using System;
using System.Drawing;
using System.Linq;
using System.Windows.Documents;
using System.Windows.Media;
using Pastel;
using Color = System.Drawing.Color;

namespace Tetris.Models; 

public class Grid {
    private Color[,] _grid;

    public Color[,] CGrid => _grid;

    public Point MinGrid => new Point(0,0);
    public Point MaxGrid => new Point(_grid.GetLength(0)-1, _grid.GetLength(1)-1);

    public Grid(Color[,] grid) {
        _grid = grid;
    }

    public bool CanGo(Tetrominoe tetrominoe, Point point) {
        bool[,] shape = tetrominoe.Shape;
        if (point.X < MinGrid.X || point.Y < MinGrid.Y)
            return false;
        
        else if ((point.X + tetrominoe.Shape.GetLength(0)-1) > MaxGrid.X || (point.Y  + tetrominoe.Shape.GetLength(1)-1) > MaxGrid.Y)
            return false;

        for (uint x = 0; x < shape.GetLength(0); x++)
            for (uint y = 0; y < shape.GetLength(1); y++) {
                Point s = point + new Size((int) x, (int) y);
                if (shape[x, y] && _grid[s.X, s.Y] != Color.Empty)
                    return false;
            }
        
        return true;
    }
    
    public bool LineFull() {
        return Enumerable.Range(0, _grid.GetLength(0)).Select(x => _grid[x, MaxGrid.Y]).All(x => x != Color.Empty);
    }

    public void ClearLine() {
        for (int x = 0; x <= MaxGrid.X; x++)
            for (int y = MaxGrid.Y; y > 0; y--) {
                _grid[x, y] = _grid[x, y - 1];
            }
        
        for (int x = 0; x <= MaxGrid.X; x++)
            _grid[x,0] = Color.Empty;
    }

    public void PrintTetrominoe(Tetrominoe t) {
        bool[,] shape = t.Shape;
        
        for (uint x = 0; x < shape.GetLength(0); x++)
            for (uint y = 0; y < shape.GetLength(1); y++) {
                Point s = t.Coordinates + new Size((int) x, (int) y);
                if (shape[x, y])
                    _grid[s.X, s.Y] = t.Color;
            }
    }

    public override string ToString() {
        String s = "";
        for (uint y = 0; y < _grid.GetLength(1); y++) {
            for (uint x = 0; x < _grid.GetLength(0); x++) {
                s += "x".Pastel(_grid[x, y]);
            }
            s += "\n";
        }
        return s;
    }

    public string ToString(Tetrominoe t) {
        Grid g = new((Color[,]) _grid.Clone());
        g.PrintTetrominoe(t);
        return g.ToString();
    }
}