import 'dart:convert';
import 'dart:typed_data';

class MosaicProjectData {
  final bool useCapSize;
  final String gridWidth;
  final String gridHeight;
  final String capSize;
  final double fidelityStructure;
  final double ditheringStrength;
  final double edgeEmphasis;
  final double colorVariation;
  final String selectedPreset;
  final Uint8List? sourceImageBytes;
  final DateTime savedAt;

  const MosaicProjectData({
    required this.useCapSize,
    required this.gridWidth,
    required this.gridHeight,
    required this.capSize,
    required this.fidelityStructure,
    required this.ditheringStrength,
    required this.edgeEmphasis,
    required this.colorVariation,
    required this.selectedPreset,
    required this.sourceImageBytes,
    required this.savedAt,
  });

  Map<String, dynamic> toJson() => {
        'useCapSize': useCapSize,
        'gridWidth': gridWidth,
        'gridHeight': gridHeight,
        'capSize': capSize,
        'fidelityStructure': fidelityStructure,
        'ditheringStrength': ditheringStrength,
        'edgeEmphasis': edgeEmphasis,
        'colorVariation': colorVariation,
        'selectedPreset': selectedPreset,
        'sourceImageBase64':
            sourceImageBytes == null ? null : base64Encode(sourceImageBytes!),
        'savedAt': savedAt.toIso8601String(),
      };

  factory MosaicProjectData.fromJson(Map<String, dynamic> json) {
    final sourceB64 = json['sourceImageBase64'] as String?;
    return MosaicProjectData(
      useCapSize: json['useCapSize'] as bool? ?? false,
      gridWidth: json['gridWidth'] as String? ?? '40',
      gridHeight: json['gridHeight'] as String? ?? '30',
      capSize: json['capSize'] as String? ?? '12',
      fidelityStructure: (json['fidelityStructure'] as num?)?.toDouble() ?? 0.5,
      ditheringStrength: (json['ditheringStrength'] as num?)?.toDouble() ?? 0.35,
      edgeEmphasis: (json['edgeEmphasis'] as num?)?.toDouble() ?? 0.4,
      colorVariation: (json['colorVariation'] as num?)?.toDouble() ?? 0.3,
      selectedPreset: json['selectedPreset'] as String? ?? 'ausgewogen',
      sourceImageBytes: sourceB64 == null ? null : base64Decode(sourceB64),
      savedAt: DateTime.tryParse(json['savedAt'] as String? ?? '') ?? DateTime.now(),
    );
  }
}