import 'dart:io';
import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:lottie/lottie.dart';
import 'utils.dart';

void main() {
  void testGolden(
    String description,
    ValueDelegate delegate, {
    double? progress,
    String? filePath,
  }) {
    filePath ??= 'Tests/Shapes.json';

    var screenshotName = description
        .toLowerCase()
        .replaceAll(RegExp('[^a-z0-9 ]'), '')
        .replaceAll(' ', '_');

    testWidgets(description, (tester) async {
      var composition = await LottieComposition.fromBytes(
        File('example/assets/$filePath').readAsBytesSync(),
      );

      var animation = AnimationController(
        vsync: tester,
        duration: composition.duration,
      );
      if (progress != null) {
        animation.value = progress;
      }

      await tester.pumpWidget(
        Lottie(
          composition: composition,
          controller: animation,
          delegates: LottieDelegates(values: [delegate]),
          addRepaintBoundary: false,
        ),
      );
      await tester.pump();
      await expectLater(
        find.byType(Lottie),
        matchesGoldenFile('goldens/dynamic/$screenshotName.png'),
      );

      if (progress == null || progress == 0) {
        await tester.pumpWidget(
          Lottie(
            composition: composition,
            controller: animation,
            delegates: const LottieDelegates(values: []),
            addRepaintBoundary: false,
          ),
        );
        await tester.pump();
      }
    });
  }

  testGolden(
    'Fill color (Green)',
    ValueDelegate.color([
      'Shape Layer 1',
      'Rectangle',
      'Fill 1',
    ], value: Colors.green),
  );

  testGolden(
    'Fill color (Yellow)',
    ValueDelegate.color([
      'Shape Layer 1',
      'Rectangle',
      'Fill 1',
    ], value: Colors.yellow),
  );

  testGolden(
    'Fill opacity',
    ValueDelegate.opacity(['Shape Layer 1', 'Rectangle', 'Fill 1'], value: 50),
  );

  testGolden(
    'Stroke color',
    ValueDelegate.strokeColor([
      'Shape Layer 1',
      'Rectangle',
      'Stroke 1',
    ], value: Colors.green),
  );

  testGolden(
    'Stroke width',
    ValueDelegate.strokeWidth([
      'Shape Layer 1',
      'Rectangle',
      'Stroke 1',
    ], value: 50),
  );

  testGolden(
    'Stroke opacity',
    ValueDelegate.opacity([
      'Shape Layer 1',
      'Rectangle',
      'Stroke 1',
    ], value: 50),
  );

  testGolden(
    'Transform anchor point',
    ValueDelegate.transformAnchorPoint([
      'Shape Layer 1',
      'Rectangle',
    ], value: const Offset(20, 20)),
  );

  testGolden(
    'Transform position',
    ValueDelegate.transformPosition([
      'Shape Layer 1',
      'Rectangle',
    ], value: const Offset(20, 20)),
  );

  testGolden(
    'Transform position (relative)',
    ValueDelegate.transformPosition([
      'Shape Layer 1',
      'Rectangle',
    ], relative: const Offset(20, 20)),
  );

  testGolden(
    'Transform opacity',
    ValueDelegate.transformOpacity(['Shape Layer 1', 'Rectangle'], value: 50),
  );

  testGolden(
    'Transform rotation',
    ValueDelegate.transformRotation(['Shape Layer 1', 'Rectangle'], value: 45),
  );

  testGolden(
    'Transform scale',
    ValueDelegate.transformScale([
      'Shape Layer 1',
      'Rectangle',
    ], value: const Offset(0.5, 0.5)),
  );

  testGolden(
    'Rectangle corner roundedness',
    ValueDelegate.cornerRadius([
      'Shape Layer 1',
      'Rectangle',
      'Rectangle Path 1',
    ], value: 7),
  );

  testGolden(
    'Rectangle position',
    ValueDelegate.position([
      'Shape Layer 1',
      'Rectangle',
      'Rectangle Path 1',
    ], relative: const Offset(20, 20)),
  );

  testGolden(
    'Rectangle size',
    ValueDelegate.rectangleSize([
      'Shape Layer 1',
      'Rectangle',
      'Rectangle Path 1',
    ], relative: const Offset(30, 40)),
  );

  testGolden(
    'Ellipse position',
    ValueDelegate.position([
      'Shape Layer 1',
      'Ellipse',
      'Ellipse Path 1',
    ], relative: const Offset(20, 20)),
  );

  testGolden(
    'Ellipse size',
    ValueDelegate.ellipseSize([
      'Shape Layer 1',
      'Ellipse',
      'Ellipse Path 1',
    ], relative: const Offset(40, 60)),
  );

  testGolden(
    'Star points',
    ValueDelegate.polystarPoints([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], value: 8),
  );

  testGolden(
    'Star rotation',
    ValueDelegate.polystarRotation([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], value: 10),
  );

  testGolden(
    'Star position',
    ValueDelegate.position([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], relative: const Offset(20, 20)),
  );

  testGolden(
    'Star inner radius',
    ValueDelegate.polystarInnerRadius([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], value: 10),
  );

  testGolden(
    'Star inner roundedness',
    ValueDelegate.polystarInnerRoundedness([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], value: 100),
  );

  testGolden(
    'Star outer radius',
    ValueDelegate.polystarOuterRadius([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], value: 60),
  );

  testGolden(
    'Star outer roundedness',
    ValueDelegate.polystarOuterRoundedness([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], value: 100),
  );

  testGolden(
    'Polygon points',
    ValueDelegate.polystarPoints([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], value: 8),
  );

  testGolden(
    'Polygon rotation',
    ValueDelegate.polystarRotation([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], value: 10),
  );

  testGolden(
    'Polygon position',
    ValueDelegate.position([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], relative: const Offset(20, 20)),
  );

  testGolden(
    'Polygon radius',
    ValueDelegate.polystarOuterRadius([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], relative: 60),
  );

  testGolden(
    'Polygon roundedness',
    ValueDelegate.polystarOuterRoundedness([
      'Shape Layer 1',
      'Star',
      'Polystar Path 1',
    ], value: 100),
  );

  testGolden(
    'Repeater transform position',
    ValueDelegate.transformPosition([
      'Shape Layer 1',
      'Repeater Shape',
      'Repeater 1',
    ], relative: const Offset(100, 100)),
  );

  testGolden(
    'Repeater transform start opacity',
    ValueDelegate.transformStartOpacity([
      'Shape Layer 1',
      'Repeater Shape',
      'Repeater 1',
    ], value: 25),
  );

  testGolden(
    'Repeater transform end opacity',
    ValueDelegate.transformEndOpacity([
      'Shape Layer 1',
      'Repeater Shape',
      'Repeater 1',
    ], value: 25),
  );

  testGolden(
    'Repeater transform rotation',
    ValueDelegate.transformRotation([
      'Shape Layer 1',
      'Repeater Shape',
      'Repeater 1',
    ], value: 45),
  );

  testGolden(
    'Repeater transform scale',
    ValueDelegate.transformScale([
      'Shape Layer 1',
      'Repeater Shape',
      'Repeater 1',
    ], value: const Offset(2, 2)),
  );

  testGolden(
    'Time remapping',
    ValueDelegate.timeRemap(['Circle 1'], value: 1),
    progress: 0.1,
  );

  testGolden(
    'Color Filter',
    ValueDelegate.colorFilter([
      '**',
    ], value: const ColorFilter.mode(Colors.green, BlendMode.srcATop)),
  );

  testGolden('Null Color Filter', ValueDelegate.colorFilter(['**']));

  testGolden(
    'Matte property',
    ValueDelegate.rectangleSize([
      'Shape Layer 1',
      'Rectangle 1',
      'Rectangle Path 1',
    ], value: const Offset(50, 50)),
    filePath: 'Tests/TrackMattes.json',
  );

  testGolden('Blur', ValueDelegate.blurRadius(['**'], value: 10));

  testGolden(
    'Drop shadow',
    ValueDelegate.dropShadow(
      ['Shape Layer 1', '**'],
      value: const DropShadow(
        color: Colors.green,
        direction: 150,
        distance: 20,
        radius: 10,
      ),
    ),
  );

  testGolden(
    'Solid Color',
    ValueDelegate.color(['Cyan Solid 1', '**'], value: Colors.yellow),
    filePath: 'Tests/SolidLayerTransform.json',
  );

  for (var progress in [0.0, 0.5, 1.0]) {
    testGolden(
      'Opacity interpolation ($progress)',
      ValueDelegate.transformOpacity(
        ['Shape Layer 1', 'Rectangle'],
        callback: (frameInfo) => lerpDouble(
          10,
          100,
          Curves.linear.transform(frameInfo.overallProgress),
        )!.round(),
      ),
      progress: progress,
    );
  }

  testWidgets('warningShimmer', (tester) async {
    var size = const Size(500, 400);
    tester.view.physicalSize = size;
    tester.view.devicePixelRatio = 1.0;

    var composition = await LottieComposition.fromBytes(
      File('test/data/warningShimmer.json').readAsBytesSync(),
    );

    var delegates = <String, List<ValueDelegate>>{
      '1': [
        for (var i in ['1', '2', '5'])
          ValueDelegate.color(['Layer $i Outlines', '**'], value: Colors.red),
        for (var i in ['3', '4'])
          ValueDelegate.color([
            'Layer $i Outlines',
            '**',
          ], value: Colors.greenAccent),
      ],
      '2': [
        for (var i in ['1', '2', '5'])
          ValueDelegate.color([
            'Layer $i Outlines',
            'Group 1',
            '*',
          ], value: Colors.red),
        for (var i in ['3', '4'])
          ValueDelegate.color([
            'Layer $i Outlines',
            'Group 1',
            '*',
          ], value: Colors.greenAccent),
      ],
      '3': [
        for (var i in ['1', '2', '5'])
          ValueDelegate.color([
            'Layer $i Outlines',
            'Group 1',
            'Fill 1',
          ], value: Colors.red),
        for (var i in ['3', '4'])
          ValueDelegate.color([
            'Layer $i Outlines',
            'Group 1',
            'Fill 1',
          ], value: Colors.greenAccent),
      ],
    };

    for (var variant in delegates.entries) {
      await tester.pumpWidget(
        FilmStrip(
          composition,
          size: size,
          delegates: LottieDelegates(values: variant.value),
        ),
      );

      await expectLater(
        find.byType(FilmStrip),
        matchesGoldenFile('goldens/warningShimmer_${variant.key}.png'),
      );
    }
  });
}