using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using AdminDAL.CustomCode.Calendar;
using AdminDAL.DTO.Calendar;
using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.ResponseStandard;
using GB5Shared.Validation;

namespace AdminBLL.Calendar
{
    public class CalendarBLL : ICalendarBLL
    {
        private readonly ICalendarDAL _CalendarDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;
        public CalendarBLL(ICalendarDAL ICalendarDAL, AutoNumber AutoNumber, IValidation Validation)
        {
            _CalendarDAL = ICalendarDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

        public async Task<string> GetCalendar(int CalendarId, LoginDTO LoginDTO)
        {
            try
            {
                return await _CalendarDAL.GetCalendar(CalendarId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> SaveCalendar(CalendarDTO CalendarDTO, LoginDTO loginDTO)
        {
            if (CalendarDTO == null)
                throw new ArgumentNullException(nameof(CalendarDTO));

            AutoNumberDTO? autoNumberDTO = null;
            try
            {
                await _Validation.NotEmpty(CalendarDTO.CalendarCode, nameof(CalendarDTO.CalendarCode));
                await _Validation.NotEmpty(CalendarDTO.CalendarName, nameof(CalendarDTO.CalendarName));
                CalendarDTO.CalendarModifiedById = loginDTO.UserId;
                CalendarDTO.CalendarModifiedOn = DateTime.UtcNow;

                int count = 1;
                if (CalendarDTO.CalendarId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(count, "CALENDAR", loginDTO);
                    CalendarDTO.CalendarId = autoNumberDTO.StartNumber;

                    CalendarDTO.CalendarCreatedById = loginDTO.UserId;
                    CalendarDTO.CalendarCreatedOn = DateTime.UtcNow;

                    if (CalendarDTO.CalendarDetailArray != null)
                    {
                        foreach (var child in CalendarDTO.CalendarDetailArray)
                        {
                            child.CalendarDetailId = CalendarDTO.CalendarId++;
                            child.CalendarId = CalendarDTO.CalendarId;
                        }
                    }

                    await _CalendarDAL.SaveCalendar(CalendarDTO, loginDTO);

                    return $"Calendar saved successfully with CalendarId {CalendarDTO.CalendarId}.";
                }
                else
                {
                    await _CalendarDAL.UpdateCalendar(CalendarDTO, loginDTO);

                    return $"Calendar updated successfully with CalendarId {CalendarDTO.CalendarId}.";
                }
            }
            catch
            {
                if (autoNumberDTO != null && CalendarDTO.CalendarId > 0)
                    await _AutoNumber.RollbackAutoNumber("CALENDAR", CalendarDTO.CalendarId, loginDTO);

                throw;
            }
        }

        public async Task<Result<string>> DeleteCalendar(int CalendarId, LoginDTO LoginDTO)
        {
            try
            {
                return await _CalendarDAL.DeleteCalendar(CalendarId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> GetSelectListCalendar(CriteriaDTO criteriaDTO, LoginDTO loginDTO)
        {
            try
            {
                return await _CalendarDAL.GetSelectListCalendar(criteriaDTO, loginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}