// EMERGENT GAME TECHNOLOGIES PROPRIETARY INFORMATION
//
// This software is supplied under the terms of a license agreement or
// nondisclosure agreement with Emergent Game Technologies and may not 
// be copied or disclosed except in accordance with the terms of that 
// agreement.
//
//      Copyright (c) 1996-2007 Emergent Game Technologies.
//      All Rights Reserved.
//
// Emergent Game Technologies, Chapel Hill, North Carolina 27517
// http://www.emergent.net

using System;
using System.Collections;
using System.Threading;
using System.Windows.Forms;
using System.Diagnostics;
using Emergent.Gamebryo.SceneDesigner.Framework;
using Emergent.Gamebryo.SceneDesigner.PluginAPI;
using Emergent.Gamebryo.SceneDesigner.PluginAPI.StandardServices;

namespace Emergent.Gamebryo.SceneDesigner.GUI
{
	public class SelectionSetPanel : Form
	{
        #region Private Data
	    private ISelectionSetService m_selectionSetService;
        private ISelectionService ms_pmSelectionService = null;
        private IUICommandService m_uiCommandService;
        private ServiceProvider m_serviceProvider;
        #endregion

        private System.Windows.Forms.ListBox m_lbSelectionSets;
        private System.Windows.Forms.Button m_btnAdd;
        private System.Windows.Forms.Button m_btnRename;
        private System.Windows.Forms.Button m_btnRemove;
        private System.Windows.Forms.Button m_btnSelect;
        private System.Windows.Forms.Label m_lblSelectionSets;
        private System.Windows.Forms.Label m_lblDummy;
		private System.ComponentModel.IContainer components = null;

		public SelectionSetPanel()
		{
			// This call is required by the Windows Form Designer.
			InitializeComponent();
            AttachToEventManager();
            UICommandService.BindCommands(this);
		}

        private ISelectionSetService SelectionSetService
        {
            get
            {
                if (m_selectionSetService == null)
                {
                    
                    m_selectionSetService = 
                        ServiceProvider.GetService(
                        typeof(ISelectionSetService)) as ISelectionSetService;
                }
                return m_selectionSetService;
            }
        }

        private IUICommandService UICommandService
        {
            get
            {
                if (m_uiCommandService == null)
                {
                    m_uiCommandService = 
                        ServiceProvider.GetService(
                        typeof(IUICommandService))
                        as IUICommandService;
                }
                return m_uiCommandService;
            }
        }

	    private ServiceProvider ServiceProvider
	    {
	        get
	        {
                if (m_serviceProvider == null)
                {
                    m_serviceProvider = PluginAPI.ServiceProvider.Instance;
                }
	            return m_serviceProvider;
	        }
	    }

	    /// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
            System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(SelectionSetPanel));
            this.m_lbSelectionSets = new System.Windows.Forms.ListBox();
            this.m_btnAdd = new System.Windows.Forms.Button();
            this.m_btnRename = new System.Windows.Forms.Button();
            this.m_btnRemove = new System.Windows.Forms.Button();
            this.m_btnSelect = new System.Windows.Forms.Button();
            this.m_lblSelectionSets = new System.Windows.Forms.Label();
            this.m_lblDummy = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // m_lbSelectionSets
            // 
            this.m_lbSelectionSets.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
                | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right)));
            this.m_lbSelectionSets.IntegralHeight = false;
            this.m_lbSelectionSets.Location = new System.Drawing.Point(8, 32);
            this.m_lbSelectionSets.Name = "m_lbSelectionSets";
            this.m_lbSelectionSets.SelectionMode = System.Windows.Forms.SelectionMode.MultiExtended;
            this.m_lbSelectionSets.Size = new System.Drawing.Size(400, 288);
            this.m_lbSelectionSets.Sorted = true;
            this.m_lbSelectionSets.TabIndex = 1;
            this.m_lbSelectionSets.KeyDown += new System.Windows.Forms.KeyEventHandler(this.m_lbSelectionSets_KeyDown);
            this.m_lbSelectionSets.DoubleClick += new System.EventHandler(this.m_lbSelectionSets_DoubleClick);
            // 
            // m_btnAdd
            // 
            this.m_btnAdd.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
            this.m_btnAdd.FlatStyle = System.Windows.Forms.FlatStyle.System;
            this.m_btnAdd.Location = new System.Drawing.Point(140, 360);
            this.m_btnAdd.Name = "m_btnAdd";
            this.m_btnAdd.Size = new System.Drawing.Size(64, 23);
            this.m_btnAdd.TabIndex = 4;
            this.m_btnAdd.Text = "Add";
            this.m_btnAdd.Click += new System.EventHandler(this.m_btnAdd_Click);
            // 
            // m_btnRename
            // 
            this.m_btnRename.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
            this.m_btnRename.FlatStyle = System.Windows.Forms.FlatStyle.System;
            this.m_btnRename.Location = new System.Drawing.Point(212, 328);
            this.m_btnRename.Name = "m_btnRename";
            this.m_btnRename.Size = new System.Drawing.Size(64, 23);
            this.m_btnRename.TabIndex = 3;
            this.m_btnRename.Text = "Rename";
            this.m_btnRename.Click += new System.EventHandler(this.m_btnRename_Click);
            // 
            // m_btnRemove
            // 
            this.m_btnRemove.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
            this.m_btnRemove.FlatStyle = System.Windows.Forms.FlatStyle.System;
            this.m_btnRemove.Location = new System.Drawing.Point(212, 360);
            this.m_btnRemove.Name = "m_btnRemove";
            this.m_btnRemove.Size = new System.Drawing.Size(64, 23);
            this.m_btnRemove.TabIndex = 5;
            this.m_btnRemove.Text = "Remove";
            this.m_btnRemove.Click += new System.EventHandler(this.m_btnRemove_Click);
            // 
            // m_btnSelect
            // 
            this.m_btnSelect.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
            this.m_btnSelect.FlatStyle = System.Windows.Forms.FlatStyle.System;
            this.m_btnSelect.Location = new System.Drawing.Point(140, 328);
            this.m_btnSelect.Name = "m_btnSelect";
            this.m_btnSelect.Size = new System.Drawing.Size(64, 23);
            this.m_btnSelect.TabIndex = 2;
            this.m_btnSelect.Text = "Select";
            this.m_btnSelect.Click += new System.EventHandler(this.m_btnSelect_Click);
            // 
            // m_lblSelectionSets
            // 
            this.m_lblSelectionSets.AutoSize = true;
            this.m_lblSelectionSets.Location = new System.Drawing.Point(8, 8);
            this.m_lblSelectionSets.Name = "m_lblSelectionSets";
            this.m_lblSelectionSets.Size = new System.Drawing.Size(80, 16);
            this.m_lblSelectionSets.TabIndex = 0;
            this.m_lblSelectionSets.Text = "Selection Sets:";
            // 
            // m_lblDummy
            // 
            this.m_lblDummy.Location = new System.Drawing.Point(144, 152);
            this.m_lblDummy.Name = "m_lblDummy";
            this.m_lblDummy.Size = new System.Drawing.Size(8, 8);
            this.m_lblDummy.TabIndex = 6;
            // 
            // SelectionSetPanel
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.AutoScroll = true;
            this.ClientSize = new System.Drawing.Size(416, 390);
            this.Controls.Add(this.m_btnSelect);
            this.Controls.Add(this.m_btnAdd);
            this.Controls.Add(this.m_btnRename);
            this.Controls.Add(this.m_btnRemove);
            this.Controls.Add(this.m_lblSelectionSets);
            this.Controls.Add(this.m_lbSelectionSets);
            this.Controls.Add(this.m_lblDummy);
            this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
            this.Name = "SelectionSetPanel";
            this.Text = "Selection Sets";
            this.Load += new System.EventHandler(this.SelectionSetPanel_Load);
            this.ResumeLayout(false);

        }
		#endregion

        #region EventManager Handlers

        private void EventManager_NewSceneLoaded(MScene pmScene)
        {
            SyncListBoxToSelectionManager();
        }

        private void EventManager_SelectionSetRemovedFromScene(MScene pmScene,
            MSelectionSet pmSelectionSet)
        {
            SyncListBoxToSelectionManager();
        }

        private void EventManager_SelectionSetAddedToScene(MScene pmScene, 
            MSelectionSet pmSelectionSet)
        {
            SyncListBoxToSelectionManager();
        }

        private void EventManager_SelectionSetNameChanged(
            MSelectionSet pmSelectionSet, string strOldName, bool bInBatch)
        {
            MFramework.Instance.Scene.Dirty = true;
            SyncListBoxToSelectionManager();
        }

        #endregion

        #region Private Helpers


	    private ISelectionService SelectionService
        {
            get
            {
                if (ms_pmSelectionService == null)
                {
                    ms_pmSelectionService = ServiceProvider.Instance
                        .GetService(typeof(ISelectionService)) as
                        ISelectionService;
                    Debug.Assert(ms_pmSelectionService != null,
                        "Selection service not found!");
                }
                return ms_pmSelectionService;
            }
        }

        private void AttachToEventManager()
        {
            MFramework fw = MFramework.Instance;
            fw.EventManager.SelectionSetAddedToScene +=
                new MEventManager.__Delegate_SelectionSetAddedToScene(
                EventManager_SelectionSetAddedToScene);
            fw.EventManager.SelectionSetRemovedFromScene +=
                new MEventManager.__Delegate_SelectionSetRemovedFromScene(
                EventManager_SelectionSetRemovedFromScene);
            fw.EventManager.SelectionSetNameChanged +=
                new MEventManager.__Delegate_SelectionSetNameChanged(
                EventManager_SelectionSetNameChanged);
            fw.EventManager.NewSceneLoaded += 
                new MEventManager.__Delegate_NewSceneLoaded(
                EventManager_NewSceneLoaded);
        }

        private void SyncListBoxToSelectionManager()
        {          
            m_lbSelectionSets.Items.Clear();
            MSelectionSet[] selectionSets = 
                SelectionSetService.GetSelectionSets();
            foreach (MSelectionSet selectionSet in selectionSets)
            {
                m_lbSelectionSets.Items.Add(selectionSet.Name);
            }
        }
        
        #endregion

        #region WinForms event handlers

        private void SelectionSetPanel_Load(object sender, System.EventArgs e)
        {
            SyncListBoxToSelectionManager();
        }

        private void m_btnSelect_Click(object sender, System.EventArgs e)
        {
            SelectionService.ClearSelectedEntities();
            ListBox.SelectedIndexCollection indeces = 
                m_lbSelectionSets.SelectedIndices;
            foreach (int index in indeces)
            {
                string name = m_lbSelectionSets.GetItemText(
                    m_lbSelectionSets.Items[index]);
                MSelectionSet selectionSet = 
                    SelectionSetService.GetSelectionSetByName(name);
                SelectionService.AddSelectionSetToSelection(selectionSet);
            }
            m_lbSelectionSets.SelectedIndex = -1;
        }

        private void m_btnRename_Click(object sender, System.EventArgs e)
        {
            SelectionSetNameDlg dlg = new SelectionSetNameDlg();
            dlg.Text = "Rename Selection Set";
            string name = m_lbSelectionSets.SelectedItem as string;
            dlg.NewName = name;
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                string newName = dlg.NewName;
                MSelectionSet selectionSet =
                    SelectionSetService.GetSelectionSetByName(name);
                if (!name.Equals(newName))
                {
                    MSelectionSet existingSet = 
                        SelectionSetService.GetSelectionSetByName(newName);
                    if (existingSet == null)
                    {
                        selectionSet.Name = dlg.NewName;
                    }
                    else
                    {
                        MessageBox.Show("Selection Set "
                            + newName + " Already Exists.");
                    }
                }
            }        
        }
        
        private void m_btnAdd_Click(object sender, System.EventArgs e)
        {
            SelectionSetNameDlg dlg = new SelectionSetNameDlg();
            dlg.Text = "Add New Selection Set";
            dlg.NewName = MFramework.Instance.Scene.GetUniqueSelectionSetName(
                "Selection Set 01");
            if (dlg.ShowDialog() == DialogResult.OK)
            {                
                MSelectionSet preexistingSelectionSet = 
                    SelectionSetService.GetSelectionSetByName(dlg.NewName);
                    
                if (preexistingSelectionSet != null)
                {
                    if (MessageBox.Show(
                        "A selection set with that name already exists\n" +
                        " would you like to replace it?", "Confirm", 
                        MessageBoxButtons.OKCancel) ==
                        DialogResult.OK)
                    {
                        SelectionSetService.RemoveSelectionSet(
                            preexistingSelectionSet);
                    }
                    else
                    {
                        return;
                    }

                }

                MSelectionSet selectionSet = MSelectionSet.Create(
                    dlg.NewName);
                MEntity[] selectedEntities = 
                    SelectionService.GetSelectedEntities();
                foreach(MEntity entity in selectedEntities)
                {
                    selectionSet.AddEntity(entity);
                }

                SelectionSetService.AddSelectionSet(selectionSet);
            }
        }

        private void m_btnRemove_Click(object sender, System.EventArgs e)
        {
            ListBox.SelectedIndexCollection indeces = 
                m_lbSelectionSets.SelectedIndices;
            ArrayList removalList = new ArrayList();
            foreach (int index in indeces)
            {
                string name = m_lbSelectionSets.GetItemText(
                    m_lbSelectionSets.Items[index]);
                removalList.Add(name);
            }
            foreach (string name in removalList)
            {
                MSelectionSet selectionSet = 
                    SelectionSetService.GetSelectionSetByName(name);
                SelectionSetService.RemoveSelectionSet(selectionSet);
            }
        }

        private void m_lbSelectionSets_KeyDown(object sender, 
            System.Windows.Forms.KeyEventArgs e)
        {
            switch (e.KeyData)
            {
                case Keys.Delete:
                {
                    if (m_btnRemove.Enabled)
                    {
                        m_btnRemove_Click(sender, e);
                    }
                    break;
                }
            }
        }

        private void m_lbSelectionSets_DoubleClick(object sender,
            System.EventArgs e)
        {
            m_btnSelect_Click(sender, e);
        }


        [UICommandHandler("Idle")]
        private void Application_Idle(object sender, EventArgs e)
        {
            //Determine which Buttons should be enabled
            //Select Button, there must be one or more items selected 
            //in the list box
            ListBox.SelectedObjectCollection selectListBoxItems = 
                m_lbSelectionSets.SelectedItems;
            m_btnSelect.Enabled = selectListBoxItems.Count > 0;
            //Rename Button - one and only one listbox itme must be selected
            m_btnRename.Enabled = selectListBoxItems.Count == 1;
            //Add button - there must be one ore more entities selected
            MEntity[] selectedEntities = 
                SelectionService.GetSelectedEntities();
            m_btnAdd.Enabled = selectedEntities.Length > 0;
            //Remove Button - there must be one or more items selected 
            //in the list box
            m_btnRemove.Enabled = selectListBoxItems.Count > 0;

        }

        #endregion
	}
}