//
//  StartPage.cs - the initial Page the user sees at application startup
//
//  Author:
//       Michael Becker <alcexhim@gmail.com>
//
//  Copyright (c) 2019-2021 Mike Becker's Software
//
//  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 <http://www.gnu.org/licenses/>.
using System;
using MBS.Framework;
using MBS.Framework.UserInterface;
using MBS.Framework.UserInterface.Controls;
using MBS.Framework.UserInterface.Controls.ListView;
using MBS.Framework.UserInterface.Layouts;

namespace UniversalEditor.UserInterface.Panels
{
	[ContainerLayout("~/Panels/StartPage.glade", "GtkWindow")]
	public class StartPage : Page
	{
		private Button cmdCreateNewProject;
		private Button cmdOpenExistingProject;
		private Container ctHeaderImage;
		private Container ctHeaderText;
		private ImageView imgHeader;
		private Label lblHeader;
		private Label lblNewsTitle;
		private ListViewControl tvRecentDocuments;

		private TextBox txtDailyTip;
		private Button cmdDailyTipPrevious;
		private Button cmdDailyTipNext;

		public StartPage()
		{
			Title = "Start Page";
		}

		private Guid DAILY_TIP_CURRENT_INDEX = new Guid("{1ca358e7-1f26-48b0-8f37-b63b08cec231}");

		protected override void OnCreated(EventArgs e)
		{
			base.OnCreated(e);

			string[] dailyTips1 = System.IO.File.ReadAllLines(Application.Instance.FindFile("~/Tips/tips.txt", FindFileOptions.All));
			System.Collections.Generic.List<string> dailyTips2 = new System.Collections.Generic.List<string>();
			for (int i = 0; i < dailyTips1.Length; i++)
			{
				if (dailyTips1[i][0] == ';' || String.IsNullOrEmpty(dailyTips1[i]))
					continue;
				dailyTips2.Add(dailyTips1[i]);
			}
			dailyTips = dailyTips2.ToArray();

			dailyTipIndex = Application.Instance.GetSetting<int>(DAILY_TIP_CURRENT_INDEX, 0);

			Application.Instance.BeforeShutdown += delegate
			{
				dailyTipIndex++;
				Application.Instance.SetSetting<int>(DAILY_TIP_CURRENT_INDEX, dailyTipIndex);
			};

			UpdateDailyTip();

			if (cmdCreateNewProject == null)
			{
				Console.WriteLine("ue: startpage: invalid layout ~/Panels/StartPage.glade");
				return;
			}

			cmdCreateNewProject.Click += cmdCreateNewProject_Click;
			cmdOpenExistingProject.Click += cmdOpenExistingProject_Click;
			lblHeader.Text = String.Format(lblHeader.Text, Application.Instance.Title);
			lblNewsTitle.Text = String.Format(lblNewsTitle.Text, Application.Instance.Title);

			string header_bmp = ((UIApplication)Application.Instance).ExpandRelativePath("~/header.bmp");
			if (System.IO.File.Exists(header_bmp))
			{
				imgHeader.Image = MBS.Framework.UserInterface.Drawing.Image.FromFile(header_bmp);
				ctHeaderImage.Visible = true;
				ctHeaderText.Visible = false;
			}
			else
			{
				ctHeaderImage.Visible = false;
				ctHeaderText.Visible = true;
			}

			string[] filenames = ((EditorApplication)Application.Instance).RecentFileManager.GetFileNames();
			foreach (string fileName in filenames)
			{
				TreeModelRow row = new TreeModelRow(new TreeModelRowColumn[]
				{
					new TreeModelRowColumn(tvRecentDocuments.Model.Columns[0], System.IO.Path.GetFileName(fileName))
				});
				row.SetExtraData<string>("FileName", fileName);
				tvRecentDocuments.Model.Rows.Add(row);
			}
		}

		private void UpdateDailyTip()
		{
			if (dailyTipIndex >= 0 && dailyTipIndex < dailyTips.Length)
			{
				txtDailyTip.Text = dailyTips[dailyTipIndex];
			}
		}

		private string[] dailyTips = new string[0];
		private int dailyTipIndex = 0;
		[EventHandler(nameof(cmdDailyTipPrevious), nameof(Button.Click))]
		private void cmdDailyTipPrevious_Click(object sender, EventArgs e)
		{
			dailyTipIndex--;
			if (dailyTipIndex < 0)
			{
				dailyTipIndex = dailyTips.Length - 1;
			}
			UpdateDailyTip();
		}
		[EventHandler(nameof(cmdDailyTipNext), nameof(Button.Click))]
		private void cmdDailyTipNext_Click(object sender, EventArgs e)
		{
			dailyTipIndex++;
			if (dailyTipIndex >= dailyTips.Length)
			{
				dailyTipIndex = 0;
			}
			UpdateDailyTip();
		}

		[EventHandler(nameof(tvRecentDocuments), nameof(ListViewControl.RowActivated))]
		private void tvRecentDocuments_RowActivated(object sender, ListViewRowActivatedEventArgs e)
		{
			if (e.Row != null)
			{
				string fileName = e.Row.GetExtraData<string>("FileName");
				if (fileName != null)
				{
					(ParentWindow as EditorWindow).OpenFile(fileName);
				}
			}
		}

		private void cmdCreateNewProject_Click(object sender, EventArgs e)
		{
			((Application.Instance as UIApplication).CurrentWindow as IHostApplicationWindow)?.NewProject();
		}
		private void cmdOpenExistingProject_Click(object sender, EventArgs e)
		{
			((Application.Instance as UIApplication).CurrentWindow as IHostApplicationWindow)?.OpenProject();
		}
	}
}