// This is your Prisma schema file
// CreaBook Database Schema with User Authentication and Data Persistence

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

datasource db {
  provider = "sqlite"
}

// User model for authentication
model User {
  id        String   @id @default(cuid())
  email     String   @unique
  password  String // Hashed password
  name      String?
  role      String   @default("USER")
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  books        Book[]
  coverDesigns CoverDesign[]
  sessions     Session[]
}

// Session model for JWT token management
model Session {
  id        String   @id @default(cuid())
  userId    String
  token     String   @unique
  expiresAt DateTime
  createdAt DateTime @default(now())

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

// Book model for storing user books
model Book {
  id             String   @id @default(cuid())
  userId         String
  title          String
  genre          String
  idea           String
  logline        String?
  outline        Json? // Stores chapter outline structure
  currentChapter Int      @default(1)
  coverId        String?
  createdAt      DateTime @default(now())
  updatedAt      DateTime @updatedAt

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

// Chapter model for storing chapter content
model Chapter {
  id          String   @id @default(cuid())
  bookId      String
  number      Int
  title       String
  summary     String
  content     String?
  isGenerated Boolean  @default(false)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  book Book @relation(fields: [bookId], references: [id], onDelete: Cascade)

  @@unique([bookId, number])
}

// Character model for storing character details
model Character {
  id         String   @id @default(cuid())
  bookId     String
  name       String
  role       String // protagonist, antagonist, supporting
  traits     String // JSON array stored as string
  motivation String?
  backstory  String?
  createdAt  DateTime @default(now())
  updatedAt  DateTime @updatedAt

  book Book @relation(fields: [bookId], references: [id], onDelete: Cascade)
}

// CoverDesign model for storing cover designs
model CoverDesign {
  id          String   @id @default(cuid())
  userId      String
  filename    String
  url         String
  prompt      String?
  genre       String?
  isGenerated Boolean  @default(false)
  width       Int?
  height      Int?
  createdAt   DateTime @default(now())

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