#include "./mainwindow.h"
#include "./webpage.h"

#include "../lib/alpm/manager.h"

#include "resources/config.h"

#include <QGuiApplication>
#include <QClipboard>
#include <QSettings>
#include <QStringBuilder>
#include <QAction>
#include <QMenu>
#include <QKeyEvent>
#include <QMouseEvent>

namespace RepoIndex {

/*!
 * \brief Constructs a new main window.
 */
MainWindow::MainWindow(const QString &webdir, Manager *manager) :
    m_manager(manager),
    m_contextMenu(nullptr)
{
    QSettings settings(QSettings::IniFormat, QSettings::UserScope, QStringLiteral(PROJECT_NAME));
    setWindowTitle(QStringLiteral(APP_NAME));
    setWindowIcon(QIcon::fromTheme(QStringLiteral(PROJECT_NAME)));
    m_webView.setPage(new WebPage(&m_webView));
    QUrl url(QStringLiteral("file://") % webdir % QStringLiteral("/index.html"));
    url.setFragment(settings.value(QStringLiteral("fragment"), QStringLiteral("packages")).toString());
    m_webView.setUrl(url);
    m_webView.setContextMenuPolicy(Qt::CustomContextMenu);
    connect(&m_webView, &QWidget::customContextMenuRequested, this, &MainWindow::showInfoWebViewContextMenu);
    setCentralWidget(&m_webView);
    restoreGeometry(settings.value(QStringLiteral("geometry")).toByteArray());
}

bool MainWindow::event(QEvent *event)
{
    switch(event->type()) {
    case QEvent::KeyRelease: {
        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
        switch(keyEvent->key()) {
        case Qt::Key_Left:
        case Qt::Key_Back:
            m_webView.back();
            return true;
        case Qt::Key_Right:
        case Qt::Key_Forward:
            m_webView.forward();
            return true;
        default:
            ;
        }
        break;
    } case QEvent::MouseButtonPress: {
        QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
        switch(mouseEvent->button()) {
        case Qt::BackButton:
            m_webView.back();
            return true;
        case Qt::ForwardButton:
            m_webView.forward();
            return true;
        default:
            ;
        }
        break;
    } case QEvent::Close: {
        // save settings
        QSettings settings(QSettings::IniFormat, QSettings::UserScope, QStringLiteral(PROJECT_NAME));
        settings.setValue(QStringLiteral("geometry"), saveGeometry());
        settings.setValue(QStringLiteral("fragment"), m_webView.url().fragment());
        break;
    } default:
        ;
    }
    return QMainWindow::event(event);
}

/*!
 * \brief Shows the context menu for the info web view.
 */
void MainWindow::showInfoWebViewContextMenu(const QPoint &)
{
    if(!m_contextMenu) {
        m_contextMenu = new QMenu(this);
        auto *reloadAction = new QAction(QIcon::fromTheme(QStringLiteral("view-refresh")), tr("Reload UI"), m_contextMenu);
        connect(reloadAction, &QAction::triggered, &m_webView, &REPOINDEX_WEB_VIEW::reload);
        m_copyAction = new QAction(QIcon::fromTheme(QStringLiteral("edit-copy")), tr("Copy"), m_contextMenu);
        connect(m_copyAction, &QAction::triggered, this, &MainWindow::copyInfoWebViewSelection);
        auto *updateAction = new QAction(QIcon::fromTheme(QStringLiteral("edit-download")), tr("Update sync-databases"), m_contextMenu);
        connect(updateAction, &QAction::triggered, m_manager, &Manager::forceUpdateAlpmDatabases);
        auto *wipeCacheAction = new QAction(QIcon::fromTheme(QStringLiteral("document-revert")), tr("Wipe cached packages"), m_contextMenu);
        connect(wipeCacheAction, &QAction::triggered, m_manager, &Manager::wipeCache);
        m_contextMenu->addAction(m_copyAction);
        m_contextMenu->addAction(reloadAction);
        m_contextMenu->addSeparator();
        m_contextMenu->addAction(updateAction);
        m_contextMenu->addAction(wipeCacheAction);
    }
    m_copyAction->setDisabled(m_webView.selectedText().isEmpty());
    m_contextMenu->exec(QCursor::pos());
}

/*!
 * \brief Copies the current selection of the info web view.
 */
void MainWindow::copyInfoWebViewSelection()
{
    QGuiApplication::clipboard()->setText(m_webView.selectedText());
}

}