import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Perspective Issues',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  double _yScale = 1.0;
  double _perspective = 0.000;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Perspective Issues')),
      body: Stack(
        alignment: Alignment.bottomCenter,
        children: [
          Transform(
            transform: Matrix4.identity()
              ..setEntry(3, 1, _perspective)
              ..scale(1.0, _yScale, 1.0),
            alignment: Alignment.center,

            child: ListView.builder(
              reverse: true,
              itemBuilder: (context, index) {
                final hue = (index * 137.5) % 360;
                final color = HSLColor.fromAHSL(1.0, hue, 0.6, 0.5).toColor();
                return Container(
                  height: 100.0,
                  color: color,
                  child: Center(
                    child: Text(
                      'Index: $index',
                      style: const TextStyle(color: Colors.white, fontSize: 20, fontWeight: FontWeight.bold),
                    ),
                  ),
                );
              },
            ),
          ),
          _buildDebugControls(),
        ],
      ),
    );
  }

  Widget _buildDebugControls() {
    return Card(
      child: Padding(
        padding: const EdgeInsets.symmetric(vertical: 12.0),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            _buildSlider(
              label: 'Perspective',
              value: _perspective,
              max: 0,
              min: -0.005,
              defaultValue: 0.000,
              onChanged: (value) => setState(() => _perspective = value),
            ),
            _buildSlider(
              label: 'Y Scale',
              value: _yScale,
              min: 1.0,
              max: 5.0,
              defaultValue: 1.0,
              onChanged: (value) => setState(() => _yScale = value),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildSlider({
    required String label,
    required double value,
    required double min,
    required double max,
    required double defaultValue,
    required ValueChanged<double> onChanged,
  }) {
    return Column(
      children: [
        Text('$label: ${value.toStringAsFixed(4)}'),
        Row(
          children: [
            Expanded(
              child: Slider(
                value: value,
                min: min,
                max: max,
                label: value.toStringAsFixed(4),
                onChanged: onChanged,
              ),
            ),
            const SizedBox(width: 8.0),
            IconButton(icon: const Icon(Icons.refresh, size: 20), onPressed: () => onChanged(defaultValue)),
          ],
        ),
      ],
    );
  }
}