using FrameworkDAL.DTO.BIZTransactionClass;
using FrameworkDAL.DTO.Formula;
using FrameworkDAL.Query.BIZTransactionClass;
using FrameworkDAL.Query.Formula;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.QueryExecutor;
using GB5Shared.Resource.Response;
using GB5Shared.ResponseStandard;
using GB5Shared.Validation;
using Newtonsoft.Json;
using System.Text;

namespace FrameworkDAL.CustomCode.Formula
{
    public class FormulaDAL : IFormulaDAL
    {
        private readonly IQueryExecutor _QueryExecutor;
        private readonly IValidation _Validation;

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

        public async Task<string> GetFormula(int FormulaId, LoginDTO LoginDTO)
        {

            string json = "";
            try
            {
                string sql = FormulaQB.GET_FORMULA;
                var parameters = new { Formulaid = FormulaId };
                FormulaDTO FormulaDTOs = await _QueryExecutor.QuerySingleAsync<FormulaDTO>(LoginDTO, sql, parameters);
                json = JsonConvert.SerializeObject(FormulaDTOs);
                return json;
            }
            catch (Exception)
            {
                throw;
            }
            finally
            {
                json = null;
            }
        }

        public async Task<int> SaveFormula(FormulaDTO FormulaDTO, LoginDTO LoginDTO)
        {
            try
            {
                const string Sql = FormulaQB.SAVE_FORMULA;
                int result = await _QueryExecutor.ExecuteAsync(LoginDTO, Sql, FormulaDTO);

                string tableName = FormulaDTO.ModuleId == -1499999788 ? "TPAYPROCESSADDON" : "TCOSTPOSTINGADDON";

                var sb = new StringBuilder();

                string columnName = $"F_{FormulaDTO.FormulaCode.ToUpper()}";
                sb.Append($"ALTER TABLE {tableName} ADD {columnName} ");

                switch (FormulaDTO.FormulaDataType)
                {
                    case 0:
                        sb.Append("NUMERIC");
                        if (FormulaDTO.FormulaDataSize > 0)
                            sb.Append("(").Append(FormulaDTO.FormulaDataSize.ToString().Replace(".", ",")).Append(")");
                        break;

                    case 1: 
                        sb.Append("NVARCHAR");
                        if (FormulaDTO.FormulaDataSize > 0)
                            sb.Append("(").Append(FormulaDTO.FormulaDataSize).Append(")");
                        break;

                    case 2:
                        sb.Append("INT");
                        break;

                    case 3:
                        sb.Append("DATETIME");
                        break;

                    default:
                        throw new Exception("Unsupported DataType");
                }

                sb.AppendLine(";");

                // Set default = 0 for numeric
                if (FormulaDTO.FormulaDataType == 0)
                {
                    sb.AppendLine($"UPDATE {tableName} SET {columnName} = 0 WHERE {columnName} IS NULL;");
                }

                await _QueryExecutor.ExecuteAsync(LoginDTO, sb.ToString(), null);

                return result;
            }
            catch (Exception ex)
            {
                string Error = await _Validation.HandleException(ex, $"{ErrorResponse.SaveErrorMessage}");
                throw new Exception(Error);
            }
        }


        public async Task<int> UpdateFormula(FormulaDTO FormulaDTO, LoginDTO LoginDTO)
        {
            try
            {
                const string sqlUpdateFormula = FormulaQB.UPDATE_FORMULA;
                int result = await _QueryExecutor.ExecuteAsync(LoginDTO, sqlUpdateFormula, FormulaDTO);

                string tableName = FormulaDTO.ModuleId == -1499999788 ? "TPAYPROCESSADDON" : "TCOSTPOSTINGADDON";
                string columnName = $"F_{FormulaDTO.FormulaCode.ToUpper()}";

                var sb = new StringBuilder();
                sb.AppendLine($@"
            IF NOT EXISTS (
                SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS
                WHERE TABLE_NAME = '{tableName}' AND COLUMN_NAME = '{columnName}'
            )
            BEGIN
                ALTER TABLE {tableName} ADD {columnName} ");

                switch (FormulaDTO.FormulaDataType)
                {
                    case 0:
                        sb.Append("NUMERIC");
                        if (FormulaDTO.FormulaDataSize > 0)
                            sb.Append("(").Append(FormulaDTO.FormulaDataSize.ToString().Replace(".", ",")).Append(")");
                        sb.AppendLine(";");
                        sb.AppendLine($"UPDATE {tableName} SET {columnName} = 0 WHERE {columnName} IS NULL;");
                        break;

                    case 1:
                        sb.Append("NVARCHAR");
                        if (FormulaDTO.FormulaDataSize > 0)
                            sb.Append("(").Append(FormulaDTO.FormulaDataSize).Append(")");
                        sb.AppendLine(";");
                        break;

                    case 2: 
                        sb.AppendLine("INT;");
                        break;

                    case 3: 
                        sb.AppendLine("DATETIME;");
                        break;

                    default:
                        throw new Exception("Unsupported DataType");
                }

                sb.AppendLine("END;");

                await _QueryExecutor.ExecuteAsync(LoginDTO, sb.ToString(), null);

                return result;
            }
            catch (Exception ex)
            {
                string Error = await _Validation.HandleException(ex, $"{ErrorResponse.UpdateErrorMessage}");
                throw new Exception(Error);
            }
        }



        public async Task<string> GetSelectListFormula(int FirstNumber, int MaxResult, CriteriaDTO CriteriaDTO, LoginDTO LoginDTO, bool IsCount = false)
        {
            try
            {
                string Json = "";
                if (IsCount == false)
                {
                    string SQL = FormulaQB.GET_SELECTLIST_FORMULA;
                    var parameter = new { firstnumber = FirstNumber, maxresult = MaxResult };
                    List<FormulaPicklistDTO> FormulaDTOs = (await _QueryExecutor.QueryAsync<FormulaPicklistDTO>(LoginDTO, SQL, parameter)).ToList();
                    Json = JsonConvert.SerializeObject(FormulaDTOs);
                }
                else
                {
                    int Count = 0;
                    Json = Count.ToString();
                }
                return Json;
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> DeleteFormula(int FormulaId, LoginDTO LoginDTO)
        {
            try
            {
                string Sql = FormulaQB.DELETE_FORMULA;
                var Parameters = new { Formulaid = FormulaId };
                int result = await _QueryExecutor.ExecuteAsync(LoginDTO, Sql, Parameters);

                if (result > 0)
                {
                    return $"{SuccessResponse.DeleteSuccessMessage}";
                }
                else
                {
                    return $"{ErrorResponse.DeleteNotFoundMessage}";
                }
            }
            catch (Exception ex)
            {
                string Error = await _Validation.HandleException(ex, $"{ErrorResponse.DeleteErrorMessage}");
                throw new Exception(Error);
            }
        }
    }
}