using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BLL 
{
    public class TwArrivalStatisticsService
    {
        public static IEnumerable GetStatistics(string projectid,string materialCode)
        {
            using (Model.SGGLDB db = new Model.SGGLDB(Funs.ConnString))
            {
                var NeedOutMateriaList = from x in db.HJGL_PipeLineMat
                                     join y in db.HJGL_MaterialCodeLib on x.MaterialCode equals y.MaterialCode
                                     join z in db.HJGL_Pipeline on x.PipelineId equals z.PipelineId
                                     where  z.ProjectId == projectid  && (string.IsNullOrEmpty(materialCode) || x.MaterialCode .Contains( materialCode))
                                     group x by x.MaterialCode
                 into g
                                     select new
                                     {
                                         g.Key,
                                         NeedNum = g.Sum(x => x.Number) ?? 0, 
                                     };

                var RealInMateriaList = from x in db.Tw_InputDetail
                                        join y in db.HJGL_MaterialCodeLib on x.MaterialCode equals y.MaterialCode
                                        group x by x.MaterialCode
                 into g
                                        where   (string.IsNullOrEmpty(materialCode) || g.Key.Contains( materialCode))
                                        select new
                                        {
                                            g.Key,
                                            RealNum = g.Sum(x => x.ActNum) ?? 0,
                                        };

                var StatisticsList =from x in NeedOutMateriaList
                                    join y in RealInMateriaList on x.Key equals y.Key into gg
                                    from y in gg.DefaultIfEmpty()
                                    join z in db.HJGL_MaterialCodeLib on x.Key equals z.MaterialCode into zz
                                    from z in zz.DefaultIfEmpty() 
                                    select new
                                    {
                                        MaterialCode = x.Key,
                                        NeedNum = x.NeedNum,
                                        RealNum = y==null?0:y.RealNum,
                                        MaterialName = z.MaterialName,
                                        MaterialSpec=z.MaterialSpec,
                                        MaterialUnit=z.MaterialUnit,
                                    };
                return StatisticsList.ToList();
            }
        }
    }    
 
}