using AllocsFixes.NetConnections.Servers.Web.API;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Threading;

namespace AllocsFixes.NetConnections.Servers.Web.Handlers
{
	public class ApiHandler : PathHandler {
		private string staticPart;
		private Dictionary<String, WebAPI> apis = new Dictionary<string, WebAPI> ();

		public ApiHandler (string staticPart, string moduleName = null) : base(moduleName) {
			this.staticPart = staticPart;
			addApi ("getlandclaims", new GetLandClaims ());
			addApi ("getplayersonline", new GetPlayersOnline ());
			addApi ("getplayerslocation", new GetPlayersLocation ());
			addApi ("getplayerinventory", new GetPlayerInventory ());
			addApi ("getstats", new GetStats ());
		}

		private void addApi (string _apiName, WebAPI _api) {
			apis.Add (_apiName, _api);
			WebPermissions.Instance.AddKnownModule ("webapi." + _apiName);
		}

		public override void HandleRequest (HttpListenerRequest req, HttpListenerResponse resp, WebConnection user, int permissionLevel) {
			string apiName = req.Url.AbsolutePath.Remove (0, staticPart.Length);
			if (!AuthorizeForCommand (apiName, user, permissionLevel)) {
				resp.StatusCode = (int)HttpStatusCode.Forbidden;
				if (user != null) {
					Log.Out ("ApiHandler: user '{0}' not allowed to execute '{1}'", user.SteamID, apiName);
				} else {
					Log.Out ("ApiHandler: unidentified user from '{0}' not allowed to execute '{1}'", req.RemoteEndPoint.Address, apiName);
				}
				return;
			} else {
				foreach (KeyValuePair<string, WebAPI> kvp in apis) {
					try {
						if (apiName.StartsWith (kvp.Key)) {
							kvp.Value.HandleRequest (req, resp, user, permissionLevel);
							return;
						}
					} catch (Exception e) {
						Log.Out ("Error in ApiHandler.HandleRequest(): Handler threw an exception: " + e);
						resp.StatusCode = (int)HttpStatusCode.InternalServerError;
						return;
					}
				}
			}
	
			Log.Out ("Error in ApiHandler.HandleRequest(): No handler found for API \"" + apiName + "\"");
			resp.StatusCode = (int)HttpStatusCode.NotFound;
		}

		private bool AuthorizeForCommand (string apiName, WebConnection user, int permissionLevel) {
			return WebPermissions.Instance.ModuleAllowedWithLevel ("webapi." + apiName, permissionLevel);
		}

	}

}