// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

// Looking for ways to speed up your queries, or scale easily with your serverless or edge functions?
// Try Prisma Accelerate: https://pris.ly/cli/accelerate-init

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

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

enum TransferStatus {
  ACTIVE
  EXPIRED
  DELETED
}

model User {
  id            String   @id @default(cuid())
  name          String?
  email         String?  @unique
  emailVerified DateTime?
  image         String?
  plan          String  @default("free") // "free", "rookie", or "pro"

  // Optional
  transfers     Transfer[] @relation("UserTransfers")
  accounts      Account[]
  sessions      Session[]
}

model Account {
  id                String  @id @default(cuid())
  userId            String
  type              String
  provider          String
  providerAccountId String
  refresh_token     String?
  access_token      String?
  expires_at        Int?
  token_type        String?
  scope             String?
  id_token          String?
  session_state     String?

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

  @@unique([provider, providerAccountId])
}

model Session {
  id           String   @id @default(cuid())
  sessionToken String   @unique
  userId       String
  expires      DateTime

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

model VerificationToken {
  identifier String
  token      String   @unique
  expires    DateTime

  @@unique([identifier, token])
}

model Transfer {
  id             Int      @id @default(autoincrement())
  senderEmail    String
  recipientEmail String
  passwordHash   String?
  downloadUrl    String   @unique
  createdAt      DateTime @default(now())
  expiresAt      DateTime
  files          File[]
  filenames      String? // JSON stringified array of filenames
  totalFiles Int @default(0)  // new field to track number of files in transfer
  totalSize      BigInt   @default(0) // Use BigInt to support files > 2GB
  message    String?  // optional message
  status         TransferStatus   @default(ACTIVE) // Added

  userId         String? // Change from Int? to String?
  user           User?   @relation("UserTransfers", fields: [userId], references: [id])
}


model File {
  id         Int      @id @default(autoincrement())
  name       String
  path       String
  size       BigInt   // Use BigInt to support files > 2GB
  encryptionIv String? // 12-byte IV as base64 string for AES-GCM decryption
  transferId Int
  transfer   Transfer @relation(fields: [transferId], references: [id])
  downloads  FileDownload[]   // New
}

model FileDownload {
  id        Int      @id @default(autoincrement())
  fileId    Int
  file      File     @relation(fields: [fileId], references: [id], onDelete: Cascade)
  timestamp DateTime @default(now())
  ip        String?
  userAgent String?
}