using System.Collections.Generic;
using System.Linq;

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 (CurveInfo == null || CurveInfo.CurveQH == null)
                return default;
            var points = 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, CurveInfo.CurveQH.FitType);
        }

        /// <summary>
        /// 通过 频率 计算流量功率曲线表达式
        /// </summary>
        public CurveExpress CalcuCurveQpByHz(double hz)
        {
            if (CurveInfo == null || CurveInfo.CurveQP == null)
                return default;
            var points = 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, CurveInfo.CurveQP.FitType);
        }

        /// <summary>
        /// 通过 频率 计算流量功率曲线表达式
        /// </summary>
        public CurveExpress CalcuCurveQeByHz(double hz)
        {
            if (CurveInfo == null || CurveInfo.CurveQE == null)
                return default;
            var points = CurveInfo.CurveQE.GetFitPoints(20);
            double f_ratio = hz / 50.0;
            var pts = points.Select(x => new CurvePoint(x.X * f_ratio, x.Y)).ToList();
            return new CurveExpress(pts, CurveInfo.CurveQE.FitType);
        }
        /// <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)
        {
            List<CurvePoint> list = null;
            switch (featCurveType)
            {
                case eFeatCurveType.QH:
                    {
                        if (CurveInfo != null && CurveInfo.CurveQH != null)
                        {
                            list = CurveInfo.CurveQH.GetFitPoints(pointNumber);
                        }
                    }
                    break;
                case eFeatCurveType.QP:
                    {
                        if (CurveInfo != null && CurveInfo.CurveQP != null)
                        {
                            list = CurveInfo.CurveQP.GetFitPoints(pointNumber);
                        }
                    }
                    break;
                case eFeatCurveType.QE:
                    {
                        if (CurveInfo != null && CurveInfo.CurveQE != null)
                        {
                            list = CurveInfo.CurveQE.GetFitPoints(pointNumber);
                        }
                    }
                    break;
                default: break;
            }
            return list;

        }


    }
}