using System;
using System.Diagnostics;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using freetrain.contributions.land;
using freetrain.contributions.common;
using freetrain.contributions.sound;
using freetrain.views;
using freetrain.views.map;
using freetrain.world;
using freetrain.world.terrain;
using freetrain.framework;
using freetrain.framework.graphics;
using freetrain.framework.plugin;
using freetrain.util;

namespace freetrain.controllers.land
{
	/// <summary>
	/// Controller that allows the user to
	/// place/remove lands.
	/// </summary>
	public class LandController : ControllerHostForm
	{
		#region Singleton instance management
		/// <summary>
		/// Creates a new controller window, or active the existing one.
		/// </summary>
		public static void create() {
			if(theInstance==null)
				theInstance = new LandController();
			theInstance.Show();
			theInstance.Activate();
		}

		private static LandController theInstance;

		protected override void OnClosing(CancelEventArgs e) {
			base.OnClosing(e);
			theInstance = null;
		}
		#endregion

		private Bitmap previewBitmap;

		protected LandController() {
			InitializeComponent();

			// load list of lands
			groupBox.DataSource = Core.plugins.landBuilderGroup;
			groupBox.DisplayMember="name";
		}

		protected override void Dispose( bool disposing ) {
			if( disposing && components != null)
				components.Dispose();
			base.Dispose( disposing );
			
			if( previewBitmap!=null )
				previewBitmap.Dispose();
		}

		#region Designer generated code
		private System.Windows.Forms.PictureBox preview;
		private System.ComponentModel.IContainer components = null;
		private freetrain.controls.IndexSelector indexSelector;
		private System.Windows.Forms.ComboBox groupBox;

		private void InitializeComponent()
		{
			this.groupBox = new System.Windows.Forms.ComboBox();
			this.preview = new System.Windows.Forms.PictureBox();
			this.indexSelector = new freetrain.controls.IndexSelector();
			this.SuspendLayout();
			// 
			// groupBox
			// 
			this.groupBox.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.groupBox.Location = new System.Drawing.Point(8, 8);
			this.groupBox.Name = "groupBox";
			this.groupBox.Size = new System.Drawing.Size(112, 20);
			this.groupBox.Sorted = true;
			this.groupBox.TabIndex = 2;
			this.groupBox.SelectedIndexChanged += new System.EventHandler(this.onGroupChanged);
			// 
			// preview
			// 
			this.preview.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.preview.Location = new System.Drawing.Point(8, 64);
			this.preview.Name = "preview";
			this.preview.Size = new System.Drawing.Size(112, 80);
			this.preview.TabIndex = 1;
			this.preview.TabStop = false;
			// 
			// indexSelector
			// 
			this.indexSelector.count = 10;
			this.indexSelector.current = 0;
			this.indexSelector.dataSource = null;
			this.indexSelector.Location = new System.Drawing.Point(8, 36);
			this.indexSelector.Name = "indexSelector";
			this.indexSelector.Size = new System.Drawing.Size(112, 20);
			this.indexSelector.TabIndex = 3;
			this.indexSelector.indexChanged += new System.EventHandler(this.onTypeChanged);
			// 
			// LandController
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 12);
			this.ClientSize = new System.Drawing.Size(128, 180);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.indexSelector,
																		  this.groupBox,
																		  this.preview});
			this.Name = "LandController";
			this.Text = "’n•\";
			this.ResumeLayout(false);

		}
		#endregion



		


		private void onGroupChanged(object sender, System.EventArgs e) {
			indexSelector.dataSource = (LandBuilderGroup)groupBox.SelectedItem;
			onTypeChanged(null,null);
		}

		/// <summary>
		/// Called when a selection of the structure has changed.
		/// </summary>
		protected virtual void onTypeChanged(object sender, System.EventArgs e) {			
			updatePreview();
		}

		public override void updatePreview()
		{
			LandBuilderContribution builder = (LandBuilderContribution)indexSelector.currentItem;
			using( PreviewDrawer drawer = builder.createPreview(preview.Size) ) 
			{
				if( previewBitmap!=null )	previewBitmap.Dispose();
				preview.Image = previewBitmap = drawer.createBitmap();
			}
			currentController = builder.createBuilder(new ControllerSiteImpl(this));
		}
	}
}

