using MathNet.Numerics.LinearAlgebra.Double;
using System;
using System.Collections.Generic;
using System.Text;

namespace TEAMModelOS.SDK.Models.Service.BI
{
    public static class BICommonWay
    {

        /// <summary>
        /// 字串类型分割成double类型数组，在指定位置赋值
        /// </summary>
        /// <param name="source">需要分割的字符</param>
        /// <param name="splitChar">分割字符</param>
        /// <param name="indexes">索引</param>
        /// <param name="num">需要加减数量</param>
        /// <returns></returns>
        public static string SplitStr(string source, char splitChar, int indexes, int num)
        {
            string str = null;
            if (source != null)
            {
                double[] temps = Array.ConvertAll<string, double>(source.Split(splitChar), s => double.Parse(s));
                temps[indexes] = temps[indexes] + num;
                str = string.Join(splitChar, temps);
            }
            if (str != null)
                return str;
            else
                return source;
        }

        /// <summary>
        /// 多个拼接in条件
        /// </summary>
        /// <param name="condName"></param>
        /// <param name="scIds"></param>
        /// <returns></returns>
        public static string ManyScSql(string condName, List<string> scIds, string addStr = null)
        {
            StringBuilder scSql = new();
            if (scIds.Count > 0)
            {
                scSql.Append($" {condName} in (");
                for (int i = 0; i < scIds.Count; i++)
                {
                    if (i == scIds.Count - 1)
                    {
                        if (string.IsNullOrEmpty(addStr))
                            scSql.Append($"'{scIds[i]}'");
                        else
                            scSql.Append($"'{addStr}{scIds[i]}'");
                    }
                    else
                    {
                        if (string.IsNullOrEmpty(addStr))
                            scSql.Append($"'{scIds[i]}',");
                        else
                            scSql.Append($"'{addStr}{scIds[i]}',");
                    }

                }
                scSql.Append($" )");
            }

            return scSql.ToString();
        }

        /// <summary>
        /// 每列合并 多个数组合并成一个数组 列合并
        /// </summary>
        /// <param name="doubles"></param>
        /// <returns></returns>
        public static List<double> ManyDoubleMerge(List<List<double>> doubles)
        {
            List<double> retDou = new();
            if (doubles.Count > 0) 
            {
                var artYear = DenseMatrix.OfColumns(doubles);
                //var rc = artYear.RowCount;
                var cc = artYear.ColumnCount;
                for (int i = 0; i < artYear.RowCount; i++)
                {
                    retDou.Add(artYear.SubMatrix(i, 1, 0, cc).ColumnSums().Sum());
                }
            }
            return retDou;
        }

        /// <summary>
        /// 计算一年中每周的数据
        /// </summary>
        /// <param name="doubles"></param>
        /// <param name="dateTime"></param>
        /// <returns></returns>
        public static List<double> weekDoubleMerge(List<List<double>> doubles, DateTimeOffset dateTime)
        {
            List<double> weekTrend = new();
            if (doubles.Count > 0)
            {
                int year = dateTime.Year;
                int dayOfweek = (int)DateTimeOffset.Parse($"{year}-1-1").DayOfWeek;
                int currentTime = dateTime.DayOfYear / 7 + 1;
                int currentTime1 = dateTime.DayOfYear / 7;
                int days = (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) ? days = 366 : days = 365;

                var bmatrix = DenseMatrix.OfColumns(doubles);

                //开学第一周周内开课                   
                if (dayOfweek == 0)
                {
                    dayOfweek = 7;
                }
                //第一周多少天
                var dd = 7 - dayOfweek + 1;
                //一年有几周
                int sweeks = days / 7;
                //查询天数
                int dayYear = 0;
                if (currentTime > 0)
                {
                    for (int i = 0; i < currentTime; i++)
                    {
                        if (i == 0)
                        {
                            var bsum = bmatrix.SubMatrix(dayYear, dd, 0, bmatrix.ColumnCount).ColumnSums().Sum();
                            dayYear += dd;
                            //weeks.Add(i, bsum);
                            weekTrend.Add(bsum);
                        }
                        else
                        {
                            var bsum = bmatrix.SubMatrix(dayYear, 7, 0, bmatrix.ColumnCount).ColumnSums().Sum();
                            dayYear += 7;
                            //weeks.Add(i, bsum);
                            weekTrend.Add(bsum);
                        }
                    }
                }
                //最后一周是否有余
                int stary = days - dayYear;
                if (stary > 0 && stary < 7)
                {
                    var bsum = bmatrix.SubMatrix(dayYear, stary - 1, 0, bmatrix.ColumnCount).ColumnSums().Sum();
                    //weeks.Add((sweeks + 1), bsum);
                    weekTrend.Add(bsum);
                }
            }
            return weekTrend;
        }

    }
}