//
// System.Web.UI.RootBuilder
//
// Authors:
// 	Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2003 Ximian, Inc. (http://www.ximian.com)

using System;
using System.Collections;
using System.Web.Compilation;
using System.Web.UI.HtmlControls;

namespace System.Web.UI
{
	public sealed class RootBuilder : TemplateBuilder
	{
		static Hashtable htmlControls;
		static Hashtable htmlInputControls;
		AspComponentFoundry foundry;

		static RootBuilder ()
		{
			htmlControls = new Hashtable (new CaseInsensitiveHashCodeProvider (),
						      new CaseInsensitiveComparer ()); 

			htmlControls.Add ("A", typeof (HtmlAnchor));
			htmlControls.Add ("BUTTON", typeof (HtmlButton));
			htmlControls.Add ("FORM", typeof (HtmlForm));
			htmlControls.Add ("IMG", typeof (HtmlImage));
			htmlControls.Add ("INPUT", "INPUT");
			htmlControls.Add ("SELECT", typeof (HtmlSelect));
			htmlControls.Add ("TABLE", typeof (HtmlTable));
			htmlControls.Add ("TD", typeof (HtmlTableCell));
			htmlControls.Add ("TH", typeof (HtmlTableCell));
			htmlControls.Add ("TR", typeof (HtmlTableRow));
			htmlControls.Add ("TEXTAREA", typeof (HtmlTextArea));

			htmlInputControls = new Hashtable (new CaseInsensitiveHashCodeProvider (),
							   new CaseInsensitiveComparer ());

			htmlInputControls.Add ("BUTTON", typeof (HtmlInputButton));
			htmlInputControls.Add ("SUBMIT", typeof (HtmlInputButton));
			htmlInputControls.Add ("RESET", typeof (HtmlInputButton));
			htmlInputControls.Add ("CHECKBOX", typeof (HtmlInputCheckBox));
			htmlInputControls.Add ("FILE", typeof (HtmlInputFile));
			htmlInputControls.Add ("HIDDEN", typeof (HtmlInputHidden));
			htmlInputControls.Add ("IMAGE", typeof (HtmlInputImage));
			htmlInputControls.Add ("RADIO", typeof (HtmlInputRadioButton));
			htmlInputControls.Add ("TEXT", typeof (HtmlInputText));
			htmlInputControls.Add ("PASSWORD", typeof (HtmlInputText));
		}

		public RootBuilder (TemplateParser parser)
		{
			foundry = new AspComponentFoundry ();
			line = 1;
			fileName = parser.InputFile;
			Init (parser, null, null, null, null, null);
		}

		public override Type GetChildControlType (string tagName, IDictionary attribs) 
		{
			string prefix;
			string cname;
			int colon = tagName.IndexOf (':');
			if (colon != -1) {
				if (colon == 0)
					throw new Exception ("Empty TagPrefix is not valid");

				if (colon + 1 == tagName.Length)
					return null;

				prefix = tagName.Substring (0, colon);
				cname = tagName.Substring (colon + 1);
			} else {
				prefix = "";
				cname = tagName;
			}

			Type t = foundry.GetComponentType (prefix, cname);
			if (t != null)
				return t;
			else if (prefix != "")
				throw new Exception ("TagPrefix " + prefix + " not registered");
			
			return LookupHtmlControls (tagName, attribs);
		}

		static Type LookupHtmlControls (string tagName, IDictionary attribs)
		{
			object o = htmlControls [tagName];
			if (o is string) {
				if (attribs == null)
					throw new HttpException ("Unable to map input type control to a Type.");

				string ctype = attribs ["TYPE"] as string;
				if (ctype == null)
					ctype = "TEXT"; // The default used by MS

				Type t = htmlInputControls [ctype] as Type;
				if (t == null)
					throw new HttpException ("Unable to map input type control to a Type.");

				return t;
			}

			if (o == null)
				o = typeof (HtmlGenericControl);

			return (Type) o;
		}

		internal AspComponentFoundry Foundry {
			get { return foundry; }
		}
	}
}