using System.Data.Common;
using Dapper;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.QueryExecutor;
using GB5Shared.Resource.Response;
using Newtonsoft.Json;
using PayRollDAL.DTO.NOCList;
using PayRollDAL.Query.NOCList;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;

namespace PayRollDAL.CustomeCode.NOCList
{
    public class NOCListDAL : INOCListDAL
    {
        private readonly IQueryExecutor _QueryExecutor;

        public NOCListDAL(IQueryExecutor queryExecutor)
        {
            _QueryExecutor = queryExecutor;
        }

        // ── Get header + all detail rows ─────────────────────────────────

        public async Task<NOCListDTO> GetNOCList(int NOCListId, LoginDTO LoginDTO)
        {
            var param = new { noclistid = NOCListId };

            var header = await _QueryExecutor.QuerySingleAsync<NOCListDTO>(
                LoginDTO, NOCListQB.GET_NOCLIST, param).ConfigureAwait(false);

            if (header != null)
            {
                var details = await _QueryExecutor.QueryAsync<NOCListDetailDTO>(
                    LoginDTO, NOCListQB.GET_NOCLISTDETAIL, param).ConfigureAwait(false);

                header.NOCListDetailArray = details?.ToList() ?? new List<NOCListDetailDTO>();
            }

            return header!;
        }

        // ── Insert header + detail rows (transaction provided by BLL) ────

        public async Task<int> SaveNOCList(NOCListDTO NOCListDTO, LoginDTO LoginDTO, DbTransaction DbTransaction)
        {
            int rows = await _QueryExecutor.ExecuteAsync(
                LoginDTO, NOCListQB.SAVE_NOCLIST, NOCListDTO, DbTransaction).ConfigureAwait(false);

            if (rows > 0 && NOCListDTO.NOCListDetailArray?.Count > 0)
            {
                short slNo = 1;
                foreach (var detail in NOCListDTO.NOCListDetailArray)
                {
                    detail.NOCListId = NOCListDTO.NOCListId;
                    detail.NOCListDetailSlNo = slNo++;
                    await _QueryExecutor.ExecuteAsync(
                        LoginDTO, NOCListQB.SAVE_NOCLISTDETAIL, detail, DbTransaction).ConfigureAwait(false);
                }
            }

            return rows;
        }

        // ── Update header + replace detail rows (transaction provided by BLL) ─

        public async Task<int> UpdateNOCList(NOCListDTO NOCListDTO, LoginDTO LoginDTO, DbTransaction DbTransaction)
        {
            int rows = await _QueryExecutor.ExecuteAsync(
                LoginDTO, NOCListQB.UPDATE_NOCLIST, NOCListDTO, DbTransaction).ConfigureAwait(false);

            // GB4 parity: DeleteNOCListDetails then re-insert (NOCListBLL.SaveNOCList update path)
            await _QueryExecutor.ExecuteAsync(
                LoginDTO, NOCListQB.DELETE_NOCLISTDETAIL,
                new { noclistid = NOCListDTO.NOCListId }, DbTransaction).ConfigureAwait(false);

            if (NOCListDTO.NOCListDetailArray?.Count > 0)
            {
                short slNo = 1;
                foreach (var detail in NOCListDTO.NOCListDetailArray)
                {
                    detail.NOCListId = NOCListDTO.NOCListId;
                    detail.NOCListDetailSlNo = slNo++;
                    await _QueryExecutor.ExecuteAsync(
                        LoginDTO, NOCListQB.SAVE_NOCLISTDETAIL, detail, DbTransaction).ConfigureAwait(false);
                }
            }

            return rows;
        }

        // ── Delete header (details removed explicitly, matching GB4 order) ─

        public async Task<string> DeleteNOCList(int NOCListId, LoginDTO LoginDTO)
        {
            await _QueryExecutor.ExecuteAsync(
                LoginDTO, NOCListQB.DELETE_NOCLISTDETAIL,
                new { noclistid = NOCListId }).ConfigureAwait(false);

            int result = await _QueryExecutor.ExecuteAsync(
                LoginDTO, NOCListQB.DELETE_NOCLIST,
                new { noclistid = NOCListId }).ConfigureAwait(false);

            return result > 0 ? SuccessResponse.DeleteSuccessMessage : ErrorResponse.DeleteNotFoundMessage;
        }

        // ── Picklist for grid ─────────────────────────────────────────────

        public async Task<string> GetSelectListNOCList(int FirstNumber, int MaxResult, CriteriaDTO CriteriaDTO, LoginDTO LoginDTO)
        {
            string sql = NOCListQB.GET_SELECTLIST_NOCLIST;
            var parameters = new DynamicParameters();

            string searchText = GetCriteriaStringValue(CriteriaDTO, "SearchText");
            if (!string.IsNullOrWhiteSpace(searchText))
            {
                sql += "\r\n AND (A.NOCLISTCODE LIKE @searchtext OR A.NOCLISTNAME LIKE @searchtext)";
                parameters.Add("searchtext", $"%{searchText}%");
            }

            sql += "\r\n ORDER BY A.NOCLISTNAME";

            var result = await _QueryExecutor.QueryAsync<NOCListPicklistDTO>(LoginDTO, sql, parameters).ConfigureAwait(false);
            return JsonConvert.SerializeObject(result);
        }

        private string GetCriteriaStringValue(CriteriaDTO criteriaDTO, string fieldName)
        {
            try
            {
                var attr = criteriaDTO?.SectionCriteriaList?
                    .SelectMany(s => s.AttributesCriteriaList)
                    .FirstOrDefault(a => string.Equals(a.FieldName, fieldName, StringComparison.OrdinalIgnoreCase));

                if (attr?.FieldValue is JsonElement je)
                    return je.ValueKind == JsonValueKind.String ? je.GetString() : je.ToString();

                return attr?.FieldValue?.ToString();
            }
            catch { return null; }
        }
    }
}