var datePickerOption_AviationAlerts = {
            showAnim: 'fadeIn', 
            duration: 'fast', 
            dateFormat: 'dd-M-yy', 
            maxDate: new Date(), 
            hideIfNoPrevNext: true, 
            changeMonth: true,
            changeYear: true
    }
    
function onRegionChange(expToken_AviationAlerts, defaultSubregion) {
    var region = $("#regionPicker" + expToken_AviationAlerts).val();
    
    if(region.toLowerCase() != "all"){
        getSubregions($("#regionPicker" + expToken_AviationAlerts).val(), defaultSubregion, true, expToken_AviationAlerts);
    }

    $("#regionPicker" + expToken_AviationAlerts + " option[value='Select']").remove();

    if ($("#rangePicker" + expToken_AviationAlerts + " option").size() == 0){
        $("#rangePicker" + expToken_AviationAlerts).append("<option value=\"all\" >All Dates</option>").
        append("<option value=\"7 days\" >Last 7 Days</option>").
        append("<option value=\"14 days\" >Last 14 Days</option>").        
        append("<option value=\"30 days\" >Last 30 Days</option>").
        append("<option value=\"specify\" >Specify Date Range...</option>"); 
    }
    
    if($("#regionPicker" + expToken_AviationAlerts).val().toLowerCase() == "all"){
        $("#subregionPicker" + expToken_AviationAlerts).empty(); 
        $("#subregionPicker" + expToken_AviationAlerts).append("<option value=\"all\" >All...</option>");
        $("#subregionPicker" + expToken_AviationAlerts).attr("disabled", "disabled");
    }else{
        $("subregionPicker" + expToken_AviationAlerts).attr("disabled", "");
    }
    
}

function initChartChangeNoticesForm(expToken_AviationAlerts){

    //When region is selected, get subregions, section, and types
    $("#regionPicker" + expToken_AviationAlerts).change(function () {
        onRegionChange(expToken_AviationAlerts, "");
        document.getElementById("subregionPicker" + expToken_AviationAlerts).index = 0;
        refreshSectionsAndTypes($("#regionPicker" + expToken_AviationAlerts).val(),"",$("#fromDatePicker" + expToken_AviationAlerts).val(),$("#toDatePicker" + expToken_AviationAlerts).val(),$("#sectionPicker" + expToken_AviationAlerts).val(),$("#rangePicker" + expToken_AviationAlerts).val(),expToken_AviationAlerts);
    });

    //On date range change, call onDateRangeChange().
    //Get alert sections and types, and their counts.
    $("#rangePicker" + expToken_AviationAlerts).change(function () {
        onDateRangeChange(expToken_AviationAlerts);
        refreshSectionsAndTypes($("#regionPicker" + expToken_AviationAlerts).val(),$("#subregionPicker" + expToken_AviationAlerts).val(),$("#fromDatePicker" + expToken_AviationAlerts).val(),$("#toDatePicker" + expToken_AviationAlerts).val(),$("#sectionPicker" + expToken_AviationAlerts).val(),$("#rangePicker" + expToken_AviationAlerts).val(),expToken_AviationAlerts);
    });

    //Make from and to date text controls into jquery calendars.
    $("#fromDatePicker" + expToken_AviationAlerts).datepicker(datePickerOption_AviationAlerts);
    $("#toDatePicker" + expToken_AviationAlerts).datepicker(datePickerOption_AviationAlerts);

    //From date can't be bigger then to date.
    //When from date changed, get alert sections and types, and their counts.
    $("#fromDatePicker" + expToken_AviationAlerts).change(function () {
        refreshSectionsAndTypes($("#regionPicker" + expToken_AviationAlerts).val(),$("#subregionPicker" + expToken_AviationAlerts).val(),$("#fromDatePicker" + expToken_AviationAlerts).val(),$("#toDatePicker" + expToken_AviationAlerts).val(),$("#sectionPicker" + expToken_AviationAlerts).val(),$("#rangePicker" + expToken_AviationAlerts).val(),expToken_AviationAlerts);
    });
    
    //To date can't be smaller the from date.
    //When to date changed, get alert sections and types, and their counts.
    $("#toDatePicker" + expToken_AviationAlerts).change(function () {
        //Only update the counts if the from date is populated...
        var fd = $("#fromDatePicker" + expToken_AviationAlerts).val();
        if (fd != null && fd != "") {
            refreshSectionsAndTypes($("#regionPicker" + expToken_AviationAlerts).val(),$("#subregionPicker" + expToken_AviationAlerts).val(),$("#fromDatePicker" + expToken_AviationAlerts).val(),$("#toDatePicker" + expToken_AviationAlerts).val(),$("#sectionPicker" + expToken_AviationAlerts).val(),$("#rangePicker" + expToken_AviationAlerts).val(),expToken_AviationAlerts);
        }
    });
}

function getSubregions(value, defaultSubregion, async, expToken_AviationAlerts) {
    
    value=encodeURIComponent(value);
    
    var form = $("#EWPTTChartChangeNoticesForm" + expToken_AviationAlerts);
    var params = "getSubregions&region=" + value;
    if (expToken_AviationAlerts == "EXP") {
        params += "&expanded=1";
    }
    showPageLoadingMsg($("#Interstitial_Container"+expToken_AviationAlerts),true, 1);
    
    $.ajax({
        url: form.attr("action"),
        data: params,
        async: async,
        success: function (xml) {
            $("#subRegionResults" + expToken_AviationAlerts).html(xml);
            if (defaultSubregion != null && defaultSubregion != "") {
                $("#subregionPicker" + expToken_AviationAlerts).val(defaultSubregion);
            }
            hidePageLoadingMsg($("#Interstitial_Container"+expToken_AviationAlerts));
        }
    });
    
}

function onDateRangeChange(expToken_AviationAlerts) {
    var range = $("#rangePicker" + expToken_AviationAlerts).val();
    if (range.indexOf("all") != -1 || range.indexOf("select") != -1) {
            $("#specify" + expToken_AviationAlerts).hide();
            $("#toDatePicker" + expToken_AviationAlerts).val("");
            $("#fromDatePicker" + expToken_AviationAlerts).val("");
    } else if (range.indexOf("specify") != -1) {
            $("#toDatePicker" + expToken_AviationAlerts).val("");
            $("#fromDatePicker" + expToken_AviationAlerts).val("");
            $("#specify" + expToken_AviationAlerts).show();
    } else if (range.indexOf("7 days") != -1) {
            $("#specify" + expToken_AviationAlerts).hide();
            $("#toDatePicker" + expToken_AviationAlerts).val("");
            $("#fromDatePicker" + expToken_AviationAlerts).val($.datepicker.formatDate('m/dd/yy', getdDateWithinDays(7)));
    } else if (range.indexOf("14 days") != -1) {
            $("#specify" + expToken_AviationAlerts).hide();
            $("#toDatePicker" + expToken_AviationAlerts).val("");
            $("#fromDatePicker" + expToken_AviationAlerts).val($.datepicker.formatDate('m/dd/yy', getdDateWithinDays(14)));
    } else if (range.indexOf("30 days") != -1) {
            $("#specify" + expToken_AviationAlerts).hide();
            $("#toDatePicker" + expToken_AviationAlerts).val("");
            $("#fromDatePicker" + expToken_AviationAlerts).val($.datepicker.formatDate('m/dd/yy', getdDateWithinDays(30)));                
    } else if (range.indexOf("3 months") != -1) {
            $("#specify" + expToken_AviationAlerts).hide();
            $("#toDatePicker" + expToken_AviationAlerts).val("");
            $("#fromDatePicker" + expToken_AviationAlerts).val($.datepicker.formatDate('m/dd/yy', getdDateWithinMonth(3)));                
    } else if (range.indexOf("1 year") != -1) {
            $("#specify" + expToken_AviationAlerts).hide();
            $("#toDatePicker" + expToken_AviationAlerts).val("");

            var date = new Date();
            date.setFullYear(date.getFullYear()-1,date.getMonth(),1);
            $("#fromDatePicker" + expToken_AviationAlerts).val($.datepicker.formatDate('m/dd/yy', date));                                
    }
}

function getdDateWithinDays(day) {
    var d = new Date();
    var dt = d.getTime();
    var t =  day * 24 * 60  * 60 * 1000;
    var nt = dt - t;
    d.setTime(nt);
    return d;
}

function getdDateWithinMonth(month) {
    d = new Date();
    m = d.getMonth();
    y = d.getFullYear();
    if (m < month) {
        y = y-1;
        tm = month - m;
        m = m - tm;
    } else {
        m = m - month;
    }
    d.setMonth(m);
    d.setFullYear(y);
    d.setDate(1);
    return d;
}

function displayAlertSections(section, expToken_AviationAlerts){
    section = "alertsection" + expToken_AviationAlerts + "_" + section;

    $(".Alertsection","#alertSections"+expToken_AviationAlerts).each(function(n){
        if ($(this).attr("id") == section) {
            $(this).show();
        } else {
            $(this).hide();        
        }
    });
}

function refreshSectionsAndTypes(region, subregion, from_date, to_date, alertSection, dateRange, expToken_AviationAlerts, forceRemove) {
    if(forceRemove == null){
        forceRemove=false;
    }

    if(to_date == null || to_date == ''){
        var d = new Date();
        var curr_date = d.getDate();
        var curr_month = d.getMonth() + 1;
        var curr_year = d.getFullYear();
        
        if (curr_date < 10) {
            curr_date = "0" + curr_date;
        }
        if (curr_month < 10) {
            curr_month = "0" + curr_month;
        }
        to_date=curr_month + "-" + curr_date + "-" + curr_year;
    }

    region = encodeURIComponent(region);
    subregion = encodeURIComponent(subregion);
    from_date = encodeURIComponent(from_date);
    to_date = encodeURIComponent(to_date);
    alertSection = encodeURIComponent(alertSection);
    dateRange = encodeURIComponent(dateRange)

    var form = $("#EWPTTChartChangeNoticesForm"+expToken_AviationAlerts);
    var params = "refreshSectionsAndTypes&region=" + region + "&subregion=" + subregion +  "&fromDate=" + from_date + "&toDate=" + to_date + "&alertSection=" + alertSection + "&range=" + dateRange;
    if (expToken_AviationAlerts == "EXP") {
        params += "&expanded=1";
    }
    
    showPageLoadingMsg($("#Interstitial_Container"+expToken_AviationAlerts),true,1);

    //Get the number of items in the section drop down, before it gets updated.
    var numSectionItems = $("#sectionPicker").children().length;
    
    $.post(form.attr("action"), params,
        function (xml) {
        hidePageLoadingMsg($("#Interstitial_Container"+expToken_AviationAlerts));
        $("#alerts" + expToken_AviationAlerts).html(xml);
        $("#sectionPicker" + expToken_AviationAlerts).val(alertSection);
        displayAlertSections(alertSection, expToken_AviationAlerts);

        //If the number of items is less then new one, remove the "select a chart..." item.
        if ((numSectionItems != 0 && numSectionItems < $("#sectionPicker").children().length) || forceRemove){
            $("#sectionPicker" + expToken_AviationAlerts + " option[value='select']").remove();
        }
    });
}