// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

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

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

model User {
  id        Int      @id @default(autoincrement())
  email     String   @unique
  username  String   @unique
  password  String
  name      String?
  role      String   @default("admin")
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
  conversations Conversation[]
}

model Category {
  id        Int      @id @default(autoincrement())
  name      String   @unique
  icon      String?
  description String?
  agents    Agent[]
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

model Agent {
  id          Int      @id @default(autoincrement())
  name        String
  slug        String   @unique
  description String
  icon        String?
  categoryId  Int?
  category    Category? @relation(fields: [categoryId], references: [id])
  features    String   @default("")
  usageCount  Int      @default(0)
  status      String   @default("active")
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  conversations Conversation[]
}

model News {
  id        Int      @id @default(autoincrement())
  title     String
  content   String
  type      String   @default("news")
  published Boolean   @default(false)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

model Conversation {
  id        Int      @id @default(autoincrement())
  agentId   Int
  agent     Agent    @relation(fields: [agentId], references: [id], onDelete: Cascade)
  userId    Int?
  user      User?    @relation(fields: [userId], references: [id], onDelete: SetNull)
  title     String   @default("新对话")
  messages  Message[]
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

model Message {
  id             Int        @id @default(autoincrement())
  conversationId Int
  conversation   Conversation @relation(fields: [conversationId], references: [id], onDelete: Cascade)
  role           String     // 'user' 或 'assistant'
  content        String
  timestamp      DateTime   @default(now())
  createdAt      DateTime   @default(now())
  updatedAt      DateTime   @updatedAt
}