using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using AdminDAL.DTO.Datawarehouse;
using AdminDAL.Query.DataWareHouse;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.QueryExecutor;
using GB5Shared.Validation;
using Newtonsoft.Json;

namespace AdminDAL.CustomCode.DataWareHouse
{
    public class DataWareHouseDAL : IDataWareHouseDAL
    {
        private readonly IQueryExecutor _QueryExecutor;
        private readonly IValidation _Validation;

        public DataWareHouseDAL(IQueryExecutor IQueryExecutor, IValidation IValidation)
        {
            _QueryExecutor = IQueryExecutor;
            _Validation = IValidation;
        }

        public async Task<string> GetDataWareHouse(int DataWareHouseId, LoginDTO LoginDTO)
        {
            try
            {
                string sql = DataWareHouseQB.GET_DATAWAREHOUSE;
                var parameters = new { datawarehouseid = DataWareHouseId };

                var DataWareHouseDict = new Dictionary<int, DataWareHouseDTO>();

                var result = await _QueryExecutor.QueryMultiMapAsync<DataWareHouseDTO, DataWareHouseDetailDTO, DataWareHouseDTO>(
                    LoginDTO,
                    sql,
                    (parent, child) =>
                    {
                        if (!DataWareHouseDict.TryGetValue(parent.DataWareHouseId, out var existingParent))
                        {
                            existingParent = parent;
                            existingParent.DataWareHouseDetailArray = new List<DataWareHouseDetailDTO>();
                            DataWareHouseDict[parent.DataWareHouseId] = existingParent;
                        }

                        if (child != null && child.DataWareHouseDetailId != 0)
                        {
                            existingParent.DataWareHouseDetailArray.Add(child);
                        }

                        return existingParent;
                    },
                    parameters,
                    splitOn: "DataWareHouseDetailId"
                );

                var finalResult = DataWareHouseDict.Values.FirstOrDefault();
                return JsonConvert.SerializeObject(finalResult);
            }
            catch (Exception ex)
            {
                throw new Exception($"Failed to retrieve DataWareHouse data: {ex.Message}", ex);
            }
        }

        public async Task<string> GetSelectListDataWareHouse(CriteriaDTO CriteriaDTO, LoginDTO LoginDTO)
        {
            try
            {
                string SQL = DataWareHouseQB.GET_SELECTLIST_DATAWAREHOUSE;
                var Result = await _QueryExecutor.QueryAsync<DatawarehousePicklistDTO>(LoginDTO, SQL, null!);
                string Json = JsonConvert.SerializeObject(Result);
                return Json;
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> SaveDataWareHouse(DataWareHouseDTO dto, LoginDTO login, CancellationToken ct)
        {
            await using var tx = await _QueryExecutor.BeginTransactionAsync(login).ConfigureAwait(false);
            try
            {
                var savedId = await _QueryExecutor.ExecuteScalarAsync<int>(
                    login,
                    DataWareHouseQB.SAVE_DATAWAREHOUSE,
                    new
                    {
                        dto.DataWareHouseId,
                        dto.DataWareHouseCode,
                        dto.DataWareHouseName,
                        dto.DataWareHouseObjectNames,
                        dto.DataWareHouseUpdateFrequency,
                        dto.DataWareHouseSortOrder,
                        dto.DataWareHouseStatus,
                        dto.DataWareHouseSourceType,
                        dto.DataWareHouseRemarks,
                        dto.DataWareHouseCreatedById,
                        dto.DataWareHouseModifiedById
                    },
                    transaction: tx).ConfigureAwait(false);

                await _QueryExecutor.ExecuteAsync(
                    login,
                    DataWareHouseQB.DELETE_DATAWAREHOUSE_DETAILS,
                    new { DataWareHouseId = savedId },
                    transaction: tx,
                    cancellationToken: ct).ConfigureAwait(false);

                if (dto.DataWareHouseDetailArray?.Count > 0)
                {
                    foreach (var detail in dto.DataWareHouseDetailArray)
                    {
                        await _QueryExecutor.ExecuteAsync(
                            login,
                            DataWareHouseQB.SAVE_DATAWAREHOUSE_DETAIL,
                            new
                            {
                                DataWareHouseId = savedId,
                                detail.DataWareHouseDetailSlNo,
                                detail.DataWareHouseDetailDescription,
                                detail.DataWareHouseDetailRunOrder,
                                detail.DataWareHouseDetailQuery,
                                detail.DataWareHouseDetailIsRuntimeRequired
                            },
                            transaction: tx,
                            cancellationToken: ct).ConfigureAwait(false);
                    }
                }

                await tx.CommitAsync(ct).ConfigureAwait(false);
                return JsonConvert.SerializeObject(savedId);
            }
            catch
            {
                await tx.RollbackAsync(ct).ConfigureAwait(false);
                throw;
            }
        }

        public async Task<string> DeleteDataWareHouse(int dataWareHouseId, LoginDTO login, CancellationToken ct)
        {
            await using var tx = await _QueryExecutor.BeginTransactionAsync(login).ConfigureAwait(false);
            try
            {
                await _QueryExecutor.ExecuteAsync(
                    login,
                    DataWareHouseQB.DELETE_DATAWAREHOUSE_DETAILS,
                    new { DataWareHouseId = dataWareHouseId },
                    transaction: tx,
                    cancellationToken: ct).ConfigureAwait(false);

                await _QueryExecutor.ExecuteAsync(
                    login,
                    DataWareHouseQB.DELETE_DATAWAREHOUSE,
                    new { DataWareHouseId = dataWareHouseId },
                    transaction: tx,
                    cancellationToken: ct).ConfigureAwait(false);

                await tx.CommitAsync(ct).ConfigureAwait(false);
                return JsonConvert.SerializeObject(dataWareHouseId);
            }
            catch
            {
                await tx.RollbackAsync(ct).ConfigureAwait(false);
                throw;
            }
        }
    }
}