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

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

model User {
  id        String   @id @default(uuid())
  email     String   @unique
  name      String?
  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")

  favorites   UserFavorite[]
  history     PlayHistory[]
  settings    UserSettings?
  trackLikes  TrackLike[]

  @@map("users")
}

model MagicLinkToken {
  id        String    @id @default(uuid())
  email     String
  token     String    @unique
  expiresAt DateTime  @map("expires_at")
  usedAt    DateTime? @map("used_at")
  createdAt DateTime  @default(now()) @map("created_at")

  @@index([token])
  @@index([email])
  @@map("magic_link_tokens")
}

model Station {
  id               String    @id @default(cuid())
  stationId        Int       @unique @map("station_id")
  name             String
  prefix           String
  streamUrl        String    @map("stream_url")
  coverUrl         String?   @map("cover_url")
  genre            String?
  tags             String[]
  sortOrder        Int       @map("sort_order")
  source           String    @default("local") // "record" | "local"
  isOnline         Boolean   @default(true) @map("is_online")
  lastCheckAt      DateTime? @map("last_check_at")
  recordStationId  Int?      @unique @map("record_station_id")
  createdAt        DateTime  @default(now()) @map("created_at")
  updatedAt        DateTime  @updatedAt @map("updated_at")

  favorites   UserFavorite[]
  history     PlayHistory[]
  nowPlaying  NowPlaying?
  trackPlays  TrackPlay[]

  @@index([isOnline])
  @@index([source])
  @@index([recordStationId])
  @@map("stations")
}

model NowPlaying {
  id        String   @id @default(cuid())
  stationId String   @unique @map("station_id")
  station   Station  @relation(fields: [stationId], references: [id], onDelete: Cascade)
  song      String
  artist    String
  coverUrl  String?  @map("cover_url")
  updatedAt DateTime @updatedAt @map("updated_at")

  @@map("now_playing")
}

model UserFavorite {
  id        String   @id @default(cuid())
  userId    String   @map("user_id")
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  stationId String   @map("station_id")
  station   Station  @relation(fields: [stationId], references: [id], onDelete: Cascade)
  createdAt DateTime @default(now()) @map("created_at")

  @@unique([userId, stationId])
  @@index([userId])
  @@map("user_favorites")
}

model PlayHistory {
  id        String   @id @default(cuid())
  userId    String   @map("user_id")
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  stationId String   @map("station_id")
  station   Station  @relation(fields: [stationId], references: [id], onDelete: Cascade)
  playedAt  DateTime @default(now()) @map("played_at")

  @@index([userId, playedAt])
  @@map("play_history")
}

model UserSettings {
  id                  String   @id @default(cuid())
  userId              String   @unique @map("user_id")
  user                User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  theme               String   @default("system")
  language            String   @default("ru")
  autoPlay            Boolean  @default(false) @map("auto_play")
  showOffline         Boolean  @default(true) @map("show_offline")
  sleepTimerMinutes   Int?     @map("sleep_timer_minutes")
  createdAt           DateTime @default(now()) @map("created_at")
  updatedAt           DateTime @updatedAt @map("updated_at")

  @@map("user_settings")
}

// Уникальный трек (нормализованный ключ artist+song)
model Track {
  id          String    @id @default(cuid())
  normKey     String    @unique @map("norm_key")
  artist      String
  song        String
  coverUrl    String?   @map("cover_url")
  album       String?
  releaseDate DateTime? @map("release_date")
  // Обогащение через Discogs (своя БД — в рантайме к Discogs не ходим)
  genre        String?
  styles       String[] @default([])
  label        String?
  year         Int?
  discogsId    Int?     @map("discogs_id")
  // Состояние обогащения: pending | done | failed
  enrichStatus String   @default("pending") @map("enrich_status")
  firstSeenAt DateTime  @default(now()) @map("first_seen_at")
  enrichedAt  DateTime? @map("enriched_at")

  plays TrackPlay[]
  likes TrackLike[]

  @@index([genre])
  // Частичный индекс под бэкфилл обогащения создаётся миграцией (Prisma не умеет
  // partial WHERE): tracks_enrich_pending_idx (first_seen_at DESC) WHERE enrich_status='pending'.
  @@map("tracks")
}

// Факт проигрывания трека на станции
model TrackPlay {
  id        String   @id @default(cuid())
  trackId   String   @map("track_id")
  track     Track    @relation(fields: [trackId], references: [id], onDelete: Cascade)
  stationId String   @map("station_id")
  station   Station  @relation(fields: [stationId], references: [id], onDelete: Cascade)
  playedAt  DateTime @default(now()) @map("played_at")

  @@index([trackId, playedAt])
  @@index([playedAt])
  @@index([stationId])
  // Покрывающий индекс под агрегацию чартов (WHERE played_at>=X → GROUP BY track_id, COUNT DISTINCT station_id)
  @@index([playedAt, trackId, stationId], map: "track_plays_window_idx")
  @@map("track_plays")
}

// Лайк трека пользователем
model TrackLike {
  id        String   @id @default(cuid())
  trackId   String   @map("track_id")
  track     Track    @relation(fields: [trackId], references: [id], onDelete: Cascade)
  userId    String   @map("user_id")
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  createdAt DateTime @default(now()) @map("created_at")

  @@unique([trackId, userId])
  @@index([trackId])
  @@map("track_likes")
}