using SCI.CursesWrapper;
using SCI.CursesWrapper.UiElements;
using Fahrplan.Screens;
using Mindmagma.Curses;
using Fahrplan.Plan;

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

		// Whilst the intro screen is shown, get the Fahrplan
		var fahrplan = Network.PlanPuller.GetFahrplanAsync ().Result;

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

		// -- Create footer bar -- //
		var footerWindow = new FooterWindow (screen);
		footerWindow.DrawFooter ("Fahrplan", "LLLeft", "RRRRRight");

		// -- Create menu bar -- //
		var menuItems = CreateMenuItems (contentWindow, footerWindow, fahrplan.schedule.conference);
		var topMenu = new TopMenu (screen, inputHandler, menuItems);
		topMenu.ActivateItem (topMenu.MenuItems [1]);

		// 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,
		FooterWindow footer,
		Plan.Conference planConference
	) {
		var helpItem	  = new MenuItem ("Help", "F1");
		var upcomingItem  = new MenuItem ("Upcoming", "u");
		var byDayItem	  = new MenuItem ("By Day", "d");
		var byRoomItem	  = new MenuItem ("By Room", "r");
		var bySpeakerItem = new MenuItem ("By Speaker", "s");
		var quitItem	  = new MenuItem ("Quit (C-q)");

		helpItem.OnItemActivated += (object sender, MenuItemActivatedEventArgs e) => {
			var scrollWindow = contentWindow.CreateInnerScrollWindow ();
			for (int i = 0; i <= 100; i++)
				scrollWindow.AddContent ($"Line {i} {AsciiArt.lorem_ipsum}\n");
			scrollWindow.RenderCurrentViewport ();
		};

		upcomingItem.OnItemActivated += (object sender, MenuItemActivatedEventArgs e) => {
			var scrollWindow = contentWindow.CreateInnerScrollWindow ();
			scrollWindow.AddContent ("-- Upcoming --");

			scrollWindow.RenderCurrentViewport ();
		};

		byRoomItem.OnItemActivated += (object sender, MenuItemActivatedEventArgs e) => {
			var scrollWindow = contentWindow.CreateInnerScrollWindow ();
			footer.DrawFooter ("  Day 1 ->");

			// TODO: Do the actual foo-magic of formatting the plan as a nice text table
			//       and key handling to switch between days
			foreach (var day in planConference.days) {
				scrollWindow.AddContent (DateTime.Parse (day.date).ToString ("dd.MM.yyyy") + $" (Day {day.index})");
				foreach (var room in day.rooms) {
					scrollWindow.AddContent ($"- {room.Key}");
				}
			}

			scrollWindow.RenderCurrentViewport ();
		};

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