// changetype.h
#ifndef CHANGETYPE_H
#define CHANGETYPE_H

#include "eventbus.h"
#include <QString>
#include <QDateTime>

enum ChangeType {
    ADD,
    DELETE,
    UPDATE
};

struct MailChange {
    QString mailItemId;
    QString type; // ADD, DELETE, UPDATE
    QString subject;
    QString body;
    QDateTime timestamp;
    QString changeSource; // e.g., "IMAP_SYNC", "SMTP_SYNC"
};

class ChangeProcessor : public QObject {
    Q_OBJECT
public:
    explicit ChangeProcessor(EventBus* bus, QObject *parent = nullptr);

    void processChange(const MailChange& change);

signals:
    void mailChangeDetected(const MailChange& change);

private:
    EventBus* m_eventBus;
    // In a real system, this would interface with the database/DAO layer.
    void applyChangeToModel(const MailChange& change); 
};

#endif // CHANGETYPE_H