using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.GB5Exception;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.QueryExecutor;
using GB5Shared.Resource.Response;
using GB5Shared.Validation;
using LogisticsDAL.DTO.Vehicle;
using LogisticsDAL.Query.Vehicle;
using Microsoft.IdentityModel.Tokens;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace LogisticsDAL.CustomCode.Vehicle
{
    public class VehicleDAL : IVehicleDAL
    {
        private readonly IValidation _Validation;
        private readonly IQueryExecutor _QueryExecutor;

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

        public async Task<string> GetVehicle(int VehicleId, LoginDTO LoginDTO)
        {
            try
            {
                string Sql = VehicleQB.GET_VEHICLE;
                var Parameters = new { vehicleid = VehicleId };
                VehicleDTO VehicleDTO = await _QueryExecutor.QuerySingleAsync<VehicleDTO>(LoginDTO, Sql, Parameters);
                return JsonConvert.SerializeObject(VehicleDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }


        public async Task<int> SaveVehicle(VehicleDTO VehicleDTO, LoginDTO LoginDTO)
        {
            try
            {
                string Sql = VehicleQB.SAVE_VEHICLE;
                return await _QueryExecutor.ExecuteAsync(LoginDTO, Sql, VehicleDTO);
            }
            catch (Exception ex)
            {
                string Error = await _Validation.HandleException(ex, $"{ErrorResponse.SaveErrorMessage}");
                throw new Exception(Error);
            }
        }


        public async Task<int> UpdateVehicle(VehicleDTO VehicleDTO, LoginDTO LoginDTO)
        {
            try
            {
                string Sql = VehicleQB.UPDATE_VEHICLE;
                return await _QueryExecutor.ExecuteAsync(LoginDTO, Sql, VehicleDTO);
            }
            catch (Exception ex)
            {
                throw new Exception("Error while updating Vehicle", ex);
            }
        }


        public async Task<string> DeleteVehicle(int VehicleId, LoginDTO LoginDTO)
        {
            try
            {
                string Sql = VehicleQB.DELETE_VEHICLE;
                var Parameters = new { vehicleid = VehicleId };
                int result = await _QueryExecutor.ExecuteAsync(LoginDTO, Sql, Parameters);  

                if (result > 0)
                {
                    return "Vehicle deleted successfully.";
                }
                else
                {
                    return "Vehicle not found or could not be deleted.";
                }
            }
            catch (Exception ex)
            {
                throw new Exception("Error while deleting Vehicle", ex);
            }
        }

        public async Task<string> GetSelectListVehicle(
    int FirstNumber,
    int MaxResult,
    CriteriaDTO CriteriaDTO,
    LoginDTO LoginDTO,
    bool IsCount = false)
        {
            try
            {
                string Json = "";
                int FilterVehicleNos = 1; // 0 = Login OU, 1 = All vehicles, 2 = OU from FE
                int OuId = -1;

                // Extract filtervehiclenos and ouid from CriteriaDTO
                if (CriteriaDTO?.SectionCriteriaList != null)
                {
                    foreach (var section in CriteriaDTO.SectionCriteriaList)
                    {
                        foreach (var attr in section.AttributesCriteriaList)
                        {
                            if (attr.FieldName.Equals("filtervehiclenos", StringComparison.OrdinalIgnoreCase))
                                FilterVehicleNos = Convert.ToInt32(attr.FieldValue);

                            if (attr.FieldName.Equals("ouid", StringComparison.OrdinalIgnoreCase))
                                OuId = Convert.ToInt32(attr.FieldValue);
                        }
                    }
                }

                if (!IsCount)
                {
                    string SQL = "";
                    object parameters;

                    // -----------------------------
                    // FilterVehicleNos == 0 → Login OU
                    // -----------------------------
                    if (FilterVehicleNos == 0)
                    {
                        SQL = LoginDTO.DatabaseType == 0
                            ? VehicleQB.GET_VEHICLE_NUMBERS
                            : VehicleQB.GET_VEHICLE_NUMBERS_ORACLE;

                        SQL = ApplySelectListVehicle(SQL, CriteriaDTO);
                        SQL = ApplySelectListVehicle(SQL, LoginDTO.UserCriteriaDTO);

                        parameters = new
                        {
                            loginouid = LoginDTO.WorkOUId,
                            firstnumber = FirstNumber,
                            maxresult = MaxResult
                        };
                    }
                    // -----------------------------
                    // FilterVehicleNos == 1 → All vehicles
                    // -----------------------------
                    else if (FilterVehicleNos == 1)
                    {
                        SQL = VehicleQB.GET_ALL_VEHICLE_NUMBERS;

                        SQL = ApplySelectListVehicle(SQL, CriteriaDTO);
                        SQL = ApplySelectListVehicle(SQL, LoginDTO.UserCriteriaDTO);

                        parameters = new
                        {
                            loginouid = LoginDTO.WorkOUId,
                            firstnumber = FirstNumber,
                            maxresult = MaxResult
                        };
                    }
                    // -----------------------------
                    // FilterVehicleNos == 2 → OU from FE
                    // -----------------------------
                    else if (FilterVehicleNos == 2)
                    {
                        if (OuId == -1)
                            throw new MethodNotAllowedException("Please pass OU to filter.");

                        SQL = LoginDTO.DatabaseType == 0
                            ? VehicleQB.GET_VEHICLE_NUMBERS
                            : VehicleQB.GET_VEHICLE_NUMBERS_ORACLE;

                        SQL = ApplySelectListVehicle(SQL, CriteriaDTO);
                        SQL = ApplySelectListVehicle(SQL, LoginDTO.UserCriteriaDTO);

                        parameters = new
                        {
                            loginouid = OuId,
                            firstnumber = FirstNumber,
                            maxresult = MaxResult
                        };
                    }
                    else
                    {
                        throw new MethodNotAllowedException("Type not handled");
                    }
                    var list = (await _QueryExecutor.QueryAsync<VehiclePicklistDTO>(LoginDTO, SQL, parameters)).ToList();
                    Json = JsonConvert.SerializeObject(list);
                }
                else
                {
                    // Return count = 0 (implement actual count query if needed)
                    Json = "0";
                }

                return Json;
            }
            catch (Exception)
            {
                throw;
            }
        }



        private string ApplySelectListVehicle(string sql, CriteriaDTO criteriaDTO)
        {
            if (criteriaDTO?.SectionCriteriaList == null)
                return sql;

            var whereClauses = new List<string>();

            foreach (var section in criteriaDTO.SectionCriteriaList)
            {
                foreach (var attr in section.AttributesCriteriaList)
                {
                    string fieldValue = attr.FieldValue?.ToString();

                    if (string.IsNullOrEmpty(fieldValue))
                        continue;

                    switch (attr.FieldName.ToLower())
                    {
                        case "number":
                            whereClauses.Add("a.VEHICLENUMBER LIKE '%' + @VehicleNumber + '%'");
                            break;
                        case "ownershiptype":
                            whereClauses.Add("a.OWNERSHIPTYPE = @OwnerShipType");
                            break;
                        case "vehicletype.id":
                            whereClauses.Add("a.VEHICLETYPEID = @VehicleTypeId");
                            break;
                        case "tenantid":
                            whereClauses.Add("a.TENANTID = @TenantId");
                            break;
                    }
                }
            }

            if (whereClauses.Count > 0)
                sql += " AND " + string.Join(" AND ", whereClauses);

            return sql;
        }




    }
}