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

datasource db {
  provider   = "postgresql"
  url        = env("DATABASE_URL")
  extensions = [vector]
}

model User {
  id                    String                  @id @default(cuid())
  name                  String?
  email                 String                  @unique
  emailVerified         DateTime?
  password              String?
  role                  String                  @default("USER")
  sessionVersion        Int                     @default(0)
  image                 String?
  theme                 String                  @default("light")
  resetToken            String?                 @unique
  resetTokenExpiry      DateTime?
  createdAt             DateTime                @default(now())
  updatedAt             DateTime                @updatedAt
  cardSizeMode          String                  @default("variable")
  accentColor           String                  @default("#A47148")
  onboardingCompleted   Boolean                 @default(false)
  onboardingStep        Int                     @default(0)
  accounts              Account[]
  agents                Agent[]
  aiFeedback            AiFeedback[]
  brainstormActivities  BrainstormActivity[]
  brainstormParticipant BrainstormParticipant[]
  brainstormSessions    BrainstormSession[]
  canvases              Canvas[]
  conversations         Conversation[]
  labels                Label[]
  memoryEchoInsights    MemoryEchoInsight[]
  notes                 Note[]
  noteHistories         NoteHistory[]
  sentShares            NoteShare[]             @relation("SentShares")
  receivedShares        NoteShare[]             @relation("ReceivedShares")
  sentBrainstormShares  BrainstormShare[]       @relation("SentBrainstormShares")
  receivedBrainstormShares BrainstormShare[]    @relation("ReceivedBrainstormShares")
  notebooks             Notebook[]
  notifications         Notification[]
  sessions              Session[]
  aiSettings            UserAISettings?
  workflows             Workflow[]
  subscription          Subscription?
  usageLogs             UsageLog[]
  apiKeys               UserAPIKey[]
  aiConsentLogs         AiConsentLog[]
  noteClusters          NoteCluster[]
  bridgeNotes           BridgeNote[]
  bridgeSuggestions     BridgeSuggestion[]
  flashcardDecks        FlashcardDeck[]
  errorLogs             ErrorLog[]
}

model Account {
  userId            String
  type              String
  provider          String
  providerAccountId String
  refresh_token     String?
  access_token      String?
  expires_at        Int?
  token_type        String?
  scope             String?
  id_token          String?
  session_state     String?
  createdAt         DateTime @default(now())
  updatedAt         DateTime @updatedAt
  user              User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@id([provider, providerAccountId])
}

model Session {
  sessionToken String   @unique
  userId       String
  expires      DateTime
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt
  user         User     @relation(fields: [userId], references: [id], onDelete: Cascade)
}

model VerificationToken {
  identifier String
  token      String
  expires    DateTime

  @@id([identifier, token])
}

model Notebook {
  id            String         @id @default(cuid())
  name          String
  icon          String?
  color         String?
  order         Int
  userId        String
  createdAt     DateTime       @default(now())
  updatedAt     DateTime       @updatedAt
  parentId      String?
  trashedAt     DateTime?
  agents        Agent[]
  conversations Conversation[]
  labels        Label[]
  notes         Note[]
  parent        Notebook?      @relation("NotebookTree", fields: [parentId], references: [id], onDelete: Cascade)
  children      Notebook[]     @relation("NotebookTree")
  user          User           @relation(fields: [userId], references: [id], onDelete: Cascade)
  workflows     Workflow[]
  flashcardDecks FlashcardDeck[]
  schema        NotebookSchema?
  site          NotebookSite?

  @@index([userId, order])
  @@index([userId])
  @@index([parentId])
  @@index([trashedAt])
}

model NotebookSite {
  id              String   @id @default(cuid())
  notebookId      String   @unique
  slug            String   @unique
  isPublic        Boolean  @default(true)
  publishedAt     DateTime @default(now())
  updatedAt       DateTime @updatedAt
  template        String   @default("magazine")
  selectedNoteIds String   // JSON array de note IDs ordonnés
  description     String?  // Résumé IA du carnet
  notebook        Notebook @relation(fields: [notebookId], references: [id], onDelete: Cascade)
}

model Label {
  id         String    @id @default(cuid())
  name       String
  color      String    @default("gray")
  notebookId String?
  userId     String?
  createdAt  DateTime  @default(now())
  updatedAt  DateTime  @updatedAt
  type       String    @default("user")
  notebook   Notebook? @relation(fields: [notebookId], references: [id], onDelete: Cascade)
  user       User?     @relation(fields: [userId], references: [id], onDelete: Cascade)
  notes      Note[]    @relation("LabelToNote")

  @@unique([notebookId, name])
  @@index([notebookId])
  @@index([userId])
}

model Note {
  id                         String                   @id @default(cuid())
  title                      String?
  content                    String
  color                      String                   @default("default")
  isPinned                   Boolean                  @default(false)
  isArchived                 Boolean                  @default(false)
  type                       String                   @default("richtext")
  dismissedFromRecent        Boolean                  @default(false)
  checkItems                 String?
  labels                     String?
  images                     String?
  links                      String?
  reminder                   DateTime?
  isReminderDone             Boolean                  @default(false)
  reminderRecurrence         String?
  reminderLocation           String?
  isMarkdown                 Boolean                  @default(false)
  size                       String                   @default("small")
  sharedWith                 String?
  userId                     String?
  order                      Int                      @default(0)
  notebookId                 String?
  createdAt                  DateTime                 @default(now())
  updatedAt                  DateTime                 @updatedAt
  contentUpdatedAt           DateTime                 @default(now())
  autoGenerated              Boolean?
  aiProvider                 String?
  aiConfidence               Int?
  language                   String?
  languageConfidence         Float?
  lastAiAnalysis             DateTime?
  trashedAt                  DateTime?
  historyEnabled             Boolean                  @default(false)
  isPublic                   Boolean                  @default(false)
  publicSlug                 String?                  @unique
  publishedAt                DateTime?
  /// HTML rendu pour la page publique (publication IA)
  publishedContent           String?
  /// magazine | brief | essay
  publishedTemplate          String?
  /// Hash du contenu source au moment de la publication
  publishedSourceHash        String?
  /// URL d'origine pour les clips web (Web Clipper)
  sourceUrl                  String?
  /// Note de démonstration insérée lors de l'onboarding
  isDemo                     Boolean                  @default(false)
  /// Illustration SVG (sanitized) for editorial feed thumbnail — optional, peut être généré par IA
  illustrationSvg            String?
  tsv                        Unsupported("tsvector")?
  aiFeedback                 AiFeedback[]
  convertedBrainstormIdeas   BrainstormIdea[]         @relation("ConvertedBrainstormIdea")
  exportedBrainstormSessions BrainstormSession[]      @relation("ExportedBrainstorm")
  sourceBrainstormSessions   BrainstormSession[]      @relation("SourceBrainstorm")
  memoryEchoAsNote1          MemoryEchoInsight[]      @relation("EchoNote1")
  memoryEchoAsNote2          MemoryEchoInsight[]      @relation("EchoNote2")
  notebook                   Notebook?                @relation(fields: [notebookId], references: [id])
  user                       User?                    @relation(fields: [userId], references: [id], onDelete: Cascade)
  noteEmbedding              NoteEmbedding?
  historyEntries             NoteHistory[]
  shares                     NoteShare[]
  labelRelations             Label[]                  @relation("LabelToNote")
  attachments                NoteAttachment[]
  brainstormNoteRefs         BrainstormNoteRef[]
  outgoingLinks              NoteLink[]               @relation("SourceLinks")
  incomingLinks              NoteLink[]               @relation("TargetLinks")
  clusterMemberships         ClusterMember[]
  bridgeNote                 BridgeNote?
  sourceLiveBlocks           LiveBlockRef[]           @relation("SourceLiveBlocks")
  targetLiveBlocks           LiveBlockRef[]           @relation("TargetLiveBlocks")
  flashcards                 Flashcard[]
  properties                 NoteProperty[]
  embeddingChunks            NoteEmbeddingChunk[]

  @@index([isPinned])
  @@index([isArchived])
  @@index([trashedAt])
  @@index([order])
  @@index([reminder])
  @@index([userId])
  @@index([userId, notebookId])
}

model LiveBlockRef {
  id             String   @id @default(cuid())
  sourceNoteId   String
  blockId        String
  targetNoteId   String
  createdAt      DateTime @default(now())
  sourceNote     Note     @relation("SourceLiveBlocks", fields: [sourceNoteId], references: [id], onDelete: Cascade)
  targetNote     Note     @relation("TargetLiveBlocks", fields: [targetNoteId], references: [id], onDelete: Cascade)

  @@index([sourceNoteId, blockId])
  @@index([targetNoteId])
}

model NoteHistory {
  id         String   @id @default(cuid())
  noteId     String
  userId     String
  version    Int
  reason     String?
  title      String?
  content    String
  color      String
  isPinned   Boolean
  isArchived Boolean
  type       String
  checkItems String?
  labels     String?
  images     String?
  links      String?
  isMarkdown Boolean
  size       String
  notebookId String?
  createdAt  DateTime @default(now())
  note       Note     @relation(fields: [noteId], references: [id], onDelete: Cascade)
  user       User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([noteId, version])
  @@index([noteId, createdAt(sort: Desc)])
  @@index([userId, noteId, createdAt(sort: Desc)])
}

model NoteShare {
  id          String    @id @default(cuid())
  noteId      String
  userId      String
  sharedBy    String
  status      String    @default("pending")
  permission  String    @default("view")
  notifiedAt  DateTime?
  respondedAt DateTime?
  createdAt   DateTime  @default(now())
  updatedAt   DateTime  @updatedAt
  note        Note      @relation(fields: [noteId], references: [id], onDelete: Cascade)
  sharer      User      @relation("SentShares", fields: [sharedBy], references: [id], onDelete: Cascade)
  user        User      @relation("ReceivedShares", fields: [userId], references: [id], onDelete: Cascade)

  @@unique([noteId, userId])
  @@index([userId])
  @@index([status])
  @@index([sharedBy])
}

model SystemConfig {
  key   String @id
  value String
}

model AiFeedback {
  id               String   @id @default(cuid())
  noteId           String
  userId           String?
  feedbackType     String
  feature          String
  originalContent  String
  correctedContent String?
  metadata         String?
  createdAt        DateTime @default(now())
  note             Note     @relation(fields: [noteId], references: [id], onDelete: Cascade)
  user             User?    @relation(fields: [userId], references: [id], onDelete: Cascade)

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

model MemoryEchoInsight {
  id              String   @id @default(cuid())
  userId          String?
  note1Id         String
  note2Id         String
  similarityScore Float
  insight         String
  insightDate     DateTime @default(now())
  viewed          Boolean  @default(false)
  feedback        String?
  dismissed       Boolean  @default(false)
  note1           Note     @relation("EchoNote1", fields: [note1Id], references: [id], onDelete: Cascade)
  note2           Note     @relation("EchoNote2", fields: [note2Id], references: [id], onDelete: Cascade)
  user            User?    @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([userId, insightDate])
  @@index([userId, insightDate])
  @@index([userId, dismissed])
}

model UserAISettings {
  userId               String  @id
  titleSuggestions     Boolean @default(true)
  semanticSearch       Boolean @default(true)
  paragraphRefactor    Boolean @default(true)
  memoryEcho           Boolean @default(true)
  memoryEchoFrequency  String  @default("daily")
  aiProvider           String  @default("auto")
  preferredLanguage    String  @default("auto")
  fontSize             String  @default("medium")
  demoMode             Boolean @default(false)
  showRecentNotes      Boolean @default(true)
  emailNotifications   Boolean @default(false)
  desktopNotifications Boolean @default(false)
  anonymousAnalytics   Boolean @default(false)
  autoLabeling         Boolean @default(true)
  fontFamily           String  @default("inter")
  languageDetection    Boolean @default(true)
  noteHistory          Boolean @default(false)
  noteHistoryMode      String  @default("manual")
  autoSave             Boolean @default(true)
  aiProcessingConsent  Boolean @default(false)
  svgComplexity        String  @default("simple")
  integrationTokens    Json?   // Stores third-party integration tokens (Readwise, Calendar, etc.)
  user                 User    @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([memoryEcho])
  @@index([aiProvider])
  @@index([memoryEchoFrequency])
  @@index([preferredLanguage])
}

model AiConsentLog {
  id        String   @id @default(cuid())
  userId    String
  consent   Boolean  @default(true)
  ipAddress String?
  userAgent String?
  createdAt DateTime @default(now())
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
}

model NoteEmbedding {
  id        String   @id @default(cuid())
  noteId    String                         @unique
  embedding Unsupported("vector(1536)")?
  createdAt DateTime @default(now())
  note      Note     @relation(fields: [noteId], references: [id], onDelete: Cascade)

  @@index([noteId])
}

model NoteEmbeddingChunk {
  id             String                       @id @default(cuid())
  noteId         String
  fragmentId     String
  chunkIndex     Int
  content        String
  charCount      Int
  embedding      Unsupported("vector(1536)")?
  embeddingModel String?                       @default("text-embedding-3-small")
  createdAt      DateTime                       @default(now())
  updatedAt      DateTime                       @updatedAt
  note           Note                           @relation(fields: [noteId], references: [id], onDelete: Cascade)

  @@unique([noteId, fragmentId])
  @@index([noteId])
  @@index([fragmentId])
}

model NoteLink {
  id              String   @id @default(cuid())
  sourceNoteId    String
  targetNoteId    String
  contextSnippet  String?
  createdAt       DateTime @default(now())
  sourceNote      Note     @relation("SourceLinks", fields: [sourceNoteId], references: [id], onDelete: Cascade)
  targetNote      Note     @relation("TargetLinks", fields: [targetNoteId], references: [id], onDelete: Cascade)

  @@unique([sourceNoteId, targetNoteId])
  @@index([sourceNoteId])
  @@index([targetNoteId])
}

model Agent {
  id               String        @id @default(cuid())
  name             String
  description      String?
  type             String?       @default("scraper")
  role             String
  sourceUrls       String?
  frequency        String        @default("manual")
  lastRun          DateTime?
  nextRun          DateTime?
  isEnabled        Boolean       @default(true)
  targetNotebookId String?
  sourceNotebookId String?
  tools            String?       @default("[]")
  maxSteps         Int           @default(10)
  notifyEmail      Boolean       @default(false)
  includeImages    Boolean       @default(false)
  userId           String
  createdAt        DateTime      @default(now())
  updatedAt        DateTime      @updatedAt
  scheduledTime    String?       @default("08:00")
  scheduledDay     Int?
  timezone         String?
  sourceNoteIds    String?
  slideStyle       String?
  slideTheme       String?
  notebook         Notebook?     @relation(fields: [targetNotebookId], references: [id])
  user             User          @relation(fields: [userId], references: [id], onDelete: Cascade)
  actions          AgentAction[]

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

model AgentAction {
  id         String   @id @default(cuid())
  agentId    String
  status     String   @default("pending")
  result     String?
  log        String?
  input      String?
  toolLog    String?
  tokensUsed Int?
  createdAt  DateTime @default(now())
  agent      Agent    @relation(fields: [agentId], references: [id], onDelete: Cascade)

  @@index([agentId])
}

model Conversation {
  id              String        @id @default(cuid())
  title           String?
  userId          String
  notebookId      String?
  summary         String?
  summaryUpTo     String?
  createdAt       DateTime      @default(now())
  updatedAt       DateTime      @updatedAt
  messages        ChatMessage[]
  notebook        Notebook?     @relation(fields: [notebookId], references: [id])
  user            User          @relation(fields: [userId], references: [id], onDelete: Cascade)

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

model ChatMessage {
  id             String       @id @default(cuid())
  conversationId String
  role           String
  content        String
  createdAt      DateTime     @default(now())
  conversation   Conversation @relation(fields: [conversationId], references: [id], onDelete: Cascade)

  @@index([conversationId])
}

model Canvas {
  id        String   @id @default(cuid())
  name      String
  data      String
  userId    String
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId])
}

model Workflow {
  id          String        @id @default(cuid())
  name        String
  description String?
  graph       String        @default("{\"nodes\":[],\"edges\":[]}")
  isEnabled   Boolean       @default(true)
  userId      String
  notebookId  String?
  createdAt   DateTime      @default(now())
  updatedAt   DateTime      @updatedAt
  notebook    Notebook?     @relation(fields: [notebookId], references: [id])
  user        User          @relation(fields: [userId], references: [id], onDelete: Cascade)
  runs        WorkflowRun[]

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

model WorkflowRun {
  id         String   @id @default(cuid())
  workflowId String
  status     String   @default("running")
  log        String?
  createdAt  DateTime @default(now())
  workflow   Workflow @relation(fields: [workflowId], references: [id], onDelete: Cascade)

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

model Notification {
  id        String   @id @default(cuid())
  userId    String
  type      String
  title     String
  message   String?
  read      Boolean  @default(false)
  actionUrl String?
  relatedId String?
  createdAt DateTime @default(now())
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId, read])
  @@index([userId, createdAt])
}

model BrainstormSession {
  id               String    @id @default(cuid())
  seedIdea         String
  sourceNoteId     String?
  contextNoteIds   String?
  exportedNoteId   String?
  userId           String
  inviteToken      String?   @unique
  inviteExpiry     DateTime?
  liveblocksRoomId String?
  isPublic         Boolean   @default(false)
  guestCanEdit     Boolean   @default(false)
  status           String    @default("active")
  createdAt        DateTime  @default(now())
  updatedAt        DateTime  @updatedAt
  ideas            BrainstormIdea[]
  participants     BrainstormParticipant[]
  activities       BrainstormActivity[]
  shares           BrainstormShare[]
  snapshots        BrainstormSnapshot[]
  sourceNote       Note?     @relation("SourceBrainstorm", fields: [sourceNoteId], references: [id])
  exportedNote     Note?     @relation("ExportedBrainstorm", fields: [exportedNoteId], references: [id])
  user             User      @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId])
  @@index([userId, createdAt])
  @@index([inviteToken])
  @@index([isPublic])
}

model BrainstormIdea {
  id                String              @id @default(cuid())
  sessionId         String
  waveNumber        Int
  title             String
  description       String
  connectionToSeed  String?
  noveltyScore      Int?
  parentIdeaId      String?
  convertedToNoteId String?
  relatedNoteIds    String?
  status            String              @default("active")
  positionX         Float?
  positionY         Float?
  isStarred         Boolean             @default(false)
  createdAt         DateTime            @default(now())
  createdBy         String?
  createdByType     String?             @default("ai")
  convertedNote     Note?               @relation("ConvertedBrainstormIdea", fields: [convertedToNoteId], references: [id])
  parentIdea        BrainstormIdea?     @relation("IdeaTree", fields: [parentIdeaId], references: [id])
  children          BrainstormIdea[]    @relation("IdeaTree")
  session           BrainstormSession   @relation(fields: [sessionId], references: [id], onDelete: Cascade)
  noteRefs          BrainstormNoteRef[]

  @@index([sessionId])
  @@index([waveNumber])
  @@index([status])
  @@index([parentIdeaId])
  @@index([sessionId, status])
  @@index([sessionId, waveNumber, createdAt])
}

model BrainstormNoteRef {
  id          String         @id @default(cuid())
  ideaId      String
  noteId      String?
  relation    String
  explanation String
  verdict     String         @default("unresolved")
  createdAt   DateTime       @default(now())
  visibility  String         @default("participants")
  idea        BrainstormIdea @relation(fields: [ideaId], references: [id], onDelete: Cascade)
  note        Note?          @relation(fields: [noteId], references: [id])

  @@index([ideaId])
  @@index([noteId])
  @@index([noteId, relation])
  @@index([visibility])
}

model BrainstormParticipant {
  id         String            @id @default(cuid())
  sessionId  String
  userId     String
  role       String            @default("viewer")
  joinedAt   DateTime          @default(now())
  lastSeenAt DateTime          @default(now())
  session    BrainstormSession @relation(fields: [sessionId], references: [id], onDelete: Cascade)
  user       User              @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([sessionId, userId])
  @@index([sessionId])
  @@index([userId])
  @@index([sessionId, userId, role])
}

model BrainstormActivity {
  id        String            @id @default(cuid())
  sessionId String
  userId    String?
  action    String
  details   String?
  createdAt DateTime          @default(now())
  session   BrainstormSession @relation(fields: [sessionId], references: [id], onDelete: Cascade)
  user      User?             @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([sessionId, createdAt], map: "BrainstormActivity_sessionId_createdAt_asc_idx")
  @@index([sessionId, createdAt(sort: Desc)], map: "BrainstormActivity_sessionId_createdAt_desc_idx")
  @@index([sessionId, createdAt])
}

model BrainstormShare {
  id          String    @id @default(cuid())
  sessionId   String
  userId      String
  sharedBy    String
  status      String    @default("pending")
  permission  String    @default("editor")
  notifiedAt  DateTime?
  respondedAt DateTime?
  createdAt   DateTime  @default(now())
  updatedAt   DateTime  @updatedAt
  session     BrainstormSession @relation(fields: [sessionId], references: [id], onDelete: Cascade)
  sharer      User              @relation("SentBrainstormShares", fields: [sharedBy], references: [id], onDelete: Cascade)
  user        User              @relation("ReceivedBrainstormShares", fields: [userId], references: [id], onDelete: Cascade)

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

model BrainstormSnapshot {
  id          String   @id @default(cuid())
  sessionId   String
  activityId  String?
  step        Int
  label       String?
  ideaGraph   String
  createdAt   DateTime @default(now())
  session     BrainstormSession @relation(fields: [sessionId], references: [id], onDelete: Cascade)

  @@index([sessionId, step])
  @@index([sessionId, createdAt])
  @@index([activityId])
}

model NoteAttachment {
  id          String   @id @default(cuid())
  noteId      String
  fileName    String
  fileType    String
  fileSize    Int
  filePath    String
  mimeType    String
  status      String   @default("pending")
  pageCount   Int?
  error       String?
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  note        Note     @relation(fields: [noteId], references: [id], onDelete: Cascade)
  chunks      DocumentChunk[]

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

model DocumentChunk {
  id           String   @id @default(cuid())
  attachmentId String
  content      String
  chunkIndex   Int
  pageNumber   Int?
  startChar    Int?
  endChar      Int?
  metadata     String?
  embedding    Unsupported("vector(1536)")?
  createdAt    DateTime @default(now())
  attachment   NoteAttachment @relation(fields: [attachmentId], references: [id], onDelete: Cascade)

  @@index([attachmentId])
  @@index([attachmentId, chunkIndex])
}

// ===== BYOK (Story 3.5) =====

model UserAPIKey {
  id           String   @id @default(cuid())
  userId       String
  provider     String
  alias        String   @default("")
  encryptedKey String
  keyHash      String
  model        String?
  baseUrl      String?  @db.Text
  isActive     Boolean  @default(true)
  lastUsedAt   DateTime?
  lastUsedFor  String?
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt

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

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

// ===== SUBSCRIPTION MODELS =====

enum SubscriptionTier {
  BASIC
  PRO
  BUSINESS
  ENTERPRISE
}

enum SubscriptionStatus {
  ACTIVE
  PAST_DUE
  CANCELED
  TRIALING
  INACTIVE
}

model Subscription {
  id                    String   @id @default(cuid())
  userId                String   @unique
  tier                  SubscriptionTier @default(BASIC)
  status                SubscriptionStatus @default(ACTIVE)

  stripeCustomerId      String?  @unique
  stripeSubscriptionId  String?  @unique
  stripePriceId         String?

  trialEndsAt           DateTime?
  currentPeriodStart    DateTime
  currentPeriodEnd      DateTime

  canceledAt            DateTime?
  cancelAtPeriodEnd     Boolean  @default(false)

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

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

model UsageLog {
  id             String   @id @default(cuid())
  userId         String
  feature        String
  periodStart    DateTime
  periodEnd      DateTime
  requestsCount  Int      @default(0)
  tokensUsed     Int      @default(0)

  syncedAt       DateTime?
  metadata       String?
  createdAt      DateTime @default(now())

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

  @@unique([userId, feature, periodStart])
  @@index([userId, periodStart])
  @@index([periodStart])
}

model FeatureFlag {
  id        String   @id @default(cuid())
  key       String   @unique
  enabled   Boolean  @default(false)
  tiers     String[]
  metadata  String?
  updatedAt DateTime @updatedAt
}

model PlanEntitlement {
  id         String           @id @default(cuid())
  tier       SubscriptionTier
  feature    String
  limitValue Int?
  createdAt  DateTime         @default(now())
  updatedAt  DateTime         @updatedAt

  @@unique([tier, feature])
  @@index([tier])
}

// ===== CLUSTERING & BRIDGE NOTES =====

model NoteCluster {
  id              String   @id @default(cuid())
  userId          String
  clusterId       Int      // Cluster number for this user (0, 1, 2, ...)
  name            String?  // Auto-generated cluster name
  centroid        Unsupported("vector(1536)")? // Optional: centroid embedding for cluster
  noteCount       Int      @default(0)
  lastCalculated  DateTime @default(now())
  createdAt       DateTime @default(now())
  updatedAt       DateTime @updatedAt

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

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

model ClusterMember {
  id              String   @id @default(cuid())
  userId          String
  noteId          String
  clusterId       Int      // Cluster number
  membershipScore Float    @default(0.0) // How strongly this note belongs to the cluster
  isCentral       Boolean  @default(false) // Is this a central note in the cluster?
  createdAt       DateTime @default(now())

  note            Note     @relation(fields: [noteId], references: [id], onDelete: Cascade)

  @@index([userId, clusterId])
  @@index([noteId])
  @@unique([noteId, clusterId])
}

model BridgeNote {
  id                String   @id @default(cuid())
  userId            String
  noteId            String   @unique
  bridgeScore       Float    // len(clusters_touched) / max_clusters
  clustersConnected String   // JSON array: ["0", "2", "5"]
  lastCalculated    DateTime @default(now())
  createdAt         DateTime @default(now())
  updatedAt         DateTime @updatedAt

  note              Note     @relation(fields: [noteId], references: [id], onDelete: Cascade)
  user              User     @relation(fields: [userId], references: [id], onDelete: Cascade)

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

model BridgeSuggestion {
  id                String   @id @default(cuid())
  userId            String
  clusterAId        Int
  clusterBId        Int
  clusterAName      String
  clusterBName      String
  suggestedTitle    String
  suggestedContent  String   // @default(dbgenerated)
  justification     String   // Why this connection makes sense
  isDismissed       Boolean  @default(false)
  createdAt         DateTime @default(now())

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

  @@index([userId])
  @@index([userId, isDismissed])
  @@index([clusterAId, clusterBId])
}

model NotebookSchema {
  id           String             @id @default(cuid())
  notebookId   String             @unique
  viewSettings String?
  createdAt    DateTime           @default(now())
  updatedAt    DateTime           @updatedAt
  notebook     Notebook           @relation(fields: [notebookId], references: [id], onDelete: Cascade)
  properties   NotebookProperty[]
}

model NotebookProperty {
  id         String           @id @default(cuid())
  schemaId   String
  name       String
  type       String
  options    String?
  position   Int
  schema     NotebookSchema   @relation(fields: [schemaId], references: [id], onDelete: Cascade)
  noteValues NoteProperty[]

  @@index([schemaId, position])
}

model NoteProperty {
  id         String           @id @default(cuid())
  noteId     String
  propertyId String
  value      String?
  note       Note             @relation(fields: [noteId], references: [id], onDelete: Cascade)
  property   NotebookProperty @relation(fields: [propertyId], references: [id], onDelete: Cascade)

  @@unique([noteId, propertyId])
  @@index([noteId])
  @@index([propertyId])
}

model FlashcardDeck {
  id         String      @id @default(cuid())
  userId     String
  notebookId String?
  name       String
  createdAt  DateTime    @default(now())
  updatedAt  DateTime    @updatedAt
  flashcards Flashcard[]
  user       User        @relation(fields: [userId], references: [id], onDelete: Cascade)
  notebook   Notebook?   @relation(fields: [notebookId], references: [id], onDelete: SetNull)

  @@index([userId])
}

model Flashcard {
  id             String            @id @default(cuid())
  deckId         String
  noteId         String?
  front          String
  back           String
  type           String            @default("qa")
  interval       Int               @default(1)
  easinessFactor Float             @default(2.5)
  nextReviewAt   DateTime          @default(now())
  createdAt      DateTime          @default(now())
  updatedAt      DateTime          @updatedAt
  deck           FlashcardDeck     @relation(fields: [deckId], references: [id], onDelete: Cascade)
  note           Note?             @relation(fields: [noteId], references: [id], onDelete: SetNull)
  reviews        FlashcardReview[]

  @@index([deckId])
  @@index([noteId])
  @@index([nextReviewAt])
}

model FlashcardReview {
  id         String    @id @default(cuid())
  cardId     String
  grade      Int
  reviewedAt DateTime  @default(now())
  card       Flashcard @relation(fields: [cardId], references: [id], onDelete: Cascade)

  @@index([cardId])
  @@index([reviewedAt])
}

model AuditLog {
  id        String   @id @default(cuid())
  userId    String?
  action    String
  resource  String?
  metadata  Json?
  ip        String?
  userAgent String?
  createdAt DateTime @default(now())

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

model ErrorLog {
  id          String   @id @default(cuid())
  userId      String?
  message     String
  stack       String?  @db.Text
  url         String?
  userAgent   String?  @db.Text
  component   String?  // Component name where error occurred
  severity    String   @default("error") // error, warning, info
  resolved    Boolean  @default(false)
  createdAt   DateTime @default(now())

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

  @@index([userId])
  @@index([severity])
  @@index([createdAt])
  @@index([resolved])
}