enum NotificationDeliveryStatus {
  PENDING
  SENT
  FAILED
  SKIPPED
  READ
}

enum NotificationPreferenceChannel {
  IN_APP
  EMAIL
}

model NotificationDelivery {
  id                String                     @id @default(cuid())
  createdAt         DateTime                   @default(now())
  updatedAt         DateTime                   @updatedAt
  tenantId          String?
  userId            String?
  channel           NotificationPreferenceChannel
  category          String
  messageKey        String
  sourceKey         String?
  status            NotificationDeliveryStatus @default(PENDING)
  attemptsMade      Int                        @default(0)
  providerMessageId String?
  lastError         String?
  payloadMetadata   Json?
  sentAt            DateTime?
  readAt            DateTime?
  tenant            Tenant?                    @relation(fields: [tenantId], references: [id], onDelete: SetNull)
  user              User?                      @relation(fields: [userId], references: [id], onDelete: SetNull)

  @@index([tenantId, userId, status], name: "notification_delivery_tenant_user_status_idx")
  @@index([tenantId, channel, category], name: "notification_delivery_tenant_channel_category_idx")
  @@index([status, updatedAt], name: "notification_delivery_status_updated_at_idx")
  @@index([providerMessageId], name: "notification_delivery_provider_message_id_idx")
  @@unique([tenantId, userId, channel, sourceKey], name: "notification_delivery_source_key")
}

model UserNotificationPreference {
  id        String                        @id @default(cuid())
  createdAt DateTime                      @default(now())
  updatedAt DateTime                      @updatedAt
  tenantId  String
  userId    String
  channel   NotificationPreferenceChannel
  category  String
  enabled   Boolean                       @default(true)
  tenant    Tenant                        @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  user      User                          @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([tenantId, userId, channel, category], name: "user_notification_preference_scope_key")
  @@index([tenantId, userId, category], name: "user_notification_preference_tenant_user_category_idx")
  @@index([tenantId, category], name: "user_notification_preference_tenant_category_idx")
}

// DeviceToken (Phase 08 #65 — Capacitor mobile wrapper).
//
// Tracks active APNs / FCM / WebPush device tokens per user. The
// register-device API endpoint upserts by `token` (globally unique).
// `lastSeenAt` is bumped on every successful send so an out-of-band
// cron can prune tokens older than 90d without disrupting active users.
// `revokedAt` is set when the provider returns `Unregistered` or
// `InvalidRegistration`; the worker job filters on `revokedAt IS NULL`.
model DeviceToken {
  id           String    @id @default(cuid())
  createdAt    DateTime  @default(now())
  updatedAt    DateTime  @updatedAt
  userId       String
  tenantId     String?
  platform     String    // 'ios' | 'android' | 'web'
  token        String    @unique
  pushProvider String    // 'fcm' | 'apns' | 'webpush'
  appVersion   String?
  lastSeenAt   DateTime  @default(now())
  revokedAt    DateTime?

  user   User    @relation(fields: [userId], references: [id], onDelete: Cascade)
  tenant Tenant? @relation(fields: [tenantId], references: [id], onDelete: SetNull)

  @@index([userId, tenantId], name: "device_token_user_tenant_idx")
  @@index([tenantId, platform], name: "device_token_tenant_platform_idx")
  @@index([revokedAt], name: "device_token_revoked_at_idx")
}