var url = require('url'),
http = require('http'),
mime = require('mime-types'),
fs = require('fs');
module.exports = class WebserverController {
	handleRequest(config, request, response) {
		switch(request.method.toLowerCase()) {
			case "post":
			this.handlePostRequest(config, request, response);
			break;
			case "get":
			default:
			this.handleGetRequest(config, request, response);
			break;
		}
	}

	handlePostRequest(config, request, response) {
		var body = '';
		var self = this;
	    request.on('data', function(chunk) {
	        body += chunk.toString();
	    });
	    request.on('end', function() {
	    	var keyValuePairs = body.split("&");
	    	var postData = {};
	    	for(var i in keyValuePairs) {
	    		var block = keyValuePairs[i].split("=");
	    		postData[block[0]] = block[1];
	    	}
	    	self.handleRoutes(config, request, response, postData);
	    });
	}

	handleRoutes(config, request, response, body) {
		var parsedUrl = url.parse(request.url, true);
		var pathname = parsedUrl.pathname;
		var pathParts = pathname.replace(/^\/+/gm, '').split("/");
		if(pathParts[0] == "api") {
			pathParts.shift(); //drop api
			var responseData = null;
			switch(pathParts.shift()) {
				case "current":
					this.current(config, request, response);
				break;
				case "register":
					this.register(config, request, response, body);
				break;
				default:
					this.help(request, response);
				break;
			}
			return;
		}

		var filename = config.websitePath;
		if(config.routes.hasOwnProperty(pathname)) {
			filename += config.routes[pathname];
		} else {
			filename += pathname;
		}

		fs.stat(filename, function(err, stat) {
			if(err != null) {
				if(err.code == 'ENOENT') {
					response.writeHead(404, {'Content-Type': 'text/html'});
					response.write("404 Page Not Found");
				} else {
					response.writeHead(500, {'Content-Type': 'text/html'});
					response.write("500 Server Error");
				}
				response.end();
				return;
			}

			fs.readFile(filename, function(err, data) {
				var mimeType = mime.lookup(filename);
				response.writeHead(200, {'Content-Type': mimeType});
				response.write(data);
				response.end();
			});
		});
		
	}

	handleGetRequest(config, request, response) {
		this.handleRoutes(config, request, response, {});
	}

	current(config, request, response) {
		var responseData = {};
		var activePlayers = [];
		for(var i in session.players) {
			var player = session.players[i];
			activePlayers.push(player.name);
		}
		responseData.players = activePlayers;
		response.writeHead(200, {'Content-Type': 'application/json'});
		response.write(JSON.stringify(responseData, null, '\t'));
		response.end();
	}

	register(config, request, response, body) {
		if(!config.allowRegistration) {
			response.writeHead(200, {'Content-Type': 'application/json'});
			response.write(JSON.stringify({"status": "error", "error": "Registration is not enabled at this time."}, null, '\t'));
			response.end();
			return;
		}
		//TODO: make sure username is valid and not already claimed
		if(!this.isValidUsername(config, body.username)) {
			response.writeHead(200, {'Content-Type': 'application/json'});
			response.write(JSON.stringify({"status": "error", "error": "That username is not available."}, null, '\t'));
			response.end();
			return;
		}
		var newPlayer = builder.mud_spawnMobile("PlayerMobile");

		newPlayer.password = world.mud_generateHash(body.username.toLowerCase() + body.password);

		var	playerName = JSON.stringify(body.username).replace( /[_\W]/g , '');
		playerName = playerName.substring(0,1).toUpperCase() + playerName.substring(1);
		newPlayer.name = playerName;

		world.mud_playerSave(newPlayer);
		world.mud_destroyMobile(newPlayer.id);

		response.writeHead(200, {'Content-Type': 'application/json'});
		response.write(JSON.stringify({"status": "ok"}, null, '\t'));
		response.end();
	}

	isValidUsername(config, username) {
		var	cleanName = JSON.stringify(username).replace( /[_\W]/g , '');
		if(config.usernameBlacklist.indexOf(cleanName) != -1) {
			return false;
		}

		var playerFilename = config.playerDataPath+ "/"+cleanName+".json";
		if (fs.existsSync(playerFilename)) {
 		   return false;
		}
		return cleanName == username;
	}

	help(request, response) {
		var helpData = {"description": "This is the API for accessing or writing data to the Starmire MUD.",
		"commands" : [
			{"path": "/api/current", "method": "get", "description": "Returns the current players"},
			{"path": "/api/register", "method": "post", "fields": "username, password", "description": "Will create a new character with the username and password specified if valid."},
		]};
		response.writeHead(200, {'Content-Type': 'application/json'});
		response.write(JSON.stringify(helpData, null, '\t'));
		response.end();
	}
};