/**
 * Ajax get chart data.
 *
 * @access public
 * @return bool
 */
function ajaxGetChart(check = true, chart = DataStorage.chart, echart = window.echart, noDataDom = window.noDataDom)
{
    var chartParams = JSON.parse(JSON.stringify(chart));
    if(typeof DataStorage != 'undefined') chartParams.fieldSettings = JSON.parse(JSON.stringify(DataStorage.fieldSettings));
    if(typeof DataStorage != 'undefined') chartParams.langs         = JSON.parse(JSON.stringify(DataStorage.langs));

    /* Redraw echart. */
    /* 拿数据并重绘图表。*/
    $.post(createLink('chart', 'ajaxGetChart'), chartParams, function(resp)
    {
        var data = JSON.parse(resp);
        if(echart)
        {
            var type = chartParams.settings[0].type;
            if(type == 'waterpolo')
            {
                data.series[0].label.formatter = function(params) { return (params.value * 100).toFixed(2) + '%';};
                data.tooltip.formatter         = function(params) { return (params.value * 100).toFixed(2) + '%';};
            }

            if(canLabelRotate.includes(type))
            {
                if(!data.xAxis.axisLabel) data.xAxis.axisLabel = {};
                if(!data.yAxis.axisLabel) data.yAxis.axisLabel = {};
                var labelFormatter = function(value)
                {
                    value = value.toString();
                    return (value.length <= labelMaxLength) ? value : value.substring(0, labelMaxLength) + '...';
                }

                data.xAxis.axisLabel.formatter = labelFormatter;
                data.yAxis.axisLabel.formatter = labelFormatter;
            }

            echart.resize();
            echart.clear();
            if(isChartHaveData(data, type))
            {
                echart.setOption(data, true);
                $('.btn-export').removeClass('hidden');
                noDataDom.addClass('hidden');
            }
            else
            {
                noDataDom.removeClass('hidden');
            }
        }
    });
}

/**
 * Determine whether the returned data is available.
 *
 * @access public
 * @return bool
 */
function isChartHaveData(dataInfo, type)
{
    if(type == 'waterpolo') return true;
    var data = [];
    if(type == 'pie') data = dataInfo.series[0].data;
    if(type == 'line') data = dataInfo.xAxis.data;
    if(type == 'radar') data = dataInfo.radar.indicator;
    if(type == 'cluBarY' || type == 'stackedBarY') data = dataInfo.yAxis.data;
    if(type == 'cluBarX' || type == 'stackedBar') data = dataInfo.xAxis.data;

    return data.length;
}

function resizeChart()
{
    var filterHeight = $('.main-col .cell #filterContent').height();
    $('.main-col .cell #draw').css('height', 'calc(100% - ' + (filterHeight + 16) + 'px)')

    if(echart)
    {
        echart.resize();
    }
}

function waitForRepaint(callback)
{
    window.requestAnimationFrame(function()
    {
        window.requestAnimationFrame(callback);
    });
}

/**
 * Init picker.
 *
 * @access public
 * @return void
 */
function initPicker($row, pickerName = 'picker-select', onready = false)
{
    $row.find('.' + pickerName).picker(
    {
        maxDropHeight: pickerHeight,
        onReady: function()
        {
            if(!onready) return;
            if(!$row.find('.picker')) return;
            if(window.getComputedStyle($row.find('.picker').find('.picker-selections')[0]).getPropertyValue('width') !== 'auto')
            {
                var pickerWidth = $row.find('.picker')[0].getBoundingClientRect().width;
                $row.find('.picker').find('.picker-selections').css('width', pickerWidth);
            }
        }
    });
    $row.find("." + pickerName).each(function(index)
    {
       if($(this).hasClass('required')) $(this).siblings("div .picker").addClass('required');
    });
}

/**
 * Init datepicker.
 *
 * @param  object   $obj
 * @param  function callback
 * @access public
 * @return void
 */
function initDatepicker($obj, callback)
{
    $obj.find('.form-date').datepicker();
    $obj.find('.form-datetime').datetimepicker();

    if(typeof callback == 'function') callback($obj);
}

/**
 * Attr date check.
 *
 * @param  object $obj
 * @access public
 * @return void
 */
function attrDateCheck($obj)
{
    $obj.find('.form-date').attr('onchange', 'checkDate(this, this.value)');
    $obj.find('.form-datetime').attr('onchange', 'checkDate(this, this.value)');
}