using System;
using System.Collections.Generic;

namespace ConsoleApp {
	class MainClass {
		private static Dictionary<string, Command> CommandLookup;

		private static void SetupCommands() {
			CommandLookup = new Dictionary<string, Command>();

			CommandLookup.Add("init", new InitCommand());
			CommandLookup.Add("list", new ListCommand());
			CommandLookup.Add("import-obj", new ImportObjCommand());
			CommandLookup.Add("export-obj", new ExportObjCommand());
			CommandLookup.Add("export-collada", new ExportColladaCommand());
			CommandLookup.Add("export-textures", new ExportTexturesCommand());
		}

		public static void Main(string[] args) {
			Console.WriteLine("NW4RTools by Treeki");
			Console.WriteLine();

			SetupCommands();

			// process the command line
			string cmd;
			string[] cmdArgs;

			if (args.Length == 0) {
				cmd = "help";
				cmdArgs = new string[0];
			} else {
				cmd = args[0];
				cmdArgs = new string[args.Length - 1];

				for (int i = 1; i < args.Length; i++) {
					cmdArgs[i - 1] = args[i];
				}
			}

			// handle Help if needed
			if (cmd == "help") {
				Help(cmdArgs);
				return;
			}

			// otherwise, pass it on
			if (CommandLookup.ContainsKey(cmd)) {
				CommandLookup[cmd].Execute(cmdArgs);
			} else {
				Console.WriteLine("Unknown command {0}. Try \"help\" for a list of usable commands", cmd);
			}
		}

		private static void Help(string[] args) {
			if (args.Length == 0) {
				Console.WriteLine("Available commands:");

				foreach (var cmd in CommandLookup) {
					Console.WriteLine("- {0}: {1}", cmd.Key, cmd.Value.Description);
				}

				Console.WriteLine();
				Console.WriteLine("For additional info, try: help <command-name>");

			} else {
				if (CommandLookup.ContainsKey(args[0])) {
					Console.WriteLine("Help for {0}:", args[0]);
					string[] helpArgs = new string[args.Length - 1];

					for (int i = 1; i < args.Length; i++) {
						helpArgs[i - 1] = args[i];
					}

					Console.WriteLine(CommandLookup[args[0]].GetHelp(helpArgs));

				} else {
					Console.WriteLine("Unknown command {0}. Try \"help\" for a list of usable commands", args[0]);
				}
			}
		}
	}
}