#include "alertmanager.h"

/**
 * A macro to generate the switch case statements to handle specific alert types
 */
#define ALERT_EVENT_CASE(name, signal, alert)         \
    case name:                                        \
        emit signal(lt::alert_cast<lt::name>(alert)); \
        break

AlertManager::AlertManager(QObject *parent) : QObject(parent)
{
    connect(this, &AlertManager::alertsReady, this, &AlertManager::dispatchAlertsForSession);
}

void AlertManager::addSession(lt::session_handle *session)
{
    session->set_alert_notify([this, session]() -> void {
        emit alertsReady(session);
    });
}

void AlertManager::dispatchAlertsForSession(lt::session_handle *session)
{
    std::vector<lt::alert*> alerts;
    session->pop_alerts(&alerts);

    for (auto alert : alerts) {
        switch(alert->type()) {
            ALERT_EVENT_CASE(add_torrent_alert,             addTorrentAlerted,           alert);
            ALERT_EVENT_CASE(file_completed_alert,          fileCompletedAlerted,        alert);
            ALERT_EVENT_CASE(metadata_received_alert,       metadataReceivedAlerted,     alert);
            ALERT_EVENT_CASE(save_resume_data_alert,        saveResumeDataAlerted,       alert);
            ALERT_EVENT_CASE(save_resume_data_failed_alert, saveResumeDataFailedAlerted, alert);
            ALERT_EVENT_CASE(state_changed_alert,           stateChangedAlerted,         alert);
            ALERT_EVENT_CASE(state_update_alert,            stateUpdateAlerted,          alert);
            ALERT_EVENT_CASE(torrent_finished_alert,        torrentFinishedAlerted,      alert);
        }
    }
}