using Kingdee.BOS.Util;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Pilot_KD_Parino.Common
{
    public class CombinationGenerator
    {


        public static List<DataItem> DeleteCombinationsDataByList(List<DataItem> List, List<string> FBILLNO)
        {
            foreach (var item in FBILLNO)
            {
                List.RemoveAll(t => t.FBIllNO.Contains(item));
            }
            return List;
        }



        public static List<DataItem> GetCombinationsDataByList(List<DataItem> List, double FAllAmount, int FClient)
        {
            return List.Where(t => t.FALLAMOUNT == FAllAmount && t.FClient2.Contains(FClient)).ToList();
        }

        public static List<DataItem> GetCombinationsDataByListTK(List<DataItem> List, double FAllAmount, int FClient)
        {
            var TestList = List.Where(t => t.FALLAMOUNT == FAllAmount && t.FClient2.Contains(FClient)).ToList();
            foreach (var item in TestList)
            {
                var fbnumber = item.FBIllNO;
                item.FBIllNO2 = fbnumber;
                item.FBIllNO = new List<string>();
            }
            return TestList;
        }

        public static List<DataItem> GetCombinationsDataByList2(List<DataItem> List, double FAllAmount,int FClient)
        {
            return List.Where(t => t.FALLAMOUNT == FAllAmount && t.FBIllNO.Count == 1 && t.FClient2[0].Equals(FClient)).ToList();
        }


        /// <summary>
        /// 计算取值
        /// </summary>
        /// <param name="List"></param>
        /// <param name="index"></param>
        /// <param name="FBILLNOLIST"></param>
        /// <param name="result"></param>
        /// <param name="FAllAmount"></param>
        public static void GetCombinations(List<CombinaClass> List, int index, List<string> FBILLNOLIST, List<int> FClient, ref List<DataItem> result, double FAllAmount)
        {
            var FBILLNOLIST2 = new List<string>(FBILLNOLIST);
            var FClient2 = new List<int>(FClient);
            var item = List.GroupBy(a => a.FClient).ToList();

            for (int i = index; i < List.Count; i++)
            {
                FBILLNOLIST2.Add(List[i].FBIllNO);
                FClient2.Add(List[i].FClient);
                DataItem DataItem = new DataItem();
                DataItem.FBIllNO = new List<string>(FBILLNOLIST2);
                DataItem.FClient2 = new List<int>(FClient2);
                DataItem.FALLAMOUNT = FAllAmount + List[i].FALLAMOUNT;
                result.Add(DataItem);
                if (i < 9)
                {
                    GetCombinations(List, i + 1, FBILLNOLIST2, FClient2, ref result, FAllAmount + List[i].FALLAMOUNT);
                }
                FBILLNOLIST2 = new List<string>(FBILLNOLIST);
            }
        }

        /// <summary>
        /// 计算取值
        /// </summary>
        /// <param name="List"></param>
        /// <param name="index"></param>
        /// <param name="FBILLNOLIST"></param>
        /// <param name="result"></param>
        /// <param name="FAllAmount"></param>
        public static void GetCombinations2(List<CombinaClass> List, int index, List<string> FBILLNOLIST, List<int> FClient, ref List<DataItem> result, double FAllAmount)
        {
            var FBILLNOLIST2 = new List<string>(FBILLNOLIST);
            var FClient2 = new List<int>(FClient);
            var item = List.GroupBy(a => a.FClient).ToList();

            for (int i = index; i < List.Count; i++)
            {
                FBILLNOLIST2.Add(List[i].FBIllNO);
                FClient2.Add(List[i].FClient);
                DataItem DataItem = new DataItem();
                DataItem.FBIllNO = new List<string>(FBILLNOLIST2);
                DataItem.FClient2 = new List<int>(FClient2);
                DataItem.FALLAMOUNT = FAllAmount + List[i].FDAMOUNT;
                result.Add(DataItem);
                if (i < 10)
                {
                    GetCombinations2(List, i + 1, FBILLNOLIST2, FClient2, ref result, FAllAmount + List[i].FDAMOUNT);
                }
                FBILLNOLIST2 = new List<string>(FBILLNOLIST);
            }
        }


        public static List<List<T>> GetCombinations2<T>(T[] array)
        {
            List<double> FAllmount = new List<double>();
            List<int> FDaySum = new List<int>();
            List<List<T>> result = new List<List<T>>();
            Combine2(array, 0, new List<T>(), FAllmount, FDaySum, ref result);
            return result;
        }

        static void Combine2<T>(T[] array, int index, List<T> combination, List<double> FAllmount, List<int> FDaySum, ref List<List<T>> result)
        {
            for (int i = index; i < array.Length; i++)
            {

                combination.Add(array[i]);
                Combine2(array, i + 1, combination, FAllmount, FDaySum, ref result);
                combination.RemoveAt(combination.Count - 1); // 回溯
            }
            if (combination.Count > 0)
            {
                result.Add(new List<T>(combination));
            }
        }












        public static List<string[]> GetCombinations(List<string[]> array)
        {
            List<string[]> result = new List<string[]>();
            List<string> FIDList = new List<string>();
            List<string> FEntryList = new List<string>();
            List<double> FAllmount = new List<double>();
            List<int> FDaySum = new List<int>();
            Combine(array, 0, new List<string[]>(), FIDList, FEntryList, FAllmount, FDaySum, ref result);
            return result;
        }

        static void Combine(List<string[]> array, int index, List<string[]> combination, List<string> FIDList, List<string> FEntryList,
            List<double> FAllmount, List<int> FDaySum, ref List<string[]> result)
        {
            for (int i = index; i < array.Count; i++)
            {
                FIDList.Add(Convert.ToString(array[i][0]));
                FEntryList.Add(Convert.ToString(array[i][3]));
                FAllmount.Add(Convert.ToDouble(array[i][2]));
                FDaySum.Add(CulDayByDate(Convert.ToDateTime(array[i][1]), DateTime.Now));
                combination.Add(new string[4] { string.Join("-", FIDList), string.Join("-", FEntryList), "0", "0" });
                Combine(array, i + 1, combination, FIDList, FEntryList, FAllmount, FDaySum, ref result);
                //FIDList.RemoveAt(FIDList.Count - 1); // 回溯
                //FEntryList.RemoveAt(FEntryList.Count - 1); // 回溯
                //FAllmount.RemoveAt(combination.Count - 1); // 回溯
                //FDaySum.RemoveAt(FDaySum.Count - 1); // 回溯
                combination.RemoveAt(combination.Count - 1); // 回溯
            }
            //if (FIDList.Count > 0)
            //{
            result.Add(new string[4] { string.Join("-", FIDList), string.Join("-", FEntryList), FAllmount.Sum().ToString(), FDaySum.Sum().ToString() });
            //}
        }
        /// <summary>
        /// 计算两日期天数差
        /// </summary>
        /// <param name="date1"></param>
        /// <param name="date2"></param>
        /// <returns></returns>
        public static int CulDayByDate(DateTime date1, DateTime date2)
        {
            TimeSpan difference = date2.Subtract(date1);
            return difference.Days;

        }
    }
}