using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using CRMDAL.CustomCode.SLA;
using CRMDAL.DTO.SLA;
using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.Resource.Response;
using GB5Shared.Validation;
using Newtonsoft.Json;

namespace CRMBLL.SLA
{
    public class SLABLL : ISLABLL
    {
        private readonly ISLADAL _SLADAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;


        public SLABLL(ISLADAL SLADAL, AutoNumber AutoNumber, IValidation Validation)
        {
            _SLADAL = SLADAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

        public async Task<string> GetSLA(int SLAId, LoginDTO LoginDTO)
        {
            try
            {
                return await _SLADAL.GetSLA(SLAId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

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

        public async Task<string> SaveSLA(SLADTO SLADTO, LoginDTO LoginDTO)
        {
            if (SLADTO == null)
                throw new ArgumentNullException(nameof(SLADTO));
            AutoNumberDTO? autoNumberDTO = null;
            try
            {
                await _Validation.NotEmpty(SLADTO.SLACode, nameof(SLADTO.SLACode));
                await _Validation.NotEmpty(SLADTO.SLAName, nameof(SLADTO.SLAName));
                SLADTO.SLAModifiedById = LoginDTO.UserId;
                SLADTO.SLAModifiedOn = DateTime.UtcNow;
                bool isNew = SLADTO.SLAId == 0;
                if (isNew)
                {
                    int detailCount = SLADTO.SLADetailArray?.Count ?? 0;
                    int totalRequired = 1 + detailCount;
                    autoNumberDTO = await _AutoNumber.GetNumberAsync(totalRequired, "SERVICELEVELAGREEMENT", LoginDTO);
                    int nextId = autoNumberDTO.StartNumber;
                    SLADTO.SLAId = nextId++;
                    SLADTO.SLACreatedById = LoginDTO.UserId;
                    SLADTO.SLACreatedOn = DateTime.UtcNow;
                    if (SLADTO.SLADetailArray?.Count > 0)
                    {
                        foreach (var detail in SLADTO.SLADetailArray)
                        {
                            detail.SLADetailId = nextId++;
                            detail.SLAId = SLADTO.SLAId;
                        }
                    }
                    await _SLADAL.SaveSLA(SLADTO, LoginDTO);
                    return $"{SuccessResponse.SaveSuccess}";
                }
                else
                {
                    await _SLADAL.UpdateSLA(SLADTO, LoginDTO);
                    return $"{SuccessResponse.UpdateSuccess}";
                }
            }
            catch
            {
                if (autoNumberDTO != null && SLADTO.SLAId > 0)
                {
                    await _AutoNumber.RollbackAutoNumber("SERVICELEVELAGREEMENT", autoNumberDTO.StartNumber, LoginDTO);
                }
                throw;
            }
        }

        public async Task<string> DeleteSLA(int SLAId, LoginDTO LoginDTO)
        {
            try
            {
                var detailsResult = await _SLADAL.DeleteSLADetail(SLAId, LoginDTO);

                if (detailsResult <= 0)
                    return $"{ErrorResponse.DeleteNotFoundMessage}";

                var parentResult = await _SLADAL.DeleteSLA(SLAId, LoginDTO);

                if (parentResult <= 0)
                    return $"{ErrorResponse.DeleteNotFoundMessage}";

                return $"{SuccessResponse.DeleteSuccessMessage}";
            }
            catch (Exception ex)
            {
                throw new Exception($"Error While Deleting SLA Id {SLAId}", ex);
            }
        }
    }
}