// Radio Bot
// Returns radio stations of your favorite type of music. Advanced bot for students that have finished the tutorial.

using System;
using System.Text.RegularExpressions;

namespace ChatBot 
{
	class RadioBot : BasicBot 
	{
		public override string HandleMessage(string message, string user) 
		{
			MatchCollection matches = getAllRows();
			string reply = "I found these stations: ";
			foreach(Match match in matches) {
				string row = match.ToString();
				if(User.RegexMatch("dc",message))
					Console.WriteLine(row);
				string stationName, city, state, link, genre;
				ExtractDetails(row, out stationName, out city, out state, out link, out genre);
				if(state == "Washington")
					reply += stationName + "(" + genre + ", " + link + ");  ";
			}
			return reply;
		}
		public static MatchCollection getAllRows() {
			string usLiveRadio = User.WebpageToString("http://www.usliveradio.com/");
			usLiveRadio = usLiveRadio.Trim().Replace('\n',' ').Replace('\t',' ').Replace('\r',' ');
			Regex regex = new Regex("<tr> <td([^<]|<[^t]|<t[^r]|<tr[^>])*</tr>", RegexOptions.IgnoreCase);
			return regex.Matches(usLiveRadio);
		}
		public static void ExtractDetails(string row, out string stationName, out string city, out string state, out string link, out string genre) {
			Regex rowRegex = new Regex(@"<tr> <td>(?<call>.*)</td> <td>(?<city>.*)</td> <td>(?<state>.*)</td> <td>.*</td> <td>(?<link>.*)</td> <td>(?<genre>.*)</td> </tr>", RegexOptions.IgnoreCase);
			Match match = rowRegex.Match(row);
			if(!match.Success)
				Console.WriteLine("Barbarian does not match: " + row);
			stationName = User.StripHTML(match.Groups["call"].Value);
			city = User.StripHTML(match.Groups["city"].Value);
			state = User.StripHTML(match.Groups["state"].Value);
			genre = User.StripHTML(match.Groups["genre"].Value);
			link = match.Groups["link"].Value;
			Regex linkRegex = new Regex("<a href=\"(?<link>[^\"]*)\"", RegexOptions.IgnoreCase);
			Match match2 = linkRegex.Match(link);
			if(!match2.Success)
				Console.WriteLine("Assassin does not match: " + link);
			link = match2.Groups["link"].Value;
		}
	}
}