const moment = require("moment");

const nyoomfactor = {
    //Percentage of original speed to use when nyoom'ing
    1: 1.0,
    2: 1.0,
    3: 1.0,
    4: 1.0,
    5: 1.0,
    6: 1.0,
    7: 1.0,
    8: 1.0,
    9: 1.0,
    10: 1.0,
    11: 1.0,
    12: 0.9,
    13: 0.7,
    14: 0.5,
    15: 0.3,
    16: 0.3,
    17: 0.3,
    18: 0.3,
    19: 0.3,
    20: 0.3,
    50: 0.81,
    100: 0.76,
    500: 0.28,
    1000: 0.24,
    2000: 0.09,
    5000: 0.07,
    10000: 0.04,
    20000: 0.02,
};

const slowdownFactor = {
    //Percentage of slowdown per hour.
    1: 0.00001,
    2: 0.00003,
    3: 0.00003,
    4: 0.00005,
    5: 0.00005,
    6: 0.00005,
    7: 0.00005,
    8: 0.00005,
    9: 0.00005,
    10: 0.00005,
    11: 0.00005,
    12: 0.00006,
    13: 0.00007,
    14: 0.00008,
    15: 0.00009,
    16: 0.0001,
    17: 0.0001,
    18: 0.0001,
    19: 0.0001,
    20: 0.0001,
    50: 0.0002,
    100: 0.0003,
    500: 0.0004,
    1000: 0.0005,
    2000: 0.0005,
    5000: 0.0005,
    10000: 0.0005,
    20000: 0.0005,
};

class Prediction {
    chartData = {};
    predictionChartData = {};

    diffData = [];

    maxSpeed = 0;

    constructor(server) { }

    SetupPredictionModel(eventStart) {
        this.chartData = {};
        this.predictionChartData = {};
        if (this.chartData["1"] && this.chartData["1"].length > 400) {
            this.maxSpeed = Math.floor(
                this.chartData["1"][400].points /
                (moment(this.chartData["1"][400].date).diff(eventStart, "minutes") / 60)
            );
        } else if (this.chartData["1"] && this.chartData["1"].length > 0) {
            this.maxSpeed = Math.floor(
                this.chartData["1"][this.chartData["1"].length - 1].points /
                (moment(this.chartData["1"][this.chartData["1"].length - 1].date).diff(
                    eventStart,
                    "minutes"
                ) /
                    60)
            );
        } else {
            this.maxSpeed = 0;
        }
    }

    CreatePrediction(precision, rank, eventStart, eventEnd) {
        if (!this.chartData[rank]) return [];
        var startPoint = this.chartData[rank][this.chartData[rank].length - 1];
        if (rank <= 20) startPoint = { points: startPoint.points, date: moment() };
        var startTime = moment(startPoint.date);
        if (
            startTime.diff(eventStart, "hours") > 36 &&
            moment(startPoint.date).diff(eventStart, "hours") >= 36
        ) {
            //console.log(this.maxSpeed)
            //Precision is in hours. 1 is default
            var finalChart = [
                {
                    y: this.chartData[rank][this.chartData[rank].length - 1].points,
                    x: this.chartData[rank][this.chartData[rank].length - 1].date,
                },
            ];
            //Start from the time of the last reported rank.
            var myPoints = startPoint.points;
            var pointSpeed = Math.ceil(
                this.GetRank(rank) /
                (moment(startPoint.date).diff(eventStart, "minutes") / 60)
            );
            var speedGoal = this.maxSpeed * nyoomfactor[rank];
            while (startTime < eventEnd) {
                startTime.add(precision, "hours");
                myPoints += Math.floor(pointSpeed);
                if (eventEnd.diff(startTime, "hours") > 11) {
                    pointSpeed -= pointSpeed * (slowdownFactor[rank] * 10) /*CONSTANT for adjustment*/;
                } else {
                    pointSpeed = Math.max(
                        this.GetRank(rank) /
                        (moment(startPoint.date).diff(eventStart, "minutes") / 60),
                        Math.min(
                            (12 - eventEnd.diff(startTime, "hours")) * (speedGoal / 5),
                            speedGoal
                        )
                    );
                    //pointSpeed+=(speedGoal-pointSpeed) //Increase towards final goal.
                    //console.log(pointSpeed)
                }
                finalChart = [
                    ...finalChart,
                    {
                        y: Number.isInteger(myPoints) ? myPoints : "???",
                        x: moment(startTime),
                    },
                ];
            }
            this.predictionChartData[rank] = finalChart;
            return finalChart;
        } else if (startTime.diff(eventStart, "hours") > 24 &&
            moment(startPoint.date).diff(eventStart, "hours") >= 24
        ) {
            //console.log(this.maxSpeed)
            //Precision is in hours. 1 is default
            var finalChart = [
                {
                    y: this.chartData[rank][this.chartData[rank].length - 1].points,
                    x: this.chartData[rank][this.chartData[rank].length - 1].date,
                },
            ];
            //Start from the time of the last reported rank.
            var myPoints = startPoint.points;
            var pointSpeed = this.GetRate(rank);
            var speedGoal = this.maxSpeed * nyoomfactor[rank];
            while (startTime < eventEnd) {
                startTime.add(precision, "hours");
                myPoints += Math.floor(pointSpeed);
                if (eventEnd.diff(startTime, "hours") > 11) {
                    pointSpeed -=
                        pointSpeed *
                        (slowdownFactor[rank] * 10) /*CONSTANT for adjustment*/;
                } else {
                    pointSpeed = Math.max(
                        this.GetRank(rank) /
                        (moment(startPoint.date).diff(eventStart, "minutes") / 60),
                        Math.min(
                            (12 - eventEnd.diff(startTime, "hours")) * (speedGoal / 5),
                            speedGoal
                        )
                    );
                    //pointSpeed+=(speedGoal-pointSpeed) //Increase towards final goal.
                    //console.log(pointSpeed)
                }
                finalChart = [
                    ...finalChart,
                    {
                        y: Number.isInteger(myPoints) ? myPoints : "???",
                        x: moment(startTime),
                    },
                ];
            }
            this.predictionChartData[rank] = finalChart;
            return finalChart;
        } else {
            return [];
        }
    }

    GetRank(rank) {
        if (this.chartData[rank]) {
            return this.chartData[rank][this.chartData[rank].length - 1].points;
        } else {
            return "???";
        }
    }

    GetEstimate(rank) {
        if (this.predictionChartData[rank]) {
            var currentEstimate = 0;
            if (
                rank > 20 &&
                moment().diff(
                    moment(this.chartData[rank][this.chartData[rank].length - 1].date),
                    "hours"
                ) > 0.5
            ) {
                for (var i = this.predictionChartData[rank].length - 1; i >= 0; i--) {
                    if (moment(this.predictionChartData[rank][i].x).isAfter(moment())) {
                        currentEstimate = this.predictionChartData[rank][i].y;
                    } else {
                        break;
                    }
                }

                return currentEstimate;
            } else {
                if (rank > 20) {
                    return this.GetRank(rank);
                } else {
                    return "---";
                }
            }
        } else {
            return "???";
        }
    }

    GetTime(rank) {
        if (this.chartData[rank]) {
            return moment(this.chartData[rank][this.chartData[rank].length - 1].date).fromNow();
        } else {
            return "";
        }
    }

    GetUpdateColor(rank, en) {
        if (this.chartData[rank]) {
            return (
                "rgba(255," +
                Math.max(
                    255 -
                    moment().diff(
                        moment(this.chartData[rank][this.chartData[rank].length - 1].date),
                        "hours"
                    ) *
                    3,
                    0
                ) +
                "," +
                Math.max(
                    255 -
                    moment().diff(
                        moment(this.chartData[rank][this.chartData[rank].length - 1].date),
                        "hours"
                    ) *
                    3,
                    0
                ) +
                ",1)"
            );
        } else {
            return "";
        }
    }

    ChartData(rank, eventStart, eventEnd) {
        if (!this.chartData[rank]) {
            return [{ x: 0, y: 0 }];
        }
        if (rank <= 20) {
            return [
                ...this.chartData[rank].map((data) => {
                    return { x: data.date, y: data.points };
                }),
                {
                    x: moment().isBefore(eventEnd) ? moment() : eventEnd,
                    y: this.chartData[rank][this.chartData[rank].length - 1].points,
                },
            ];
        } else {
            return [
                { x: eventStart, y: 0 },
                ...this.chartData[rank].map((data) => {
                    return { x: data.date, y: data.points };
                }),
            ];
        }
    }

    GetPointCount(rank) {
        let pointCount = 1;
        const RATEDURATION = 1;
        if (!this.chartData[rank]) {
            return pointCount;
        }
        if (this.chartData[rank].length > 2) {
            var lastpoint = this.chartData[rank][this.chartData[rank].length - 1];
            for (var i = this.chartData[rank].length - 1; i >= 0; i--) {
                var diff = moment().diff(this.chartData[rank][i].date, "hours");
                if (diff >= RATEDURATION) {
                    break;
                } else {
                    lastpoint = this.chartData[rank][i];
                    pointCount++;
                }
            }
            return pointCount;
        } else {
            if (this.chartData[rank].length > 0) {
                return this.chartData[rank].length;
            } else {
                return pointCount;
            }
        }
    }

    GetNameData = (t) => {
        var tempname = "";
        if (
            this.chartData[t] &&
            this.chartData[t][this.chartData[t].length - 1] &&
            this.chartData[t][this.chartData[t].length - 1].name
        ) {
            tempname = this.chartData[t][this.chartData[t].length - 1].name;
        }
        var tempdesc = "";
        if (
            this.chartData[t] &&
            this.chartData[t][this.chartData[t].length - 1] &&
            this.chartData[t][this.chartData[t].length - 1].description
        ) {
            tempdesc = this.chartData[t][this.chartData[t].length - 1].description;
        }
        return { tempname, tempdesc }
    }


    GetRate(rank, eventStart) {

        const RATEDURATION = 1; //In hours. How much EP/hr is shown.

        if (this.chartData[rank].length > 2) {
            var lastpoint = this.chartData[rank][this.chartData[rank].length - 1];
            for (var i = this.chartData[rank].length - 1; i >= 0; i--) {
                var diff = moment().diff(this.chartData[rank][i].date, "hours");
                if (diff >= RATEDURATION) {
                    break;
                } else {
                    lastpoint = this.chartData[rank][i];
                }
            }
            var timediff = moment(
                this.chartData[rank][this.chartData[rank].length - 1].date
            ).diff(moment(lastpoint.date), "minutes");
            if (timediff < 120) {
                if (lastpoint === this.chartData[rank][this.chartData[rank].length - 1]) {
                    return "???";
                } else
                    return (
                        (this.chartData[rank][this.chartData[rank].length - 1].points -
                            lastpoint.points) /
                        RATEDURATION
                    );
            } else {
                return Math.ceil(
                    (this.chartData[rank][this.chartData[rank].length - 1].points -
                        lastpoint.points) /
                    (moment(this.chartData[rank][this.chartData[rank].length - 1].date).diff(
                        moment(lastpoint.date),
                        "minutes"
                    ) /
                        60)
                );
            }
        } else {
            if (this.chartData[rank].length > 0) {
                var startPoint = this.chartData[rank][this.chartData[rank].length - 1];
                return Math.ceil(
                    this.GetRank(rank) /
                    (moment(startPoint.date).diff(eventStart, "minutes") / 60)
                );
            } else {
                return 0;
            }
        }

    }

}
exports.Prediction = Prediction