datasource db {
  provider = "postgresql"
}

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

// =====================
// AUTH & SUBSCRIPTIONS
// =====================
model Plan {
  id           String   @id // e.g., 'free', 'pro', 'master'
  name         String   @unique
  displayName  String
  price        Float
  description  String
  maxProjects  Int      // -1 for unlimited
  maxAiActions Int      // -1 for unlimited
  features     String[]
  isPopular    Boolean  @default(false)
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt

  users        User[]
}

model User {
  id             String   @id @default(cuid())
  name           String?
  email          String   @unique
  hashedPassword String
  bio            String?
  
  // Legacy string plan (temporarily kept to avoid DB drop errors)
  plan           String   @default("free")

  // New Subscription
  planId         String?  @default("free")
  subscriptionPlan Plan?  @relation(fields: [planId], references: [id])
  
  aiActionsUsed  Int      @default(0)
  dailyWordGoal  Int      @default(500)
  writingStreak  Int      @default(0)
  lastWriteDate  DateTime?
  createdAt      DateTime @default(now())
  updatedAt      DateTime @updatedAt

  projects Project[]
  sessions Session[]
}

model Session {
  id           String   @id @default(cuid())
  sessionToken String   @unique
  userId       String
  expires      DateTime
  user         User     @relation(fields: [userId], references: [id], onDelete: Cascade)
}

// =====================
// DATA
// =====================
model Project {
  id         String   @id @default(cuid())
  title      String
  author     String
  settings   Json?
  styleGuide String?
  createdAt  DateTime @default(now())
  updatedAt  DateTime @updatedAt

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

  chapters        Chapter[]
  entities        Entity[]
  ideas           Idea[]
  plotNodes       PlotNode[]
  plotConnections PlotConnection[]
}

model Chapter {
  id         String @id @default(cuid())
  title      String
  content    String @default("")
  summary    String?
  orderIndex Int    @default(0)

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

model Entity {
  id           String  @id @default(cuid())
  type         String
  name         String
  description  String  @default("")
  details      String  @default("")
  storyContext String?
  attributes   Json?
  customValues Json?

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

model Idea {
  id          String   @id @default(cuid())
  title       String
  description String   @default("")
  status      String   @default("todo")
  category    String   @default("plot")
  createdAt   DateTime @default(now())

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

model PlotNode {
  id          String  @id @default(cuid())
  x           Float
  y           Float
  title       String
  description String  @default("")
  color       String  @default("#3b82f6")
  type        String?

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

model PlotConnection {
  id     String @id @default(cuid())
  source String
  target String

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