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

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

model User {
  id                   String    @id @default(cuid())
  email                String?   @db.VarChar(255)
  nickname             String?   @db.VarChar(100)
  avatarUrl            String?   @db.VarChar(500)
  role                 String    @default("USER") @db.VarChar(32)
  status               String    @default("active") @db.VarChar(32)
  onboardingCompleted  Boolean   @default(false)
  lastLoginAt          DateTime?
  createdAt            DateTime  @default(now())
  updatedAt            DateTime  @updatedAt
  deletedAt            DateTime?

  authAccounts         AuthAccount[]
  refreshTokens        RefreshToken[]
  profile              UserProfile?
  preferences          UserPreference?
  consents             UserConsent[]
  knowledgeBases       KnowledgeBase[]
  knowledgeItems       KnowledgeItem[]
  knowledgeItemRelations KnowledgeItemRelation[]
  tags                 Tag[]
  uploadedFiles        UploadedFile[]
  documentImports      DocumentImport[]
  learningSessions     LearningSession[]
  learningRecords      LearningRecord[]
  activeRecallQuestions ActiveRecallQuestion[]
  activeRecallAnswers  ActiveRecallAnswer[]
  aiAnalysisJobs       AiAnalysisJob[]
  aiAnalysisResults    AiAnalysisResult[]
  focusItems           FocusItem[]
  reviewCards          ReviewCard[]
  reviewLogs           ReviewLog[]
  reviewPlans          ReviewPlan[]
  dailyLearningActivities DailyLearningActivity[]
  notifications        Notification[]
  feedbacks            Feedback[]
  aiUsageLogs          AiUsageLog[]
  knowledgeSources     KnowledgeSource[]
  knowledgeChunks      KnowledgeChunk[]
  importCandidates     ImportCandidate[]

  @@index([email])
  @@index([status])
}

model AuthAccount {
  id              String    @id @default(cuid())
  userId          String
  provider        String    @db.VarChar(32)
  providerUserId  String    @db.VarChar(255)
  email           String?   @db.VarChar(255)
  rawProfileJson  Json?
  createdAt       DateTime  @default(now())
  updatedAt       DateTime  @updatedAt

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

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

model RefreshToken {
  id         String    @id @default(cuid())
  userId     String
  tokenHash  String    @db.VarChar(255)
  deviceId   String?   @db.VarChar(255)
  deviceName String?   @db.VarChar(255)
  expiresAt  DateTime
  revokedAt  DateTime?
  createdAt  DateTime  @default(now())
  updatedAt  DateTime  @updatedAt

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

  @@index([userId])
  @@index([tokenHash])
}

model UserProfile {
  id                String    @id @default(cuid())
  userId            String    @unique
  learningIdentity  String?   @db.VarChar(100)
  learningDirection String?   @db.VarChar(255)
  bio               String?   @db.Text
  currentGoal       String?   @db.VarChar(255)
  createdAt         DateTime  @default(now())
  updatedAt         DateTime  @updatedAt

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

model UserPreference {
  id                  String    @id @default(cuid())
  userId              String    @unique
  preferredMethods    Json?
  defaultFocusMinutes Int       @default(25)
  aiSuggestionLevel   String    @default("normal") @db.VarChar(32)
  language            String    @default("zh-CN") @db.VarChar(32)
  appearance          String    @default("system") @db.VarChar(32)
  notificationEnabled Boolean   @default(true)
  createdAt           DateTime  @default(now())
  updatedAt           DateTime  @updatedAt

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

model UserConsent {
  id          String    @id @default(cuid())
  userId      String
  consentType String    @db.VarChar(32)
  version     String    @db.VarChar(50)
  acceptedAt  DateTime
  ipAddress   String?   @db.VarChar(100)
  userAgent   String?   @db.VarChar(500)
  createdAt   DateTime  @default(now())

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

  @@index([userId])
  @@index([consentType])
}

model KnowledgeBase {
  id            String    @id @default(cuid())
  userId        String
  title         String    @db.VarChar(255)
  description   String?   @db.Text
  coverKey      String?   @db.VarChar(100)
  status        String    @default("active") @db.VarChar(32)
  itemCount     Int       @default(0)
  lastStudiedAt DateTime?
  createdAt     DateTime  @default(now())
  updatedAt     DateTime  @updatedAt
  deletedAt     DateTime?

  user          User              @relation(fields: [userId], references: [id])
  items         KnowledgeItem[]
  sources       KnowledgeSource[]
  candidates    ImportCandidate[]
  chunks        KnowledgeChunk[]
  focusItems    FocusItem[]

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

model KnowledgeItem {
  id                  String    @id @default(cuid())
  userId              String
  knowledgeBaseId     String
  parentId            String?
  itemType            String    @db.VarChar(32)
  title               String    @db.VarChar(255)
  content             String?   @db.LongText
  summary             String?   @db.Text
  sourceType          String?   @db.VarChar(32)
  sourceRef           String?   @db.VarChar(500)
  sourceDeleted       Boolean   @default(false)
  sourceTitleSnapshot String?   @db.VarChar(255)
  sourceSnippetSnapshot String? @db.Text
  orderIndex          Int       @default(0)
  status              String    @default("active") @db.VarChar(32)
  createdAt           DateTime  @default(now())
  updatedAt           DateTime  @updatedAt
  deletedAt           DateTime?

  user            User              @relation(fields: [userId], references: [id])
  knowledgeBase   KnowledgeBase     @relation(fields: [knowledgeBaseId], references: [id])
  parent          KnowledgeItem?    @relation("KnowledgeItemRelations", fields: [parentId], references: [id])
  children        KnowledgeItem[]   @relation("KnowledgeItemRelations")
  tags            KnowledgeItemTag[]

  @@index([userId])
  @@index([knowledgeBaseId])
  @@index([parentId])
  @@index([itemType])
}

model KnowledgeItemRelation {
  id            String    @id @default(cuid())
  userId        String
  sourceItemId  String
  targetItemId  String
  relationType  String    @db.VarChar(32)
  confidence    Decimal?  @db.Decimal(5, 2)
  reason        String?   @db.Text
  createdAt     DateTime  @default(now())
  updatedAt     DateTime  @updatedAt

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

  @@index([sourceItemId])
  @@index([targetItemId])
}

model Tag {
  id        String              @id @default(cuid())
  userId    String
  name      String              @db.VarChar(100)
  color     String?             @db.VarChar(32)
  createdAt DateTime            @default(now())
  updatedAt DateTime            @updatedAt

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

  @@unique([userId, name])
}

model KnowledgeItemTag {
  id              String        @id @default(cuid())
  knowledgeItemId String
  tagId           String
  createdAt       DateTime      @default(now())

  knowledgeItem   KnowledgeItem @relation(fields: [knowledgeItemId], references: [id])
  tag             Tag           @relation(fields: [tagId], references: [id])

  @@unique([knowledgeItemId, tagId])
}

model UploadedFile {
  id          String    @id @default(cuid())
  userId      String
  filename    String    @db.VarChar(255)
  mimeType    String?   @db.VarChar(100)
  storagePath String    @db.VarChar(500)
  objectKey   String?   @db.VarChar(500)
  bucket      String?   @db.VarChar(100)
  sizeBytes   BigInt    @default(0)
  checksum    String?   @db.VarChar(255)
  sha256      String?   @db.VarChar(64)
  purpose     String?   @db.VarChar(32)
  createdAt   DateTime  @default(now())

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

  @@index([userId])
  @@index([objectKey])
  @@index([sha256])
}

model DocumentImport {
  id              String    @id @default(cuid())
  userId          String
  knowledgeBaseId String?
  sourceId        String?
  fileId          String?
  sourceType      String    @db.VarChar(32)
  sourceName      String?   @db.VarChar(255)
  sourceUrl       String?   @db.VarChar(500)
  rawText         String?   @db.LongText
  status          String    @default("QUEUED") @db.VarChar(32)
  step            String?   @db.VarChar(32)
  progress        Int       @default(0)
  workerId        String?   @db.VarChar(255)
  retryCount      Int       @default(0)
  maxRetries      Int       @default(3)
  heartbeatAt     DateTime?
  errorCode       String?   @db.VarChar(32)
  errorMessage    String?   @db.Text
  resultJson      Json?
  startedAt       DateTime?
  completedAt     DateTime?
  createdAt       DateTime  @default(now())
  updatedAt       DateTime  @updatedAt

  user            User      @relation(fields: [userId], references: [id])
  source          KnowledgeSource? @relation(fields: [sourceId], references: [id])
  candidates      ImportCandidate[]

  @@index([userId])
  @@index([status])
  @@index([sourceId])
  @@index([workerId])
}

model LearningSession {
  id                String    @id @default(cuid())
  userId            String
  knowledgeBaseId   String?
  knowledgeItemId   String?
  mode              String    @db.VarChar(32)
  status            String    @default("active") @db.VarChar(32)
  startedAt         DateTime
  endedAt           DateTime?
  durationSeconds   Int       @default(0)
  focusMinutes      Int?
  metadata          Json?
  createdAt         DateTime  @default(now())
  updatedAt         DateTime  @updatedAt

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

  @@index([userId])
  @@index([knowledgeItemId])
  @@index([startedAt])
}

model LearningRecord {
  id              String    @id @default(cuid())
  userId          String
  sessionId       String?
  recordType      String    @db.VarChar(32)
  title           String    @db.VarChar(255)
  description     String?   @db.Text
  durationSeconds Int       @default(0)
  occurredAt      DateTime
  metadata        Json?
  createdAt       DateTime  @default(now())

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

  @@index([userId])
  @@index([occurredAt])
}

model ActiveRecallQuestion {
  id              String    @id @default(cuid())
  userId          String
  knowledgeItemId String?
  questionText    String    @db.Text
  difficulty      String?   @db.VarChar(32)
  createdBy       String    @default("ai") @db.VarChar(32)
  createdAt       DateTime  @default(now())
  updatedAt       DateTime  @updatedAt

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

  @@index([userId])
  @@index([knowledgeItemId])
}

model ActiveRecallAnswer {
  id          String    @id @default(cuid())
  userId      String
  questionId  String?
  sessionId   String?
  answerType  String    @default("text") @db.VarChar(32)
  answerText  String?   @db.LongText
  audioFileId String?
  submittedAt DateTime
  createdAt   DateTime  @default(now())

  user        User      @relation(fields: [userId], references: [id])
  question    ActiveRecallQuestion? @relation(fields: [questionId], references: [id])

  @@index([userId])
  @@index([questionId])
  @@index([sessionId])
}

model AiAnalysisJob {
  id             String            @id @default(cuid())
  userId         String
  sessionId      String?
  answerId       String?
  jobType        String            @db.VarChar(32)
  status         String            @default("pending") @db.VarChar(32)
  progress       Int               @default(0)
  errorMessage   String?           @db.Text
  queuedAt       DateTime?
  startedAt      DateTime?
  completedAt    DateTime?
  createdAt      DateTime          @default(now())
  updatedAt      DateTime          @updatedAt

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

  @@index([userId])
  @@index([status])
  @@index([sessionId])
}

model AiAnalysisResult {
  id             String            @id @default(cuid())
  userId         String
  jobId          String
  sessionId      String?
  answerId       String?
  summary        String?           @db.Text
  masteryScore   Int?
  strengths      Json?
  weaknesses     Json?
  suggestions    Json?
  nextActions    Json?
  rawResult      Json?
  createdAt      DateTime          @default(now())
  updatedAt      DateTime          @updatedAt

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

  @@index([userId])
  @@index([jobId])
  @@index([sessionId])
}

model FocusItem {
  id               String    @id @default(cuid())
  userId           String
  knowledgeBaseId  String?
  knowledgeItemId  String?
  analysisResultId String?
  title            String    @db.VarChar(255)
  reason           String?   @db.Text
  suggestion       String?   @db.Text
  priority         String    @default("normal") @db.VarChar(32)
  status           String    @default("open") @db.VarChar(32)
  masteryScore     Int?
  dueAt            DateTime?
  completedAt      DateTime?
  createdAt        DateTime  @default(now())
  updatedAt        DateTime  @updatedAt
  deletedAt        DateTime?

  user             User      @relation(fields: [userId], references: [id])
  knowledgeBase    KnowledgeBase? @relation(fields: [knowledgeBaseId], references: [id])

  @@index([userId])
  @@index([status])
  @@index([dueAt])
}

model ReviewCard {
  id              String       @id @default(cuid())
  userId          String
  knowledgeItemId String?
  focusItemId     String?
  frontText       String       @db.Text
  backText        String?      @db.Text
  difficulty      String?      @db.VarChar(32)
  status          String       @default("active") @db.VarChar(32)
  nextReviewAt    DateTime?
  intervalDays    Int          @default(1)
  easeFactor      Decimal      @default(2.50) @db.Decimal(4, 2)
  repetitionCount Int          @default(0)
  lapseCount      Int          @default(0)
  createdAt       DateTime     @default(now())
  updatedAt       DateTime     @updatedAt
  deletedAt       DateTime?

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

  @@index([userId])
  @@index([nextReviewAt])
  @@index([focusItemId])
}

model ReviewLog {
  id           String     @id @default(cuid())
  userId       String
  reviewCardId String
  sessionId    String?
  rating       String     @db.VarChar(32)
  responseText String?    @db.Text
  reviewedAt   DateTime
  nextReviewAt DateTime?
  createdAt    DateTime   @default(now())

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

  @@index([userId])
  @@index([reviewCardId])
  @@index([reviewedAt])
}

model ReviewPlan {
  id          String    @id @default(cuid())
  userId      String
  title       String    @db.VarChar(255)
  status      String    @default("active") @db.VarChar(32)
  scheduledAt DateTime?
  completedAt DateTime?
  cardCount   Int       @default(0)
  createdAt   DateTime  @default(now())
  updatedAt   DateTime  @updatedAt

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

  @@index([userId])
  @@index([scheduledAt])
}

model DailyLearningActivity {
  id                 String    @id @default(cuid())
  userId             String
  activityDate       DateTime  @db.Date
  durationSeconds    Int       @default(0)
  sessionsCount      Int       @default(0)
  activeRecallCount  Int       @default(0)
  reviewCount        Int       @default(0)
  aiAnalysisCount    Int       @default(0)
  completedLoopCount Int       @default(0)
  activityLevel      Int       @default(0)
  createdAt          DateTime  @default(now())
  updatedAt          DateTime  @updatedAt

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

  @@unique([userId, activityDate])
  @@index([userId])
}

model Notification {
  id        String    @id @default(cuid())
  userId    String
  type      String    @db.VarChar(32)
  title     String    @db.VarChar(255)
  content   String?   @db.Text
  data      Json?
  readAt    DateTime?
  createdAt DateTime  @default(now())

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

  @@index([userId])
  @@index([readAt])
  @@index([type])
}

model Feedback {
  id         String    @id @default(cuid())
  userId     String?
  email      String?   @db.VarChar(255)
  category   String    @db.VarChar(64)
  content    String    @db.Text
  deviceInfo Json?
  status     String    @default("open") @db.VarChar(32)
  createdAt  DateTime  @default(now())
  updatedAt  DateTime  @updatedAt

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

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

model AiUsageLog {
  id           String   @id @default(cuid())
  userId       String
  feature      String   @db.VarChar(64)
  provider     String   @db.VarChar(32)
  model        String   @db.VarChar(100)
  tier         String   @db.VarChar(32)
  promptKey    String   @db.VarChar(128)
  promptVersion String  @db.VarChar(32)
  inputTokens  Int      @default(0)
  outputTokens Int      @default(0)
  estimatedCost Float   @default(0)
  latencyMs    Int      @default(0)
  success      Boolean  @default(true)
  errorMessage String?  @db.VarChar(500)
  createdAt    DateTime @default(now())

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

  @@index([userId])
  @@index([feature])
  @@index([createdAt])
}

model WaitlistEntry {
  id          String   @id @default(cuid())
  nickname    String   @db.VarChar(100)
  email       String   @db.VarChar(255)
  devices     Json?
  interests   Json?
  painpoint   String?  @db.Text
  willingBeta Boolean  @default(false)
  createdAt   DateTime @default(now())

  @@index([email])
}

model AppChangelog {
  id          String    @id @default(cuid())
  version     String    @db.VarChar(50)
  title       String    @db.VarChar(255)
  content     String    @db.Text
  platform    String    @default("ios") @db.VarChar(32)
  publishedAt DateTime?
  createdAt   DateTime  @default(now())
  updatedAt   DateTime  @updatedAt
}

// ── 知识库新增模型 ──

model KnowledgeSource {
  id                String    @id @default(cuid())
  userId            String
  knowledgeBaseId   String
  fileId            String?
  type              String    @default("file") @db.VarChar(32)
  title             String?   @db.VarChar(255)
  originalFilename  String?   @db.VarChar(255)
  mimeType          String?   @db.VarChar(100)
  sizeBytes         BigInt    @default(0)
  textLength        Int       @default(0)
  parseStatus       String    @default("pending") @db.VarChar(32)
  indexStatus       String    @default("pending") @db.VarChar(32)
  learningStatus    String    @default("pending") @db.VarChar(32)
  parsedObjectKey   String?   @db.VarChar(500)
  metadataObjectKey String?   @db.VarChar(500)
  originalObjectKey String?   @db.VarChar(500)
  version           Int       @default(1)
  parentSourceId    String?
  replacedBySourceId String?
  errorCode         String?   @db.VarChar(32)
  errorMessage      String?   @db.Text
  createdAt         DateTime  @default(now())
  updatedAt         DateTime  @updatedAt
  deletedAt         DateTime?

  user              User      @relation(fields: [userId], references: [id])
  knowledgeBase     KnowledgeBase @relation(fields: [knowledgeBaseId], references: [id])
  file              UploadedFile? @relation(fields: [fileId], references: [id])
  chunks            KnowledgeChunk[]
  imports           DocumentImport[]
  candidates        ImportCandidate[]

  @@index([userId])
  @@index([knowledgeBaseId])
  @@index([fileId])
  @@index([parseStatus])
  @@index([indexStatus])
}

model KnowledgeChunk {
  id               String    @id @default(cuid())
  userId           String
  knowledgeBaseId  String
  sourceId         String
  content          String    @db.LongText
  chunkIndex       Int
  pageNumber       Int?
  sectionTitle     String?   @db.VarChar(500)
  tokenCount       Int       @default(0)
  externalVectorId String?   @db.VarChar(255)
  embeddingModel   String?   @db.VarChar(100)
  embeddingStatus  String    @default("pending") @db.VarChar(32)
  metadataJson     Json?
  createdAt        DateTime  @default(now())
  updatedAt        DateTime  @updatedAt
  deletedAt        DateTime?

  user             User      @relation(fields: [userId], references: [id])
  knowledgeBase    KnowledgeBase @relation(fields: [knowledgeBaseId], references: [id])
  source           KnowledgeSource @relation(fields: [sourceId], references: [id])

  @@index([userId])
  @@index([sourceId])
  @@index([knowledgeBaseId])
  @@index([externalVectorId])
}

model ImportCandidate {
  id                 String             @id @default(cuid())
  userId             String
  knowledgeBaseId    String
  sourceId           String
  importId           String
  title              String             @db.VarChar(255)
  summary            String?            @db.Text
  content            String?            @db.LongText
  tagsJson           Json?
  recallQuestionsJson Json?
  sourceTextSnippet  String?            @db.Text
  sourceChunkIds     Json?
  confidence         Decimal            @default(0) @db.Decimal(4, 3)
  difficulty         String?            @db.VarChar(16)
  orderIndex         Int                @default(0)
  status             String             @default("PENDING") @db.VarChar(16)
  createdAt          DateTime           @default(now())
  updatedAt          DateTime           @updatedAt

  user               User               @relation(fields: [userId], references: [id])
  knowledgeBase      KnowledgeBase      @relation(fields: [knowledgeBaseId], references: [id])
  source             KnowledgeSource    @relation(fields: [sourceId], references: [id])
  import             DocumentImport     @relation(fields: [importId], references: [id])

  @@index([userId])
  @@index([sourceId])
  @@index([importId])
  @@index([status])
}

model BackupJob {
  id            String    @id @default(cuid())
  type          String    @db.VarChar(16)
  status        String    @default("RUNNING") @db.VarChar(16)
  localPath     String?   @db.VarChar(500)
  cosObjectKey  String?   @db.VarChar(500)
  fileSizeBytes BigInt    @default(0)
  startedAt     DateTime  @default(now())
  completedAt   DateTime?
  errorMessage  String?   @db.Text
  createdAt     DateTime  @default(now())
}

model AdminUser {
  id               String    @id @default(cuid())
  email            String    @unique @db.VarChar(255)
  passwordHash     String    @db.VarChar(255)
  displayName      String    @db.VarChar(100)
  role             String    @default("ADMIN") @db.VarChar(32)
  status           String    @default("ACTIVE") @db.VarChar(32)
  twoFactorEnabled Boolean   @default(false)
  twoFactorSecret  String?   @db.VarChar(100)
  lastLoginAt      DateTime?
  lastLoginIp      String?   @db.VarChar(45)
  failedLoginCount Int       @default(0)
  lockedUntil      DateTime?
  createdAt        DateTime  @default(now())
  updatedAt        DateTime  @updatedAt
  deletedAt        DateTime?

  sessions         AdminSession[]
  conversations    AdminConversation[]
  auditLogs        AdminAuditLog[]

  @@index([email])
  @@index([status])
}

model AdminSession {
  id               String    @id @default(cuid())
  adminUserId      String
  refreshTokenHash String    @db.VarChar(255)
  ip               String?   @db.VarChar(45)
  userAgent        String?   @db.VarChar(500)
  expiresAt        DateTime
  revokedAt        DateTime?
  createdAt        DateTime  @default(now())
  updatedAt        DateTime  @updatedAt

  adminUser        AdminUser @relation(fields: [adminUserId], references: [id])

  @@index([adminUserId])
  @@index([refreshTokenHash])
}

model AdminAuditLog {
  id           String   @id @default(cuid())
  adminUserId  String
  action       String   @db.VarChar(64)
  resourceType String?  @db.VarChar(64)
  resourceId   String?  @db.VarChar(255)
  beforeJson   Json?
  afterJson    Json?
  ip           String?  @db.VarChar(45)
  userAgent    String?  @db.VarChar(500)
  riskLevel    String?  @db.VarChar(16)
  reason       String?  @db.VarChar(500)
  createdAt    DateTime @default(now())

  adminUser    AdminUser @relation(fields: [adminUserId], references: [id])

  @@index([adminUserId])
  @@index([action])
  @@index([createdAt])
}

model MembershipPlan {
  id                    String    @id @default(cuid())
  code                  String    @unique @db.VarChar(32)
  name                  String    @db.VarChar(100)
  priceMonthly          Int       @default(0)
  priceYearly           Int       @default(0)
  maxKnowledgeBases     Int       @default(1)
  maxStorageBytes       BigInt    @default(0)
  maxFileSizeBytes      BigInt    @default(0)
  monthlyOcrPages       Int       @default(0)
  monthlyVisionPages    Int       @default(0)
  monthlyChatCount      Int       @default(0)
  monthlyAiAnalysisCount Int      @default(0)
  monthlyRecallCount    Int       @default(0)
  monthlyCardGenCount   Int       @default(0)
  isActive              Boolean   @default(true)
  createdAt             DateTime  @default(now())
  updatedAt             DateTime  @updatedAt
}

model AdminConversation {
  id              String    @id @default(cuid())
  adminUserId     String
  title           String    @default("新对话") @db.VarChar(200)
  hermesSessionId String    @unique @db.VarChar(64)
  createdAt       DateTime  @default(now())
  updatedAt       DateTime  @updatedAt
  deletedAt       DateTime?
  messages        AdminMessage[]

  adminUser       AdminUser @relation(fields: [adminUserId], references: [id])

  @@index([adminUserId])
  @@index([hermesSessionId])
}

model AdminMessage {
  id             String   @id @default(cuid())
  conversationId String
  role           String   @db.VarChar(16)
  content        String   @db.LongText
  createdAt      DateTime @default(now())

  conversation   AdminConversation @relation(fields: [conversationId], references: [id])

  @@index([conversationId])
  @@index([createdAt])
}

model AdminCostItem {
  id           String   @id @default(cuid())
  name         String   @db.VarChar(100)
  category     String   @default("other") @db.VarChar(32)
  amount       Float
  currency     String   @default("CNY") @db.VarChar(8)
  purchaseDate DateTime
  expiryDate   DateTime?
  billingCycle String   @default("once") @db.VarChar(16)
  note         String?  @db.VarChar(255)
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt

  @@index([category])
  @@index([expiryDate])
}

model AppConfig {
  id          String   @id @default(cuid())
  key         String   @unique @db.VarChar(100)
  value       String   @db.Text
  description String?  @db.VarChar(500)
  environment String   @default("production") @db.VarChar(32)
  updatedBy   String?  @db.VarChar(100)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  @@index([key])
}

model FeatureFlag {
  id          String   @id @default(cuid())
  name        String   @unique @db.VarChar(100)
  enabled     Boolean  @default(false)
  description String?  @db.VarChar(500)
  rolloutPct  Int      @default(100)
  whitelist   String?  @db.Text
  updatedBy   String?  @db.VarChar(100)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  @@index([name])
}

model ConfigChangeLog {
  id         String   @id @default(cuid())
  entityType String   @db.VarChar(32)
  entityId   String   @db.VarChar(100)
  field      String   @db.VarChar(100)
  oldValue   String?  @db.Text
  newValue   String?  @db.Text
  changedBy  String?  @db.VarChar(100)
  createdAt  DateTime @default(now())

  @@index([entityType, entityId])
  @@index([createdAt])
}

model SecurityEvent {
  id        String   @id @default(cuid())
  userId    String?
  adminUserId String?
  eventType String   @db.VarChar(64)
  severity  String   @default("low") @db.VarChar(16)
  ip        String?  @db.VarChar(45)
  userAgent String?  @db.VarChar(500)
  detail    Json?
  handled   Boolean  @default(false)
  handledBy String?  @db.VarChar(100)
  createdAt DateTime @default(now())

  @@index([userId])
  @@index([eventType])
  @@index([createdAt])
}

model SensitiveWord {
  id        String   @id @default(cuid())
  word      String   @unique @db.VarChar(100)
  category  String   @default("general") @db.VarChar(32)
  riskLevel String   @default("medium") @db.VarChar(16)
  enabled   Boolean  @default(true)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([word])
  @@index([category])
}

model ContentSafetyCheck {
  id          String   @id @default(cuid())
  userId      String?  @db.VarChar(100)
  contentType String   @db.VarChar(32)
  content     String   @db.Text
  riskLevel   String   @db.VarChar(16)
  matchedWords String? @db.Text
  result      String   @default("pending") @db.VarChar(16)
  reviewerId  String?  @db.VarChar(100)
  reviewNote  String?  @db.VarChar(500)
  createdAt   DateTime @default(now())
  reviewedAt  DateTime?

  @@index([userId])
  @@index([result])
  @@index([createdAt])
}

model ContentReport {
  id          String   @id @default(cuid())
  reporterId  String
  targetType  String   @db.VarChar(32)
  targetId    String   @db.VarChar(100)
  reason      String   @db.VarChar(500)
  status      String   @default("pending") @db.VarChar(16)
  handledBy   String?  @db.VarChar(100)
  handleNote  String?  @db.VarChar(500)
  createdAt   DateTime @default(now())
  handledAt   DateTime?

  @@index([status])
  @@index([createdAt])
}