/**
 * Nette Framework
 *
 * Copyright (c) 2004, 2009 David Grudl (http://davidgrudl.com)
 *
 * This source file is subject to the "Nette license" that is bundled
 * with this package in the file license.txt.
 *
 * For more information please see http://nettephp.com
 *
 * @version    $Id: nette.js 182 2008-12-31 00:28:33Z david@grudl.com $
 */

var nette = {

	// public
	lastError: null,
    
    tokens: new Array(),

	spinnerId: "spinner",

	debug: false,

	result: {},

	action: function(action, sender)
	{
		this.result = {};

		// create new AJAX request
		this.initAjax();
		if (!this.ajax) return false;

		action += (action.indexOf('?') == -1) ? '?' : '&';
		if (typeof(this.state) === 'object') {
			//action += this.buildQuery(this.state, '', '');
		}

		// create process indicator
		try {
			var img = document.getElementById(this.spinnerId);
			if (sender && img) {                
				this.spinner = img.cloneNode(true);
				this.spinner.style.display = 'inline';
				sender.parentNode.insertBefore(this.spinner, sender.nextSibling);
			}
		} catch (e) {
		}
        
        r = Math.random();            
        p = parseUri(action);
        a = MD5(p['path']+'|'+p['queryKey']['do']);
		try {

            this.tokens[a] = r;
			var url = action + '-r=' + r + '&-a=' + a;
			var query = '';

			this.ajax.open("POST", url, true);
			this.ajax.setRequestHeader("X-Requested-With", "XMLHttpRequest");
            //this.ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
            //this.ajax.setRequestHeader("Content-Length", "0");
			this.ajax.onreadystatechange = function() { nette.ajaxHandler(); }
			this.ajax.send(query);
			return true;

		} catch (e) {
			return false;
		}
	},

    formAction: function(form, event)
    {

            this.result = {};

            // create new AJAX request
            this.initAjax();
            if (!this.ajax) return false;

            var sender = document.activeElement || event.explicitOriginalTarget;
            var action = form.action;

            action += (action.indexOf('?') == -1) ? '?' : '&';
            if (typeof(this.state) === 'object') {
                    action += this.buildQuery(this.state, '', '');
            }

            // create process indicator
            try {
                    var img = document.getElementById(this.spinnerId);
                    if (sender && img) {
                            this.spinner = img.cloneNode(true);
                            this.spinner.style.display = 'inline';
                            sender.parentNode.insertBefore(this.spinner, sender.nextSibling);
                    }
            } catch (e) {
            }

            try {                       
                    var url = action + '-r=' + Math.random();
                    var query = this.buildFormQuery(form, sender);
                    this.ajax.open("POST", url, true);
                    this.ajax.setRequestHeader("X-Requested-With", "XMLHttpRequest");
                    this.ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
                    this.ajax.onreadystatechange = function() { nette.ajaxHandler(); }
                    this.ajax.send(query);
                    return true;

            } catch (e) {
                    return false;
            }
    },


	onSuccess: function()
	{
        
        if(this.result._a != null && this.tokens[this.result._a] != this.result._r) return;
        
		if (this.result.error) {
			this.onError(this.result.error.message);
			return;
		}

		if (this.result.redirect) {
			var url = this.result.redirect;
			if (this.debug) {
				alert(url);
			}
			document.location = url;
			return;
		}

		if (this.result.state) {
			this.state = this.result.state;
		}
        
        if (this.result.eval) {
            for (var id in this.result.eval) {
                eval(this.result.eval[id]);
            }            
        }

		if (this.result.events) {
			for (var id in this.result.events) {
				this.handleEvent(this.result.events[id]);
			}
		}

		if (this.result.snippets) {
			for (var id in this.result.snippets) {
				this.updateSnippet(id, this.result.snippets[id]);
			}
		}        
		this.result = {};
	},


	onError: function(message)
	{
		this.lastError = message;

		if (this.debug) {
			alert(message);
		}
	},   

    
	updateSnippet: function(id, html)
	{
		var el = document.getElementById(id);
		if (el) el.innerHTML = html.replace(/<script(.|\s)*?\/script>/g, "");
        setTimeout(function() {js_evalScripts(html)}, 10);
	},

	handleEvent: function(args)
	{
		if (this.debug) {
			//alert(event + '(' + args + ')');
		}
		var event = args.shift();
		var obj = event.split('.');
		obj.pop();
		obj = obj.join('.');
		eval(event + '.apply(' + obj + ', args);');
	},


	// private
	state: null,

	spinner: null,

	ajax: null,


	initAjax: function()
	{
		this.ajax = false;

		if (typeof XMLHttpRequest !== 'undefined') {
			this.ajax = new XMLHttpRequest();
		}

		if (!this.ajax && window.ActiveXObject) {
			try {
				this.ajax = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try {
					this.ajax = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e) {
					this.ajax = false;
				}
			}
		}
	},


	ajaxHandler: function()
	{
		if (this.ajax.readyState == 4) {
			// remove process indicator
			if (this.spinner) {
				this.spinner.parentNode.removeChild(this.spinner);
				this.spinner = null;
			}

			if (this.ajax.status === 200) {
				eval('this.result = ' + this.ajax.responseText);
				this.onSuccess();

			} else  {
				this.onError(this.ajax.status + " " + this.ajax.statusText + "\n\n" + this.ajax.responseText);
			}

			this.ajax = false;
		}
	},


	buildQuery: function(data, prefix, postfix)
	{
		var s = '';
		for (var key in data) {
			if (typeof(data[key]) === 'object') {
				s += this.buildQuery(data[key], prefix + encodeURIComponent(key) + postfix + '%5B', '%5D');
			} else {
				if (data[key] === true || data[key] === false) {
					data[key] = data[key] ? '1' : '0';
				}
				s += prefix + encodeURIComponent(key) + postfix + '=' + encodeURIComponent((data[key].toString())) + '&';
			}
		}
		return s.replace(/%20/g, '+');
	},
    
    buildFormQuery: function(form, sender)
    {
            
            var s = '';
            var amp = '';            
            for (var i=0; i < form.elements.length; i++) {
                    
                    switch (form.elements[i].tagName) {
                            case 'INPUT':
                                    switch (form.elements[i].type) {
                                            case 'text':
                                            case 'password':
                                            case 'hidden':
                                                    s += amp + encodeURIComponent(form.elements[i].name) +
                                                            "=" + encodeURIComponent(form.elements[i].value);
                                                    break;

                                            case 'checkbox':
                                            case 'radio':
                                                    if (form.elements[i].checked)
                                                            s += amp + encodeURIComponent(form.elements[i].name) +
                                                                    "=" + encodeURIComponent(form.elements[i].value);
                                                    break;
                                    }
                                    break;

                            case 'TEXTAREA':
                                    s += amp + encodeURIComponent(form.elements[i].name) +
                                            "=" + encodeURIComponent(form.elements[i].value);
                                    break;

                            case 'SELECT':
                                    s += amp + encodeURIComponent(form.elements[i].name) +
                                            "=" + encodeURIComponent(form.elements[i].options[form.elements[i].selectedIndex].value);
                                    break;
                    }
                    amp = '&';
            }
            if (sender != null) {
                    s += '&' + encodeURIComponent(sender.name) + '=' + encodeURIComponent(sender.value);
            }
            return s.replace(/%20/g, '+');
    }
}

var js_ScriptFragment = '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)';


function js_extractScripts(str)
{
    var matchAll = new RegExp(js_ScriptFragment, 'img');
    var matchOne = new RegExp(js_ScriptFragment, 'im');

    var arr = str.match(matchAll) || [];
    var res = [];

    for (var i = 0; i < arr.length; i++) res.push((arr[i].match(matchOne) || ['', ''])[1]);
    return res;
}

function js_evalScripts(str)
{
    var arr = js_extractScripts(str);
    for (var i = 0; i < arr.length; i++) eval(arr[i]);
}

$("a.ajax").live("click", function (event) {
    event.preventDefault();
    return !nette.action(this.href, this);    
});