#include "mysqlutils.h"

#include <hv/hlog.h>
#include <sstream>

#include <QtSql/QSqlDatabase>
#include <QStringList>

MysqlUtils MysqlUtils::m_instance;

MysqlUtils::MysqlUtils()
    :m_pDbConnection(nullptr)
{}

MysqlUtils::~MysqlUtils()
{
    CloseDatabase();
}

MysqlUtils* MysqlUtils::getInstance()
{
    return &m_instance;
}

bool MysqlUtils::OpenDatabase(const std::string& server, int dbport, const std::string& dbuser, const std::string& dbpasswd, const std::string& database)
{
    // 打开数据库
    try
    {
        if (m_pDbConnection!=nullptr)
        {
            if (m_pDbConnection->isValid())
            {
                hlogd("database already connected.");
                return true;
            }
        }

        using namespace sql;

        // 创建连接
        sql::Driver* driver;
        sql::ConnectOptionsMap connection_properties;

        connection_properties["hostName"] = server.c_str();
        connection_properties["userName"] = dbuser.c_str();
        connection_properties["password"] = dbpasswd.c_str();
        connection_properties["schema"] = database.c_str();
        connection_properties["port"] = dbport;
        connection_properties["OPT_RECONNECT"] = true;

        driver = get_driver_instance();
        m_pDbConnection = driver->connect(connection_properties);

        if (!m_pDbConnection)
        {
            hloge("Failed to connect to database.");
            return false;
        }

        hlogd("new database connection created successfully!");

        return true;
    }
    catch (sql::SQLException& e)
    {
        std::ostringstream ss;
        ss << "SQLException: " << e.what();
        ss<< " (MySQL error code: " << e.getErrorCode();
        ss << ", SQLState: " << e.getSQLState() << " )";
        hloge("Failed to connect to database: %s",ss.str().c_str());
        return false;
    }
}

void MysqlUtils::CloseDatabase()
{
    if (m_pDbConnection)
        m_pDbConnection->close();
}