#region ================== Copyright (c) 2007 Pascal vd Heiden

/*
 * Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
 * This program is released under GNU General Public License
 * 
 * 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.
 * 
 */

#endregion

#region ================== Namespaces

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using CodeImp.DoomBuilder.Windows;
using CodeImp.DoomBuilder.Map;
using CodeImp.DoomBuilder.Editing;
using CodeImp.DoomBuilder.Actions;
using CodeImp.DoomBuilder.Config;
using CodeImp.DoomBuilder.Geometry;

#endregion

namespace CodeImp.DoomBuilder.BuilderModes
{
	public abstract class BaseClassicMode : ClassicMode
	{
		#region ================== Constants

		protected const int MULTISELECT_START_MOVE_PIXELS = 2; //mxd

		#endregion

		#region ================== Variables

		protected bool paintselectpressed; //mxd
		protected bool marqueSelectionIncludesThings; //mxd
		
		#endregion

		#region ================== Properties

		#endregion

		#region ================== Constructor / Disposer

		// Constructor
		public BaseClassicMode()
		{
			// Initialize

			// We have no destructor
			GC.SuppressFinalize(this);
		}

		// Disposer
		public override void Dispose()
		{
			// Not already disposed?
			if(!isdisposed)
			{
				// Clean up

				// Done
				base.Dispose();
			}
		}

		#endregion

		#region ================== Methods

		// This occurs when the user presses Copy. All selected geometry must be marked for copying!
		public override bool OnCopyBegin()
		{
			General.Map.Map.MarkAllSelectedGeometry(true, false, true, true, false);

			// Return true when anything is selected so that the copy continues
			// We only have to check vertices for the geometry, because without selected
			// vertices, no complete structure can exist.
			return (General.Map.Map.GetMarkedVertices(true).Count > 0) ||
				   (General.Map.Map.GetMarkedThings(true).Count > 0);
		}
		
		// This is called when pasting begins
		public override bool OnPasteBegin(PasteOptions options)
		{
			// These modes support pasting
			return true;
		}
		
		// This is called when something was pasted.
		public override void OnPasteEnd(PasteOptions options)
		{
			General.Map.Map.ClearAllSelected();
			General.Map.Map.SelectMarkedGeometry(true, true);
			General.Map.Renderer2D.UpdateExtraFloorFlag(); //mxd
			
			// Switch to EditSelectionMode
			EditSelectionMode editmode = new EditSelectionMode();
			editmode.Pasting = true;
			editmode.PasteOptions = options;
			General.Editing.ChangeMode(editmode);
		}

		// Double-clicking
		public override void OnMouseDoubleClick(MouseEventArgs e)
		{
			base.OnMouseDoubleClick(e);

			int k = 0;
			if(e.Button == MouseButtons.Left) k = (int)Keys.LButton;
			if(e.Button == MouseButtons.Middle) k = (int)Keys.MButton;
			if(e.Button == MouseButtons.Right) k = (int)Keys.RButton;
			if(e.Button == MouseButtons.XButton1) k = (int)Keys.XButton1;
			if(e.Button == MouseButtons.XButton2) k = (int)Keys.XButton2;
			
			// Double select-click? Make that the same as single edit-click
			if(General.Actions.GetActionByName("builder_classicselect").KeyMatches(k))
			{
				Actions.Action a = General.Actions.GetActionByName("builder_classicedit");
				if(a != null) a.Invoke();
			}
		}

		//mxd
		protected override void OnUpdateMultiSelection() {
			base.OnUpdateMultiSelection();

			if(General.Interface.CtrlState && General.Interface.ShiftState)
				marqueSelectionMode = MarqueSelectionMode.INTERSECT;
			else if(General.Interface.CtrlState)
				marqueSelectionMode = MarqueSelectionMode.SUBTRACT;
			else if(General.Interface.ShiftState ^ BuilderPlug.Me.AdditiveSelect)
				marqueSelectionMode = MarqueSelectionMode.ADD;
			else
				marqueSelectionMode = MarqueSelectionMode.SELECT;

			marqueSelectionIncludesThings = General.Interface.AltState;
		}

		//mxd
		public override void OnUndoEnd() {
			General.Map.Renderer2D.UpdateExtraFloorFlag();
			base.OnUndoEnd();
			UpdateSelectionInfo();
		}

		//mxd
		public override void OnRedoEnd() {
			General.Map.Renderer2D.UpdateExtraFloorFlag();
			base.OnRedoEnd();
			UpdateSelectionInfo();
		}

		//mxd
		public override void OnMapTestEnd(bool testFromCurrentPosition) {
			base.OnMapTestEnd(testFromCurrentPosition);
			General.Interface.RedrawDisplay(); // Redraw display to hide changes :)
		}

		//mxd
		public virtual void UpdateSelectionInfo() {
			General.Interface.DisplayStatus(StatusType.Selection, string.Empty);
		}

		//mxd
		protected void placeThingsAtPositions(List<Vector2D> positions) {
			if (positions.Count < 1) {
				General.Interface.DisplayStatus(StatusType.Warning, "This action requires selection of some description!");
				return;
			}

			General.Map.UndoRedo.CreateUndo("Place " + (positions.Count > 1 ? "things" : "thing"));
			List<Thing> things = new List<Thing>();

			// Create things
			foreach (Vector2D pos in positions) {
				Thing t = General.Map.Map.CreateThing();
				if(t != null) {
					General.Settings.ApplyDefaultThingSettings(t);
					t.Move(pos);
					t.UpdateConfiguration();
					t.Selected = true;
					t.SnapToAccuracy(); // Snap to map format accuracy
					things.Add(t);
				}
			}

			//Operation failed?..
			if (things.Count < 1) {
				General.Interface.DisplayStatus(StatusType.Warning, "This action requires selection of some description!");
				General.Map.UndoRedo.WithdrawUndo();
				return;
			}

			//Show realtime thing edit dialog
			General.Interface.OnEditFormValuesChanged += thingEditForm_OnValuesChanged;
			if (General.Interface.ShowEditThings(things) == DialogResult.Cancel) {
				General.Map.UndoRedo.WithdrawUndo();
			} else {
				General.Interface.DisplayStatus(StatusType.Info, "Placed " + things.Count + " things.");
			}
			General.Interface.OnEditFormValuesChanged -= thingEditForm_OnValuesChanged;
		}
		
		#endregion

		#region ================== Events (mxd)

		//mxd
		private void thingEditForm_OnValuesChanged(object sender, EventArgs e) {
			// Update things filter
			General.Map.ThingsFilter.Update();

			// Update entire display
			General.Interface.RedrawDisplay();
		}

		#endregion

		#region ================== Actions

		[BeginAction("placevisualstart")]
		public void PlaceVisualStartThing()
		{
			Thing thingfound = null;
			
			// Not during volatile mode
			if(this.Attributes.Volatile) return;
			
			// Mouse must be inside window
			if(!mouseinside) return;
			
			General.Interface.DisplayStatus(StatusType.Action, "Placed Visual Mode camera start thing.");
			
			// Go for all things
			List<Thing> things = new List<Thing>(General.Map.Map.Things);
			foreach(Thing t in things)
			{
				if(t.Type == General.Map.Config.Start3DModeThingType)
				{
					if(thingfound == null)
					{
						// Move this thing
						t.Move(mousemappos);
						thingfound = t;
					}
					else
					{
						// One was already found and moved, delete this one
						t.Dispose();
					}
				}
			}
			
			// No thing found?
			if(thingfound == null)
			{
				// Make a new one
				Thing t = General.Map.Map.CreateThing();
				if(t != null)
				{
					t.Type = General.Map.Config.Start3DModeThingType;
					t.Move(mousemappos);
					t.UpdateConfiguration();
					General.Map.ThingsFilter.Update();
					thingfound = t;
				}
			}

			if(thingfound != null)
			{
				// Make sure that the found thing is between ceiling and floor
				thingfound.DetermineSector();
				if(thingfound.Position.z < 0.0f) thingfound.Move(thingfound.Position.x, thingfound.Position.y, 0.0f);
				if(thingfound.Sector != null)
				{
					if((thingfound.Position.z + 50.0f) > (thingfound.Sector.CeilHeight - thingfound.Sector.FloorHeight))
						thingfound.Move(thingfound.Position.x, thingfound.Position.y,
							thingfound.Sector.CeilHeight - thingfound.Sector.FloorHeight - 50.0f);
				}
			}
			
			// Update Visual Mode camera
			General.Map.VisualCamera.PositionAtThing();
			
			// Redraw display to show changes
			General.Interface.RedrawDisplay();
		}

		//mxd
		[BeginAction("classicpaintselect")]
		protected virtual void OnPaintSelectBegin() {
			paintselectpressed = true;
		}

		//mxd
		[EndAction("classicpaintselect")]
		protected virtual void OnPaintSelectEnd() {
			paintselectpressed = false;
		}

		//mxd
		[BeginAction("togglehighlight")]
		public void ToggleHighlight() {
			BuilderPlug.Me.UseHighlight = !BuilderPlug.Me.UseHighlight;
			General.Interface.DisplayStatus(StatusType.Action, "Highlight is now " + (BuilderPlug.Me.UseHighlight ? "ON" : "OFF") + ".");

			// Redraw display to show changes
			General.Interface.RedrawDisplay();
		}

		//mxd
		[BeginAction("thingsselectinsectors")]
		public void SelectThingsInSelectedSectors() {
			General.Map.Map.ConvertSelection(SelectionType.Sectors);

			if(General.Map.Map.SelectedSectorsCount == 0) {
				General.Interface.DisplayStatus(StatusType.Warning, "No Sectors are Selected!");
				General.Map.Map.ConvertSelection(SelectionType.Linedefs);
				return;
			}

			int selectedCount = 0;
			ICollection<Sector> sectors = General.Map.Map.GetSelectedSectors(true);

			foreach(Thing t in General.Map.Map.Things) {
				t.DetermineSector();

				if(!t.Selected && t.Sector != null && sectors.Contains(t.Sector)) {
					t.Selected = true;
					selectedCount++;
				}
			}

			General.Interface.DisplayStatus(StatusType.Info, "Selected " + selectedCount + (selectedCount == 1 ? " Thing" : " Things"));
			General.Map.Map.ConvertSelection(SelectionType.Linedefs);

			// Redraw screen
			General.Interface.RedrawDisplay();
		}

		#endregion
	}
}