using SCI.CursesWrapper;
using SCI.CursesWrapper.UiElements;
using ANSI_Fahrplan.Screens;
using Mindmagma.Curses;
using System.Reflection;
using Microsoft.Win32.SafeHandles;

namespace ANSI_Fahrplan;

class Program {
	private static void Main (string [] args) {
		/**
		 * General procedure:
		 * - Draw welcome screen
		 * - User picks the view they want to see
		 * - Data is being pulled from server
		 * - Data is being read, processed and displayed in the selected view
		 * - User can scroll up and down with Up and Down the view if it is longer than one page
		 * - User can change date, room, speaker etc. by pressing left and right
		 * - User can change the list type with function keys
		 **/

		var screen = CursesWrapper.InitNCurses ();
		
		// -- Screen-wide input handler -- //
		var inputHandler = new InputHandler ();
		inputHandler.StartListening ();

		// Register global quit key
		inputHandler.OnKeyPressPrivileged += (object sender, NCursesKeyPressEventArgs e) => {
			if (!CursesWrapper.KeyPressIsCtrl (e.KeyCode, 'q')) return;

			NCurses.EndWin ();
			Console.WriteLine ("Bye-bye!");
			Environment.Exit (0);
		};

		// -- Content Window -- //
		//
		// This window contains all the dynamic content between
		// the menu and status bars
		var contentWindow = new ContentWindow (screen, inputHandler) {
			BorderEnabled = true
		};

		// -- Intro screen -- //
		var introScreen = new IntroScreen (contentWindow);
		introScreen.Draw ();

		// Close intro screen on any keypress
		introScreen.OnKeyPress += (object sender, NCursesKeyPressEventArgs e) => {
			((Window) sender).Destroy ();
		};

		introScreen.RegisterInputHandler (inputHandler);
		introScreen.SetWindowActive ();

		// Wait until intro screen is closed
		while (introScreen.WindowId > -1) Thread.Sleep (50); // TODO; Unjank this

		// -- Create menu bar -- //
		var topMenu = new TopMenu (screen, inputHandler, CreateMenuItems (contentWindow));

		// Testing
		var testwin = contentWindow.CreateInnerWindow ();
		testwin.BackgroundColorId = ColorSchemes.TextInputField ();
		NCurses.WindowAddString (testwin, "Hello World.");
		contentWindow.Draw ();

		// Wait until the input handler routine stops
		while (inputHandler.IsListening ()) Thread.Sleep (50);

		NCurses.EndWin ();
		Console.WriteLine ("Oh wow, the input handler crashed, that's not supposed to happen. Sorry!");
		Environment.Exit (1);
	}

	private static List<MenuItem> CreateMenuItems (ContentWindow contentWindow) {
		var helpItem	  = new MenuItem ("Help", "F1");
		var upcomingItem  = new MenuItem ("Upcoming", "b"); //F2
		var byDayItem	  = new MenuItem ("By Day", "n"); // F3
		var byRoomItem	  = new MenuItem ("By Room", "F4");
		var bySpeakerItem = new MenuItem ("By Speaker", "F5");
		var quitItem	  = new MenuItem ("Quit (C-q)");

		helpItem.OnItemActivated += (object sender, MenuItemActivatedEventArgs e) => {
			contentWindow.Clean ();
			if (contentWindow.TargetInputHandler is null) return;

			var scrollWindow = new ScrollWindow (contentWindow, contentWindow.TargetInputHandler, 30);
			for (int i = 0; i < scrollWindow.PadSize.Height - 1; i++)
				NCurses.WindowAddString (scrollWindow.InnerPadId, $"Line {i}\n");
			NCurses.WindowAddString (scrollWindow.InnerPadId, $"Line {scrollWindow.PadSize.Height}");
			scrollWindow.ShowPad ();
		};

		return new List<MenuItem> {
			helpItem,
			upcomingItem,
			byDayItem,
			byRoomItem,
			bySpeakerItem,
			quitItem
		};
	}
}