using System;
using System.Drawing;
using NUnit.Framework;
using Tetris.Models;

namespace TestTetris; 

public class GridTest {
    private Color[,] ig;
    private Grid g;
    private Tetrominoe t;
    private static readonly Random random = new Random();
    
    [SetUp]
    public void SetUp() {
        ig = new Color[10, 20];
        g = new Grid(ig);
        t = new Tetrominoe(g, new bool[,] {
            {true, false, false},
            {true, true, true}
        }, new Point(5, 0), 0, Color.Aqua);
        Console.Out.WriteLine("===={Grid w/ Tetrominoe}====");
        Console.Out.WriteLine(g.ToString(t));
        Console.Out.WriteLine("============================");
    }

    [Test]
    public void CanGoLeft() {
        int startX = t.Coordinates.X;
        int startY = t.Coordinates.Y;
        Console.Out.WriteLine(t.Coordinates);
        for (int i = 1; i <= startX - g.MinGrid.X; i++) {
            t.GoLeft();
            Console.Out.WriteLine(g.ToString(t));
            Assert.AreEqual(new Point(startX-i, startY), t.Coordinates);
        }
        // Try over the left grid limit
        Assert.AreEqual(new Point(g.MinGrid.X, startY), t.Coordinates);
        t.GoLeft();
        Assert.AreEqual(new Point(g.MinGrid.X, startY), t.Coordinates);
    }
    
    [Test]
    public void CanGoRight() {
        int startX = t.Coordinates.X;
        int startY = t.Coordinates.Y;
        Console.Out.WriteLine(t.Coordinates);
        for (int i = 1; i < (g.MaxGrid.X+1)-startX-t.Shape.GetLength(0)+1; i++) {
            t.GoRight();
            Console.Out.WriteLine(g.ToString(t));
            Assert.AreEqual(new Point(startX+i, startY), t.Coordinates);
        }
        // Try over the right grid limit
        Assert.AreEqual(new Point((g.MaxGrid.X+1)-t.Shape.GetLength(0), startY), t.Coordinates);
        t.GoRight();
        Assert.AreEqual(new Point((g.MaxGrid.X+1)-t.Shape.GetLength(0), startY), t.Coordinates);
    }

    [Test]
    public void CanGoDown() {
        int startX = t.Coordinates.X;
        int startY = t.Coordinates.Y;
        for (int i = 1; i < (g.MaxGrid.Y+1)-t.Shape.GetLength(1)+1; i++) {
            t.GoDown();
            Console.Out.WriteLine(g.ToString(t));
            Assert.AreEqual(new Point(startX, startY+i), t.Coordinates);
        }
        // Try over the grid depth limit
        Assert.AreEqual(new Point(startX, (g.MaxGrid.Y+1)-t.Shape.GetLength(1)), t.Coordinates);
        t.GoDown();
        Assert.AreEqual(new Point(startX, (g.MaxGrid.Y+1)-t.Shape.GetLength(1)), t.Coordinates);
    }

    [Test]
    public void CanRotate() {
        bool[,] shape = new bool[,] {
            {true, false, false},
            {true, true, true}
        };
        int longestShapeBorder;
        if (shape.GetLength(0) > shape.GetLength(1))
            longestShapeBorder = shape.GetLength(0);
        else
            longestShapeBorder = shape.GetLength(1);
        
        g = new Grid(new Color[longestShapeBorder, longestShapeBorder]);
        t = new Tetrominoe(g, shape, new Point(0, 0), 0, Color.Aqua);
        Console.Out.WriteLine(g.ToString(t));
        
        t.RotateLeft();
        Console.Out.WriteLine(g.ToString(t));
        Assert.AreEqual(3, t.Orientation);
        t.RotateLeft();
        Console.Out.WriteLine(g.ToString(t));
        Assert.AreEqual(2, t.Orientation);
        t.RotateLeft();
        Console.Out.WriteLine(g.ToString(t));
        Assert.AreEqual(1, t.Orientation);
        t.RotateLeft();
        Console.Out.WriteLine(g.ToString(t));
        Assert.AreEqual(0, t.Orientation);
    }

    [Test]
    public void CantGo() {
        ig[4, 0] = Color.Red;
        ig[4, 1] = Color.Red;
        ig[4, 2] = Color.Red;
        ig[4, 3] = Color.Red;
        ig[5, 3] = Color.Red;
        ig[6, 3] = Color.Red;
        ig[7, 3] = Color.Red;
        ig[7, 2] = Color.Red;
        ig[7, 1] = Color.Red;
        ig[7, 0] = Color.Red;
        
        Console.Out.WriteLine(g.ToString(t));
        int startX = t.Coordinates.X;
        int startY = t.Coordinates.Y;
        int startOrientation = t.Orientation;
        t.GoDown();
        Assert.AreEqual(new Point(startX, startY), t.Coordinates);
        t.GoLeft();
        Assert.AreEqual(new Point(startX, startY), t.Coordinates);
        t.GoRight();
        Assert.AreEqual(new Point(startX, startY), t.Coordinates);
        t.RotateLeft();
        Assert.AreEqual(startOrientation, t.Orientation);
        t.RotateRight();
        Assert.AreEqual(startOrientation, t.Orientation);
    }

    [Test]
    public void LineFull() {
        Console.Out.WriteLine(g.ToString());
        Assert.AreEqual(-1, g.LineFull());
        
        int line = random.Next(g.MinGrid.Y, g.MaxGrid.Y);
        
        for (int x = 0; x < ig.GetLength(0); x++)
            ig[x, line] = Color.Aqua;
        
        Console.Out.WriteLine("==========");
        Console.Out.WriteLine(g.ToString());
        Assert.AreEqual(line, g.LineFull());
    }

    [Test]
    public void ClearLine() {
        for (uint x = 0; x < ig.GetLength(0); x++)
            for (uint y = 0; y < ig.GetLength(1); y++) {
                ig[x, y] = Color.FromArgb(random.Next(256), random.Next(256), random.Next(256));
            }

        int line = random.Next(g.MinGrid.Y, g.MaxGrid.Y);
        for (int x = 0; x < ig.GetLength(0); x++)
            ig[x, line] = Color.Aqua;
        
        Color[,] olg_grid = (Color[,])ig.Clone();
        Console.Out.WriteLine(g.ToString());
        g.ClearLine(line);
        Console.Out.WriteLine("==========");
        Console.Out.WriteLine(g.ToString());
        for (uint x = 0; x < ig.GetLength(0); x++)
            for (uint y = 1; y <= line; y++) {
                Assert.AreEqual(olg_grid[x, y-1], ig[x,y]); 
            }
        
        for (uint x = 0; x < ig.GetLength(0); x++)
            Assert.AreEqual(Color.Empty, ig[x, 0]);
    }
}