/*=========================================================================================
    File Name: Donut.js
    Description: Chartist donut chart
    ----------------------------------------------------------------------------------------
    Item Name: Modern Admin - Clean Bootstrap 4 Dashboard HTML Template
    Author: PIXINVENT
    Author URL: http://www.themeforest.net/user/pixinvent
==========================================================================================*/

// Donut chart
// ------------------------------
$(window).on("load", function(){

    var chart = new Chartist.Pie('#donut-chart', {
        series: [10, 20, 50, 20, 5, 50, 15],
        labels: [1, 2, 3, 4, 5, 6, 7]
    }, {
        donut: true,
        showLabel: false
    });

    chart.on('draw', function(data) {
        if (data.type === 'slice') {
            // Get the total path length in order to use for dash array animation
            var pathLength = data.element._node.getTotalLength();

            // Set a dasharray that matches the path length as prerequisite to animate dashoffset
            data.element.attr({
                'stroke-dasharray': pathLength + 'px ' + pathLength + 'px'
            });

            // Create animation definition while also assigning an ID to the animation for later sync usage
            var animationDefinition = {
                'stroke-dashoffset': {
                    id: 'anim' + data.index,
                    dur: 1000,
                    from: -pathLength + 'px',
                    to: '0px',
                    easing: Chartist.Svg.Easing.easeOutQuint,
                    // We need to use `fill: 'freeze'` otherwise our animation will fall back to initial (not visible)
                    fill: 'freeze'
                }
            };

            // If this was not the first slice, we need to time the animation so that it uses the end sync event of the previous animation
            if (data.index !== 0) {
                animationDefinition['stroke-dashoffset'].begin = 'anim' + (data.index - 1) + '.end';
            }

            // We need to set an initial value before the animation starts as we are not in guided mode which would do that for us
            data.element.attr({
                'stroke-dashoffset': -pathLength + 'px'
            });

            // We can't use guided mode as the animations need to rely on setting begin manually
            // See http://gionkunz.github.io/chartist-js/api-documentation.html#chartistsvg-function-animate
            data.element.animate(animationDefinition, false);
        }
    });

    // For the sake of the example we update the chart every time it's created with a delay of 8 seconds
    chart.on('created', function() {
        if (window.__anim21278907124) {
            clearTimeout(window.__anim21278907124);
            window.__anim21278907124 = null;
        }
        window.__anim21278907124 = setTimeout(chart.update.bind(chart), 10000);
    });
});