/*jslint onevar: false, browser: true, evil: true, laxbreak: true, undef: true, nomen: true, eqeqeq: true, bitwise: true, maxerr: 1000, immed: false, white: false, plusplus: false, regexp: false, undef: false */
/*global jetpack */
// Released under the MIT/X11 license
// http://www.opensource.org/licenses/mit-license.php
"use strict";

/* Offline supporting functions */
/**
 *
 * @todo TODO this probably makes a closure and a memory leak name='changeform'
 *       investigate
 *       https://developer.mozilla.org/en/How_to_Turn_Off_Form_Autocompletion
 *
 * <form method="post" action="process_bug.cgi" autocomplete="off">
 *
 * Reading
 * http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#h-17.13
 * random notes: - 17.13.3 provides all steps necessary - enctype !=
 * application/x-www-form-urlencoded => SHOULD fails (no further questions
 * needed) - http://www.w3.org/MarkUp/html-spec/html-spec_8.html#SEC8.2.1. is
 * nice explanation (albeit quite dated) - on multiple values
 * http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#h-17.6.1 -
 * příliš jednoduché
 * http://www.innovation.ch/java/HTTPClient/emulating_forms.html -
 */
RHBugzillaPage.prototype.serializeForm = function(form) {
    var serialForm = {
        dataOut : "",
        name : form.name,
        method : form.method,
        acceptCharset : form.acceptCharset,
        action : form.action, // TODO shouldn't we get a non-relative URL?
        enctype : form.enctype,
        cookie : this.doc.cookie,
        autocomplete : form.getAttribute("autocomplete"),
        bugNo : this.bugNo
    };

    function genURIElement(sName, sValue) {
        return encodeURIComponent(sName) + "=" + encodeURIComponent(sValue);
    }

    /**
     * @param o
     *            control to be serialized
     * @return String with the serialized control
     */
    function serializeControl(element) {
        var val = element.value;
        /*
         * on HTMLSelectElement we have an attribute 'type' of type DOMString,
         * readonly The type of this form control. This is the string
         * "select-multiple" when the multiple attribute is true and the string
         * "select-one" when false.
         */
        if ((val == null) || (val == undefined) || (val == "")) {
            return;
        } else if (val instanceof Array) {
            return val.map(function(x) {
                return genURIElement(element.name, x.value);
            }).join("&");
        } else if (val instanceof String) {
            return genURIElement(element.name, val);
        } else { // assume HTMLCollection
            return Array.map(val, function(x) {
                return genURIElement(element.name, x.value);
            }).join("&");
        }
    }

    serialForm.dataOut = Array.filter(form.elements,function(el) {
        return !el.disabled && el.name &&
            // TODO shouldn't I just add && el.value here?
            (el.checked || /select|textarea/i.test(el.nodeName) ||
                /text|hidden|password|search/i.test(el.type));
                    }).map(serializeControl).join("&");
    return serialForm;
};

//RHBugzillaPage.prototype.submitCallback = function(evt) {
//    if (jetpack.__parent__.navigator.onLine) {
//        var serForm = this
//                .serializeForm(jetpack.tabs.focused.contentWindow.document.forms
//                        .namedItem("changeform"));
//    } else {
//        var serForm = this
//                .serializeForm(jetpack.tabs.focused.contentWindow.document.forms
//                        .namedItem("changeform"));
//        myStorage.forms[this.bugNo] = serForm;
//        evt.stopPropagation();
//        evt.preventDefault();
//    }
//};

/**
 *
 *
 * Yes, this is correct, this is NOT method of RHBugzillaPage!
 */
/*function onlineCallback() {
    function deserializeAndSend(formData) {
        // TODO notImplemented
        // is it enough to just
        // run XMLHttpRequest? Probably yes, this is just a form
        // and this is just a HTTP request
        // it is probably better to get already processed
        // application/x-www-form-urlencoded
        // see http://htmlhelp.com/reference/html40/forms/form.html for details
        // and also https://developer.mozilla.org/en/AJAX/Getting_Started
        // what's?
        // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference\
        // /Global_Functions/encodeURI & co.
        // this seems to be also interesting
        // https://developer.mozilla.org/en/Code_snippets/Post_data_to_window
        console.error("Sending bugs not implemented yet!");
        return ""; // TODO check other HTTP headers to be set

        var bugID = formData.bugNo;
        var req = new XMLHttpRequest();
        req.open("POST", formData.action, true);
        // TODO co očekávám za odpověď? req.overrideMimeType("text/xml");
        // * Accept-Encoding
        // * Accept-Language
        // * Accept (MIME types)
        req.setRequestHeader("Connection", "keep-alive");
        req.setRequestHeader("Keep-Alive", 300);
        req.setRequestHeader("Content-Type", formData.enctype);
        req.setRequestHeader("Referer", bugURL + bugID);
        req.setRequestHeader("Accept-Charset", formData.acceptCharset);
        req.setRequestHeader("Cookie", formData.cookie);
        req.onreadystatechange = function(aEvt) {
            if (req.readyState == 4) {
                if (req.status == 200) {
                    delete myStorage.forms[bugID];
                } else {
                    console.error("Sending form for bug " + bugID + "failed!");
                }
            }
        };
        req.send(formData.data);
    }

    if (myStorage.forms.length > 0) {
        myStorage.forms.forEach(function(x) {
            deserializeAndSend(x);
        });
    }
}
*/