// 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      = "file:./dev.db"
}

model UserPreferences {
  id                String   @id @default(cuid())
  userId            String   @unique
  substance         String   @default("nicotine")
  trackingStartDate String?
  hasCompletedSetup Boolean  @default(false)
  dailyGoal         Int?
  userName          String?
  userAge           Int?
  createdAt         DateTime @default(now())
  updatedAt         DateTime @updatedAt

  // Quit plan fields stored as JSON string
  quitPlanJson String?

  usageEntries UsageEntry[]
}

model UsageEntry {
  id        String   @id @default(cuid())
  userId    String
  date      String
  count     Int
  substance String
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  userPreferences UserPreferences? @relation(fields: [userId], references: [userId])

  @@unique([userId, date, substance])
}