import 'dart:typed_data';

import 'package:flutter_test/flutter_test.dart';
import 'package:korken_mosaic/project_codec.dart';

void main() {
  test('MosaicProjectData json roundtrip keeps values including catalog snapshot', () {
    final original = MosaicProjectData(
      useCapSize: true,
      gridWidth: '50',
      gridHeight: '40',
      capSize: '10',
      fidelityStructure: 0.3,
      ditheringStrength: 0.2,
      edgeEmphasis: 0.4,
      colorVariation: 0.5,
      selectedPreset: 'realistisch',
      sourceImageBytes: Uint8List.fromList([1, 2, 3]),
      catalogSnapshot: const [
        MosaicPaletteSnapshotEntry(name: 'White', colorValue: 0xFFF2F2F2),
        MosaicPaletteSnapshotEntry(name: 'Blue', colorValue: 0xFF3F6FD8),
      ],
      savedAt: DateTime.parse('2026-01-01T12:00:00Z'),
    );

    final decoded = MosaicProjectData.fromJson(original.toJson());

    expect(decoded.useCapSize, isTrue);
    expect(decoded.gridWidth, '50');
    expect(decoded.gridHeight, '40');
    expect(decoded.capSize, '10');
    expect(decoded.selectedPreset, 'realistisch');
    expect(decoded.sourceImageBytes, isNotNull);
    expect(decoded.sourceImageBytes!, [1, 2, 3]);
    expect(decoded.catalogSnapshot.length, 2);
    expect(decoded.catalogSnapshot.first.name, 'White');
    expect(decoded.catalogSnapshot.last.colorValue, 0xFF3F6FD8);
  });

  test('MosaicProjectData defaults to empty snapshot when old project has none', () {
    final decoded = MosaicProjectData.fromJson({
      'useCapSize': false,
      'gridWidth': '40',
      'gridHeight': '30',
      'capSize': '12',
      'selectedPreset': 'ausgewogen',
      'savedAt': '2026-01-01T12:00:00Z',
    });

    expect(decoded.catalogSnapshot, isEmpty);
    expect(decoded.sourceImageBytes, isNull);
  });
}