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/*
 * This file is part of smolbote. It's copyrighted by the contributors recorded
 * in the version control history of the file, available from its original
 * location: https://neueland.iserlohn-fortress.net/smolbote.hg
 *
 * SPDX-License-Identifier: GPL-3.0
 */

#include "browser.h"
#include "src/mainwindow/mainwindow.h"
#include "webengine/urlinterceptor.h"
#include <QtConcurrent>
#include <bookmarks/bookmarkswidget.h>
#include <downloads/downloadswidget.h>

Browser::Browser(int &argc, char *argv[])
    : SingleApplication(argc, argv)
{
    QApplication::setApplicationName("smolbote");
    QApplication::setWindowIcon(QIcon(":/icon.svg"));

    connect(this, &Browser::messageAvailable, this, &Browser::createSession);
}

Browser::~Browser()
{
    /* We can't modify config, so no point in saving it
    if(m_config) {
        //QtConcurrent::run(QThreadPool::globalInstance(), m_config.get(), &Configuration::writeIfNeeded);
        QtConcurrent::run([c = m_config.get()]() {
            qDebug("Writing configuration: %s", c->writeIfNeeded() ? "ok" : "failed");
        });
    }
    */

    if(m_bookmarksManager) {
        QtConcurrent::run(QThreadPool::globalInstance(), m_bookmarksManager.get(), &BookmarksWidget::save);
    }

    qDebug("Waiting for threads to wind down...");
    qDebug("Thread pool is done: %s", QThreadPool::globalInstance()->waitForDone() ? "okay" : "failed");
}

void Browser::setConfiguration(std::shared_ptr<Configuration> &config)
{
    m_config = config;

    QDir pluginsDir(QString::fromStdString(m_config->value<std::string>("plugins.path").value()));
    if(pluginsDir.exists()) {
        const QStringList entries = pluginsDir.entryList(QDir::Files | QDir::Readable);
        for(const QString &name : entries) {
            QPluginLoader loader(pluginsDir.absoluteFilePath(name));
            qDebug("Loading plugin %s: %s", qUtf8Printable(name), loader.load() ? "ok" : "failed");
            if(!loader.isLoaded()) {
                qDebug("Error: %s", qUtf8Printable(loader.errorString()));
            } else {
                Plugin d;
                d.meta = loader.metaData()["MetaData"].toObject();
                d.pointer = loader.instance();
                d.pointer->setParent(this);
                m_plugins.append(d);
            }
        }
    }

    m_bookmarksManager = std::make_shared<BookmarksWidget>(QString::fromStdString(m_config->value<std::string>("bookmarks.path").value()));
    m_downloadManager = std::make_shared<DownloadsWidget>(QString::fromStdString(m_config->value<std::string>("downloads.path").value()));

    m_urlRequestInterceptor = std::make_shared<UrlRequestInterceptor>(QString::fromStdString(m_config->value<std::string>("filter.path").value()));
    m_cookieInterceptor = std::make_shared<CookieInterceptor>("");

    // set default profile
    m_defaultProfile = profile(QString::fromStdString(m_config->value<std::string>("browser.profile").value()));
}

MainWindow *Browser::createWindow()
{
    // the window will delete itself when it closes, so we don't need to delete it
    MainWindow *window = new MainWindow(m_config);
    window->setBookmarksWidget(m_bookmarksManager);
    window->setDownloadsWidget(m_downloadManager);
    window->setProfile(m_defaultProfile);
    window->addPlugins(m_plugins);

    m_windows.append(window);

    // has to be window.get(), but can't be *window
    connect(window, &MainWindow::destroyed, this, [this, window]() {
        m_windows.removeOne(window);
    });
    window->show();

    return window;
}

MainWindow *Browser::createSession(const QString &profileName, bool newWindow, const QStringList &urls)
{
    MainWindow *window = nullptr;

    // if we need to open in a new window, or there are no windows, make one
    if(newWindow || m_windows.isEmpty()) {
        window = createWindow();
        window->setProfile(profile(profileName));
    } else {
        // reverse-iterate through windows to check for window with the same profile
        for(auto it = m_windows.rbegin(); it != m_windows.rend(); ++it) {
            if((*it)->profile()->storageName() == profileName) {
                window = *it;
                break;
            }
        }
        // if none is found, create one
        if(window == nullptr) {
            window = createWindow();
            window->setProfile(profile(profileName));
        }
    }

    Q_CHECK_PTR(window);

    if(urls.isEmpty()) {
        // no URLs were given
        window->newTab(QUrl::fromUserInput(m_config->value<std::string>("profile.homepage").value().c_str()));
    } else {
        for(const QString &url : urls) {
            window->newTab(QUrl::fromUserInput(url));
        }
    }

    return window;
}

std::shared_ptr<WebEngineProfile> Browser::profile(const QString &storageName)
{
    if(m_profiles.contains(storageName)) {
        return m_profiles[storageName];
    }

    // profile with name storageName has not been loaded
    Q_ASSERT(m_config);

    const QString &path = QString::fromStdString(m_config->value<std::string>("profile.path").value());
    std::shared_ptr<WebEngineProfile> _profile = std::shared_ptr<WebEngineProfile>(createProfile(storageName, path, nullptr));
    _profile->setRequestInterceptor(m_urlRequestInterceptor.get());
    _profile->setCookieInterceptor(m_cookieInterceptor.get());
    connect(_profile.get(), &WebEngineProfile::downloadRequested, m_downloadManager.get(), &DownloadsWidget::addDownload);
    m_profiles.insert(storageName, _profile);

    return _profile;
}