using System;
using cAlgo.API;
using cAlgo.API.Collections;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;

namespace cAlgo
{
    [Levels(0, -7, +7)]
    [Indicator(IsOverlay = false, AccessRights = AccessRights.None)]
    public class mSZO : Indicator
    {
        [Parameter("Period SZO", DefaultValue = 14)]
        public int inpPeriodSZO { get; set; }
        [Parameter("Show Levels", DefaultValue = true)]
        public bool inpShowDLev { get; set; }
        [Parameter("Show Mid Levels", DefaultValue = true)]
        public bool inpShowMidLev { get; set; }
        [Parameter("inpPeriodDLev", DefaultValue = 30)]
        public int inpPeriodDLev { get; set; }
        [Parameter("InpPercentDLev", DefaultValue = 95.0)]
        public double InpPercentDLev { get; set; }

        [Output("Main", IsHistogram = false, LineColor = "Black", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outSZO { get; set; }
        [Output("outTop", IsHistogram = false, LineColor = "Red", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outTop { get; set; }
        [Output("outBottom", IsHistogram = false, LineColor = "Red", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outBottom { get; set; }
        [Output("outMiddle", IsHistogram = false, LineColor = "LightGreen", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outMiddle { get; set; }

        private IndicatorDataSeries _data, _szo;
        private ExponentialMovingAverage _ema1, _ema2, _ema3;
        private double _highlvl, lowlvl, _range, _rangeproc;


        protected override void Initialize()
        {
            _data = CreateDataSeries();
            _szo = CreateDataSeries();
            _ema1 = Indicators.ExponentialMovingAverage(_data, inpPeriodSZO);
            _ema2 = Indicators.ExponentialMovingAverage(_ema1.Result, inpPeriodSZO);
            _ema3 = Indicators.ExponentialMovingAverage(_ema2.Result, inpPeriodSZO);
        }

        public override void Calculate(int i)
        {
            _data[i] = (i > 1 && Bars.ClosePrices[i] > Bars.ClosePrices[i - 1] ? 1 : -1);
            _szo[i] = 100.0 * ((3 * _ema1.Result[i] - 3 * _ema2.Result[i] + _ema3.Result[i]) / inpPeriodSZO);

            outSZO[i] = _szo[i];

            if (inpShowDLev && i > inpPeriodDLev)
            {
                _highlvl = _szo[i];
                lowlvl = _szo[i];
                for (int j = inpPeriodDLev - 1; j >= 0; j--)
                {
                    if (_highlvl < _szo[i - j])
                        _highlvl = _szo[i - j];
                    if (lowlvl > _szo[i - j])
                        lowlvl = _szo[i - j];
                }
                _range = _highlvl - lowlvl;
                _rangeproc = _range * (InpPercentDLev / 100.0);

                outTop[i] = lowlvl + _rangeproc;
                outBottom[i] = _highlvl - _rangeproc;
                outMiddle[i] = inpShowMidLev == true ? (lowlvl + _rangeproc + _highlvl - _rangeproc) / 2 : double.NaN;
            }
        }
    }
}