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

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

enum Platform {
  VK
  TELEGRAM
  YOUTUBE
}

enum GiveawayStatus {
  DRAFT
  FETCHING
  READY
  SNAPSHOT_LOCKED
  DRAWN
  PUBLISHED
  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[]
  snapshots           ParticipantSnapshot[]
  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 ParticipantSnapshot {
  id                       String       @id @default(cuid())
  giveawayId               String
  giveaway                 Giveaway     @relation(fields: [giveawayId], references: [id], onDelete: Cascade)
  version                  Int          @default(1)
  createdAt                DateTime     @default(now())
  eligibleParticipants     Json         // Canonical JSON array of FilteredParticipant
  filterRulesSnapshot      Json         // Canonical JSON snapshot of FilterRules
  participantCount         Int
  participantsSnapshotHash String
  conditionsHash           String

  drawResult               DrawResult?
  auditRecord              AuditRecord?

  @@unique([giveawayId, version])
  @@index([giveawayId])
}

model DrawResult {
  id                     String              @id @default(cuid())
  drawId                 String              // Original domain drawId (e.g. draw_8f9102ab...)
  giveawayId             String              @unique
  giveaway               Giveaway            @relation(fields: [giveawayId], references: [id], onDelete: Cascade)
  snapshotId             String              @unique
  snapshot               ParticipantSnapshot @relation(fields: [snapshotId], references: [id], onDelete: Restrict)
  winners                Json                // Array of Winner entities
  reserveWinners         Json                // Array of Winner entities
  winnerIds              Json                // string[]
  reserveWinnerIds       Json                // string[]
  totalEligibleCount     Int
  totalLoadedCount       Int
  seedUsed               String
  algorithmVersion       String              @default("HMAC_SHA256_FY_V1")
  deterministicProofHash String
  auditEventHash         String
  drawnAt                DateTime            @default(now())
}

model AuditRecord {
  id                     String              @id @default(cuid())
  giveawayId             String              @unique
  giveaway               Giveaway            @relation(fields: [giveawayId], references: [id], onDelete: Cascade)
  snapshotId             String              @unique
  snapshot               ParticipantSnapshot @relation(fields: [snapshotId], references: [id], onDelete: Restrict)
  algorithmVersion       String              @default("HMAC_SHA256_FY_V1")
  seed                   String
  participantsSnapshotHash String
  conditionsHash         String
  deterministicProofHash String
  auditEventHash         String
  winnerIds              Json                // string[]
  reserveWinnerIds       Json                // string[]
  eligibleCount          Int
  drawId                 String
  drawnAt                DateTime            @default(now())
  verifiedAt             DateTime            @default(now())
}