import mongoose from 'mongoose';

const tempoSchema = new mongoose.Schema({
  inizio: String,
  bpm: String,
  metro: String,
  battito: String,
}, { _id: false });

const songSchema = new mongoose.Schema({
  id: { type: String, required: true, unique: true },
  title: { type: String, required: true },
  artist: String,
  composer: String,
  album: String,
  grouping: String,
  genre: String,
  kind: String,
  size: String,
  totalTime: String,
  discNumber: String,
  trackNumber: String,
  year: String,
  averageBpm: String,
  dateAdded: String,
  bitRate: String,
  sampleRate: String,
  comments: String,
  playCount: String,
  rating: String,
  location: String, // Original file path from Rekordbox XML
  remixer: String,
  tonality: String,
  label: String,
  mix: String,
  tempo: tempoSchema,
  // S3 file integration (preserves original location)
  s3File: {
    musicFileId: { type: mongoose.Schema.Types.ObjectId, ref: 'MusicFile' },
    s3Key: String,
    s3Url: String,
    streamingUrl: String,
    hasS3File: { type: Boolean, default: false }
  }
}, {
  timestamps: true,
  versionKey: false,
  toJSON: {
    transform: function(doc, ret) {
      ret.id = ret.id || ret._id;
      delete ret._id;
      delete ret.__v;
      return ret;
    }
  }
});

// Create indexes for performance
songSchema.index({ 's3File.hasS3File': 1 });
songSchema.index({ location: 1 });

export const Song = mongoose.model('Song', songSchema);