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;
using System.ComponentModel.DataAnnotations;
using TMSDAL.CustomCode.ProgrammeCatalogue;
using TMSDAL.DTO.ProgrammeCatalogue;

namespace TMSBLL.ProgrammeCatalogue
{
    public class ProgrammeCatalogueBLL : IProgrammeCatalogueBLL
    {
        private readonly IProgrammeCatalogueDAL _DAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public ProgrammeCatalogueBLL(IProgrammeCatalogueDAL dal, AutoNumber autoNumber, IValidation validation)
        {
            _DAL = dal;
            _AutoNumber = autoNumber;
            _Validation = validation;
        }

        public async Task<string> GetProgrammeCatalogue(byte? isActive, byte? programmeType, int? domainId, int page, int size, LoginDTO loginDTO)
        {
            try { return await _DAL.GetProgrammeCataloguePaged(isActive, programmeType, domainId, page, size, loginDTO); }
            catch (Exception) { throw; }
        }

        public async Task<string> GetProgrammeCatalogueById(int programmeId, LoginDTO loginDTO)
        {
            try
            {
                var result = await _DAL.GetProgrammeCatalogue(programmeId, loginDTO);
                return JsonConvert.SerializeObject(result);
            }
            catch (Exception) { throw; }
        }

        public async Task<string> GetProgrammeCatalogueList(LoginDTO loginDTO)
        {
            try { return await _DAL.GetProgrammeCatalogueList(loginDTO); }
            catch (Exception) { throw; }
        }

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

        public async Task<string> SaveProgrammeCatalogue(ProgrammeCatalogueDTO dto, LoginDTO loginDTO)
        {
            if (dto == null) throw new ArgumentNullException(nameof(dto));
            AutoNumberDTO? autoNumberDTO = null;

            try
            {
                await _Validation.NotEmpty(dto.ProgrammeCode, nameof(dto.ProgrammeCode));
                await _Validation.NotEmpty(dto.ProgrammeTitle, nameof(dto.ProgrammeTitle));
                if (dto.DurationHours <= 0)
                    throw new ValidationException("DurationHours must be greater than 0.");

                dto.TenantId = loginDTO.ClientId;
                dto.ModifiedById = loginDTO.UserId;
                dto.ModifiedOn = DateTime.UtcNow;

                if (dto.ProgrammeId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(1, "TRAININGPROGRAMME", loginDTO);
                    dto.ProgrammeId = autoNumberDTO.StartNumber;
                    dto.CreatedById = loginDTO.UserId;
                    dto.CreatedOn = DateTime.UtcNow;

                    await _DAL.SaveProgrammeCatalogue(dto, loginDTO);
                    return string.Format(SuccessResponse.SaveSuccessWithCodeAndName, dto.ProgrammeCode, dto.ProgrammeTitle);
                }
                else
                {
                    await _DAL.UpdateProgrammeCatalogue(dto, loginDTO);
                    return string.Format(SuccessResponse.UpdateSuccessWithCodeAndName, dto.ProgrammeCode, dto.ProgrammeTitle);
                }
            }
            catch (ValidationException vex) { throw new Exception(vex.Message); }
            catch (Exception)
            {
                if (autoNumberDTO != null && dto.ProgrammeId > 0)
                    await _AutoNumber.RollbackAutoNumber("TRAININGPROGRAMME", dto.ProgrammeId, loginDTO);
                throw;
            }
        }

        public async Task<string> DeleteProgrammeCatalogue(int programmeId, LoginDTO loginDTO)
        {
            try { return await _DAL.DeleteProgrammeCatalogue(programmeId, loginDTO); }
            catch (Exception) { throw; }
        }
    }
}