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

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

model Company {
  id        Int      @id @default(autoincrement())
  name      String
  vatNumber String?  @unique
  email     String?
  phone     String?
  address   String?
  city      String?
  isActive  Boolean  @default(true)
  notes     String?
  externalId String?
  
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  workers   Worker[]
  sites     Site[]
  notifications Notification[]
}

model Site {
  id        Int      @id @default(autoincrement())
  name      String   // e.g. "Sede Principale", "Cantiere A"
  address   String?
  city      String?
  companyId Int
  company   Company  @relation(fields: [companyId], references: [id], onDelete: Cascade)
  
  isActive  Boolean  @default(true)

  workers   Worker[]
}

model Worker {
  id        Int      @id @default(autoincrement())
  firstName String
  lastName  String
  taxCode   String?  @unique // Codice Fiscale
  jobTitle  String?  // Mansione
  email     String?
  phone     String?
  
  companyId Int
  company   Company  @relation(fields: [companyId], references: [id])
  
  siteId    Int?
  site      Site?    @relation(fields: [siteId], references: [id])

  isActive  Boolean  @default(true)
  hiringDate DateTime?

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  events    TrainingEvent[]
}

model Course {
  id            Int      @id @default(autoincrement())
  title         String
  code          String   @default("TEMP") // Temporaneo default per migrazione, poi rimuovo o rendo unique
  description   String?
  validityYears Int      // Durata validita in anni (es. 5)
  hasPostExpiryReminder Boolean @default(false)
  isSafety      Boolean  @default(true) 
  
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt

  events        TrainingEvent[]
}

model TrainingEvent {
  id            Int      @id @default(autoincrement())
  
  workerId      Int
  worker        Worker   @relation(fields: [workerId], references: [id], onDelete: Cascade)
  
  courseId      Int
  course        Course   @relation(fields: [courseId], references: [id])
  
  eventDate     DateTime // Data del corso
  expiryDate    DateTime? // Data scadenza calcolata
  
  provider      String?  // Ente formatore
  certificateUrl String? // Link al file PDF

  status        String   @default("VALID") // VALID, EXPIRING, EXPIRED
  
  notes         String?

  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt
}

model Notification {
  id          Int      @id @default(autoincrement())
  companyId   Int
  company     Company  @relation(fields: [companyId], references: [id])
  
  type        String   // 'EXPIRING_REMINDER', 'EXPIRED_ALERT'
  status      String   @default("PENDING") // PENDING, SENT, FAILED
  
  subject     String
  content     String   // HTML content or JSON data to render
  
  sentAt      DateTime?
  scheduledFor DateTime?
  
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
}

model User {
  id        Int      @id @default(autoincrement())
  email     String   @unique
  password  String
  name      String?
  role      String   @default("ADMIN") // ADMIN, USER

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}