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

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

enum Platform {
  VK
  TELEGRAM
  YOUTUBE
}

enum GiveawayStatus {
  DRAFT
  FETCHING
  READY
  COMPLETED
  CANCELLED
}

enum ParticipantSource {
  LIKES
  COMMENTS
  REPOSTS
  COMBINED
}

model Giveaway {
  id                  String         @id @default(cuid())
  platform            Platform       @default(VK)
  sourceUrl           String
  platformOwnerId     String
  platformPostId      String
  title               String
  description         String?
  postImageUrl        String?
  postLikesCount      Int            @default(0)
  postCommentsCount   Int            @default(0)
  postRepostsCount    Int            @default(0)
  status              GiveawayStatus @default(DRAFT)
  filterRules         Json           // FilterRules object
  winnersCount        Int            @default(1)
  reserveWinnersCount Int            @default(0)
  seed                String?
  createdAt           DateTime       @default(now())
  updatedAt           DateTime       @updatedAt
  drawnAt             DateTime?

  participants        Participant[]
  drawResult          DrawResult?
  auditRecord         AuditRecord?

  @@index([platform, platformOwnerId, platformPostId])
}

model Participant {
  id              String            @id @default(cuid())
  giveawayId      String
  giveaway        Giveaway          @relation(fields: [giveawayId], references: [id], onDelete: Cascade)
  platformUserId  String
  firstName       String
  lastName        String
  username        String?
  avatarUrl       String?
  source          ParticipantSource @default(LIKES)
  liked           Boolean           @default(false)
  commented       Boolean           @default(false)
  commentsCount   Int               @default(0)
  reposted        Boolean           @default(false)
  subscribed      Boolean           @default(false)
  eligible        Boolean           @default(true)
  exclusionReason String?
  createdAt       DateTime          @default(now())

  @@unique([giveawayId, platformUserId])
  @@index([giveawayId, eligible])
}

model DrawResult {
  id                 String   @id @default(cuid())
  giveawayId         String   @unique
  giveaway           Giveaway @relation(fields: [giveawayId], references: [id], onDelete: Cascade)
  winners            Json     // Array of Winner entities
  reserveWinners     Json     // Array of Winner entities
  totalEligibleCount Int
  totalLoadedCount   Int
  seedUsed           String
  algorithm          String   @default("HMAC-SHA256-FISHER-YATES")
  drawnAt            DateTime @default(now())
}

model AuditRecord {
  id                       String   @id @default(cuid())
  giveawayId               String   @unique
  giveaway                 Giveaway @relation(fields: [giveawayId], references: [id], onDelete: Cascade)
  participantsSnapshotHash String
  seed                     String
  algorithm                String   @default("HMAC-SHA256-FISHER-YATES")
  filterRulesSnapshot      Json
  winnersSnapshot          Json
  verifiedAt               DateTime @default(now())
  verificationSignature    String
}