import 'package:flutter/material.dart';
import 'package:wolf_dart/classes/color_palette.dart';
import 'package:wolf_dart/classes/matrix.dart';

class SpriteGallery extends StatelessWidget {
  final List<Matrix<int>> sprites;

  const SpriteGallery({super.key, required this.sprites});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("VSWAP Sprite Gallery")),
      backgroundColor: Colors.black,
      body: GridView.builder(
        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: 8, // 8 sprites per row
        ),
        itemCount: sprites.length,
        itemBuilder: (context, index) {
          return Column(
            children: [
              Text(
                "Idx: $index",
                style: const TextStyle(color: Colors.white, fontSize: 10),
              ),
              Expanded(
                child: CustomPaint(
                  painter: SingleSpritePainter(sprite: sprites[index]),
                  size: const Size(64, 64),
                ),
              ),
            ],
          );
        },
      ),
    );
  }
}

class SingleSpritePainter extends CustomPainter {
  final Matrix<int> sprite;
  SingleSpritePainter({required this.sprite});

  @override
  void paint(Canvas canvas, Size size) {
    double pixelSize = size.width / 64;
    for (int x = 0; x < 64; x++) {
      for (int y = 0; y < 64; y++) {
        int colorByte = sprite[x][y];
        if (colorByte != 255) {
          // Skip transparency
          canvas.drawRect(
            Rect.fromLTWH(x * pixelSize, y * pixelSize, pixelSize, pixelSize),
            Paint()..color = ColorPalette.vga[colorByte],
          );
        }
      }
    }
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) => false;
}