/*
Base-Converter - This file is a part of Base Converter
Copyright (C) 2022 Caleb Fontenot <foley2431@gmail.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

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


namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            ToolTip toolTip = new ToolTip();
            toolTip.SetToolTip(autoCompute, "Automatically computes input based on changes made to textbox contents.");

        }
        int paddingOffset = 0, spacingOffset = 0, i = 0;
        public void compute()
        {
            // Define variables
            long decimalNum = 0, hexNum = 0, binNum = 0, octalNum = 0;
            //int paddingOffset = 0,spacingOffset = 0, i = 0;

            try
            { // Extract data from text boxes.
                
                decimalNum = long.Parse(decimalTextBox.Text);
                
                
                binNum = Convert.ToInt64(binaryTextBox.Text, 2);
                
                hexNum = Convert.ToInt64(hexTextBox.Text, 16);
                octalNum = Convert.ToInt64(octalTextBox.Text, 8);
                paddingOffset = int.Parse(paddingOffsetTextBox.Text);
                
            }
            catch
            {
                clearTextboxes();
                MessageBox.Show("Invalid number entered into one of the textboxes!");
            }

            // What does the user want us to convert from?
            if (decimalRadioButton.Checked)
            {
                // The decimal radio button is pressed.
                hexNum = decimalNum;
                binNum = decimalNum;
                octalNum = decimalNum;
                //Refocus the textbox when done.
                currentFocus("decimalTextBox");
            }
            if (octalRadioButton.Checked)
            {
                // The octal radio button is pressed.
                hexNum = octalNum;
                binNum = octalNum;
                decimalNum = octalNum;
                //Refocus the textbox when done.
                currentFocus("octalTextBox");

            }
            if (hexRadioButton.Checked)
            {
                // The hexadecimal radio button is pressed.
                binNum = hexNum;
                decimalNum = hexNum;
                octalNum = hexNum;
                //Refocus the textbox when done.
                currentFocus("hexTextBox");
            }
            if (binaryRadioButton.Checked)
            {
                // The binary radio button is pressed.
                hexNum = binNum;
                decimalNum = binNum;
                octalNum = binNum;
                //Refocus the textbox when done.
                currentFocus("binaryTextBox");
            }
            // Print output
            if (paddingToggle.Checked) // Padding: Add Zeros to the beginning of the string
            {
                string binaryString = Convert.ToString(binNum, 2); // Define string to offset
                int binarySize = binaryString.Length; //count the length of the string.

                if (paddingOffset > binarySize)
                { // Is the decimal offset larger than the size of ths string?
                    while (i != (paddingOffset - binarySize))
                    {
                        binaryString = "0" + binaryString;
                        i++;
                    }
                }
                  //debugLabel.Text = sender.GetType().ToString();
                  binaryTextBox.Text = binaryString;
            }
            else
            {
                binaryTextBox.Text = Convert.ToString(binNum, 2);
            }
            
            hexTextBox.Text = hexNum.ToString("X");
            octalTextBox.Text = Convert.ToString(octalNum, 8);
            decimalTextBox.Text = decimalNum.ToString();
        }
        public void spacing()
        {
            spacingOffset = int.Parse(spacingOffsetTextBox.Text);
            try
            {
            if (spacingToggle.Checked)
                {
                    string binaryString = binaryTextBox.Text; // Define string to offset
                    int binarySize = binaryString.Length; //count the length of the string.
                    i = binarySize;
                    var builder = new StringBuilder(binaryString); // String builder
                    while (i != 0)
                    {
                        if (!(i == binarySize)) // Get rid of trailing space
                        {
                            if (i % spacingOffset == 0) // If i mod spacingOffset equals zero, append a space to the offset specified by i.
                            {
                                builder.Insert(i, " ");
                            }
                            i--;
                        }
                        else
                        {
                            i--;
                        }
                    }
                    binaryTextBox.Text = builder.ToString();
                    //builder = null; // null out builder when done
                    //binaryTextBox.Text = binaryString;
                }
            }
            catch
            {
                MessageBox.Show("Divide by zero");
            }
        }
        private void currentFocus(string focusOn)
        {
            switch (focusOn)
            {
                case "binaryTextBox":
                    binaryTextBox.Focus();
                    break;
                case "hexTextBox":
                    hexTextBox.Focus();
                    break;
                case "octalTextBox":
                    octalTextBox.Focus();
                    break;
                case "decimalTextBox":
                    decimalTextBox.Focus();
                    break;
                default:
                    this.Focus();
                    break;
            }
        }

        private void clearTextboxes()
        {
            hexTextBox.Text = "0";
            binaryTextBox.Text = "0";
            octalTextBox.Text = "0";
            decimalTextBox.Text = "0";
        }

        private void computeButton_Click(object sender, EventArgs e)
        {
            // Remove commas from decimalTextBox before parsing it
            decimalTextBox.Text = decimalTextBox.Text.Replace(",", "");
            // Remove spacing from binaryTextBox before parsing it
            binaryTextBox.Text = binaryTextBox.Text.Replace(" ", "");
            compute();
            spacing();
        }

        private void clearButton_Click(object sender, EventArgs e)
        {
            // Clear the textboxes.
            clearTextboxes();

            // Reset focus to the textbox that is currently selected to be converted to.
            if (decimalRadioButton.Checked)
                currentFocus("decimalTextBox");
            if (hexRadioButton.Checked)
                currentFocus("hexTextBox");
            if (binaryRadioButton.Checked)
                currentFocus("binaryTextBox");
            if (octalRadioButton.Checked)
                currentFocus("octalTextBox");
        }

        private void exitButton_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void binaryRadioButton_CheckedChanged(object sender, EventArgs e)
        {
            currentFocus("binaryTextBox");
        }

        private void hexRadioButton_CheckedChanged(object sender, EventArgs e)
        {
            currentFocus("hexTextBox");
        }

        private void decimalRadioButton_CheckedChanged(object sender, EventArgs e)
        {
            currentFocus("decimalTextBox");
        }

        private void octalRadioButton_CheckedChanged(object sender, EventArgs e)
        {
            currentFocus("octalTextBox");
        }

        private void binaryTextBox_TextChanged(object sender, EventArgs e)
        {
            //debugLabel.Text = sender.GetType().ToString();
            if (autoCompute.Checked & (sender.GetType().ToString().Equals("System.Windows.Forms.TextBox")))
            {
                // Remove commas from decimalTextBox before parsing it
                //decimalTextBox.Text = decimalTextBox.Text.Replace(",", "");
                // Remove spacing from binaryTextBox before parsing it
                binaryTextBox.Text = binaryTextBox.Text.Replace(" ", "");
                compute();
                //spacing();
            }
                
        }

        private void hexTextBox_TextChanged(object sender, EventArgs e)
        {
            //debugLabel.Text = sender.GetType().ToString();
            if (autoCompute.Checked & (sender.GetType().ToString().Equals("System.Windows.Forms.TextBox")))
            {
                // Remove commas from decimalTextBox before parsing it
                decimalTextBox.Text = decimalTextBox.Text.Replace(",", "");
                // Remove spacing from binaryTextBox before parsing it
                binaryTextBox.Text = binaryTextBox.Text.Replace(" ", "");

                compute();
                spacing();
            }
        }
            private void octalTextBox_TextChanged(object sender, EventArgs e)
        {
            //debugLabel.Text = sender.GetType().ToString();
            if (autoCompute.Checked & (sender.GetType().ToString().Equals("System.Windows.Forms.TextBox")))
            {
                // Remove commas from decimalTextBox before parsing it
                decimalTextBox.Text = decimalTextBox.Text.Replace(",", "");
                // Remove spacing from binaryTextBox before parsing it
                binaryTextBox.Text = binaryTextBox.Text.Replace(" ", "");

                compute();
                spacing();
            }
                
        }

        private void decimalTextBox_TextChanged(object sender, EventArgs e)
        {
            //debugLabel.Text = sender.GetType().ToString();
            if (autoCompute.Checked & (sender.GetType().ToString().Equals("System.Windows.Forms.TextBox")))
            {
                // Remove commas from decimalTextBox before parsing it
                //decimalTextBox.Text = decimalTextBox.Text.Replace(",", "");
                // Remove spacing from binaryTextBox before parsing it
                binaryTextBox.Text = binaryTextBox.Text.Replace(" ", "");

                compute();
                Thread.Sleep(250);
                spacing();
            }
        }

        private void paddingToggle_CheckedChanged(object sender, EventArgs e)
        {
            if (paddingToggle.Checked)
            {
                paddingOffsetTextBox.ReadOnly = false;
            }
            else
            {
                paddingOffsetTextBox.ReadOnly = true;
            }
        }

        private void spacingToggle_CheckedChanged(object sender, EventArgs e)
        {
            if (spacingToggle.Checked)
            {
                spacingOffsetTextBox.ReadOnly = false;
            }
            else
            {
                spacingOffsetTextBox.ReadOnly = true;
            }
        }
    }
}