using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using FrameworkDAL.CustomCode.Dataset;
using FrameworkDAL.DTO.Dataset;
using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.Resource.Response;
using GB5Shared.ResponseStandard;
using GB5Shared.Validation;

namespace FrameworkBLL.Dataset
{
    public class DatasetBLL : IDatasetBLL
    {
        private readonly IDatasetDAL _DatasetDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public DatasetBLL(IDatasetDAL DatasetDAL, AutoNumber AutoNumber, IValidation Validation)
        {
            _DatasetDAL = DatasetDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

        public async Task<string> GetDataset(int DatasetId, LoginDTO LoginDTO)
        {
            try
            {
                return await _DatasetDAL.GetDataset(DatasetId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

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

            AutoNumberDTO? autoNumberDTO = null;
            try
            {
                await _Validation.NotEmpty(DatasetDTO.DatasetCode, nameof(DatasetDTO.DatasetCode));
                await _Validation.NotEmpty(DatasetDTO.DatasetName, nameof(DatasetDTO.DatasetName));
                DatasetDTO.DatasetModifiedById = loginDTO.UserId;
                DatasetDTO.DatasetModifiedOn = DateTime.UtcNow;

                int count = 1;
                if (DatasetDTO.DatasetId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(count, "DATASET", loginDTO);
                    DatasetDTO.DatasetId = autoNumberDTO.StartNumber;

                    DatasetDTO.DatasetCreatedById = loginDTO.UserId;
                    DatasetDTO.DatasetCreatedOn = DateTime.UtcNow;

                    if (DatasetDTO.DatasetDetailArray != null)
                    {
                        foreach (var child in DatasetDTO.DatasetDetailArray)
                        {
                            child.DatasetDetailId = DatasetDTO.DatasetId++;
                            child.DatasetId = DatasetDTO.DatasetId;
                        }
                    }

                    await _DatasetDAL.SaveDataset(DatasetDTO, loginDTO);

                    return $"Dataset saved successfully with DatasetId {DatasetDTO.DatasetId}.";
                }
                else
                {
                    await _DatasetDAL.UpdateDataset(DatasetDTO, loginDTO);

                    return $"Dataset updated successfully with DatasetId {DatasetDTO.DatasetId}.";
                }
            }
            catch
            {
                if (autoNumberDTO != null && DatasetDTO.DatasetId > 0)
                    await _AutoNumber.RollbackAutoNumber("DATASET", DatasetDTO.DatasetId, loginDTO);

                throw;
            }
        }

        public async Task<Result<string>> DeleteDataset(int DatasetId, LoginDTO LoginDTO)
        {
            try
            {
                return await _DatasetDAL.DeleteDataset(DatasetId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> GetSelectListDataset(int FirstNumber, int MaxResult, CriteriaDTO CriteriaDTO, LoginDTO LoginDTO)
        {
            try
            {
                return await _DatasetDAL.GetSelectListDataset(FirstNumber, MaxResult, CriteriaDTO, LoginDTO);
            }
            catch (Exception ex)
            {
                throw new Exception("Error in GetSelectListDataset", ex);
            }
        }
    }
}