var JsAjaxHandler = Class.create({

	/*
	 * Parameter, die von den erbenden Klassen gesetzt werden muessen
	 */

	/* Die verfuegbaren 'actions' */
	availableActions: new Object(),

	/* Diese sollen in der Methode "initActions" gesetzt werden */
	initActions: function() {},

	/* Die Basis-URL fuer die Requests, *inklusive* ? bzw. & also z.B. "ajax.php?" oder "ajax.php?a=b&" */
	baseRequestURL: '',

	/*
	 * Initialisierung
	 */
	initialize: function() {
		/* Actions initialisieren */
		this.initActions();
	},

	/*
	 * Gibt ein XML-Http-Request-Objekt zurueck
	 */
	getXMLHttpObj: function() {

		var xmlHttp = null;
		// Mozilla, Opera, Safari sowie Internet Explorer 7
		if (typeof XMLHttpRequest != 'undefined') {
			xmlHttp = new XMLHttpRequest();
		}
		if (!xmlHttp) {
			// Internet Explorer 6 und aelter
			try {
				xmlHttp  = new ActiveXObject("Msxml2.XMLHTTP");
			} catch(e) {
				try {
					xmlHttp  = new ActiveXObject("Microsoft.XMLHTTP");
				} catch(e) {
					xmlHttp  = null;
				}
			}
		}
		if(!xmlHttp)
			return false;

		return xmlHttp;
	},

	/*
	 * Verarbeitet Antworten des Servers
	 */
	handleResponse: function(xmlHttp, Action, callbackFunction) {

		/* Der IE (Versionen 6 + 7 getestet) scheint mit manchen XML-Daten nicht zurechtzukommen.
		 * Daher gibts hier ein haessliches Workaround :) */
		if(navigator.userAgent.indexOf("MSIE") != -1) {

			var xmlRes = new ActiveXObject("Microsoft.XMLDOM");
			xmlRes.loadXML(xmlHttp.responseText);

			callbackFunction(xmlRes);

		} else
			callbackFunction(xmlHttp.responseXML);

	},

	/*
	 * Fuehrt eine der verfuegbaren 'actions' durch
	 */
	doAction: function(actionIdent, paramValues, callbackFunction) {

		/* Ueberpruefen, ob die Action existiert */
		if(!this.availableActions[actionIdent])
			return false;

		/* Aktuelle Action speichern */
		var currentAction = this.availableActions[actionIdent];

		/* Request-URL zusammenbauen */
		var url = this.baseRequestURL + "action=" + actionIdent;

		/* GET-Parameter anhaengen */
		var i;
		for(i = 0; i < currentAction["params"].length; i++) {
			var paramName = currentAction["params"][i];
			url += "&" + encodeURIComponent(paramName) + "=" + encodeURIComponent(paramValues[paramName]);
		}

		/* Eventuell POST-Parameter hinzufuegen */
		if(currentAction["post_params"].length) {

			var postParamString = "";

			for(i = 0; i < currentAction["post_params"].length; i++) {

				if(i > 0)
					postParamString += "&";

				var paramName = currentAction["post_params"][i];
				postParamString += encodeURIComponent(paramName) + "=" + encodeURIComponent(paramValues[paramName]);
			}


			method = "POST";
		} else
			method = "GET";

		/* XML-Http-Request-Objekt erstellen */
		var xmlHttp = this.getXMLHttpObj();

		/* MIME-Type erzwingen - im IE (Versionen 6 + 7 getestet) nicht moeglich */
		if(currentAction["xml_output"] && navigator.userAgent.indexOf("MSIE") == -1)
			xmlHttp.overrideMimeType("text/xml");


		/* URL laden */
		xmlHttp.open(method, url, true);

		/* Da in einer neuen function() das 'this' nicht mehr zur Verfuegung steht */
		handleResponse = this.handleResponse;

		xmlHttp.onreadystatechange = function() {
			if(xmlHttp.readyState != 4)
				return;

			handleResponse(xmlHttp, currentAction, callbackFunction);
		};

		/* Bei POST die Parameter senden */
		if(method == "POST") {
			xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
			xmlHttp.setRequestHeader("Content-length", postParamString.length);
			xmlHttp.setRequestHeader("Connection", "close");
			xmlHttp.send(postParamString);
		} else {
			xmlHttp.send(null);
		}

		return true;
	}

});

/* radio m AJAX-Klasse */
var RadioMAjaxHandler  = Class.create(JsAjaxHandler, {

	baseRequestURL: '/ajax.php?',

	initActions: function() {
this.availableActions = new Object();
this.availableActions["ManuskriptAnfordern"] = new Object();
this.availableActions["ManuskriptAnfordern"]["name"] = "ManuskriptAnfordern";
this.availableActions["ManuskriptAnfordern"]["params"] = new Array('podcast_id', 'stage', 'name', 'email', 'message', 'manuskript_captcha_id', 'manuskript_captcha');
this.availableActions["ManuskriptAnfordern"]["post_params"] = new Array();
this.availableActions["podcastEmpfehlen"] = new Object();
this.availableActions["podcastEmpfehlen"]["name"] = "podcastEmpfehlen";
this.availableActions["podcastEmpfehlen"]["params"] = new Array('recommend_id', 'stage', 'sender_name', 'sender_email', 'recipient_name', 'recipient_email');
this.availableActions["podcastEmpfehlen"]["post_params"] = new Array();
},

ManuskriptAnfordern: function(podcast_id, stage, name, email, message, manuskript_captcha_id, manuskript_captcha, callback) {
var params = new Object();
params.podcast_id = podcast_id;
params.stage = stage;
params.name = name;
params.email = email;
params.message = message;
params.manuskript_captcha_id = manuskript_captcha_id;
params.manuskript_captcha = manuskript_captcha;
return this.doAction('ManuskriptAnfordern', params, callback);
},

podcastEmpfehlen: function(recommend_id, stage, sender_name, sender_email, recipient_name, recipient_email, callback) {
var params = new Object();
params.recommend_id = recommend_id;
params.stage = stage;
params.sender_name = sender_name;
params.sender_email = sender_email;
params.recipient_name = recipient_name;
params.recipient_email = recipient_email;
return this.doAction('podcastEmpfehlen', params, callback);
},
	podcastEmpfehlenGetFormHTML: function(podcast_id, callback) {

		this.podcastEmpfehlen(podcast_id, 'request_form', '', '', '', '', function(XMLDoc) {

			var root = XMLDoc.documentElement;
			var formHTML = root.getElementsByTagName("formHTML")[0].firstChild.nodeValue;

			callback(formHTML);
		});

	},
	
	podcastEmpfehlenSend: function(podcast_id, sender_name, sender_email, recipient_name, recipient_email, callback) {

		this.podcastEmpfehlen(podcast_id, 'send', sender_name, sender_email, recipient_name, recipient_email, function(XMLDoc) {

			var root = XMLDoc.documentElement;
			var success = root.getElementsByTagName("success")[0].firstChild.nodeValue;
			var message = root.getElementsByTagName("message")[0].firstChild.nodeValue;

			callback(success, message);
		});

	},

	ManuskriptAnfordernGetFormHTML: function(podcast_id, callback) {

		this.ManuskriptAnfordern(podcast_id, 'request_form', '', '', '', '', '', function(XMLDoc) {

			var root = XMLDoc.documentElement;
			var formHTML = root.getElementsByTagName("formHTML")[0].firstChild.nodeValue;

			callback(formHTML);
		});

	},

	ManuskriptAnfordernSend: function(podcast_id, name, email, message, manuskript_captcha_id, manuskript_captcha, callback) {

		this.ManuskriptAnfordern(podcast_id, 'send', name, email, message, manuskript_captcha_id, manuskript_captcha, function(XMLDoc) {

			var root = XMLDoc.documentElement;
			var success = root.getElementsByTagName("success")[0].firstChild.nodeValue;

			var formHTML = null;
			if(!success || success == '0')
				formHTML = root.getElementsByTagName("formHTML")[0].firstChild.nodeValue;

			callback(success, formHTML);
		});

	}
});

/* Funktionen zum Erweitern/Ausfahren der Player-/Content-Box */
var PlayerboxAjaxContent = Class.create({

	/* Der Bereich, in den aller Content geladen wird */
	contentDiv: null,

	/* Ob der Bereich aktuell visible oder invisible ist */
	visible: false,

	/* Ob der Lade-Bereich aktuell angezeigt wird */
	loading: false,

	/* Welcher Content gerade geladen ist */
	contentIdent: null,

	initialize: function() {
		this.contentDiv = $('playerbox_ajax_content');
		if(!this.contentDiv)
			return;
	},
	
	/* Zeigt einen Lade-Zustand an */
	setLoading: function(inElem) {

		if(!inElem && this.loading)
			return;

		var loadingHTML = 'Lade...';

		if(inElem)
			inElem.update(loadingHTML);
		else {
			var tmp = new Element('div', { id: 'playerbox_ajax_loading' } );
			tmp.update(loadingHTML);

			this.contentDiv.parentNode.insertBefore(tmp, this.contentDiv);

			this.loading = true;
		}
	},

	/* Blendet den Lade-Zustand aus */
	setNotLoading: function(inElem) {

		if(inElem) {
			inElem.update('');
			return;
		}
		
		if(!this.loading)
			return;

		$('playerbox_ajax_loading').parentNode.removeChild($('playerbox_ajax_loading'));

		this.loading = false;
	},

	/* Content aendern */
	changeContent: function(content) {

		/* Wenn der Content-Bereich schon sichtbar ist, wird zunaechst der alte Inhalt ausgeblendet */
		if(this.visible) {
			var tmp = this.contentDiv;
			Effect.toggle('playerbox_ajax_content', 'slide', { duration: .5, afterFinish: 
				function() {
					tmp.update('<div>'+content+'<\/div>');
					Effect.toggle('playerbox_ajax_content', 'slide', { duration: 1 });
				}
			});
			return;
		}

		this.contentDiv.update('<div>'+content+'<\/div>');
		Effect.toggle('playerbox_ajax_content', 'slide', { duration: 1 });

		this.visible = true;
	},

	/* Content setzen - ohne Uebergangsanimation! */
	setContent: function(content) {
		this.contentDiv.update('<div>'+content+'<\/div>');
	},

	/* Content-Bereich ausblenden */
	hide: function() {

		if(!this.visible)
			return;

		window.clearTimeout(this.hideTimeout);

		var tmp = this;
		Effect.toggle('playerbox_ajax_content', 'slide', { duration: 1, afterFinish: 
			function() {
				tmp.visible = false;
			}
		});
	},

	/* Content-Bereich nach time ms wieder ausblenden */
	hideIn: function(time) {
		/* FIXME: Haesslich, da this hier nicht verfuegbar ist */
		this.hideTimeout = window.setTimeout('playerboxAjaxContentHandler.hide()', time);
	}

});

/* Funktion zum Podcast-Empfehlen */
function podcastEmpfehlenStart(podcast_id)
{
	/* Wenn schon geladen, ausblenden */
	if(playerboxAjaxContentHandler.contentIdent == 'podcastEmpfehlen' && playerboxAjaxContentHandler.visible) {
		playerboxAjaxContentHandler.hide();
		return;
	}

	/* Ident setzen */
	playerboxAjaxContentHandler.contentIdent = 'podcastEmpfehlen';

	/* Lade-Bereich anzeigen */
	playerboxAjaxContentHandler.setLoading();

	var handle = new RadioMAjaxHandler;
	handle.podcastEmpfehlenGetFormHTML(podcast_id, function(formHTML) {

		/* Formular anzeigen */
		playerboxAjaxContentHandler.changeContent(formHTML);

		/* Lade-Bereich ausblenden */
		playerboxAjaxContentHandler.setNotLoading();
	});
}
function podcastEmpfehlenSubmit(podcast_id, form)
{
	/* Submit-Button ausblenden */
	$(form.submit_button).hide();

	/* Eventuelle alte Fehler ausblenden */
	$('recommend_podcast_error').update('');

	var handle = new RadioMAjaxHandler;
	handle.podcastEmpfehlenSend(podcast_id, $F(form.sender_name), $F(form.sender_email), $F(form.recipient_name), $F(form.recipient_email), function(success, message) {

		if(success == '0') {

			/* Fehlermeldung ausgeben */
			$('recommend_podcast_error').update(message);

			/* Submit-Button wieder anzeigen */
			form.submit_button.show();

		} else {
			/* Erfolgsmeldung ausgeben */
			playerboxAjaxContentHandler.setContent(message);
			playerboxAjaxContentHandler.hideIn(2000);
		}

	});
}

/* Funktionen zum Manuskript-Anfordern */
function ManuskriptAnfordernStart(podcast_id)
{
	/* Wenn schon geladen, ausblenden */
	if(playerboxAjaxContentHandler.contentIdent == 'ManuskriptAnfordern' && playerboxAjaxContentHandler.visible) {
		playerboxAjaxContentHandler.hide();
		return;
	}

	/* Ident setzen */
	playerboxAjaxContentHandler.contentIdent = 'ManuskriptAnfordern';

	/* Lade-Bereich anzeigen */
	playerboxAjaxContentHandler.setLoading();

	var handle = new RadioMAjaxHandler;
	handle.ManuskriptAnfordernGetFormHTML(podcast_id, function(formHTML) {

		/* Formular anzeigen */
		playerboxAjaxContentHandler.changeContent(formHTML);

		/* Lade-Bereich ausblenden */
		playerboxAjaxContentHandler.setNotLoading();

	});
}
function ManuskriptAnfordernSubmit(podcast_id, form)
{
	/* Submit-Button ausblenden */
	$(form.submit_button).hide();

	/* Eventuelle alte Fehler ausblenden */
	$('manuskript_anfordern_error').update('');

	var handle = new RadioMAjaxHandler;
	handle.ManuskriptAnfordernSend(podcast_id, $F(form.name), $F(form.email), $F(form.message), $F(form.manuskript_captcha_id), $F(form.manuskript_captcha), function(success, formHTML) {

		if(success == '0') {

			playerboxAjaxContentHandler.setContent(formHTML);

			/* Fehlermeldung ausgeben */
			//$('manuskript_anfordern_error').update(message);

			/* Submit-Button wieder anzeigen */
			//form.submit_button.show();

		} else {
			/* Erfolgsmeldung ausgeben */
			playerboxAjaxContentHandler.setContent('<p><b>Ihre Anfrage wurde erfolgreich versandt. Sie erhalten in Kürze eine Rückmeldung von uns!</b></p>');
			playerboxAjaxContentHandler.hideIn(2000);
		}

	});

}

/* Initialisieren */
var playerboxAjaxContentHandler = null;
Event.observe(window, 'load', function() {
	playerboxAjaxContentHandler = new PlayerboxAjaxContent;
});