using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.GB5Exception;
using GB5Shared.QueryExecutor;
using GB5Shared.Resource.Response;
using GB5Shared.Validation;
using MMDAL.DTO.MaterialAccount;
using MMDAL.Query.MaterialAccount;
using Newtonsoft.Json;

namespace MMDAL.CustomCode.MaterialAccount
{
    public class MaterialAccountDAL : IMaterialAccountDAL
    {
        private readonly IQueryExecutor _QueryExecutor;
        private readonly IValidation _Validation;

        public MaterialAccountDAL(IQueryExecutor QueryExecutor, IValidation Validation)
        {
            _QueryExecutor = QueryExecutor;
            _Validation = Validation;
        }

        public async Task<string> GetMaterialAccount(int MaterialAccountId, LoginDTO LoginDTO)
        {
            try
            {
                var sql = MaterialAccountQB.GET_MATERIALACCOUNT;
                var parameters = new { materialaccountid = MaterialAccountId };

                var MaterialAccountDict = new Dictionary<int, MaterialAccountDTO>();

                var result = await _QueryExecutor.QueryMultiMapAsync<MaterialAccountDTO, MaterialAccountDetailDTO, MaterialAccountDTO>(
                    LoginDTO,
                    sql,
                    (parent, child) =>
                    {
                        if (!MaterialAccountDict.TryGetValue(parent.MaterialAccountId, out var existingParent))
                        {
                            existingParent = parent;
                            existingParent.MaterialAccountDetailArray = new List<MaterialAccountDetailDTO>();
                            MaterialAccountDict[parent.MaterialAccountId] = existingParent;
                        }

                        if (child != null && child.MaterialAccountDetailId != 0)
                        {
                            existingParent.MaterialAccountDetailArray.Add(child);
                        }

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

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


        public async Task<int> SaveMaterialAccount(MaterialAccountDTO MaterialAccountDTO, LoginDTO LoginDTO)
        {
            try
            {
                // SQL Server queries only
                string MaterialAccountSql = MaterialAccountQB.SAVE_MATERIALACCOUNT;
                string detailSql = MaterialAccountQB.SAVE_MATERIALACCOUNT_DETAIL;
                string countSql = MaterialAccountQB.GET_MATERIALACCOUNT_COUNT;

                // DUPLICATE CHECK
                int existingCount = await _QueryExecutor.ExecuteScalarAsync<int>(LoginDTO, countSql,
                    new
                    {
                        MaterialAccountDTO.MaterialAccountId
                    });

                if (existingCount > 0)
                {
                    throw new MethodNotAllowedException(
                        "Duplicate MaterialAccount record exists."
                    );
                }

                // TRANSACTION BUILD
                var statements = new List<(string sql, object param)>
        {
            (MaterialAccountSql, MaterialAccountDTO)
        };

                if (MaterialAccountDTO.MaterialAccountDetailArray?.Count > 0)
                {
                    foreach (var detail in MaterialAccountDTO.MaterialAccountDetailArray)
                    {
                        detail.MaterialAccountId = MaterialAccountDTO.MaterialAccountId;
                        statements.Add((detailSql, detail));
                    }
                }

                await _QueryExecutor.ExecuteInTransactionAsync(LoginDTO, statements);

                return MaterialAccountDTO.MaterialAccountId;
            }
            catch (Exception ex)
            {
                throw new Exception(
                    $"{ErrorResponse.SaveErrorMessage}: {ex.Message}", ex);
            }
        }


        public async Task<int> UpdateMaterialAccount(MaterialAccountDTO MaterialAccountDTO, LoginDTO login)
        {
            var statements = new List<(string sql, object param)>();
            statements.Add((MaterialAccountQB.UPDATE_MATERIALACCOUNT, MaterialAccountDTO));

            foreach (var d in MaterialAccountDTO.MaterialAccountDetailArray)
            {
                d.MaterialAccountId = MaterialAccountDTO.MaterialAccountId;
                if (d.MaterialAccountDetailId == 0)
                    statements.Add((MaterialAccountQB.SAVE_MATERIALACCOUNT_DETAIL, d));
                else
                    statements.Add((MaterialAccountQB.UPDATE_MATERIALACCOUNT_DETAIL, d));
            }

            await _QueryExecutor.ExecuteInTransactionAsync(login, statements);
            return MaterialAccountDTO.MaterialAccountId;
        }

        public async Task<int> DeleteMaterialAccountDetail(int MaterialAccountId, LoginDTO LoginDTO)
        {
            try
            {
                return await _QueryExecutor.ExecuteAsync(
                    LoginDTO,
                    MaterialAccountQB.DELETE_MATERIALACCOUNT_DETAIL,
                    new { materialaccountid = MaterialAccountId }
                );
            }
            catch (Exception ex)
            {
                throw new Exception($"Error while deleting MaterialAccount detail for ID {MaterialAccountId}", ex);
            }
        }


        public async Task<int> DeleteMaterialAccount(int MaterialAccountId, LoginDTO LoginDTO)
        {
            try
            {
                return await _QueryExecutor.ExecuteAsync(
                    LoginDTO,
                    MaterialAccountQB.DELETE_MATERIALACCOUNT,
                    new { materialaccountid = MaterialAccountId }
                );
            }
            catch (Exception ex)
            {
                throw new Exception($"Error while deleting MaterialAccount with ID {MaterialAccountId}", ex);
            }
        }

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