#ifndef MARIADBCLIENT_H
#define MARIADBCLIENT_H

#include <QString>
#include <QStringList>
#include <QVector>
#include <memory>

class MariaDbClient
{
public:
    using Row = QStringList;
    using ResultSet = QVector<Row>;

    MariaDbClient();
    ~MariaDbClient();

    MariaDbClient(const MariaDbClient&) = delete;
    MariaDbClient& operator=(const MariaDbClient&) = delete;

    bool IsLibraryAvailable() const;
    bool IsConnected() const;
    QString LastError() const;

    bool Connect(const QString& host,
                 int port,
                 const QString& user,
                 const QString& password,
                 const QString& database);
    void Close();

    bool Exec(const QString& sql);
    bool Query(const QString& sql, ResultSet& rows);
    unsigned long long LastInsertId() const;

    static QString Escape(const QString& value);

private:
    bool LoadClientLibrary();
    bool BindSymbols();
    void SetError(const QString& message);
    QString ConnectionError() const;

    void* m_library = nullptr;
    void* m_mysql = nullptr;
    bool m_connected = false;
    QString m_lastError;

    void* (*m_init)(void*) = nullptr;
    void* (*m_realConnect)(void*,
                           const char*,
                           const char*,
                           const char*,
                           const char*,
                           unsigned int,
                           const char*,
                           unsigned long) = nullptr;
    int (*m_query)(void*, const char*) = nullptr;
    void* (*m_storeResult)(void*) = nullptr;
    void (*m_freeResult)(void*) = nullptr;
    char** (*m_fetchRow)(void*) = nullptr;
    unsigned int (*m_numFields)(void*) = nullptr;
    const char* (*m_error)(void*) = nullptr;
    void (*m_close)(void*) = nullptr;
    unsigned long long (*m_insertId)(void*) = nullptr;
    unsigned int (*m_fieldCount)(void*) = nullptr;
    int (*m_setCharacterSet)(void*, const char*) = nullptr;
};

#endif // MARIADBCLIENT_H