/*
Copyright (c) 2018, Lars Brubaker, John Lewin
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies,
either expressed or implied, of the FreeBSD Project.
*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using MatterHackers.Agg;
using MatterHackers.Agg.Platform;
using MatterHackers.Agg.UI;
using MatterHackers.Localizations;
using MatterHackers.MatterControl.CustomWidgets;
using MatterHackers.MatterControl.PartPreviewWindow.PlusTab;
using MatterHackers.MatterControl.PrintLibrary;
using MatterHackers.MatterControl.SlicerConfiguration;
using MatterHackers.VectorMath;
using Newtonsoft.Json;

namespace MatterHackers.MatterControl.PartPreviewWindow
{
	public class MainViewWidget : FlowLayoutWidget
	{
		private EventHandler unregisterEvents;
		private ChromeTabs tabControl;

		private int partCount = 0;
		private ThemeConfig theme;
		private Toolbar statusBar;
		private FlowLayoutWidget tasksContainer;
		private GuiWidget stretchStatusPanel;
		private LinkLabel seeWhatsNewButton;
		private LinkLabel updateAvailableButton;

		public MainViewWidget(ThemeConfig theme)
			: base(FlowDirection.TopToBottom)
		{
			this.AnchorAll();
			this.theme = theme;
			this.Name = "PartPreviewContent";
			this.BackgroundColor = theme.BackgroundColor;

			// Push TouchScreenMode into GuiWidget
			GuiWidget.TouchScreenMode = UserSettings.Instance.IsTouchScreen;

			var extensionArea = new LeftClipFlowLayoutWidget()
			{
				BackgroundColor = theme.TabBarBackground,
				VAnchor = VAnchor.Stretch,
				Padding = new BorderDouble(left: 8)
			};

			tabControl = new ChromeTabs(extensionArea, theme)
			{
				VAnchor = VAnchor.Stretch,
				HAnchor = HAnchor.Stretch,
				BackgroundColor = theme.BackgroundColor,
				BorderColor = theme.MinimalShade,
				Border = new BorderDouble(left: 1),
			};

			tabControl.PlusClicked += (s, e) =>
			{
				UiThread.RunOnIdle(() =>
				{
					this.CreatePartTab().ConfigureAwait(false);
				});
			};

			tabControl.ActiveTabChanged += (s, e) =>
			{
				if (this.tabControl.ActiveTab?.TabContent is PartTabPage tabPage)
				{
					var dragDropData = ApplicationController.Instance.DragDropData;

					// Set reference on tab change
					dragDropData.View3DWidget = tabPage.view3DWidget;
					dragDropData.SceneContext = tabPage.sceneContext;

					ApplicationController.Instance.PrinterTabSelected = true;
				}
				else
				{
					ApplicationController.Instance.PrinterTabSelected = false;
				}

				ApplicationController.Instance.MainTabKey = tabControl.SelectedTabKey;
			};

			// Force the ActionArea to be as high as ButtonHeight
			tabControl.TabBar.ActionArea.MinimumSize = new Vector2(0, theme.ButtonHeight);
			tabControl.TabBar.BackgroundColor = theme.TabBarBackground;
			tabControl.TabBar.BorderColor = theme.BackgroundColor;

			// Force common padding into top region
			tabControl.TabBar.Padding = theme.TabbarPadding.Clone(top: theme.TabbarPadding.Top * 2, bottom: 0);

			// add in a what's new button
			seeWhatsNewButton = new LinkLabel("What's New...".Localize(), theme)
			{
				Name = "What's New Link",
				ToolTipText = "See what's new in this version of MatterControl".Localize(),
				VAnchor = VAnchor.Center,
				Margin = new BorderDouble(10, 0),
				TextColor = theme.TextColor
			};
			seeWhatsNewButton.Click += (s, e) => UiThread.RunOnIdle(() =>
			{
				UserSettings.Instance.set(UserSettingsKey.LastReadWhatsNew, JsonConvert.SerializeObject(DateTime.Now));
				DialogWindow.Show(new HelpPage("What's New"));
			});

			tabControl.TabBar.ActionArea.AddChild(seeWhatsNewButton);

			// add in the update available button
			updateAvailableButton = new LinkLabel("Update Available".Localize(), theme)
			{
				Visible = false,
				Name = "Update Available Link",
				ToolTipText = "There is a new update available for download".Localize(),
				VAnchor = VAnchor.Center,
				Margin = new BorderDouble(10, 0)
			};

			// Register listeners
			UserSettings.Instance.SettingChanged += SetLinkButtonsVisibility;

			RunningInterval showUpdateInterval = null;
			updateAvailableButton.VisibleChanged += (s, e) =>
			{
				if (!updateAvailableButton.Visible)
				{
					if (showUpdateInterval != null)
					{
						UiThread.ClearInterval(showUpdateInterval);
						showUpdateInterval = null;
					}
					return;
				}

				showUpdateInterval = UiThread.SetInterval(() =>
				{
					ShowUpdateAvailableAnimation();
				}, 120);
			};

			SetLinkButtonsVisibility(this, null);
			updateAvailableButton.Click += (s, e) => UiThread.RunOnIdle(() =>
			{
				UpdateControlData.Instance.CheckForUpdate();
				DialogWindow.Show<CheckForUpdatesPage>();
			});

			tabControl.TabBar.ActionArea.AddChild(updateAvailableButton);

			this.AddChild(tabControl);

			ApplicationController.Instance.NotifyPrintersTabRightElement(extensionArea);

			// Store tab
			tabControl.AddTab(
				new ChromeTab("Store", "Store".Localize(), tabControl, new StoreTabPage(theme), theme, hasClose: false)
				{
					MinimumSize = new Vector2(0, theme.TabButtonHeight),
					Name = "Store Tab",
					Padding = new BorderDouble(15, 0),
				});

			// Library tab
			var libraryWidget = new LibraryWidget(this, theme)
			{
				BackgroundColor = theme.BackgroundColor
			};

			tabControl.AddTab(
				new ChromeTab("Library", "Library".Localize(), tabControl, libraryWidget, theme, hasClose: false)
				{
					MinimumSize = new Vector2(0, theme.TabButtonHeight),
					Name = "Library Tab",
					Padding = new BorderDouble(15, 0),
				});

			// Hardware tab
			tabControl.AddTab(
				new ChromeTab(
					"Hardware",
					"Hardware".Localize(),
					tabControl,
					new HardwareTabPage(theme)
					{
						BackgroundColor = theme.BackgroundColor
					},
					theme,
					hasClose: false)
				{
					MinimumSize = new Vector2(0, theme.TabButtonHeight),
					Name = "Hardware Tab",
					Padding = new BorderDouble(15, 0),
				});

			if (ApplicationController.Instance.Workspaces.Count == 0)
			{
				this.CreatePartTab().ConfigureAwait(false);
			}
			
			string tabKey = ApplicationController.Instance.MainTabKey;

			if (string.IsNullOrEmpty(tabKey))
			{
				tabKey = "Hardware";
			}

			// HACK: Restore to the first printer tab if PrinterTabSelected and tabKey not found. This allows sign in/out to remain on the printer tab across different users
			if (!tabControl.AllTabs.Any(t => t.Key == tabKey)
				&& ApplicationController.Instance.PrinterTabSelected)
			{
				var key = tabControl.AllTabs.Where(t => t.TabContent is PrinterTabPage).FirstOrDefault()?.Key;
				if (key != null)
				{
					tabKey = key;
				}
			}

			var brandMenu = new BrandMenuButton(theme)
			{
				HAnchor = HAnchor.Fit,
				VAnchor = VAnchor.Fit,
				BackgroundColor = theme.TabBarBackground,
				Padding = theme.TabbarPadding.Clone(right: theme.DefaultContainerPadding)
			};

			tabControl.TabBar.ActionArea.AddChild(brandMenu, 0);

			// Restore active tabs
			foreach (var workspace in ApplicationController.Instance.Workspaces)
			{
				this.CreatePartTab(workspace);
			}

			tabControl.SelectedTabKey = tabKey;

			statusBar = new Toolbar(theme)
			{
				HAnchor = HAnchor.Stretch,
				VAnchor = VAnchor.Absolute,
				Padding = 1,
				Height = 22,
				BackgroundColor = theme.BackgroundColor,
				Border = new BorderDouble(top: 1),
				BorderColor = theme.BorderColor20,
			};
			this.AddChild(statusBar);

			statusBar.ActionArea.VAnchor = VAnchor.Stretch;

			tasksContainer = new FlowLayoutWidget(FlowDirection.LeftToRight)
			{
				HAnchor = HAnchor.Fit,
				VAnchor = VAnchor.Stretch,
				BackgroundColor = theme.MinimalShade,
				Name = "runningTasksPanel"
			};
			statusBar.AddChild(tasksContainer);

			var tasks = ApplicationController.Instance.Tasks;

			tasks.TasksChanged += (s, e) =>
			{
				RenderRunningTasks(theme, tasks);
			};

			stretchStatusPanel = new GuiWidget()
			{
				HAnchor = HAnchor.Stretch,
				VAnchor = VAnchor.Stretch,
				Padding = new BorderDouble(right: 3),
				Margin = new BorderDouble(right: 2, top: 1, bottom: 1),
				Border = new BorderDouble(1),
				BackgroundColor = theme.MinimalShade.WithAlpha(10),
				BorderColor = theme.SlightShade,
				Width = 200
			};
			statusBar.AddChild(stretchStatusPanel);

			var panelBackgroundColor = theme.MinimalShade.WithAlpha(10);

			statusBar.AddChild(
				this.CreateThemeStatusPanel(theme, panelBackgroundColor));

			statusBar.AddChild(
				this.CreateNetworkStatusPanel(theme));

			this.RenderRunningTasks(theme, tasks);

			// Register listeners
			PrinterSettings.AnyPrinterSettingChanged += Printer_SettingChanged;
			ApplicationController.Instance.OpenPrintersChanged += OpenPrinters_Changed;

			UpdateControlData.Instance.UpdateStatusChanged.RegisterEvent((s, e) =>
			{
				SetLinkButtonsVisibility(s, new StringEventArgs("Unknown"));
			}, ref unregisterEvents);
			
			ApplicationController.Instance.MainView = this;
		}

		private void ShowUpdateAvailableAnimation()
		{
			double displayTime = 1;
			double pulseTime = 1;
			double totalSeconds = 0;
			var textWidgets = updateAvailableButton.Descendants<TextWidget>().Where((w) => w.Visible == true).ToArray();
			Color startColor = theme.TextColor;

			// Show a highlight on the button as the user did not click it
			Animation flashBackground = null;

			flashBackground = new Animation()
			{
				DrawTarget = updateAvailableButton,
				FramesPerSecond = 10,
				Update = (s1, updateEvent) =>
				{
					totalSeconds += updateEvent.SecondsPassed;
					if (totalSeconds < displayTime)
					{
						double blend = AttentionGetter.GetFadeInOutPulseRatio(totalSeconds, pulseTime);
						var color = new Color(startColor, (int)((1 - blend) * 255));
						foreach (var textWidget in textWidgets)
						{
							textWidget.TextColor = color;
						}
					}
					else
					{
						foreach (var textWidget in textWidgets)
						{
							textWidget.TextColor = startColor;
						}
						flashBackground.Stop();
					}
				}
			};

			flashBackground.Start();
		}

		private void SetLinkButtonsVisibility (object s, StringEventArgs e)
		{
			if (UserSettings.Instance.HasLookedAtWhatsNew())
			{
				// hide it
				seeWhatsNewButton.Visible = false;
			}

			if (UpdateControlData.Instance.UpdateStatus == UpdateControlData.UpdateStatusStates.UpdateAvailable)
			{
				updateAvailableButton.Visible = true;
				// if we are going to show the update link hide the whats new link no matter what
				seeWhatsNewButton.Visible = false;
			}
			else
			{
				updateAvailableButton.Visible = false;
			}
		}

		private void OpenPrinters_Changed(object sender, OpenPrintersChangedEventArgs e)
		{
			var activePrinter = e.Printer;

			if (e.Operation == OpenPrintersChangedEventArgs.OperationType.Add)
			{
				if (activePrinter.Settings.PrinterSelected)
				{
					// Create and switch to new printer tab
					tabControl.ActiveTab = this.CreatePrinterTab(activePrinter, theme);
					tabControl.RefreshTabPointers();
				}
			}
			else
			{
				// Close existing printer tabs
				if (tabControl.AllTabs.FirstOrDefault(t => t.TabContent is PrinterTabPage printerTab
						&& printerTab.printer.Settings.ID == activePrinter.Settings.ID) is ITab tab
					&& tab.TabContent is PrinterTabPage printerPage)
				{
					tabControl.RemoveTab(tab);
					tabControl.RefreshTabPointers();
				}
			}
		}

		private GuiWidget CreateNetworkStatusPanel(ThemeConfig theme)
		{
			var networkStatus = new GuiWidget()
			{
				HAnchor = HAnchor.Absolute,
				VAnchor = VAnchor.Stretch,
				Padding = new BorderDouble(right: 3),
				Margin = new BorderDouble(right: 2, top: 1, bottom: 1),
				Border = new BorderDouble(1),
				BackgroundColor = theme.MinimalShade.WithAlpha(10),
				BorderColor = theme.SlightShade,
				Width = 120
			};
			if (ApplicationController.ServicesStatusType != null)
			{
				var instance = Activator.CreateInstance(ApplicationController.ServicesStatusType);
				if (instance is GuiWidget guiWidget)
				{
					guiWidget.HAnchor = HAnchor.Stretch;
					guiWidget.VAnchor = VAnchor.Stretch;
					networkStatus.AddChild(guiWidget);
				}
			}

			return networkStatus;
		}

		private GuiWidget CreateThemeStatusPanel(ThemeConfig theme, Color panelBackgroundColor)
		{
			var themePanel = new GuiWidget()
			{
				HAnchor = HAnchor.Absolute,
				VAnchor = VAnchor.Stretch,
				Padding = new BorderDouble(right: 3),
				Margin = new BorderDouble(right: 2, top: 1, bottom: 1),
				Border = new BorderDouble(1),
				BackgroundColor = panelBackgroundColor,
				BorderColor = theme.SlightShade,
				Cursor = Cursors.Hand,
				ToolTipText = "Theme".Localize(),
				Width = 40
			};

			themePanel.AddChild(
				new ImageWidget(AggContext.StaticData.LoadIcon("theme.png", 16, 16, theme.InvertIcons), false)
				{
					HAnchor = HAnchor.Left | HAnchor.Absolute,
					VAnchor = VAnchor.Center | VAnchor.Absolute,
					Selectable = false
				});

			themePanel.AddChild(
				new ColorButton(theme.PrimaryAccentColor)
				{
					HAnchor = HAnchor.Right | HAnchor.Absolute,
					VAnchor = VAnchor.Center | VAnchor.Absolute,
					Width = 12,
					Height = 12,
					Selectable = false
				});

			themePanel.Click += (s, e) =>
			{
				themePanel.BackgroundColor = theme.DropList.Open.BackgroundColor;

				var menuTheme = AppContext.MenuTheme;
				var widget = new GuiWidget()
				{
					HAnchor = HAnchor.Absolute,
					VAnchor = VAnchor.Fit,
					Width = 650,
					Border = 1,
					BorderColor = theme.DropList.Open.BackgroundColor,
					// Padding = theme.DefaultContainerPadding,
					BackgroundColor = menuTheme.BackgroundColor
				};

				widget.Closed += (s2, e2) =>
				{
					themePanel.BackgroundColor = panelBackgroundColor;
				};

				var section = ApplicationSettingsPage.CreateThemePanel(menuTheme);
				widget.AddChild(section);

				var systemWindow = this.Parents<SystemWindow>().FirstOrDefault();
				systemWindow.ShowPopup(
					new MatePoint(themePanel)
					{
						Mate = new MateOptions(MateEdge.Right, MateEdge.Top),
						AltMate = new MateOptions(MateEdge.Right, MateEdge.Top)
					},
					new MatePoint(widget)
					{
						Mate = new MateOptions(MateEdge.Right, MateEdge.Bottom),
						AltMate = new MateOptions(MateEdge.Right, MateEdge.Bottom)
					});
			};
			return themePanel;
		}

		public ChromeTabs TabControl => tabControl;

		private ChromeTab CreatePrinterTab(PrinterConfig printer, ThemeConfig theme)
		{
			// Printer page is in fixed position
			var tab1 = tabControl.AllTabs.FirstOrDefault();

			var printerTabPage = tab1?.TabContent as PrinterTabPage;
			if (printerTabPage == null
				|| printerTabPage.printer != printer)
			{
				// TODO - call save before remove
				// printerTabPage.sceneContext.SaveChanges();

				if (printerTabPage != null)
				{
					tabControl.RemoveTab(tab1);
				}

				var printerTab = new ChromeTab(
					printer.Settings.GetValue(SettingsKey.printer_name),
					printer.Settings.GetValue(SettingsKey.printer_name),
					tabControl,
					new PrinterTabPage(printer, theme, "unused_tab_title"),
					theme,
					tabImageUrl: ApplicationController.Instance.GetFavIconUrl(oemName: printer.Settings.GetValue(SettingsKey.make)))
				{
					Name = "3D View Tab",
					MinimumSize = new Vector2(120, theme.TabButtonHeight)
				};

				printerTab.CloseClicked += (s, e) =>
				{
					ApplicationController.Instance.ClosePrinter(printer);
				};

				printer.Settings.SettingChanged += Printer_SettingChanged;

				// Unregister listener on Tab close
				printerTab.Closed += (s, e) => printer.Settings.SettingChanged -= Printer_SettingChanged;

				// Add printer into fixed position
				if (tabControl.AllTabs.Any())
				{
					tabControl.AddTab(printerTab, 3);
				}
				else
				{
					tabControl.AddTab(printerTab);
				}

				return printerTab;
			}
			else if (tab1 != null)
			{
				tabControl.ActiveTab = tab1;
				return tab1 as ChromeTab;
			}

			return null;
		}

		public async Task<ChromeTab> CreatePartTab()
		{
			var history = ApplicationController.Instance.Library.PlatingHistory;

			var workspace = new PartWorkspace()
			{
				Name = "New Design".Localize() + (partCount == 0 ? "" : $" ({partCount})"),
				SceneContext = new BedConfig(history)
			};

			partCount++;

			await workspace.SceneContext.LoadContent(
				new EditContext()
				{
					ContentStore = ApplicationController.Instance.Library.PlatingHistory,
					SourceItem = history.NewPlatingItem()
				});

			ApplicationController.Instance.Workspaces.Add(workspace);

			var newTab = CreatePartTab(workspace);
			tabControl.ActiveTab = newTab;

			return newTab;
		}

		public ChromeTab CreatePartTab(PartWorkspace workspace)
		{
			var partTab = new ChromeTab(
				workspace.Name,
				workspace.Name,
				tabControl,
				new PartTabPage(null, workspace.SceneContext, theme, ""),
				theme,
				AggContext.StaticData.LoadIcon("cube.png", 16, 16, theme.InvertIcons))
			{
				Name = "newPart" + tabControl.AllTabs.Count(),
				MinimumSize = new Vector2(120, theme.TabButtonHeight)
			};

			tabControl.AddTab(partTab);

			partTab.CloseClicked += (s, e) =>
			{
				ApplicationController.Instance.Workspaces.Remove(workspace);
			};

			return partTab;
		}

		public override void OnClosed(EventArgs e)
		{
			// Unregister listeners
			PrinterSettings.AnyPrinterSettingChanged -= Printer_SettingChanged;
			UserSettings.Instance.SettingChanged -= SetLinkButtonsVisibility;

			unregisterEvents?.Invoke(this, null);
			base.OnClosed(e);
		}

		private void Printer_SettingChanged(object s, EventArgs e)
		{
			if (s is PrinterSettings printerSettings
				&& e is StringEventArgs stringEvent
				&& stringEvent.Data == SettingsKey.printer_name)
			{
				// Try to find a printer tab for the given printer
				var printerTab = tabControl.AllTabs.FirstOrDefault(t => t.TabContent is PrinterTabPage printerPage && printerPage.printer.Settings.ID == printerSettings.ID) as ChromeTab;
				if (printerTab != null)
				{
					printerTab.Title = printerSettings.GetValue(SettingsKey.printer_name);
				}
			}
		}

		private void RenderRunningTasks(ThemeConfig theme, RunningTasksConfig tasks)
		{
			var rows = tasksContainer.Children.OfType<RunningTaskStatusPanel>().ToList();
			var displayedTasks = new HashSet<RunningTaskDetails>(rows.Select(taskRow => taskRow.taskDetails));
			var runningTasks = tasks.RunningTasks;

			// Remove expired items
			foreach (var row in rows)
			{
				if (!runningTasks.Contains(row.taskDetails))
				{
					row.Close();
				}
			}

			var progressBackgroundColor = new Color(theme.AccentMimimalOverlay, 35);

			// Add new items
			foreach (var taskItem in tasks.RunningTasks.Where(t => !displayedTasks.Contains(t)))
			{
				var runningTaskPanel = new RunningTaskStatusPanel("", taskItem, theme)
				{
					HAnchor = HAnchor.Absolute,
					VAnchor = VAnchor.Stretch,
					Margin = new BorderDouble(right: 2, top: 1, bottom: 1),
					Border = new BorderDouble(1),
					BorderColor = theme.SlightShade,
					ProgressBackgroundColor = progressBackgroundColor,
					Width = 200
				};

				tasksContainer.AddChild(runningTaskPanel);
			}

			tasksContainer.Invalidate();
		}
	}
}