using Npgsql;

namespace BeautySalonDatabase.Implements
{
    public class ClearDatabase
    {
        public void Clear()
        {
            using var conn = GetConnection();
            conn.Open();
            using var cmd = new NpgsqlCommand("drop sequence if exists seq_specialisation; " +
                "drop sequence if exists seq_service; " +
                "drop sequence if exists seq_master; " +
                "drop sequence if exists seq_client; " +
                "drop sequence if exists seq_reception; " +
                "drop sequence if exists seq_cheque; " +
                "create sequence seq_specialisation increment by 1 start with 1 minvalue 1; " +
                "create sequence seq_service increment by 1 start with 1 minvalue 1; " +
                "create sequence seq_master increment by 1 start with 1 minvalue 1;  " +
                "create sequence seq_client increment by 1 start with 1 minvalue 1;  " +
                "create sequence seq_reception increment by 1 start with 1 minvalue 1;  " +
                "create sequence seq_cheque increment by 1 start with 1 minvalue 1;  " +
                "delete from specialisations; " +
                "delete from services; " +
                "delete from masters; " +
                "delete from clients; " +
                "delete from cheques;");
            cmd.ExecuteNonQuery();
        }

        public NpgsqlConnection GetConnection()
        {
            return new NpgsqlConnection("Host=127.0.0.1;Port=5555;Username=elina;Database=beauty_salon;Password=elina");
        }
    }
}