const mongoose = require('mongoose');

const albumSchema = new mongoose.Schema({
  title: {
    type: String,
    required: true,
    trim: true,
    index: true
  },
  artist: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Artist',
    required: true,
    index: true
  },
  coverImage: {
    type: String,
    default: null
  },
  year: {
    type: Number,
    default: null
  },
  genre: {
    type: String,
    default: ''
  },
  description: {
    type: String,
    default: ''
  },
  // Статистика
  stats: {
    tracks: { type: Number, default: 0 },
    duration: { type: Number, default: 0 }, // в секундах
    plays: { type: Number, default: 0 }
  },
  // Кто добавил альбом
  addedBy: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    required: true
  }
}, {
  timestamps: true
});

// Индексы для поиска
albumSchema.index({ title: 'text' });
albumSchema.index({ artist: 1, createdAt: -1 });
albumSchema.index({ createdAt: -1 });

module.exports = mongoose.model('Album', albumSchema);