using System;
using System.Windows.Forms;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Text;

namespace KnightsTour2
{
    
    public partial class KnightsTour : Form
    {
        public Button[,] buttons = new Button[8, 8];
        public Point lastMove;
        private Bitmap knight = new Bitmap(typeof(KnightsTour), "knight.png");
        private Bitmap knightblack = new Bitmap(typeof(KnightsTour), "knightblack.png");
        bool firstMove = true;
        double counter = 0.0;
        public KnightsTour()
        {
            InitializeComponent();
            //Button[,] buttons = new Button[8,8];
            for (int i = 0; i < 8; i++)
                for (int j = 0; j < 8; j++)
                {
                    // create each of the buttons
                    buttons[i, j] = new Button();
                    // initialize each button here
                    buttons[i, j].Name = "b" + (i * 100 + j).ToString();
                    buttons[i, j].Width = 50;
                    buttons[i, j].Height = 50;
                    buttons[i, j].Location = new Point(i * 50, j * 50);
                    // set up size, location, color, etc...
                    // add the click event handler
                    buttons[i, j].Click += new EventHandler(ButtonClick);
                    if ((i + j) % 2 == 0)
                        buttons[i, j].BackColor = Color.Black;
                    else
                        buttons[i, j].BackColor = Color.White;
                        // add the button controls to the form
                    this.Controls.Add(buttons[i, j]);
                }
        }
        private void ButtonClick(object sender, EventArgs e)
        {
            double increment = Convert.ToDouble(((double)100.0/64.0).ToString("0.00"));
            for(int i = 0; i < 8; i++)
                for (int j = 0; j < 8; j++)
                {
                    if (buttons[i, j].BackColor == Color.Red)
                    {
                        if ((i + j) % 2 == 0)
                            buttons[i, j].BackColor = Color.Black;
                        else
                            buttons[i, j].BackColor = Color.White;
                    }
                }
            // determine which button was clicked B
            Button b = (Button) sender; 
            int x = Convert.ToInt32(b.Name.TrimStart('b'))/100; 
            int y = Convert.ToInt32(b.Name.TrimStart('b'))%100;
            if (firstMove == false)
            {
                if (x + 2 == lastMove.X && y + 1 == lastMove.Y || x + 2 == lastMove.X && y - 1 == lastMove.Y ||
                    x + 1 == lastMove.X && y + 2 == lastMove.Y || x + 1 == lastMove.X && y - 2 == lastMove.Y ||
                    x - 2 == lastMove.X && y + 1 == lastMove.Y || x - 2 == lastMove.X && y - 1 == lastMove.Y ||
                    x - 1 == lastMove.X && y + 2 == lastMove.Y || x - 1 == lastMove.X && y - 2 == lastMove.Y)
                {
                    if ((x + y) % 2 == 0)
                        buttons[x, y].Image = knightblack;
                    else
                        buttons[x, y].Image = knight;
                    progressBar.PerformStep();
                    counter += increment;
                    labelComplete.Text = (counter.ToString() + "%");
                    lastMove.X = x;
                    lastMove.Y = y;
                }
                else 
                {
                    MessageBox.Show("Seems You Have Made An Invalid Move!", "Error: Invalid Move");
                    return;
                }
            }
            else
            {
                if ((x + y) % 2 == 0)
                    buttons[x, y].Image = knightblack;
                else
                    buttons[x, y].Image = knight;
                lastMove.X = x;
                lastMove.Y = y;
                progressBar.PerformStep();
                counter += 100/64;
                labelComplete.Text = ((double)increment).ToString("0.00") + "%";
                firstMove = false;
            }
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Dispose();
        }

        private void exitToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("New Game Started!", "Notice");
            Form form = new Form();
            this.Hide();
            form = new KnightsTour();
            form.Show();
        }

        private void buttonHint_Click(object sender, EventArgs e)
        {
            /* The mass of lines of code below (between the green lines)
          * represents my attempt at verification process.
          * It is an extra function I added. It higlights the users availible moves
          * by putting a red backround in them. */
            //////////////////////////////////////////////////////////////
            bool noMoves = true;
            bool endloop = false;
            if (lastMove.X + 2 >= 0 && lastMove.X + 2 < 8 && lastMove.Y + 1 >= 0 && lastMove.Y + 1 < 8)
                buttons[lastMove.X + 2, lastMove.Y + 1].BackColor = Color.Red;
            if (lastMove.X + 2 >= 0 && lastMove.X + 2 < 8 && lastMove.Y - 1 >= 0 && lastMove.Y - 1 < 8)
                buttons[lastMove.X + 2, lastMove.Y - 1].BackColor = Color.Red;
            if (lastMove.X + 1 >= 0 && lastMove.X + 1 < 8 && lastMove.Y + 2 >= 0 && lastMove.Y + 2 < 8)
                buttons[lastMove.X + 1, lastMove.Y + 2].BackColor = Color.Red;
            if (lastMove.X + 1 >= 0 && lastMove.X + 1 < 8 && lastMove.Y - 2 >= 0 && lastMove.Y - 2 < 8)
                buttons[lastMove.X + 1, lastMove.Y - 2].BackColor = Color.Red;
            if (lastMove.X - 2 >= 0 && lastMove.X - 2 < 8 && lastMove.Y + 1 >= 0 && lastMove.Y + 1 < 8)
                buttons[lastMove.X - 2, lastMove.Y + 1].BackColor = Color.Red;
            if (lastMove.X - 2 >= 0 && lastMove.X - 2 <= 8 && lastMove.Y - 1 >= 0 && lastMove.Y - 1 < 8)
                buttons[lastMove.X - 2, lastMove.Y - 1].BackColor = Color.Red;
            if (lastMove.X - 1 >= 0 && lastMove.X - 1 < 8 && lastMove.Y + 2 >= 0 && lastMove.Y + 2 < 8)
                buttons[lastMove.X - 1, lastMove.Y + 2].BackColor = Color.Red;
            if (lastMove.X - 1 >= 0 && lastMove.X - 1 < 8 && lastMove.Y - 2 >= 0 && lastMove.Y - 2 < 8)
                buttons[lastMove.X - 1, lastMove.Y - 2].BackColor = Color.Red;
            ///////////////////////////////////////////////////////////////
            for (int i = 0; i < 8; i++)
            {
                for (int j = 0; j < 8; j++)
                {
                    if (endloop == false)
                        if (buttons[i, j].BackColor == Color.Red)
                        {
                            noMoves = false;
                            endloop = true;
                        }
                }
            }
            if (noMoves == true)
                MessageBox.Show("You Are Out Of Moves... Please Start A New Game!", "No Moves Availible");
        }

        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            aboutForm about = new aboutForm();
            about.ShowDialog();
        }

        private void instructionsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            instructionForm instructions = new instructionForm();
            instructions.ShowDialog();
        }
    }
}