// Conversation and participant models

model Conversation {
  id             String    @id @default(uuid())
  title          String?
  messageCount   Int       @default(0)
  totalTokens    Int       @default(0)
  settings       Json      @default("{}")
  createdAt      DateTime  @default(now())
  updatedAt      DateTime  @updatedAt

  userId         String
  user           User                 @relation(fields: [userId], references: [id], onDelete: Cascade)
  characterId    String
  character      Character            @relation(fields: [characterId], references: [id], onDelete: Cascade)
  messages       Message[]
  vectorMemories VectorMemory[]
  storyBranches  StoryBranch[]
  participants   ConversationParticipant[]

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

model ConversationParticipant {
  id              String    @id @default(uuid())
  isActive        Boolean   @default(true)
  autoRespond     Boolean   @default(true)
  createdAt       DateTime  @default(now())

  conversationId  String
  conversation    Conversation @relation(fields: [conversationId], references: [id], onDelete: Cascade)
  characterId     String

  @@unique([conversationId, characterId])
  @@index([conversationId])
}