namespace Day16;

public class Panel
{
    private readonly Tile[,] _tiles;
    private readonly int _width;
    private readonly int _height;
    
    public Panel(Tile[,] tiles)
    {
        _tiles = tiles;
        _width = tiles.GetLength(0);
        _height = tiles.GetLength(1);
    }

    public int Print()
    {
        var energized = 0;
        Console.WriteLine($"{_width} x {_height}");
        for (var y = 0; y < _height; y++)
        {
            for (var x = 0; x < _width; x++)
            {
                energized += _tiles[x, y].IsEnergized ? 1 : 0;
                Console.Write(_tiles[x, y].IsEnergized ? '#' : _tiles[x, y].Value);
            }
            Console.WriteLine();
        }
        Console.WriteLine();
        return energized;
    }

    public void Energize(IRay start, int x, int y)
    {
        var tile = _tiles[x, y];
        var stack = new Stack<(IRay Ray, Tile Tile)>();
        stack.Push((start, tile));

        while (stack.Count > 0)
        {
            var item = stack.Pop();
            foreach (var r in item.Tile.Process(item.Ray))
            {
                var next = Next(r, item.Tile);
                if (next != null)
                {
                    stack.Push((r, next));
                }
            }

            Console.WriteLine($"Stack: {stack.Count}");
        }

        Console.WriteLine();
    }

    private Tile? Next(IRay ray, Tile tile)
    {
        var (x, y) = ray.Apply(tile);
        return x >= 0 && x < _width && y >= 0 && y < _height
            ? _tiles[x, y]
            : null;
    }
}