const gaugeOptions = {
    chart: {
        type: 'solidgauge'
    },

    title: null,

    pane: {
        center: ['50%', '85%'],
        size: '140%',
        startAngle: -90,
        endAngle: 90,
        background: {
            backgroundColor:
                Highcharts.defaultOptions.legend.backgroundColor || '#fafafa',
            borderRadius: 5,
            innerRadius: '60%',
            outerRadius: '100%',
            shape: 'arc'
        }
    },

    exporting: {
        enabled: false
    },

    tooltip: {
        enabled: false
    },

    // the value axis
    yAxis: {
        stops: [
            [0.1, '#55BF3B'], // green
            [0.5, '#DDDF0D'], // yellow
            [0.9, '#DF5353'] // red
        ],
        lineWidth: 0,
        tickWidth: 0,
        minorTickInterval: null,
        tickAmount: 2,
        title: {
            y: -70
        },
        labels: {
            y: 16
        }
    },

    plotOptions: {
        solidgauge: {
            borderRadius: 3,
            dataLabels: {
                y: 5,
                borderWidth: 0,
                useHTML: true
            }
        }
    }
};

// The speed gauge
const chartSpeed = Highcharts.chart(
    'container-speed', Highcharts.merge(gaugeOptions, {
        yAxis: {
            min: 0,
            max: 200,
            title: {
                text: 'Speed'
            }
        },

        credits: {
            enabled: false
        },

        series: [{
            name: 'Speed',
            data: [80],
            dataLabels: {
                format:
                '<div style="text-align:center">' +
                '<span style="font-size:25px">{y}</span><br/>' +
                '<span style="font-size:12px;opacity:0.4">km/h</span>' +
                '</div>'
            },
            tooltip: {
                valueSuffix: ' km/h'
            }
        }]

    }));

// The RPM gauge
const chartRpm = Highcharts.chart(
    'container-rpm', Highcharts.merge(gaugeOptions, {
        yAxis: {
            min: 0,
            max: 5,
            title: {
                text: 'RPM'
            }
        },

        series: [{
            name: 'RPM',
            data: [1],
            dataLabels: {
                format:
                '<div style="text-align:center">' +
                '<span style="font-size:25px">{y:.1f}</span><br/>' +
                '<span style="font-size:12px;opacity:0.4">' +
                '* 1000 / min' +
                '</span>' +
                '</div>'
            },
            tooltip: {
                valueSuffix: ' revolutions/min'
            }
        }]

    }));

// Bring life to the dials
setInterval(function () {
    // Speed
    let point,
        newVal,
        inc;

    if (chartSpeed) {
        point = chartSpeed.series[0].points[0];
        inc = Math.round((Math.random() - 0.5) * 100);
        newVal = point.y + inc;

        if (newVal < 0 || newVal > 200) {
            newVal = point.y - inc;
        }

        point.update(newVal);
    }

    // RPM
    if (chartRpm) {
        point = chartRpm.series[0].points[0];
        inc = Math.random() - 0.5;
        newVal = point.y + inc;

        if (newVal < 0 || newVal > 5) {
            newVal = point.y - inc;
        }

        point.update(newVal);
    }
}, 2000);