// lib/metadata/metadata_reader.dart
import 'dart:io';
import 'package:audio_metadata_reader/audio_metadata_reader.dart' as amr;
import 'metadata_model.dart';

class MetadataReader {
  Future<RawMetadata> readRawMetadata(File file) async {
    try {
      final meta = amr.readMetadata(file, getImage: false);

      return RawMetadata(
        title: meta.title ?? '',
        artist: meta.artist ?? '',
        album: meta.album ?? '',
        // ⭐ genres 和 performers 是非空 List<String>，直接使用
        genres: meta.genres,
        performers: meta.performers,
        year: _toInt(meta.year),
        trackNumber: _toInt(meta.trackNumber),
        trackTotal: _toInt(meta.trackTotal),
        discNumber: _toInt(meta.discNumber),
        totalDisc: _toInt(meta.totalDisc),
        duration: meta.duration,
      );
    } catch (e) {
      return const RawMetadata();
    }
  }

  /// 安全转换为 int，处理 Object 类型
  int _toInt(dynamic value) {
    if (value == null) return 0;
    if (value is int) return value;
    if (value is String) return int.tryParse(value) ?? 0;
    // 有些字段可能是 double 或 num
    if (value is num) return value.toInt();
    return 0;
  }
}