// 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 = "postgresql"
  url      = env("DATABASE_URL")
}

model Article {
  id        String   @id @default(cuid())
  slug      String   @unique // URL-friendly title (e.g., "Albert_Einstein")
  title     String   // Display title
  content   String   @db.Text // Full markdown content
  imageUrl  String?  // Main image URL
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
  history   ArticleHistory[]

  @@index([slug])
}

model ArticleHistory {
  id         String   @id @default(cuid())
  articleId  String
  article    Article  @relation(fields: [articleId], references: [id], onDelete: Cascade)
  oldContent String   @db.Text
  newContent String   @db.Text
  reason     String   // AI reason or "Initial article"
  createdAt  DateTime @default(now())

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

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

  @@index([createdAt])
}