SkyScanner.getInitializers().push(
    new Promise((resolve, reject) => {
        LN().load("/vue/ln.skyscanner.node.html").
            then((template) => {
                skyScannerRoutes.push(
                    {
                        path: "/vue/nodes/:nodeID",
                        component: {
                            template: template,
                            data: function () { return { node: null }; },
                            beforeRouteEnter: function (to, from, next) {
                                next((vm) => {
                                    skyscanner.loadNode(to.params.nodeID, (node) => {
                                        vm.node = node;
                                        vm.$nextTick(() => {
                                            skyscanner.buildGraphs(node);
                                            loadGraphs(node);
                                        });
                                    }, 10000);
                                });
                            },
                            beforeRouteLeave: function (from, to, next) {
                                clearTimeout(skyscanner.currentTimeout);
                                next();
                            },
                        },
                    }
                );
                resolve();
            });
    })
);

class ColorStack {

    constructor() {
        this.reset();

        this.axColors = [
            "#C0C0FF",
            "#C040FF",
            "#40C0FF",
            "#4040FF",
            "#C08080",
            "#80C080",
            "#808080"
        ]

    }

    reset() {
        this.resetRed()
        this.resetYellow();
        this.resetGreen();
        this.resetBlue();

        this.currentAxColor = 0;
    }
    resetRed() { this.currentRed = 208; }
    resetYellow() { this.currentYellow = 208; }
    resetGreen() { this.currentGreen = 208; }
    resetBlue() { this.currentBlue = 208; }

    toHex02(n) {
        let sn = n.toString(16);
        if (sn.length < 2)
            sn = "0" + sn;
        return sn;
    }

    toRGB(r, g, b) {
        return "#" + this.toHex02(r) + this.toHex02(g) + this.toHex02(b);
    }

    popRed() {
        this.currentRed -= 16;
        return this.toRGB(this.currentRed, 0, 0);
    }
    popYellow() {
        this.currentYellow -= 16;
        return this.toRGB(this.currentYellow, this.currentYellow, 0);
    }
    popGreen() {
        this.currentGreen -= 16;
        return this.toRGB(0, this.currentGreen, 0);
    }
    popBlue() {
        this.currentBlue -= 16;
        return this.toRGB(0, 0, this.currentBlue);
    }

    popAxColor() {
        let axColor = this.axColors[this.currentAxColor];
        this.currentAxColor = (this.currentAxColor + 1) % this.axColors.length;
        return axColor;
    }

    pop(checkState) {
        if (checkState == "CRITICAL")
            return this.popRed();
        if (checkState == "WARN")
            return this.popYellow();
        return this.popGreen();
    }
}

class ColorStackContainer {
    constructor() {
        this.colorStacks = {};
    }

    getColorStack(graphName) {
        if (!this.colorStacks.hasOwnProperty(graphName))
            this.colorStacks[graphName] = new ColorStack();

        return this.colorStacks[graphName];
    }
}

var colorContainer = new ColorStackContainer();

function toSI(value, perfUnit) {
    if (perfUnit == "%"){
        value = 100.0 * value;
    }

    if (value == 0)
        return value;

    let prefixes = { "12": "T", "9": "G", "6": "M", "3": "k", "0": " ", "-3": "m", "-6": "u", "-9": "n" }
    let lg10 = Math.log10(Math.abs(value));
    let nPrefix = Math.floor(lg10 / 3) * 3;

    let nValue = value / Math.pow(10, nPrefix);
    let prefix = prefixes[nPrefix] || `E${nPrefix}`;

    return `${nValue}${prefix}`;
}

function loadGraphs(node) {
    for (group in node._graphs) {
        if (!node._graphs.hasOwnProperty(group)) continue;

        let dataSets = [];
        let yScales = [];

        let perfValueDict = {};

        for (perfUnit in node._graphs[group]) {
            if (!node._graphs[group].hasOwnProperty(perfUnit)) continue;

            let axColor = colorContainer.getColorStack(group).popAxColor();
            let _perfUnit = perfUnit;

            yScales.push({
                display: true,
                id: perfUnit,
                scaleLabel: {
                    display: true,
                    labelString: perfUnit,
                    fontColor: axColor,
                },
                gridLines: {
                    color: axColor,
                },
                ticks: {
                    callback: function (value, index, values) {
                        try {
                            return toSI(value, _perfUnit);
                        } catch {
                            return value;
                        }
                    }
                }
            });

            for (perfName in node._graphs[group][perfUnit]) {
                if (!node._graphs[group][perfUnit].hasOwnProperty(perfName)) continue;

                let perfValue = node._graphs[group][perfUnit][perfName];
                let color = colorContainer.getColorStack(group).pop(perfValue.CheckState);

                dataSets.push({
                    perfName: perfName,
                    perfUnit: perfUnit,
                    label: perfName + (perfUnit ? " [" + perfUnit + "]" : ""),
                    data: [],
                    borderColor: color,
                    backgroundColor: color,
                    fill: false,
                    yAxisID: perfUnit,
                });

                perfValueDict[perfName] = perfValue;
            }
        }

        let chart = getOrCreateChart(`chart-${group}`, yScales, dataSets);
        chart.options.title.text = `${group}`;

        chart.data.datasets.forEach((dataSet) => {
            console.log("dataSet: " + dataSet.perfName);
            loadChartLine(chart, dataSet, perfValueDict[dataSet.perfName]);
        });

        chart.update();
    }
}

function loadChartLine(chart, dataSet, perfValue) {
    console.log("loadChartLine()");

    skyscanner.loadPerformanceGraph(perfValue.PerfPath, 3600, (perfData) => {
        console.log("loadPerformaceGraph(): callback");

        let chartColor = perfValue.CheckState == "CRITICAL" ? '#C00000' : (perfValue.CheckState == "WARN") ? '#C0C000' : '#008000';
        let perfName = perfValue.PerfName;

        dataSet.data.length = 0;
        $.each(perfData, function () {
            if (this.TimeStamp != 0)
                dataSet.data.push({ x: this.TimeStamp, y: this.Value });
        });

        chart.update();
    });
}

function getOrCreateChart(chartID, yAxes, datasets) {
    var gDiv = $("#" + CSS.escape(chartID));
    var chart = null;

    if (!gDiv.length) {
        gDiv = $("<div></div>").attr("id", chartID).css("height", "400px");
        var canvas = $("<canvas></canvas>").appendTo(gDiv);
        chart = new Chart(canvas, {
            type: 'line',
            data: {
                datasets,
            },
            options: {
                title: {
                    display: true,
                    text: '-'
                },
                scales: {
                    yAxes,
                    xAxes: [{
                        type: 'time',
                        time: {
                            unit: "minute",
                            tooltipFormat: "DD.MM.YYYY HH:mm",
                            displayFormats: {
                                minute: "DD.MM.YYYY HH:mm"
                            },
                            parser: moment.unix
                        }
                    }]
                },
                responsive: true,
                maintainAspectRatio: false,
                cubicInterpolationMode: "monotone",
                fill: false,

                tooltips: {
                    callbacks: {
                        label: function(tooltipItem, data) {
                            let dataSet = data.datasets[tooltipItem.datasetIndex];
                            let value = tooltipItem.yLabel;

                            if (dataSet.perfUnit == "%")
                            {
                                value = value * 100.0;
                            }

                            let label = dataSet.label || '';
                            if (label) {
                                label += ': ';
                            }
                            label += toSI(value);
                            return label;
                        }
                    }
                }
            }
        });
        chart.data.labels.length = 0;
        gDiv.data("chart", chart);

        $("#graphs").append(gDiv);
    } else {
        chart = gDiv.data("chart");
    }

    return chart;
}

function loadGraph(perfValue) {
    skyscanner.loadPerformanceGraph(perfValue.PerfPath, 3600, (perfData) => {
        var perfID = skyscanner.encodeID(perfValue.PerfName);
        var chartColor = perfValue.CheckState == "CRITICAL" ? '#C00000' : (perfValue.CheckState == "WARN") ? '#C0C000' : '#008000';

        var gDiv = $("#" + perfID);
        var chart = null;

        if (!gDiv.length) {
            gDiv = $("<div></div>").attr("id", perfID).css("height", "400px");
            var canvas = $("<canvas></canvas>").appendTo(gDiv);
            chart = new Chart(canvas, {
                type: 'line',
                data: {
                    datasets: [
                        {
                            label: "-",
                            data: [],
                            borderColor: chartColor,
                            backgroundColor: null,
                            fill: false,
                        }
                    ]
                },
                options: {
                    scales: {
                        yAxes: [
                            {
                                ticks: {
                                    callback: SkyScanner.scaleSI,
                                    beginAtZero: true,
                                }
                            }
                        ],
                        xAxes: [{
                            type: 'time',
                            time: {
                                unit: "minute",
                                tooltipFormat: "DD.MM.YYYY HH:mm",
                                displayFormats: {
                                    minute: "DD.MM.YYYY HH:mm"
                                },
                                parser: moment.unix
                            }
                        }]
                    },
                    responsive: true,
                    maintainAspectRatio: false,
                    cubicInterpolationMode: "monotone",
                    fill: false,
                }
            });
            chart.data.labels.length = 0;
            chart.data.datasets[0].data.length = 0;
            chart.data.datasets[0].label = perfValue.PerfName;

            gDiv.data("chart", chart);
        } else {
            chart = gDiv.data("chart");
        }

        chart.data.datasets[0].data.length = 0;
        $.each(perfData, function () {
            if (this.TimeStamp != 0)
                chart.data.datasets[0].data.push({ x: this.TimeStamp, y: this.Value });
        });

        chart.update();

        $("#graphs").append(gDiv);
    });
}