using System;
using System.Web;
using System.Text.RegularExpressions;

namespace Icaaq.Codeify
{
	/// <summary>
	/// Summary description for Icaaq.
	/// </summary>
	public class MarkupParser
	{		
		public static string Parse(string TextToParse, bool URLIfy)
		{
			string _p = TextToParse;
			//# Här fyller du på med taggar

			_p = QuickTag(_p, "b", "/b", "<b>", "</b>");
			_p = QuickTag(_p, "i", "/i", "<i>", "</i>");

			_p = QuickTag(_p, "list", "/list", "<ul type='square'>", "</ul>");
			_p = QuickTag(_p, "list=A", "/list", "<ol type='A'>", "</ol>");
			_p = QuickTag(_p, "list=1", "/list", "<ol type='1'>", "</ol>");

			_p = QuickTag(_p, "red", "/red", "<font style='color:red;'>", "</font>");
			_p = QuickTag(_p, "blue", "/blue", "<font style='color:blue;'>", "</font>");

			_p = QuickTag(_p, "kod", "/kod", "<P><font style='size:8px; font-family: Verdana, Arial, Helvetica, sans-serif;'>Kod:</font><HR><font style='size:11px; font-family: Verdana, Arial, Helvetica, sans-serif;'>","<BR></font><HR>");
			
			_p = Tag(_p, "email", "/email", "<a href='mailto:##contents##'>##contents##</a>");
			_p = Tag(_p, "img", "/img", "<img src='##contents##'>");
			_p = Tag(_p, "url", "/url", "<a target='_blank' href='##contents##'>##contents##</a>");
			_p = AttributeTag(_p, "url", "/url", "<a target='_blank' href='##attr##'>##contents##</a>");

			if(URLIfy)
			{
				_p = ParseURLs(_p);
			}

			//# Returnerar den parsade texten.
			return _p;
		}
		#region Code area
		private static string SingleTag(string TextToParse, string Tag, string ReplaceTag)
		{			
			string t = TextToParse;
			t.Replace(Tag, ReplaceTag);
			return t;
		}
		private static string QuickTag(string TextToParse, string OpenTag, string CloseTag, string ReplacedOpenTag, string ReplacedCloseTag)
		{			
			string t = TextToParse;
			t = Regex.Replace(t, @"\["+OpenTag+@"\](?<fetch>.*?)\["+CloseTag+@"\]", ReplacedOpenTag+"${fetch}"+ReplacedCloseTag, RegexOptions.IgnoreCase);
			return t;
		}
		private static string Tag(string TextToParse, string OpenTag, string CloseTag, string ReplacementTag)
		{	
			string t = TextToParse;
			t = Regex.Replace(t, @"\["+OpenTag+@"\](?<contents>.*?)\["+CloseTag+@"\]", ReplacementTag.Replace("##contents##","${contents}"));
			return t;		
		}
		private static string AttributeTag(string TextToParse, string OpenTag, string CloseTag, string ReplacementTag)
		{	
			string t = TextToParse;
			t = Regex.Replace(t, @"\["+OpenTag+@"=(?<attribue>.*?)\](?<contents>.*?)\["+CloseTag+@"\]", ReplacementTag.Replace("##contents##","${contents}").Replace("##attr##", "${attribue}"));
			return t;		
		}
		private static string ParseURLs(string TextToParse)
		{
			string t = TextToParse;
			t = Regex.Replace(t, @"(?<non>^|[^""])(?<http>http://|https://|ftp://|mailto:|file://|telnet://|gopher://)(?<www>[\w/#~:.,?+=&%@!\-]*?)([\s.:?\-]*[^\w/#~:.,?+=&%@!\-]|$)", "${non}<a target='_Blank' href='${http}${www}'>${www}</a>${non}");
			t = Regex.Replace(t, @"(?<non>^|[^\w/>])(?<www>www\.[\w/#~:.,?+=&%@!\-]*?)(?<http>[\s.:?\-]*[^\w/#~:.,?+=&%@!\-]|$)", "${non}<a target='_Blank' href='http://${www}'>${www}</a>${non}");
			t = Regex.Replace(t, @"(?<non>^|[^:>\w])(?<email>[\w\.]*@[\w\.\-]*\.\w{2,3})(\b|$)", "${non}<a href='mailto:${email}'>${email}</a>${non}");
			return t;
		}
		#endregion
	}
}