using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace IStation.Model
{
    public partial class PumpCurve
    {
        /// <summary>
        /// 通过 频率 计算流量扬程曲线表达式
        /// </summary>
        public CurveExpress CalcuCurveQhByHz(double hz)
        {
            if (this.CurveInfo == null||this.CurveInfo.CurveQH==null)
                return default;
            var points = this.CurveInfo?.CurveQH?.GetFitPoints(20);
            double f_ratio = hz / 50.0;
            var pts = points.Select(x => new CurvePoint(x.X * f_ratio, x.Y * f_ratio * f_ratio)).ToList();
            return new CurveExpress(pts);
        }

        /// <summary>
        /// 通过 频率 计算流量功率曲线表达式
        /// </summary>
        public CurveExpress CalcuCurveQpByHz(double hz)
        {
            if (this.CurveInfo == null||this.CurveInfo.CurveQP==null)
                return default;
            var points = this.CurveInfo.CurveQP.GetFitPoints(20);
            double f_ratio = hz / 50.0;
            var pts = points.Select(x => new CurvePoint(x.X * f_ratio, x.Y * f_ratio * f_ratio * f_ratio)).ToList();
            return new CurveExpress(pts);
        }

        /// <summary>
        /// 通过 流量 获取 拟合功率
        /// </summary>
        public double GetFitP(double hz, double q)
        {
            var express = CalcuCurveQpByHz(hz);
            return FitCurveHelper.GetFitPointY(express, q);
        }

        /// <summary>
        /// 获取拟合点
        /// </summary>
        public List<CurvePoint> GetFitPoints(eFeatCurveType featCurveType, int pointNumber = 20)
        {
            if (this.PointInfo == null)
                return default;
            List<CurvePoint> list = null;
            switch (featCurveType)
            {
                case eFeatCurveType.QH:
                    {
                        if (this.CurveInfo != null && this.CurveInfo.CurveQH != null)
                        {
                            list=this.CurveInfo.CurveQH.GetFitPoints(pointNumber);
                        }
                    }
                    break;
                case eFeatCurveType.QP:
                    {
                        if (this.CurveInfo != null && this.CurveInfo.CurveQP != null)
                        {
                            list = this.CurveInfo.CurveQP.GetFitPoints(pointNumber);
                        }
                    }
                    break;
                case eFeatCurveType.QE:
                    {
                        if (this.CurveInfo != null && this.CurveInfo.CurveQE != null)
                        {
                            list = this.CurveInfo.CurveQE.GetFitPoints(pointNumber);
                        }
                    }
                    break;
                default:break;
            }
            return list;

        }

        /// <summary>
        /// api中, 用于返回到前段ECHART用
        /// </summary>
        /// <param name="curveExpress"></param>
        /// <param name="PointNumber"></param>
        /// <returns></returns>
        static public List<List<double>> GetEChartPoint(IStation.Model.CurveExpress curveExpress, int PointNumber)
        {
            if (curveExpress == null)
                return null;
            if (PointNumber > 10000)
                PointNumber = 10000;
            if (PointNumber <= 0)
                PointNumber = 12;

            var ev_points = IStation.Model.FitCurveHelper.GetFitPoints(curveExpress, PointNumber);
            List<List<double>> echart_points = new List<List<double>>();
            foreach (var ev_pt in ev_points)
            {
                if (ev_pt.Y > 0)
                {
                    List<double> echart_point = new List<double>();
                    echart_point.Add(ev_pt.X);
                    echart_point.Add(ev_pt.Y);
                    echart_points.Add(echart_point);
                }

            }

            return echart_points;
        }

    }
}