using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EMIS.DataLogic.Common.Students;
using Bowin.Common.Linq.Entity;
using EMIS.ViewModel.Students;
using System.Linq.Expressions;
using EMIS.Entities;
using EMIS.ViewModel;

namespace EMIS.CommonLogic.Students
{
    public class StudentExperienceServices : BaseServices, IStudentExperienceServices
    {
        public StudentExperienceDAL StudentExperienceDAL { get; set; }

        public IGridResultSet<StudentExperienceView> GetTopStudentExperienceGridView(Guid userID, int rowCount, int? pageIndex, int? pageSize)
        {
            Expression<Func<CF_StudentExperience, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE
                                                                    && x.UserID == userID);

            var result = this.StudentExperienceDAL.GetStudentExperienceViewQueryable(exp).Take(rowCount).ToList();

            var newRowCount = rowCount - result.Count;
            for (var i = 0; i < newRowCount; i++)
            {
                result.Add(new StudentExperienceView 
                {
                    StudentExperienceID = Guid.NewGuid(),
                    UserID = userID
                });
            }

            return new GridResultSet<StudentExperienceView> { rows = result, total = result.Count };
        }

        public void Save(Guid userID, IList<StudentExperienceView> studentExperienceViewList)
        {
            UnitOfWork.Remove<CF_StudentExperience>(x => x.UserID == userID);
            var studentExperienceList = (from experience in studentExperienceViewList
                                         select new CF_StudentExperience
                                         {
                                             StudentExperienceID = Guid.NewGuid(),
                                             UserID = userID,
                                             StartYear = experience.StartYear,
                                             StartMonth = experience.StartMonth,
                                             EndYear = experience.EndYear,
                                             EndMonth = experience.EndMonth,
                                             Experience = experience.Experience
                                         }).ToList();
            studentExperienceList.ForEach(x => this.SetNewStatus(x));
            UnitOfWork.AddRange(studentExperienceList);
            UnitOfWork.Commit();
        }
    }
}