// KetoPath — schema Prisma
// Schema iniziale: solo le 3 entità di base (User, Profile, Preferences).
// Le altre entità del PRD §8 (MealPlan, Recipe, WeightEntry, ecc.) verranno
// aggiunte in step successivi, allineate alle feature corrispondenti.

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

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

enum Role {
  USER
  COACH
}

enum Gender {
  MALE
  FEMALE
  OTHER
}

enum ActivityLevel {
  SEDENTARY
  LIGHT
  MODERATE
  INTENSE
}

enum Phase {
  INTENSIVE
  TRANSITION
  MAINTENANCE
}

enum CookingTime {
  LOW
  MEDIUM
  HIGH
}

enum FastingProtocol {
  FOURTEEN_TEN
  SIXTEEN_EIGHT
  EIGHTEEN_SIX
  TWENTY_FOUR
  ESE_24
  FIVE_TWO
}

model User {
  id            String   @id @default(cuid())
  email         String   @unique
  emailVerified Boolean  @default(false) @map("email_verified")
  name          String?
  image         String?
  role          Role     @default(USER)
  createdAt     DateTime @default(now()) @map("created_at")
  updatedAt     DateTime @updatedAt @map("updated_at")

  profile     Profile?
  preferences Preferences?
  sessions    Session[]
  accounts    Account[]

  @@map("users")
}

// Better Auth — sessione utente firmata.
model Session {
  id        String   @id @default(cuid())
  userId    String   @map("user_id")
  token     String   @unique
  expiresAt DateTime @map("expires_at")
  ipAddress String?  @map("ip_address")
  userAgent String?  @map("user_agent")
  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")

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

  @@map("sessions")
}

// Better Auth — credenziali (email+password) o account OAuth.
// Per email+password il provider è 'credential' e la password (hash scrypt)
// è salvata nel campo `password`.
model Account {
  id                    String    @id @default(cuid())
  userId                String    @map("user_id")
  accountId             String    @map("account_id")
  providerId            String    @map("provider_id")
  accessToken           String?   @map("access_token")
  refreshToken          String?   @map("refresh_token")
  idToken               String?   @map("id_token")
  accessTokenExpiresAt  DateTime? @map("access_token_expires_at")
  refreshTokenExpiresAt DateTime? @map("refresh_token_expires_at")
  scope                 String?
  password              String?
  createdAt             DateTime  @default(now()) @map("created_at")
  updatedAt             DateTime  @updatedAt @map("updated_at")

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

  @@unique([providerId, accountId])
  @@map("accounts")
}

// Better Auth — token monouso (email verification, password reset, magic link).
model Verification {
  id         String   @id @default(cuid())
  identifier String
  value      String
  expiresAt  DateTime @map("expires_at")
  createdAt  DateTime @default(now()) @map("created_at")
  updatedAt  DateTime @updatedAt @map("updated_at")

  @@unique([identifier, value])
  @@map("verifications")
}

model Profile {
  id              String        @id @default(cuid())
  userId          String        @unique @map("user_id")
  age             Int
  gender          Gender
  heightCm        Int           @map("height_cm")
  weightStartKg   Decimal       @map("weight_start_kg") @db.Decimal(5, 2)
  weightCurrentKg Decimal       @map("weight_current_kg") @db.Decimal(5, 2)
  weightGoalKg    Decimal       @map("weight_goal_kg") @db.Decimal(5, 2)
  activityLevel   ActivityLevel @map("activity_level")
  targetDate      DateTime?     @map("target_date") @db.Date
  currentPhase    Phase         @default(INTENSIVE) @map("current_phase")
  createdAt       DateTime      @default(now()) @map("created_at")
  updatedAt       DateTime      @updatedAt @map("updated_at")

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

  @@map("profiles")
}

model Preferences {
  id                   String           @id @default(cuid())
  userId               String           @unique @map("user_id")
  exclusions           String[]         @default([])
  cuisinePreferences   String[]         @default([]) @map("cuisine_preferences")
  cookingTime          CookingTime      @default(MEDIUM) @map("cooking_time")
  fastingProtocol      FastingProtocol? @map("fasting_protocol")
  notificationSettings Json             @default("{}") @map("notification_settings")
  createdAt            DateTime         @default(now()) @map("created_at")
  updatedAt            DateTime         @updatedAt @map("updated_at")

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

  @@map("preferences")
}