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

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

enum SubscriptionStatus {
  pending_activation
  active
  past_due
  canceled
  expired
}

enum PaymentInvoiceStatus {
  pending
  paid
  expired
  canceled
}

enum GenerationMode {
  text_to_image
  image_to_image
}

enum GenerationRequestStatus {
  queued
  running
  succeeded
  failed
  canceled
}

enum GenerationAttemptStatus {
  started
  succeeded
  failed
}

enum ProviderFailureCategory {
  transport
  timeout
  provider_5xx
  provider_4xx_user
  insufficient_funds
  unknown
}

enum ProviderKeyState {
  active
  cooldown
  out_of_funds
  manual_review
  disabled
}

enum UsageLedgerEntryType {
  cycle_reset
  generation_success
  manual_adjustment
  refund
}

enum TelegramPairingStatus {
  pending
  completed
  expired
  revoked
}

enum AdminActorType {
  system
  web_admin
  telegram_admin
  cli_operator
}

model User {
  id                   String             @id @default(cuid())
  email                String             @unique
  passwordHash         String
  passwordResetVersion Int                @default(0)
  isAdmin              Boolean            @default(false)
  createdAt            DateTime           @default(now())
  updatedAt            DateTime           @updatedAt
  subscriptions        Subscription[]
  invoices             PaymentInvoice[]
  generationRequests   GenerationRequest[]
  usageLedgerEntries   UsageLedgerEntry[]
  sessions             UserSession[]
  passwordResetTokens  PasswordResetToken[]
}

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

  @@index([userId, createdAt])
  @@index([expiresAt, revokedAt])
}

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

  @@index([userId, createdAt])
  @@index([expiresAt, consumedAt])
}

model SubscriptionPlan {
  id                  String         @id @default(cuid())
  code                String         @unique
  displayName         String
  monthlyRequestLimit Int
  monthlyPriceUsd     Decimal        @db.Decimal(12, 2)
  billingCurrency     String
  isActive            Boolean        @default(true)
  createdAt           DateTime       @default(now())
  updatedAt           DateTime       @updatedAt
  subscriptions       Subscription[]
}

model Subscription {
  id                   String              @id @default(cuid())
  userId               String
  planId               String
  status               SubscriptionStatus
  renewsManually       Boolean             @default(true)
  activatedAt          DateTime?
  currentPeriodStart   DateTime?
  currentPeriodEnd     DateTime?
  canceledAt           DateTime?
  createdAt            DateTime            @default(now())
  updatedAt            DateTime            @updatedAt
  user                 User                @relation(fields: [userId], references: [id], onDelete: Cascade)
  plan                 SubscriptionPlan    @relation(fields: [planId], references: [id], onDelete: Restrict)
  invoices             PaymentInvoice[]

  @@index([userId, status])
}

model PaymentInvoice {
  id                String               @id @default(cuid())
  userId            String
  subscriptionId    String?
  provider          String
  providerInvoiceId String?              @unique
  status            PaymentInvoiceStatus
  currency          String
  amountCrypto      Decimal              @db.Decimal(20, 8)
  amountUsd         Decimal?             @db.Decimal(12, 2)
  paymentAddress    String?
  expiresAt         DateTime?
  paidAt            DateTime?
  createdAt         DateTime             @default(now())
  updatedAt         DateTime             @updatedAt
  user              User                 @relation(fields: [userId], references: [id], onDelete: Cascade)
  subscription      Subscription?        @relation(fields: [subscriptionId], references: [id], onDelete: SetNull)

  @@index([userId, status])
}

model GenerationRequest {
  id                String                  @id @default(cuid())
  userId            String
  mode              GenerationMode
  status            GenerationRequestStatus @default(queued)
  providerModel     String
  prompt            String
  sourceImageKey    String?
  resolutionPreset  String
  batchSize         Int
  imageStrength     Decimal?                @db.Decimal(4, 3)
  idempotencyKey    String?                 @unique
  terminalErrorCode String?
  terminalErrorText String?
  requestedAt       DateTime                @default(now())
  startedAt         DateTime?
  completedAt       DateTime?
  createdAt         DateTime                @default(now())
  updatedAt         DateTime                @updatedAt
  user              User                    @relation(fields: [userId], references: [id], onDelete: Cascade)
  attempts          GenerationAttempt[]
  assets            GeneratedAsset[]
  usageLedgerEntry  UsageLedgerEntry?

  @@index([userId, status, requestedAt])
}

model GenerationAttempt {
  id                   String                  @id @default(cuid())
  generationRequestId  String
  providerKeyId        String
  attemptIndex         Int
  status               GenerationAttemptStatus @default(started)
  usedProxy            Boolean                 @default(false)
  directFallbackUsed   Boolean                 @default(false)
  failureCategory      ProviderFailureCategory?
  providerHttpStatus   Int?
  providerErrorCode    String?
  providerErrorText    String?
  startedAt            DateTime                @default(now())
  completedAt          DateTime?
  createdAt            DateTime                @default(now())
  generationRequest    GenerationRequest       @relation(fields: [generationRequestId], references: [id], onDelete: Cascade)
  providerKey          ProviderKey             @relation(fields: [providerKeyId], references: [id], onDelete: Restrict)

  @@unique([generationRequestId, attemptIndex])
  @@index([providerKeyId, startedAt])
}

model GeneratedAsset {
  id                  String            @id @default(cuid())
  generationRequestId String
  objectKey           String            @unique
  mimeType            String
  width               Int?
  height              Int?
  bytes               Int?
  createdAt           DateTime          @default(now())
  generationRequest   GenerationRequest @relation(fields: [generationRequestId], references: [id], onDelete: Cascade)

  @@index([generationRequestId])
}

model UsageLedgerEntry {
  id                  String               @id @default(cuid())
  userId              String
  generationRequestId String?              @unique
  entryType           UsageLedgerEntryType
  deltaRequests       Int
  cycleStartedAt      DateTime?
  cycleEndsAt         DateTime?
  note                String?
  createdAt           DateTime             @default(now())
  user                User                 @relation(fields: [userId], references: [id], onDelete: Cascade)
  generationRequest   GenerationRequest?   @relation(fields: [generationRequestId], references: [id], onDelete: SetNull)

  @@index([userId, createdAt])
}

model ProviderProxy {
  id           String        @id @default(cuid())
  label        String        @unique
  baseUrl      String
  isActive     Boolean       @default(true)
  createdAt    DateTime      @default(now())
  updatedAt    DateTime      @updatedAt
  providerKeys ProviderKey[]
}

model ProviderKey {
  id                           String                   @id @default(cuid())
  providerCode                 String
  label                        String                   @unique
  apiKeyCiphertext             String
  apiKeyLastFour               String
  state                        ProviderKeyState         @default(active)
  roundRobinOrder              Int
  consecutiveRetryableFailures Int                      @default(0)
  cooldownUntil                DateTime?
  lastErrorCategory            ProviderFailureCategory?
  lastErrorCode                String?
  lastErrorAt                  DateTime?
  balanceMinorUnits            BigInt?
  balanceCurrency              String?
  balanceRefreshedAt           DateTime?
  proxyId                      String?
  disabledAt                   DateTime?
  createdAt                    DateTime                 @default(now())
  updatedAt                    DateTime                 @updatedAt
  proxy                        ProviderProxy?           @relation(fields: [proxyId], references: [id], onDelete: SetNull)
  attempts                     GenerationAttempt[]
  statusEvents                 ProviderKeyStatusEvent[]

  @@index([providerCode, state, roundRobinOrder])
}

model ProviderKeyStatusEvent {
  id              String                   @id @default(cuid())
  providerKeyId   String
  fromState       ProviderKeyState?
  toState         ProviderKeyState
  reason          String
  errorCategory   ProviderFailureCategory?
  errorCode       String?
  actorType       AdminActorType
  actorRef        String?
  metadata        Json?
  createdAt       DateTime                 @default(now())
  providerKey     ProviderKey              @relation(fields: [providerKeyId], references: [id], onDelete: Cascade)

  @@index([providerKeyId, createdAt])
}

model TelegramPairing {
  id                   String                @id @default(cuid())
  telegramUserId       String
  telegramUsername     String?
  displayNameSnapshot  String
  codeHash             String
  expiresAt            DateTime
  status               TelegramPairingStatus @default(pending)
  completedAt          DateTime?
  createdAt            DateTime              @default(now())
  updatedAt            DateTime              @updatedAt

  @@index([telegramUserId, status])
  @@index([expiresAt, status])
}

model TelegramAdminAllowlistEntry {
  telegramUserId      String   @id
  telegramUsername    String?
  displayNameSnapshot String
  pairedAt            DateTime @default(now())
  revokedAt           DateTime?
  isActive            Boolean  @default(true)
  createdAt           DateTime @default(now())
  updatedAt           DateTime @updatedAt
}

model AdminAuditLog {
  id         String         @id @default(cuid())
  actorType  AdminActorType
  actorRef   String?
  action     String
  targetType String
  targetId   String?
  metadata   Json?
  createdAt  DateTime       @default(now())

  @@index([targetType, targetId, createdAt])
  @@index([actorType, createdAt])
}