<!doctype html>
<html>

<head>
    <title>Bar Chart Multi Axis</title>
    <script src="../../dist/Chart.bundle.js"></script>
    <script src="../utils.js"></script>
    <style>
    canvas {
        -moz-user-select: none;
        -webkit-user-select: none;
        -ms-user-select: none;
    }
    </style>
</head>

<body>
    <div style="width: 75%">
        <canvas id="canvas"></canvas>
    </div>
    <button id="randomizeData">Randomize Data</button>
    <script>
    var barChartData = {
        labels: ["January", "February", "March", "April", "May", "June", "July"],
        datasets: [{
            label: 'Dataset 1',
            backgroundColor: [
                window.chartColors.red,
                window.chartColors.orange,
                window.chartColors.yellow,
                window.chartColors.green,
                window.chartColors.blue,
                window.chartColors.purple,
                window.chartColors.red
            ],
            yAxisID: "y-axis-1",
            data: [
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor()
            ]
        }, {
            label: 'Dataset 2',
            backgroundColor: window.chartColors.grey,
            yAxisID: "y-axis-2",
            data: [
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor(), 
                randomScalingFactor()
            ]
        }]

    };
    window.onload = function() {
        var ctx = document.getElementById("canvas").getContext("2d");
        window.myBar = new Chart(ctx, {
            type: 'bar',
            data: barChartData, 
            options: {
                responsive: true,
                title:{
                    display:true,
                    text:"Chart.js Bar Chart - Multi Axis"
                },
                tooltips: {
                    mode: 'index',
                    intersect: true
                },
                scales: {
                    yAxes: [{
                        type: "linear", // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance
                        display: true,
                        position: "left",
                        id: "y-axis-1",
                    }, {
                        type: "linear", // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance
                        display: true,
                        position: "right",
                        id: "y-axis-2",
                        gridLines: {
                            drawOnChartArea: false
                        }
                    }],
                }
            }
        });
    };

    document.getElementById('randomizeData').addEventListener('click', function() {
        barChartData.datasets.forEach(function(dataset, i) {
            dataset.data = dataset.data.map(function() {
                return randomScalingFactor();
            });
        });
        window.myBar.update();
    });
    </script>
</body>

</html>
