/**
 * @author daniel.smith
 */

var stateCallback = function() {
    return {
        success: function(o) {
            if(o.responseText !== undefined){
                addNewOptions(o.argument.stateSelectElm, o.responseXML);

                /*
                 * Locate hidden field that may contain return index of previously selected state option
                 * Until app dev has this portion covered, hardcode index value for testing
                 *
                 * When complete, replace var prevValue = 'state'; with var prevValue = null;
                 *
                 */

                var prevValue = null;        // SHOULD BE CA, NY, etc.

                /* Locate hidden value for previously-selected state: app uses multiple variations */
                var hiddenInput = o.argument.stateSelectElm.form['selProv'];
                if (typeof hiddenInput == 'undefined') {
                    hiddenInput = o.argument.stateSelectElm.form['_D:states'];
                }
                if (typeof hiddenInput == 'undefined') {
                    hiddenInput = o.argument.stateSelectElm.form['_D:/atg/userprofiling/ProfileFormHandler.editValue.state'];
                }
                if (typeof hiddenInput == 'undefined') {
                    hiddenInput = o.argument.stateSelectElm.form['_D:provinceb'];
                }

                if (typeof hiddenInput != 'undefined' && hiddenInput.value && hiddenInput.value !== '' && hiddenInput.value !== ' ') {
                    prevValue = hiddenInput.value;
                }

                /* use hiden value to update select list */
                if (prevValue !== null) {
                    var options = o.responseXML.getElementsByTagName('option');
                    if (options.length > 1) {
                        for (var i = 1; i < options.length; i++) {
                            if (options[i].getAttribute('value') == prevValue) {
                                o.argument.stateSelectElm.selectedIndex = i;
                                break;
                            }
                        }
                    }
                } else {
                    o.argument.stateSelectElm.options[0].text = (typeof defaultSelectMessage != 'undefined' && defaultSelectMessage !== null && defaultSelectMessage !== '') ? defaultSelectMessage : "- Select -";
                }
            }
        },
        failure: function(o) { /* do nothing */ },
        argument: { stateSelectElm: "blank" },
        timeout: 5000
    };
};

function addNewOptions(selectElm, optionXml)
{
    selectElm.options.length = 0;
    var opts = optionXml.getElementsByTagName('option');
    for (var i=0;i<opts.length;i++) {
        selectElm.options[i] = new Option(opts[i].firstChild.nodeValue,opts[i].getAttribute('value'));
    }
}

function getStatePicker(countrySelectElm) {
    if (!countrySelectElm) { return; }
    var ancestorElm = countrySelectElm.parentNode.parentNode.parentNode;
    var stateDD = $D.getElementsByClassName('statePicker');
    if (stateDD.length) {
        for(var j = 0; j < stateDD.length; j++){
            if (stateDD[j].parentNode.parentNode.parentNode == ancestorElm) {
                return stateDD[j];
            }
        }
    }
    return null;
}

function onCountryChange(e) {
    var url = getAjaxJspForFeedback() +"?country=" + escape(this.value);
    var statePickerElm = getStatePicker(this);
    var SCB = new stateCallback();
    SCB.argument.stateSelectElm = statePickerElm;

    if (statePickerElm.options) {
        statePickerElm.options.length = 0;
        statePickerElm.options[0] = new Option("- Please wait ... ", "");
    }
    YAHOO.util.Connect.asyncRequest('GET', url, SCB, null);
}


function initCountryEvents() {
    var countryDD = $D.getElementsByClassName('countryPicker');
    if (countryDD.length) {
        for (var i=0; i<countryDD.length; i++) {
            var CDD = countryDD[i];
            $E.addListener(CDD, "change", onCountryChange);
            var statePickerElm = getStatePicker(CDD);
            if (statePickerElm.options.length == 1 && statePickerElm.options[0].value === "") {

                if (CDD.selectedIndex > 0) {
                    var url = getAjaxJspForFeedback() +"?country=" + escape(CDD.value);
                    var SCB = new stateCallback();
                    SCB.argument.stateSelectElm = statePickerElm;
                    if (statePickerElm.options) {
                        statePickerElm.options.length = 0;
                        statePickerElm.options[0] = new Option("- Please wait ... ", "");
                    }
                    YAHOO.util.Connect.asyncRequest('GET', url, SCB, null);
                }
            }
        }
    }
}

//run the init function
YAHOO.util.Event.addListener(window, "load", function(e) {initCountryEvents();});