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

namespace FindDifferences
{
	public partial class frmFindDifferences : Form
	{
		public frmFindDifferences()
		{
			InitializeComponent();
		}
		private void frmFindDifferences_Load(object sender, EventArgs e)
		{
			LoadSettings();
			SetupComboBoxes();
		}
		private void LoadSettings()
		{
			Size = Properties.Settings.Default.Size;
			Resize += new EventHandler(frmFindDifferences_Resize);
			Location = Properties.Settings.Default.Location;
			Move += new EventHandler(frmFindDifferences_Move);
			tbCompare.Text = Properties.Settings.Default.CompareFolder;
			tbCompare.TextChanged += new EventHandler(tbCompare_TextChanged);
			tbPdf.Text = Properties.Settings.Default.PdfFolder;
			tbPdf.TextChanged += new EventHandler(tbPdf_TextChanged);
			splitContainer1.SplitterDistance = Properties.Settings.Default.SplitterDistance;
			splitContainer1.SplitterMoved +=new SplitterEventHandler(splitContainer1_SplitterMoved);
			WindowState = Properties.Settings.Default.WindowState;
			cbShowFirst.Checked = Properties.Settings.Default.ShowFirst;
			cbShowFirst.CheckedChanged += new EventHandler(cbShowFirst_CheckedChanged);
		}
		void cbShowFirst_CheckedChanged(object sender, EventArgs e)
		{
			Properties.Settings.Default.ShowFirst = cbShowFirst.Checked;
			SetupDifferences();
		}
		void tbPdf_TextChanged(object sender, EventArgs e)
		{
			Properties.Settings.Default.PdfFolder = tbPdf.Text;
		}
		void tbCompare_TextChanged(object sender, EventArgs e)
		{
			Properties.Settings.Default.CompareFolder = tbCompare.Text;
			SetupComboBoxes();
		}
		void frmFindDifferences_Move(object sender, EventArgs e)
		{
			Properties.Settings.Default.WindowState = WindowState;
			if (WindowState == FormWindowState.Normal)
				Properties.Settings.Default.Location = Location;
		}
		void frmFindDifferences_Resize(object sender, EventArgs e)
		{
			Properties.Settings.Default.WindowState = WindowState;
			if (WindowState == FormWindowState.Normal)
				Properties.Settings.Default.Size = Size;
		}
		private void SetupComboBoxes()
		{
			if (tbCompare.Text != string.Empty)
				LoadComboBoxes();
			else
				DisableComboBoxes();
		}
		private void LoadComboBoxes()
		{
			DirectoryInfo di = new DirectoryInfo(tbCompare.Text);
			if (di.Exists)
			{
				List<string> myFiles1 = new List<string>();
				List<string> myFiles2 = new List<string>();
				foreach (FileInfo myFile in di.GetFiles("*.txt"))
				{
					myFiles1.Add(myFile.Name);
					myFiles2.Add(myFile.Name);
				}
				cmbCompare.SelectedIndexChanged -= new EventHandler(cmbCompare_SelectedIndexChanged);
				cmbWith.SelectedIndexChanged -= new EventHandler(cmbCompare_SelectedIndexChanged);
				cmbCompare.DataSource = myFiles1;
				cmbWith.DataSource = myFiles2;
				cmbCompare.Enabled = true;
				cmbWith.Enabled = true;
				cmbCompare.SelectedIndex = -1;
				cmbWith.SelectedIndex = -1;
				cmbCompare.SelectedIndexChanged += new EventHandler(cmbCompare_SelectedIndexChanged);
				cmbWith.SelectedIndexChanged += new EventHandler(cmbCompare_SelectedIndexChanged);
			}
			else
				DisableComboBoxes();
		}
		void cmbCompare_SelectedIndexChanged(object sender, EventArgs e)
		{
			SetupDifferences();
		}
		private void DisableComboBoxes()
		{
			lbDifferences.Enabled = false;
			cmbCompare.Enabled = false;
			cmbWith.Enabled = false;
		}
		private void SetupDifferences()
		{
			if (cmbCompare.Text != string.Empty && cmbWith.Text != string.Empty)
			{
				List<string> compareList = BuildList(cmbCompare.Text);
				List<string> withList = BuildList(cmbWith.Text);
				RemoveMatches(withList, compareList);
				if (cbShowFirst.Checked) RemoveMultiples(withList);
				lbDifferences.Click -= new EventHandler(lbDifferences_Click);
				//lbDifferences.SelectedIndexChanged -= new EventHandler(lbDifferences_SelectedIndexChanged);
				lblDifferences.Text = withList.Count.ToString() + " Differences";
				lbDifferences.DataSource = withList;
				lbDifferences.Enabled = true;
				//lbDifferences.SelectedIndexChanged += new EventHandler(lbDifferences_SelectedIndexChanged);
				lbDifferences.Click += new EventHandler(lbDifferences_Click);
			}
			else
			{
				lbDifferences.DataSource = null;
				lbDifferences.Enabled = false;
			}
		}

		void lbDifferences_Click(object sender, EventArgs e)
		{
			wb.Navigate("about:blank");
			Clipboard.Clear();
			if (lbDifferences.SelectedValue != null)
			{
				Clipboard.SetText(lbDifferences.SelectedValue.ToString());
				tmr.Enabled = true;
			}
		}
		Regex myRegExpMult = new Regex("'([^']*?)','([^']*)?',([0-9]*,'[^']*?)'");
		private void RemoveMultiples(List<string> withList)
		{
			List<string> multList = new List<string>();
			string last = string.Empty;
			foreach (string str in withList)
			{
				string found = myRegExpMult.Replace(str, "$1.$2");
				if (found == last) multList.Add(str);
				last = found;
			}
			foreach (string str in multList)
				withList.Remove(str);
		}
		void lbDifferences_SelectedIndexChanged(object sender, EventArgs e)
		{
			wb.Navigate("about:blank");
			Clipboard.Clear();
			if (lbDifferences.SelectedValue != null)
			{
				Clipboard.SetText(lbDifferences.SelectedValue.ToString());
				tmr.Enabled = true;
			}
		}

		private void RemoveMatches(List<string> withList, List<string> compareList)
		{
			foreach (string str in compareList)
				if (withList.Contains(str))
					withList.Remove(str);
		}

		private List<string> BuildList(string fileName)
		{
			List<string> myList = new List<string>();
			FileInfo myFile = new FileInfo(tbCompare.Text + "\\" + fileName);
			using (StreamReader sr = myFile.OpenText())
			{
				while (!sr.EndOfStream)
				{
					string str = sr.ReadLine();
					if(str != string.Empty)
						myList.Add(str);
				}
				sr.Close();
			}
			return myList;
		}
		private string CompareFolder
		{
			get 
			{
				if (tbCompare.Text == string.Empty)
					return Environment.GetFolderPath(Environment.SpecialFolder.MyComputer);
				return tbCompare.Text; 
			}
		}
		private string PdfFolder
		{
			get
			{
				if (tbPdf.Text == string.Empty)
					return Environment.GetFolderPath(Environment.SpecialFolder.MyComputer);
				return tbPdf.Text;
			}
		}
		private void btnCompare_Click(object sender, EventArgs e)
		{
			fbd.SelectedPath = CompareFolder;
			if (fbd.ShowDialog() == DialogResult.OK)
				tbCompare.Text = fbd.SelectedPath;
		}
		private void btnPdf_Click(object sender, EventArgs e)
		{
			fbd.SelectedPath = PdfFolder;
			if (fbd.ShowDialog() == DialogResult.OK)
				tbPdf.Text = fbd.SelectedPath;
		}
		private void frmFindDifferences_FormClosing(object sender, FormClosingEventArgs e)
		{
			Properties.Settings.Default.Save();
		}
		Regex myRegExp = new Regex("'([^']*?)','[^']*?',([0-9]*,'[^']*?)'");
		private void tmr_Tick(object sender, EventArgs e)
		{
			tmr.Enabled = false;
			string url = myRegExp.Replace(lbDifferences.SelectedValue.ToString(), tbPdf.Text + @"\$1.pdf#search=""$2""");
			wb.Navigate(url);
		}
		private void btnClosePdf_Click(object sender, EventArgs e)
		{
			wb.Navigate("about:blank");
		}
		private void btnRefresh_Click(object sender, EventArgs e)
		{
			int indCompare = cmbCompare.SelectedIndex;
			int indWith = cmbWith.SelectedIndex;
			LoadComboBoxes();
			cmbCompare.SelectedIndex = indCompare;
			cmbWith.SelectedIndex = indWith;
		}
		private void splitContainer1_SplitterMoved(object sender, SplitterEventArgs e)
		{
			Properties.Settings.Default.SplitterDistance = splitContainer1.SplitterDistance;
		}

		private void btnCopy_Click(object sender, EventArgs e)
		{
			Clipboard.Clear();
			StringBuilder sb = new StringBuilder();
			foreach(string str in lbDifferences.DataSource as List<string>)
			{
				sb.Append(str + "\r\n");
			}
			Clipboard.SetText(sb.ToString());
		}
	}
}