/*
 * 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: git://neueland.iserlohn-fortress.net/smolbote.git
 *
 * SPDX-License-Identifier: GPL-3.0
 */

#include "navigationbutton.h"

#include <QStyle>
#include <QWebEngineHistory>

NavigationButton::NavigationButton(Type type, QWidget *parent) :
    QToolButton(parent)
{
    m_type = type;
    menu = new QMenu(this);

    switch (type) {
    case BackButton:
        setIcon(style()->standardIcon(QStyle::SP_ArrowBack));
        setMenu(menu);
        connect(menu, &QMenu::aboutToShow, this, &NavigationButton::prepareMenu);
        break;
    case ForwardButton:
        setIcon(style()->standardIcon(QStyle::SP_ArrowForward));
        setMenu(menu);
        connect(menu, &QMenu::aboutToShow, this, &NavigationButton::prepareMenu);
        break;
    case ReloadButton:
        setIcon(style()->standardIcon(QStyle::SP_BrowserReload));
        break;
    case StopButton:
        setIcon(style()->standardIcon(QStyle::SP_BrowserStop));
        break;
    }

    connect(this, &NavigationButton::clicked, this, &NavigationButton::doAction);

}


void NavigationButton::setView(WebView *view)
{
    disconnect(loadStartedConnection);
    disconnect(loadFinishedConnection);

    m_view = view;
    if(m_type == BackButton || m_type == ForwardButton) {
        updateOnLoadFinished();
    }

    loadStartedConnection = connect(view, &WebView::loadStarted, this, &NavigationButton::updateOnLoadStarted);
    loadFinishedConnection = connect(view, &WebView::loadFinished, this, &NavigationButton::updateOnLoadFinished);
}

void NavigationButton::updateOnLoadStarted()
{
    switch (m_type) {
    case BackButton:
        break;
    case ForwardButton:
        break;
    case ReloadButton:
        m_type = StopButton;
        setIcon(style()->standardIcon(QStyle::SP_BrowserStop));
        break;
    case StopButton:
        break;
    }
}

void NavigationButton::updateOnLoadFinished()
{
    switch (m_type) {
    case BackButton:
        if(m_view->history()->canGoBack()) {
            setEnabled(true);
        } else {
            setEnabled(false);
        }
        break;
    case ForwardButton:
        if(m_view->history()->canGoForward()) {
            setEnabled(true);
        } else {
            setEnabled(false);
        }
        break;
    case ReloadButton:
        break;
    case StopButton:
        m_type = ReloadButton;
        setIcon(style()->standardIcon(QStyle::SP_BrowserReload));
        break;
    }
}

void NavigationButton::doAction()
{
    switch (m_type) {
    case BackButton:
        m_view->history()->back();
        break;
    case ForwardButton:
        m_view->history()->forward();
        break;
    case ReloadButton:
        m_view->reload();
        break;
    case StopButton:
        m_view->stop();
        break;
    }
}

void NavigationButton::prepareMenu()
{
    menu->clear();

    QList<QWebEngineHistoryItem> items;
    switch (m_type) {
    case BackButton:
        items = m_view->history()->backItems(10);
        break;
    case ForwardButton:
        items = m_view->history()->forwardItems(10);
        break;
    default:
        break;
    }

    for(const QWebEngineHistoryItem &i : qAsConst(items)) {
        QAction *a = menu->addAction(i.title());
        connect(a, &QAction::triggered, this, [i, this]() {
            m_view->history()->goToItem(i);
        });
    }
}