// src/services/imapsynchronizer.cpp
#include "imapsynchronizer.h"
#include <QDebug>
#include <Q例外>

// NOTE: Actual implementation requires an IMAP3 library (e.g., libimap or Qt's built-in network classes). 
// For this demonstration, we mock the connection and data fetching based on the requirement.

ImapSynchronizer::ImapSynchronizer(QObject *parent) : QObject(parent) {}

bool ImapSynchronizer::connectImap(const QString &host, int port, const QString &user, const QString &password) {
    qDebug() << "[IMAP] Attempting connection to" << host << ":" << port;
    // In a real implementation, this would involve setting up the IMAP3 client connection.
    if (host.isEmpty() || port == 0) {
        qWarning() << "[IMAP Error] Host or Port is invalid.";
        return false;
    }
    
    // Mock successful connection for demonstration purposes.
    qDebug() << "[IMAP Success] Connected to server" << host;
    return true;
}

QVector<MailItem> ImapSynchronizer::fetchFromImap3(const QString &folderId, int offset) {
    if (!connectImap("imap.example.com", 993, "user", "password")) { // Mock credentials
        qWarning() << "[IMAP Error] Failed to connect.";
        return QVector<MailItem>();
    }

    qDebug() << "[IMAP] Fetching items for folder:" << folderId << " starting at offset:" << offset;

    // Mock data retrieval. In a real scenario, this reads from the IMAP stream.
    QVector<MailItem> mails;
    if (folderId == "inbox") {
        mails.append(MailItem{ "mail_id_123", "Subject 1", "Body 1", true });
        mails.append(MailItem{ "mail_id_456", "Subject 2", "Body 2", false });
    } else {
        // Simulate no mail found for other folders
    }

    return mails;
}

bool ImapSynchronizer::sendMail(const MailItem &mail, const QString &accountId) {
    qDebug() << "[IMAP] Attempting to send mail:" << mail.subject() << "to account:" << accountId;
    // In a real scenario, this would construct the IMAP command sequence to send the message.
    return true; // Mock success
}

void ImapSynchronizer::fetchMails(const QString &accountId, const QString &folderId) {
    QVector<MailItem> items = fetchFromImap3(folderId, 0);
    if (!items.isEmpty()) {
        qDebug() << "[IMAP] Successfully fetched" << items.size() << " mail items.";
    } else {
        qDebug() << "[IMAP] No mail items found in folder:" << folderId;
    }
}

void ImapSynchronizer::moveMail(const QString &mailItemId, const QString &targetFolderId) {
    qDebug() << "[IMAP] Moving mail:" << mailItemId << "to" << targetFolderId;
    // Real implementation would involve IMAP MOVE command.
}

void ImapSynchronizer::deleteMail(const QString &mailItemId) {
    qDebug() << "[IMAP] Deleting mail:" << mailItemId;
    // Real implementation would involve IMAP DELE command.
}

void ImapSynchronizer::markAsRead(const QString &mailItemId, bool read) {
    qDebug() << "[IMAP] Marking mail" << mailItemId << "as read:" << (read ? "True" : "False");
    // Real implementation would involve IMAP MARK_READ command.
}