/**
 * KongregateFlashAPI.hx - A Haxe implementation of Kongregate's Client API.
 * 
 * Copyright 2014 Joseph Cloutier
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *    http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import flash.display.Loader;
import flash.display.Stage;
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.events.IOErrorEvent;
import flash.Lib;
import flash.net.URLRequest;
import flash.Vector;

/**
 * @usage
 * var api:KongregateFlashAPI = new KongregateFlashAPI();
 * api.submit("myStatName", myStatValue);
 * 
 * @usage
 * var api = new KongregateFlashAPI();
 * api.addEventListener(KongregateFlashAPI.EVENT_LOAD_COMPLETE, function(e) { api.showRegistrationBox(); } );
 * api.addEventListener(KongregateFlashAPI.EVENT_LOGIN, myLoginCallback);
 */
class KongregateFlashAPI extends EventDispatcher {
	public static var EVENT_LOAD_COMPLETE:String = Event.COMPLETE;
	public static var EVENT_IO_ERROR:String = IOErrorEvent.IO_ERROR;
	public static inline var EVENT_LOGIN:String = "login";
	
	public var kongregate(default, null):Dynamic;
	
	private var loader:Loader;
	private var statsBacklog:Vector< {name:String, value:Int} >;
	
	public function new() {
		super();
		
		statsBacklog = new Vector< {name:String, value:Int} >();
		
		var stage:Stage = Lib.current.stage;
		var apiUrl:String = stage.loaderInfo.parameters.kongregate_api_path;
		
		//Note: the shadow API does work, but the folder containing your
		//.swf file has to be marked as a "Trusted location." For more
		//information, refer to this ridiculously long url:
		//http://help.adobe.com/en_US/FlashPlayer/LSM/WS6aa5ec234ff3f285139dc56112e3786b68c-7ff0.html
		
		//Also, rather than printing to the screen, it prints to Flash's
		//log file, which is documented here:
		//http://help.adobe.com/en_US/flex/using/WSda78ed3a750d6b8f-4867184d1239f9d0558-8000.html
		if(apiUrl == null) {
			apiUrl = "http://www.kongregate.com/flash/API_AS3_Local.swf";
		}
		
		var urlRequest:URLRequest = new URLRequest(apiUrl);
		
		loader = new Loader();
		loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoadComplete);
		loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, onLoadError);
		loader.load(urlRequest);
		
		stage.addChild(loader);
	}
	
	private function onLoadError(e:IOErrorEvent):Void {
		Lib.current.stage.removeChild(loader);
		loader = null;
		
		dispatchEvent(e);
	}
	
	private function onLoadComplete(e:Event):Void {
		Lib.current.stage.removeChild(loader);
		loader = null;
		
		kongregate = e.target.content;
		kongregate.services.connect();
		
		kongregate.services.addEventListener(EVENT_LOGIN, onLogin);
		
		for(stat in statsBacklog) {
			kongregate.stats.submit(stat.name, stat.value);
		}
		
		dispatchEvent(e);
	}
	
	public function isReady():Bool {
		return kongregate != null;
	}
	
	public function submit(name:String, value:Int):Void {
		if(kongregate != null) {
			kongregate.stats.submit(name, value);
		} else if(statsBacklog != null) {
			statsBacklog.push( {name:name, value:value} );
		}
	}
	
	private function onLogin(e:Event):Void {
		dispatchEvent(e);
	}
	
	public function showRegistrationBox():Void {
		if(kongregate != null && isGuest()) {
			if(Reflect.hasField(kongregate.services, "showRegistrationBox")) {
				kongregate.services.showRegistrationBox();
			} else {
				//Just pretend that this exists in the shadow API, ok?
				Lib.trace("Kongregate API: IKongregateServices.showRegistrationBox()");
			}
		}
	}
	
	public function getUsername():String {
		if(kongregate != null) {
			return kongregate.services.getUsername();
		} else {
			return "Guest";
		}
	}
	
	public function isGuest():Bool {
		if(kongregate != null) {
			return kongregate.services.isGuest();
		}
		
		return true;
	}
}