#ifndef DATABASEMANAGER_H
#define DATABASEMANAGER_H
#include <QSqlDatabase>
#include <QVariantMap>

// 数据库管理类
class DatabaseManager {
public:
    enum Channel {
        MainChannel = 1,
        SecondaryChannel
    };
    struct File {
        int id; // id
        Channel channel; // 通道
        QString datetime; // 时间 yyyy-MM-dd hh:mm:ss
        QString filename; // 文件名
    };
    static DatabaseManager* getInstace();
    ~DatabaseManager();

    bool open();
    void close();

    bool insert(File file);

    bool remove(DatabaseManager::Channel chn, QString name);

    QList<DatabaseManager::File> getTopTwo();
    QList<DatabaseManager::File> get(QVariantMap params);
    QList<DatabaseManager::File> get(Channel chn);
    QStringList getAllYears(Channel chn);
    QStringList getAllMonths(Channel chn, QString year);
    QStringList getAllDays(Channel, QString year, QString month);

private:
    DatabaseManager();

private:
    static DatabaseManager* instance;
    QSqlDatabase db;
};

#endif // DATABASEMANAGER_H