  id         String   @id @default(cuid())
  userId     String   @map("user_id")
  amountCents BigInt  @map("amount_cents")
  type       String   // topup | charge | refund | usage | refund
  refId      String?  @map("ref_id")
  createdAt  DateTime @default(now()) @map("created_at")

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

  @@map("balance_transactions")
}

// ---- 用量记录 ----
model UsageRecord {
  id               String   @id @default(cuid())
  userId           String   @map("user_id")
  apiKeyId         String   @map("api_key_id")
  model            String
  promptTokens     Int      @map("prompt_tokens")
  completionTokens Int      @map("completion_tokens")
  costCents        Int      @map("cost_cents")
  createdAt        DateTime @default(now()) @map("created_at")

  user   User   @relation(fields: [userId], references: [id])
  apiKey ApiKey @relation(fields: [apiKeyId], references: [id])

  @@map("usage_records")
}

// ---- 配额事件（预警 + 超限审计） ----
model QuotaEvent {
  id         String   @id @default(cuid())
  userId     String   @map("user_id")
  apiKeyId   String?  @map("api_key_id")
  dimension  String   // request | token | cost
  windowType String   @map("window_type") // daily | total
  scopeType  String   @map("scope_type") // account | key
  threshold  Int
  current    BigInt
  action     String   // alert | block
  createdAt  DateTime @default(now()) @map("created_at")

  @@map("quota_events")
}

// ---- 订单 ----
model Order {
  id              String    @id @default(cuid())
  userId          String    @map("user_id")
  provider        String    // alipay | stripe | ...
  providerOrderId String?   @map("provider_order_id")
  amountCents     BigInt    @map("amount_cents")
  status          String    @default("pending") // pending | paid | failed | refunded
  currency        String    @default("USD")
  paidAt          DateTime? @map("paid_at")
  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

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

  @@map("orders")
}