const mongoose = require('mongoose');

const favoriteTrackSchema = new mongoose.Schema({
  user: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    required: true,
    index: true
  },
  track: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Track',
    required: true,
    index: true
  }
}, {
  timestamps: true
});

// Составной индекс для быстрого поиска и предотвращения дублей
favoriteTrackSchema.index({ user: 1, track: 1 }, { unique: true });
favoriteTrackSchema.index({ createdAt: -1 });

module.exports = mongoose.model('FavoriteTrack', favoriteTrackSchema);