using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

using System.Windows.Forms;

namespace listboxtest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void fastColoredTextBox1_Load(object sender, EventArgs e)
        {

        }

        List<string> FileNames = new List<string>();
        List<string> FullFileNames = new List<string>();
        private void button2_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog fd = new OpenFileDialog())
            {
                fd.Multiselect = true;
                fd.Filter = "Text files|*.txt|Lua Files|*.lua";
                if (fd.ShowDialog() == DialogResult.OK)
                {
                    if (listBox1.Items.Count <= 0)
                    {
                        fastColoredTextBox1.Text = File.ReadAllText(fd.FileName);
                    }

                   listBox1.Items.Add(Path.GetFileName(fd.FileName.ToString()));
                   FileNames.Add(Path.GetFileName(fd.FileName.ToString()));
                   FullFileNames.Add(fd.FileName.ToString());
                }
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            fastColoredTextBox1.Clear();
            fastColoredTextBox1.Refresh();
        }

        private void listBox1_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedIndex != null) //desperate attempt to not catch a null error
            {
                if (FullFileNames.Count > 0 || listBox1.SelectedItems.Count > 0) //checks on null error within the listbox
                {
                   for (int i = 0; i < FullFileNames.Count; i++) //iterate between FullName array. This is the array that stores full path files.
                    {
                        if (FullFileNames[i].Contains(listBox1.SelectedItem.ToString())) //check if fullfile path contains the selected listbox items
                        {
                            if (Path.GetExtension(FullFileNames[i]) == Path.GetExtension(listBox1.SelectedItem.ToString())) //check if the extensions are equal
                            {
                                fastColoredTextBox1.Text = File.ReadAllText(FullFileNames[i]); //read to fastcoloredtextbox
                                break; //stop iterating.
                            }
                        }
                    }
                }
            }
        }
    }
}