using HL_FristAidPlatform_Help;
using HL_FristAidPlatform_IDataBase;
using HL_FristAidPlatform_Models;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HL_FristAidPlatform_DataBase
{
    public class T_Service_Trauma_HospitalizationTimeDB: BaseDB, IT_Service_Trauma_HospitalizationTime
    {
        public SqlSugarClient db = GetClient();


        public List<TraumaHospitalizationTimeModel> GetHospitalizationTimeStatistics(string hospitalGuid, string startTime, string endTime, int flag)
        {
            List<TraumaHospitalizationTimeModel> list = new List<TraumaHospitalizationTimeModel>();

            int Month = (Convert.ToDateTime(endTime).Year - Convert.ToDateTime(startTime).Year) * 12 + (Convert.ToDateTime(endTime).Month - Convert.ToDateTime(startTime).Month);
            List<DateTime> monthList = new List<DateTime>();
            for (int i = 0; i < Month; i++)
            {
                string res = Convert.ToDateTime(startTime).AddMonths(i).Year + "-" + GetMonthZero(Convert.ToDateTime(startTime).AddMonths(i).Month) + "-01";
                DateTime dt = Convert.ToDateTime(res);
                monthList.Add(dt.AddDays(1 - dt.Day));
            }
            
            //严重创伤病人总数及住院天数
            var oneClass = db.Queryable<T_Service_Patient, T_Service_Trauma_ReceiveInfo, T_Service_Trauma_ISSAIS>((a, b, c) => new JoinQueryInfos(
                   JoinType.Left, a.GUID == b.PatientGuid,
                   JoinType.Left, a.GUID == c.PatientGuid))
               .Where((a, b, c) => a.HospitalGuid == hospitalGuid && a.SystemModuleID == 4 && a.DeleteFlag == 0 && c.Grave == 1
               && a.CreationDate >= SqlFunc.ToDate(startTime) && a.CreationDate <= SqlFunc.ToDate(endTime))
               .Select((a, b, c) =>new
               {
                   CreationDate=a.CreationDate,
                   GUID=a.GUID,
                   HospitalizationDays=b.HospitalizationDays,
                   Grave =c.Grave,
               })
               .ToList();

            //严重创伤病人ICU住院天数
            var twoClass = db.Queryable<T_Service_Patient, T_Service_Trauma_ISSAIS, T_Service_Trauma_ICUList>((a, b, c) => new JoinQueryInfos(
                   JoinType.Left, a.GUID == b.PatientGuid,
                   JoinType.Left, a.GUID == c.PatientGuid))
               .Where((a, b, c) => a.HospitalGuid == hospitalGuid && a.SystemModuleID == 4 && a.DeleteFlag == 0 && b.Grave == 1
               && a.CreationDate >= SqlFunc.ToDate(startTime) && a.CreationDate <= SqlFunc.ToDate(endTime))
               .Select((a, b, c) =>new 
               {
                   CreationDate = a.CreationDate,
                   GUID = a.GUID,

                   Grave = b.Grave,
                   ICUDays=c.ICUDays

               })
               .ToList();

            if (oneClass != null)
            {
                for (int i = 0; i < monthList.Count; i++)
                {
                    TraumaHospitalizationTimeModel model = new TraumaHospitalizationTimeModel();
                    model.Month = monthList[i].ToString("yyyy-MM");

                    model.AvgHospitalizationDays = "0.0";
                    var temponeClass = oneClass.Where(j => j.CreationDate >= SqlFunc.ToDate(monthList[i].ToString()) && j.CreationDate <= Convert.ToDateTime(SqlFunc.ToDate(monthList[i].ToString() + "-01").AddMonths(1)) ).ToList();
                    if (temponeClass.Count > 0)
                    {
                        double a = 0;
                        var temp = temponeClass.Where(i => !SqlFunc.IsNullOrEmpty(i.HospitalizationDays));
                        if (temp != null)
                        {
                            a = (double)temp.Sum(i => SqlFunc.ToInt64((i.HospitalizationDays))) / (double)temponeClass.Count;
                        }
                        model.AvgHospitalizationDays = a.ToString("#0.0");
                    }
                    

                    model.AvgICUDays = "0.0";
                    if (twoClass != null)
                    {
                        var temptwoClass = twoClass.Where(j => j.CreationDate >= SqlFunc.ToDate(monthList[i].ToString()) && j.CreationDate <= Convert.ToDateTime(SqlFunc.ToDate(monthList[i].ToString() + "-01").AddMonths(1))).ToList();

                        if (temponeClass.Count > 0)
                        {
                            double b = 0;
                            var temp = temptwoClass.Where(i => !SqlFunc.IsNullOrEmpty(i.ICUDays));
                            if (temp != null)
                            {
                                b = (double)temp.Sum(i => SqlFunc.ToInt64((i.ICUDays))) / (double)temponeClass.Count;
                            }
                            model.AvgICUDays = b.ToString("#0.0");
                        }
                    }

                    list.Add(model);
                }
            }
            return list;
        }


        /// <summary>
        /// 计算月份
        /// </summary>
        /// <param name="month"></param>
        /// <returns></returns>
        private string GetMonthZero(int month)
        {
            if (month < 10)
            {
                return "0" + month;
            }
            else
            {
                return month.ToString();
            }
        }
    }
}