/*
  KeePass Password Safe - The Open-Source Password Manager
  Copyright (C) 2003-2021 Dominik Reichl <dominik.reichl@t-online.de>

  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 2 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, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

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

using KeePass.App;
using KeePass.DataExchange;
using KeePass.Resources;
using KeePass.UI;
using KeePass.Util;

using KeePassLib;
using KeePassLib.Utility;

namespace KeePass.Forms
{
	public partial class AboutForm : Form, IGwmWindow
	{
		public bool CanCloseWithoutDataLoss { get { return true; } }

		public AboutForm()
		{
			InitializeComponent();
			Program.Translation.ApplyTo(this);
		}

		private void OnFormLoad(object sender, EventArgs e)
		{
			GlobalWindowManager.AddWindow(this, this);

			string strVersion = PwDefs.VersionString;

			if(Program.IsDevelopmentSnapshot())
			{
				strVersion += " - Dev.";
				try
				{
					string strExe = WinUtil.GetExecutable();
					FileInfo fi = new FileInfo(strExe);
					strVersion += " " + fi.LastWriteTimeUtc.ToString("yyMMdd");
				}
				catch(Exception) { Debug.Assert(false); }
			}

			const string strParamPlh = @"{PARAM}";
			string strBits = KPRes.BitsA;
			if(strBits.IndexOf(strParamPlh) >= 0)
				strVersion += (" (" + strBits.Replace(strParamPlh,
					(IntPtr.Size * 8).ToString()) + ")");
			else { Debug.Assert(false); }

			string strTitle = PwDefs.ProductName;
			string strDesc = KPRes.Version + " " + strVersion;

			Icon icoSc = AppIcons.Get(AppIconType.Main, new Size(
				DpiUtil.ScaleIntX(48), DpiUtil.ScaleIntY(48)), Color.Empty);
			BannerFactory.CreateBannerEx(this, m_bannerImage, icoSc.ToBitmap(),
				strTitle, strDesc);
			this.Icon = AppIcons.Default;

			Debug.Assert(!m_lblCopyright.AutoSize); // For RTL support
			m_lblCopyright.Text = PwDefs.Copyright + ".";

			string strCompValueHdr = KPRes.Version + "/" + KPRes.Status;
			if(Regex.IsMatch(strCompValueHdr, "\\s"))
				strCompValueHdr = KPRes.Version + " / " + KPRes.Status;

			m_lvComponents.Columns.Add(KPRes.Component, 100);
			m_lvComponents.Columns.Add(strCompValueHdr, 100);

			try { GetAppComponents(strVersion); }
			catch(Exception) { Debug.Assert(false); }

			UIUtil.SetExplorerTheme(m_lvComponents, false);
			UIUtil.ResizeColumns(m_lvComponents, true);
		}

		private void OnFormClosed(object sender, FormClosedEventArgs e)
		{
			GlobalWindowManager.RemoveWindow(this);
		}

		private void GetAppComponents(string strMainVersion)
		{
			ListViewItem lvi = new ListViewItem(PwDefs.ShortProductName);
			lvi.SubItems.Add(strMainVersion);
			m_lvComponents.Items.Add(lvi);

			lvi = new ListViewItem(KPRes.XslStylesheetsKdbx);
			string strPath = WinUtil.GetExecutable();
			strPath = UrlUtil.GetFileDirectory(strPath, true, false);
			strPath += AppDefs.XslFilesDir;
			strPath = UrlUtil.EnsureTerminatingSeparator(strPath, false);
			bool bInstalled = File.Exists(strPath + AppDefs.XslFileHtmlFull);
			bInstalled &= File.Exists(strPath + AppDefs.XslFileHtmlLight);
			bInstalled &= File.Exists(strPath + AppDefs.XslFileHtmlTabular);
			if(!bInstalled) lvi.SubItems.Add(KPRes.NotInstalled);
			else lvi.SubItems.Add(KPRes.Installed);
			m_lvComponents.Items.Add(lvi);

			lvi = new ListViewItem(KPRes.KeePassLibCLong);
			if(!KdbFile.IsLibraryInstalled())
				lvi.SubItems.Add(KPRes.NotInstalled);
			else lvi.SubItems.Add(KdbManager.KeePassVersionString + " (0x" +
				KdbManager.LibraryBuild.ToString("X4") + ")");
			m_lvComponents.Items.Add(lvi);
		}

		private void OnLinkHomepage(object sender, LinkLabelLinkClickedEventArgs e)
		{
			WinUtil.OpenUrl(PwDefs.HomepageUrl, null);
			Close();
		}

		private void OnLinkHelpFile(object sender, LinkLabelLinkClickedEventArgs e)
		{
			AppHelp.ShowHelp(null, null);
			Close();
		}

		private void OnLinkLicenseFile(object sender, LinkLabelLinkClickedEventArgs e)
		{
			AppHelp.ShowHelp(AppDefs.HelpTopics.License, null, true);
			Close();
		}

		private void OnLinkAcknowledgements(object sender, LinkLabelLinkClickedEventArgs e)
		{
			AppHelp.ShowHelp(AppDefs.HelpTopics.Acknowledgements, null, true);
			Close();
		}

		private void OnLinkDonate(object sender, LinkLabelLinkClickedEventArgs e)
		{
			WinUtil.OpenUrl(PwDefs.DonationsUrl, null);
			Close();
		}
	}
}
