using System;
using MatterHackers.Agg;
using MatterHackers.Agg.Platform;
using MatterHackers.Agg.UI;
using MatterHackers.Localizations;
using MatterHackers.MatterControl.ConfigurationPage.PrintLeveling;
using MatterHackers.MatterControl.CustomWidgets;
using MatterHackers.MatterControl.PrinterCommunication;
using MatterHackers.MatterControl.SlicerConfiguration;

namespace MatterHackers.MatterControl.PrinterControls
{
	public class CalibrationControls : FlowLayoutWidget
	{
		private EventHandler unregisterEvents;
		private EditLevelingSettingsWindow editLevelingSettingsWindow;
		private GuiWidget runPrintLevelingButton;

		private TextImageButtonFactory buttonFactory;
		private PrinterConfig printer;

		private CalibrationControls(PrinterConfig printer, ThemeConfig theme)
			: base(FlowDirection.TopToBottom)
		{
			this.printer = printer;
			this.buttonFactory = theme.ButtonFactory;

			var buttonRow = new FlowLayoutWidget()
			{
				Name = "AutoLevelRowItem",
				HAnchor = HAnchor.Stretch,
			};

			buttonRow.AddChild(
				new IconButton(AggContext.StaticData.LoadIcon("leveling_32x32.png", 24, 24, IconColor.Theme), theme)
				{
					Margin = new BorderDouble(right: 6),
					VAnchor = VAnchor.Center
				});

			// label
			buttonRow.AddChild(
				new TextWidget("Software Print Leveling".Localize(), textColor: theme.Colors.PrimaryTextColor, pointSize: theme.DefaultFontSize)
				{
					AutoExpandBoundsToText = true,
					VAnchor = VAnchor.Center,
				});

			buttonRow.AddChild(new HorizontalSpacer());

			// configure button
			runPrintLevelingButton = new TextButton("Configure".Localize(), theme);
			runPrintLevelingButton.Margin = theme.ButtonSpacing;
			runPrintLevelingButton.BackgroundColor = theme.MinimalShade;
			runPrintLevelingButton.VAnchor = VAnchor.Center;
			runPrintLevelingButton.Click += (sender, e) =>
			{
				UiThread.RunOnIdle(() => LevelWizardBase.ShowPrintLevelWizard(printer, LevelWizardBase.RuningState.UserRequestedCalibration));
			};
			buttonRow.AddChild(runPrintLevelingButton);

			// put in the switch
			CheckBox printLevelingSwitch = ImageButtonFactory.CreateToggleSwitch(printer.Settings.GetValue<bool>(SettingsKey.print_leveling_enabled));
			printLevelingSwitch.VAnchor = VAnchor.Center;
			printLevelingSwitch.Margin = new BorderDouble(left: 16);
			printLevelingSwitch.CheckedStateChanged += (sender, e) =>
			{
				printer.Settings.Helpers.DoPrintLeveling(printLevelingSwitch.Checked);
			};

			printer.Settings.PrintLevelingEnabledChanged.RegisterEvent((sender, e) =>
			{
				printLevelingSwitch.Checked = printer.Settings.GetValue<bool>(SettingsKey.print_leveling_enabled);
			}, ref unregisterEvents);

			// only show the switch if leveling can be turned off (it can't if it is required).
			if (!printer.Settings.GetValue<bool>(SettingsKey.print_leveling_required_to_print))
			{
				buttonRow.AddChild(printLevelingSwitch);
			}

			this.AddChild(buttonRow);

			printer.Connection.CommunicationStateChanged.RegisterEvent(PrinterStatusChanged, ref unregisterEvents);
			printer.Connection.EnableChanged.RegisterEvent(PrinterStatusChanged, ref unregisterEvents);

			SetVisibleControls();
		}

		public static SectionWidget CreateSection(PrinterConfig printer, ThemeConfig theme)
		{
			var widget = new CalibrationControls(printer, theme);

			var editButton = new IconButton(AggContext.StaticData.LoadIcon("icon_edit.png", 16, 16, IconColor.Theme), theme);
			editButton.Click += (s, e) =>
			{
				widget.EditOptions();
			};

			return new SectionWidget(
				"Calibration".Localize(),
				widget,
				theme,
				editButton);
		}

		public override void OnClosed(ClosedEventArgs e)
		{
			unregisterEvents?.Invoke(this, null);
			base.OnClosed(e);
		}

		private void EditOptions()
		{
			UiThread.RunOnIdle(() =>
			{
				if (editLevelingSettingsWindow == null)
				{
					editLevelingSettingsWindow = new EditLevelingSettingsWindow(printer.Settings);
					editLevelingSettingsWindow.Closed += (s, e) =>
					{
						editLevelingSettingsWindow = null;
					};
				}
				else
				{
					editLevelingSettingsWindow.BringToFront();
				}
			});
		}

		private void PrinterStatusChanged(object sender, EventArgs e)
		{
			SetVisibleControls();
			this.Invalidate();
		}

		private void SetVisibleControls()
		{
			if (!printer.Settings.PrinterSelected
				|| printer.Connection.CommunicationState == CommunicationStates.Printing
				|| printer.Connection.PrinterIsPaused)
			{
				this.Enabled = false;
				runPrintLevelingButton.Enabled = true; // setting this true when the element is disabled makes the colors stay correct
			}
			else
			{
				this.Enabled = true;
				runPrintLevelingButton.Enabled = printer.Connection.PrinterIsConnected;
			}
		}
	}
}