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

namespace Orbit_Defender
{
    /// <summary>
    /// This is the class for the application launcher - the GUI responsible for recieving initialization instructions from the user.
    /// </summary>
    public partial class Launcher : Form
    {
        /// <summary>
        /// Handles the click event of the launch button control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
        private void bLaunch_Click(object sender, EventArgs e)
        {
            #region Set application settings.

            // Store application settings.
            try
            {
                using (StreamWriter settings = new StreamWriter("Orbit Defender.ini"))
                {
                    settings.WriteLine(tbResolutionSlider.Value); // Resolution slider value.
                    settings.WriteLine(cbWindowed.Checked);       // Checkbox checked value.
                }
            }
            catch (UnauthorizedAccessException)
            {
                // << THIS IS WHERE I GET TO. >>
            }

            #endregion

            #region Determine the height and the width.

            // Define temporary variables to hold the height/width.
            Int32 height = 0;
            Int32 width = 0;

            // Switch the resolution slider value variable.
            switch (tbResolutionSlider.Value)
            {
                // 640 by 480.
                case 0:
                    height = 480;
                    width = 640;
                    break;

                // 600 by 600.
                case 1:
                    height = 600;
                    width = 800;
                    break;

                // 1024 by 768.
                case 2:
                    height = 768;
                    width = 1024;
                    break;

                // 1152 by 864.
                case 3:
                    height = 864;
                    width = 1152;
                    break;

                // 1280 by 1024.
                case 4:
                    height = 1024;
                    width = 1280;
                    break;

                // Something mighty weird happened - the slider slid too far.
                default:
                    new Exception("tbResolutionSlider.Value was out of range.");
                    break;
            }

            #endregion

            // Set the height and the width.
            Logic.Height = height;
            Logic.Width = width;

            // Shall the game be windowed?
            Logic.Windowed = cbWindowed.Checked;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="Launcher"/> class.
        /// </summary>
        public Launcher()
        {
            // Initialize the component.
            InitializeComponent();
        }

        /// <summary>
        /// Handles the Load event of the Launcher window.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
        private void Launcher_Load(object sender, EventArgs e)
        {
            try
            {
                // Open the settings file.
                using (StreamReader settings = new StreamReader("Orbit Defender.ini"))
                {
                    #region Determine the scrollbar value.

                    // Get the scrollbar value.
                    switch (settings.ReadLine().Trim())
                    {
                        // Resolution is 640 by 480.
                        case "0":
                            tbResolutionSlider.Value = 0;
                            break;

                        // Resolution is 800 by 600.
                        case "1":
                            tbResolutionSlider.Value = 1;
                            break;

                        // Resolution is 1024 by 768.
                        case "2":
                            tbResolutionSlider.Value = 2;
                            break;

                        // Resolution is 1152 by 864.
                        case "3":
                            tbResolutionSlider.Value = 3;
                            break;

                        // Resolution is 1280 by 1024.
                        case "4":
                            tbResolutionSlider.Value = 4;
                            break;

                        // Invalid value in settings file.
                        default:
                            new Exception("Invalid value on first line of settings value - value must be 0 to 4.");
                            break;
                    }

                    #endregion

                    #region Determine whether or not the checkbox should be pre-checked.

                    // Get the checkbox value.
                    switch (settings.ReadLine().Trim().ToLower())
                    {
                        // The windowed checkbox should be checked.
                        case "true":
                            cbWindowed.Checked = true;
                            break;

                        // The windowed checkbox should not be checked.
                        case "false":
                            cbWindowed.Checked = false;
                            break;

                        // Invalid value.
                        default:
                            new Exception("Invalid value on line 2 of settings file; value must be True or False.");
                            break;
                    }

                    #endregion
                }
            }
            catch (FileNotFoundException)
            {
                // Create the file.
                File.Create("Orbit Defender.ini");
                File.SetAttributes("Orbit Defender.ini", FileAttributes.Hidden);
            }
            catch (NullReferenceException)
            {
                // File is empty - it will be populated soon. Do nothing just now.
            }
        }
    }
}