export type AlbumTag = 'Album' | 'EP' | 'Demo' | 'Deluxe' | 'Single';
export type AudioFormat = 'mp3' | 'm4a' | 'flac' | 'wav';

export interface Song {
  id: string;
  title: string;
  duration: string;
  previewUrl: string; // URL to 30-second preview
  fullUrl: string; // URL to full song (locked until purchase)
}

export interface Album {
  id: string;
  title: string;
  coverImage: string;
  year: number;
  genre: string;
  price: number;
  description: string;
  songs: Song[];
  tag: AlbumTag; // EP, Demo, Deluxe, etc.
  format: AudioFormat; // mp3, m4a, flac, wav
  bitrate: string; // e.g., "320kbps", "lossless"
}

export type PurchaseStatus = 'pending' | 'approved' | 'rejected';
export type PaymentMethod = 'ipg' | 'card-to-card';

export interface Purchase {
  id?: number;
  albumId: string;
  albumIds?: string[];
  transactionId: string;
  customerName?: string;
  email?: string;
  phoneNumber?: string;
  txReceipt?: string;
  purchaseDate: Date | number;
  approvalStatus?: PurchaseStatus; // pending, approved, rejected
  paymentMethod?: PaymentMethod; // ipg or card-to-card
  reviewedByTelegramId?: string;
  reviewedAt?: Date | number;
  telegramUserId?: string;
  telegramChatId?: string;
  receiptType?: 'text' | 'photo';
  receiptTelegramFileId?: string;
}

export interface TelegramApprover {
  userId: string;
  label?: string;
  createdAt?: Date | number;
}

export interface TelegramBotSettings {
  baseUrl: string;
  botTokenConfigured: boolean;
  greetingText: string;
  cardNumber: string;
  cardHolderName: string;
  updatedAt?: Date | number;
}

export type TelegramSessionState = 'browsing' | 'awaiting_receipt';

export interface TelegramUserSession {
  userId: string;
  chatId: string;
  state: TelegramSessionState;
  cartAlbumIds: string[];
  displayName?: string;
  updatedAt: Date | number;
}