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

namespace wms.service.Help.LayerPacking.model
{
    /// <summary>
    /// 层信息
    /// </summary>
    public class LayerPackingLayerInfo
    {
        /// <summary>
        /// 层产品
        /// </summary>
        public List<LayerPackingProduct> Products { get; set; }

        /// <summary>
        /// 层总扭转值
        /// </summary>
        public decimal TotalTorsion => Products.Sum(p => p.TorsChkValue);

        /// <summary>
        /// 层总焊点盘数
        /// </summary>
        public int SolderProductCount => Products.Count(p => p.IsSolderProduct);

        /// <summary>
        /// 层总焊点数
        /// </summary>
        public decimal TotalSolderJoints => Products.Sum(p => p.SolderCount);

        /// <summary>
        /// 层最小目标值
        /// </summary>
        public decimal MinLayerTarget { get; set; }

        /// <summary>
        /// 层最大目标值
        /// </summary>
        public decimal MaxLayerTarget { get; set; }

        /// <summary>
        /// 层去掉最大最小值后的最大标准差
        /// </summary>
        private double LayerStandardDeviation = 0.5;

        /// <summary>
        /// 层目标值
        /// </summary>
        public decimal LayerTarget { get; set; }

        /// <summary>
        /// 构造函数
        /// </summary>
        public LayerPackingLayerInfo()
        {
            Products = new List<LayerPackingProduct>();
        }

        /// <summary>
        /// 当前层是否有效
        /// </summary>
        /// <param name="constraints"></param>
        /// <returns></returns>
        public bool IsValid(LayerPackingConstraints constraints)
        {
            var total = TotalTorsion;
            return total >= constraints.MinLayerTotal && total <= constraints.MaxLayerTotal && LayerStdValid();
        }

        /// <summary>
        /// 获取当前层偏差
        /// </summary>
        /// <param name="target"></param>
        /// <returns></returns>
        public decimal GetDeviationFromTarget(decimal target)
        {
            return Math.Abs(TotalTorsion - target);
        }

        /// <summary>
        /// 当前层中极值对是否有效
        /// </summary>
        /// <param name="highThreshold">大极值阈值</param>
        /// <param name="lowThreshold">小极值阈值</param>
        /// <returns></returns>
        public bool HasValidExtremePair(decimal highThreshold, decimal lowThreshold)
        {
            var highCount = Products.Count(p => p.TorsChkValue >= highThreshold);
            var lowCount = Products.Count(p => p.TorsChkValue <= lowThreshold);
            return highCount == 0 && lowCount == 0 || highCount == 1 && lowCount == 1;
        }

        /// <summary>
        /// 去除最大/最小值后10个产品的标准差≤0.5
        /// </summary>
        /// <returns></returns>
        public bool LayerStdValid()
        {
            if (Products == null || Products.Count < 3) return true;

            var ordered = Products.OrderBy(p => p.TorsChkValue).ToList();
            var ten = ordered.Skip(1).Take(Products.Count - 2).ToList();
            if (ten.Count > 10)
            {
                int skip = (ten.Count - 10) / 2;
                ten = ten.Skip(skip).Take(10).ToList();
            }
            if (ten.Count < 1) return true;

            double avg = (double)ten.Average(p => p.TorsChkValue);
            double std = Math.Sqrt(ten.Sum(p => Math.Pow((double)p.TorsChkValue - avg, 2)) / ten.Count);
            return std <= LayerStandardDeviation;
        }

        /// <summary>
        /// 获取层标准差（去除最大最小后10个产品）
        /// </summary>
        public double GetStdAfterTrim()
        {
            if (Products == null || Products.Count < 3) return 0;

            var ordered = Products.OrderBy(p => p.TorsChkValue).ToList();
            var ten = ordered.Skip(1).Take(Products.Count - 2).ToList();
            if (ten.Count > 10)
            {
                int skip = (ten.Count - 10) / 2;
                ten = ten.Skip(skip).Take(10).ToList();
            }
            if (ten.Count < 1) return 0;

            double avg = (double)ten.Average(p => p.TorsChkValue);
            double std = Math.Sqrt(ten.Sum(p => Math.Pow((double)p.TorsChkValue - avg, 2)) / ten.Count);
            return std;
        }
    }
}