using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MySql.Data.MySqlClient;
using MySql.Data;
using System.ComponentModel;
using MySqlX.XDevAPI;
using System.Security.Cryptography.X509Certificates;

namespace Федосеев_проект
{
    internal class Cl_Федосеев
    {
    }
    class CL_Федосеев
    {
        private static CL_Федосеев instance = null;

        MySqlConnection connection = new MySqlConnection("server=cfif31.ru; port=3306; username=ISPr25-22; " + 
            "password=ISPr25-22; database=ISPr25-22_MARK");

        private CL_Федосеев() { }

        public void openConnection() 
        {
            if(connection.State == System.Data.ConnectionState.Closed)
                connection.Open();
        }

        public void CloseConnection()
        {
            if (connection.State != System.Data.ConnectionState.Open)
                connection.Close();
        }

        public static CL_Федосеев getInstance()
        {
            if (instance != null) return instance;

            else
            {
                instance = new CL_Федосеев();
                instance.openConnection();
                return instance;
            }
        }

        public int CreateCommand(string query)
        {
            MySqlCommand command = connection.CreateCommand();
            command.CommandText = query;

            try
            {
                int rows = command.ExecuteNonQuery();
                return rows;
            }
            catch (Exception ex)
            {
                connection = new MySqlConnection("server=cfif31.ru; port=3306; username=ISPr25-22; " +
                "password=ISPr25-22; database=ISPr25-22_MARK");

                connection.Open();
                command = connection.CreateCommand();
                command.CommandText = query;
                int rows = command.ExecuteNonQuery();

                return rows;
            }
        }
        public MySqlConnection GetConnection()
        {
            return connection;
        }
    }
}