// Prisma schema for the personal chat DB + LLM call log

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

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

enum Provider {
  openai
  anthropic
  xai
  gemini
  hermes_agent @map("hermes-agent")
}

enum MessageRole {
  system
  user
  assistant
  tool
}

enum SearchSource {
  exa
}

enum ProjectKind {
  starred
  folder
}

model User {
  id        String   @id @default(cuid())
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  // minimal for now (single-user is fine). Keep extensible.
  handle String? @unique

  chats Chat[]
  searches Search[]
  projects Project[]
}

model Chat {
  id        String   @id @default(cuid())
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  title                  String?
  titleGenerationPending Boolean @default(false)

  initiatedProvider Provider?
  initiatedModel    String?
  lastUsedProvider  Provider?
  lastUsedModel     String?

  additionalSystemPrompt String?
  enabledTools           Json?

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

  // Forks always point directly to the single root chat, never to another fork.
  parentChat   Chat?  @relation("ChatForks", fields: [parentChatId], references: [id], onDelete: Cascade)
  parentChatId String?
  childChats   Chat[] @relation("ChatForks")

  messages Message[]
  calls    LlmCall[]
  projectItems ProjectItem[]

  @@index([userId])
  @@index([parentChatId])
  @@index([updatedAt])
}

model Message {
  id        String      @id @default(cuid())
  createdAt DateTime    @default(now())

  chat   Chat   @relation(fields: [chatId], references: [id], onDelete: Cascade)
  chatId String

  role    MessageRole
  content String

  // for tool messages or attachments later
  name     String?
  metadata Json?

  @@index([chatId, createdAt])
}

model LlmCall {
  id        String   @id @default(cuid())
  createdAt DateTime @default(now())

  chat   Chat   @relation(fields: [chatId], references: [id], onDelete: Cascade)
  chatId String

  provider Provider
  model    String

  // request/response snapshots for debugging + replay
  request  Json
  response Json?

  // usage/cost basics
  inputTokens  Int?
  outputTokens Int?
  totalTokens  Int?

  latencyMs Int?

  error   String?

  @@index([chatId, createdAt])
  @@index([provider, model, createdAt])
}

model Search {
  id        String       @id @default(cuid())
  createdAt DateTime     @default(now())
  updatedAt DateTime     @updatedAt

  title String?
  query String?
  queryNormalized String?

  source SearchSource @default(exa)

  requestId   String?
  rawResponse Json?
  latencyMs   Int?
  error       String?

  answerText        String?
  answerRequestId   String?
  answerCitations   Json?
  answerRawResponse Json?
  answerError       String?

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

  results SearchResult[]
  projectItems ProjectItem[]

  @@index([updatedAt])
  @@index([queryNormalized, updatedAt])
  @@index([userId])
}

model SearchResult {
  id        String   @id @default(cuid())
  createdAt DateTime @default(now())

  search   Search @relation(fields: [searchId], references: [id], onDelete: Cascade)
  searchId String

  rank Int

  title         String?
  url           String
  publishedDate String?
  author        String?
  text          String?
  highlights    Json?
  highlightScores Json?
  score         Float?
  favicon       String?
  image         String?

  @@index([searchId, rank])
}

model Project {
  id        String      @id @default(cuid())
  createdAt DateTime    @default(now())
  updatedAt DateTime    @updatedAt

  kind  ProjectKind @default(folder)
  title String

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

  items ProjectItem[]

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

model ProjectItem {
  id        String   @id @default(cuid())
  createdAt DateTime @default(now())

  project   Project @relation(fields: [projectId], references: [id], onDelete: Cascade)
  projectId String

  chat   Chat?   @relation(fields: [chatId], references: [id], onDelete: Cascade)
  chatId String?

  search   Search? @relation(fields: [searchId], references: [id], onDelete: Cascade)
  searchId String?

  @@unique([projectId, chatId])
  @@unique([projectId, searchId])
  @@index([projectId, createdAt])
  @@index([chatId])
  @@index([searchId])
}

// Shared personal read position for the external persistent Sybil Agent room.
// Messages remain in the agent's durable transcript, not duplicated in Sybil Chat.
model AgentReadState {
  sourceId  String?
  id        String @id
  cursor    String @default("0")
  updatedAt DateTime @updatedAt
}

// One server-derived shared principal. Transport payloads are secret DB data.
model AgentPushInstallation {
  id           String @id
  ownerEpoch   String
  transport    String
  payload      String
  fingerprint  String
  enabled      Boolean @default(false)
  version      Int @default(1)
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt
  lastClearAt  DateTime?
  revokedAt    DateTime?
  @@index([ownerEpoch, enabled])
  @@index([fingerprint])
}

model AgentPushPresence {
  id                String @id
  ownerEpoch        String
  sequence          Int
  visible           Boolean
  focused           Boolean
  lastInteractionAt DateTime?
  inactiveUntil     DateTime?
  expiresAt         DateTime
  @@index([ownerEpoch, expiresAt])
}

model AgentPushConnection {
  id         String @id
  ownerEpoch String
  kind       String
  sessionId  String?
  expiresAt  DateTime
  @@index([ownerEpoch, expiresAt])
}

model AgentPushCoordinator {
  id                  String @id
  ownerEpoch          String
  sourceId            String?
  cursor              String @default("0")
  quarantined         Boolean @default(false)
  contextObservedAt   DateTime?
  latestUserMessageAt DateTime?
  localPromptAt       DateTime?
  nativeActive        Boolean @default(false)
  nativeUnknown       Boolean @default(true)
  unknownSince        DateTime?
  uncertain           Boolean @default(true)
  lockOwner           String?
  lockUntil           DateTime?
}

model AgentPushDelivery {
  id                  String @id
  ownerEpoch          String
  installationId      String
  installationVersion Int
  sourceId            String
  messageId           String
  cursor              String
  kind                String
  trigger             String
  priority            Int @default(0)
  status              String @default("pending")
  attempts            Int @default(0)
  createdAt           DateTime @default(now())
  dueAt               DateTime
  expiresAt           DateTime
  updatedAt           DateTime @updatedAt
  outcome             String?
  lastSuppressionReason     String?
  lastSuppressionClientKind String?
  lastSuppressedAt          DateTime?
  @@index([status, dueAt])
  @@index([installationId, status])
  @@index([ownerEpoch, sourceId, cursor])
}