#include "application.h"

#include <QFileOpenEvent>
#include <QDebug>
#include <QDir>
#include <QStyle>
#include <QFileSystemWatcher>
#include <QTimer>
#include <core/vnotex.h>

using namespace vnotex;

Application::Application(int &p_argc, char **p_argv)
    : QApplication(p_argc, p_argv)
{
}

void Application::watchThemeFolder(const QString &p_themeFolderPath)
{
    if (p_themeFolderPath.isEmpty()) {
        return;
    }

    // Initialize watchers only when needed
    if (!m_styleWatcher) {
        m_styleWatcher = new QFileSystemWatcher(this);
    }
    if (!m_reloadTimer) {
        m_reloadTimer = new QTimer(this);
        m_reloadTimer->setSingleShot(true);
        m_reloadTimer->setInterval(500); // 500ms debounce delay
        connect(m_reloadTimer, &QTimer::timeout,
                this, &Application::reloadThemeResources);

        // Connect file watcher to timer
        connect(m_styleWatcher, &QFileSystemWatcher::directoryChanged,
                m_reloadTimer, qOverload<>(&QTimer::start));
        connect(m_styleWatcher, &QFileSystemWatcher::fileChanged,
                m_reloadTimer, qOverload<>(&QTimer::start));
    }

    // Watch the theme folder and its files
    m_styleWatcher->addPath(p_themeFolderPath);

    // Also watch individual files in the theme folder
    QDir themeDir(p_themeFolderPath);
    QStringList files = themeDir.entryList(QDir::Files);
    for (const QString &file : files) {
        m_styleWatcher->addPath(themeDir.filePath(file));
    }
}

void Application::reloadThemeResources()
{
    VNoteX::getInst().getThemeMgr().refreshCurrentTheme();

    auto stylesheet = VNoteX::getInst().getThemeMgr().fetchQtStyleSheet();
    if (!stylesheet.isEmpty()) {
        setStyleSheet(stylesheet);
        style()->unpolish(this);
        style()->polish(this);
    }
}

bool Application::event(QEvent *p_event)
{
    // On macOS, we need this to open file from Finder.
    if (p_event->type() == QEvent::FileOpen) {
        QFileOpenEvent *openEvent = static_cast<QFileOpenEvent *>(p_event);
        qDebug() << "request to open file" << openEvent->file();
        emit openFileRequested(openEvent->file());
    }

    return QApplication::event(p_event);
}