/** LICENSE ********************************************************************
 **
 ** smolbote: yet another qute browser
 ** Copyright (C) 2017  Xian Nox
 **
 ** This program is free software: you can redistribute it and/or modify
 ** it under the terms of the GNU General Public License as published by
 ** the Free Software Foundation, either version 3 of the License, or
 ** (at your option) any later version.
 **
 ** This program is distributed in the hope that it will be useful,
 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ** GNU General Public License for more details.
 **
 ** You should have received a copy of the GNU General Public License
 ** along with this program.  If not, see <http://www.gnu.org/licenses/>.
 **
 ******************************************************************************/

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "settings.h"
#include <QMenu>
#include <QMenuBar>
#include <QCloseEvent>
#include <QMessageBox>
#include "browser.h"
#include "forms/profiledialog.h"
#include <QApplication>
#include <QInputDialog>
#include <QWebEngineDownloadItem>
#include <QStatusBar>

MainWindow::MainWindow(Browser *instance, QUrl defaultUrl, QWidget *parent) :
    QMainWindow(parent),
    downloadManager(new DownloadDialog(this)),
    blocklistManager(new BlockerDialog(this)),
    ui(new Ui::MainWindow),
    navigationToolBar(new QToolBar(tr("Navigation"), this)),
    tabToolBar(new QToolBar(tr("Tab bar"), this)),
    tabBar(new WebViewTabBar(this)),
    urlLineEdit(new UrlLineEdit(navigationToolBar)),
    progressBar(new LoadingBar(this))
{
    browserInstance = instance;
    Settings settings;

    // Load profile and connect its signals
    loadProfile(settings.value("defaults/profile").toString());

    ui->setupUi(this);
    resize(settings.value("window/width", 800).toInt(), settings.value("window/height", 600).toInt());

    // Browser menu
    QMenu *browserMenu = new QMenu(qApp->applicationName(), ui->menuBar);
    ui->menuBar->addMenu(browserMenu);
    browserMenu->addAction(tr("New Window"), this, SLOT(handleNewWindow()), QKeySequence(tr("Ctrl+N")));
    browserMenu->addAction(tr("New Tab"), this, SLOT(createNewTab()), QKeySequence(tr("Ctrl+T")));
    browserMenu->addSeparator();
    browserMenu->addAction(tr("About"), this, SLOT(about()), QKeySequence(tr("F1")));
    browserMenu->addAction(tr("About Qt"), qApp, SLOT(aboutQt()));
    browserMenu->addAction(tr("Quit"), qApp, SLOT(quit()), QKeySequence(tr("Ctrl+Q")));

    // Tools menu
    QMenu *toolsMenu = new QMenu(tr("Tools"), ui->menuBar);
    ui->menuBar->addMenu(toolsMenu);
    toolsMenu->addAction(tr("Downloads"), downloadManager, SLOT(show()));
    toolsMenu->addAction(tr("Blocker"), blocklistManager, SLOT(show()));

    // Profile menu
    QMenu *profileMenu = new QMenu(tr("Profile"), ui->menuBar);
    ui->menuBar->addMenu(profileMenu);
    profileMenu->addAction(tr("View profile"), this, SLOT(execProfileEditor()));
    profileMenu->addAction(tr("Load profile"), this, SLOT(loadProfileGUI()));
    //profileMenu->addAction(tr("Settings"));
    //profileMenu->addAction(tr("Cookies"));

    this->addToolBar(Qt::TopToolBarArea, navigationToolBar);
    this->addToolBarBreak(Qt::TopToolBarArea);
    this->addToolBar(Qt::TopToolBarArea, tabToolBar);

    navigationToolBar->addWidget(urlLineEdit);
    connect(urlLineEdit, SIGNAL(returnPressed()), this, SLOT(handleUrlChanged()));

    tabToolBar->addWidget(tabBar);
    connect(tabBar, SIGNAL(currentTabChanged(WebView*)), this, SLOT(handleTabChanged(WebView*)));

    ui->statusBar->addPermanentWidget(progressBar);

    if(!defaultUrl.isEmpty()) {
        createNewTab(defaultUrl);
    } else {
        createNewTab(settings.value("defaults/url", QUrl("http://duckduckgo.com")).toUrl());
    }
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::createNewTab(const QUrl &url)
{
    tabBar->addTab(profile, url);
}

void MainWindow::closeEvent(QCloseEvent *event)
{
    if(tabBar->count() > 1) {
        int ret = QMessageBox::warning(this, tr("Close window?"), tr("Close multiple tabs?"), QMessageBox::Yes | QMessageBox::No, QMessageBox::No);
        if(ret == QMessageBox::No) {
            event->ignore();
            return;
        }
    }
    QMainWindow::closeEvent(event);
}

void MainWindow::about()
{
    QMessageBox::about(this, tr("About"), tr("<h3>smolbote %1</h3>"
                       "<p><i>yet another Qute browser</i></p>"
                       "<p>Copyright (C) 2017  Xian Nox</p>"
                       "<p>This program comes with ABSOLUTELY NO WARRANTY. "
                       "This is free software, and you are welcome to redistribute it under the conditions set by the GNU GPLv3.</p>")
                       .arg(qApp->applicationVersion()));
}

void MainWindow::loadProfile(const QString &name)
{
    if(profile) {
        profile->deleteLater();
    }

    if(name.isEmpty()) {
        qDebug("Creating off-the-record profile");
        profileName = tr("Off the record");
        profile = new WebEngineProfile(this);
    } else {
        profileName = name;
        qDebug("Using profile: %s", qUtf8Printable(profileName));
        profile = new WebEngineProfile(profileName, this);
    }

    UrlRequestInterceptor *interceptor = new UrlRequestInterceptor(this);
    interceptor->setSubscription(blocklistManager->subscription());
    profile->setRequestInterceptor(interceptor);
    connect(profile, SIGNAL(downloadRequested(QWebEngineDownloadItem*)), downloadManager, SLOT(addDownload(QWebEngineDownloadItem*)));
}

void MainWindow::loadProfileGUI()
{
    bool ok;
    QString name = QInputDialog::getText(this, tr("Load Profile"), tr("Enter Profile name"), QLineEdit::Normal, QString(""), &ok);
    if(ok) {
        loadProfile(name);
        tabBar->setProfile(profile);
    }
}

void MainWindow::handleNewWindow(const QUrl &url)
{
    browserInstance->addWindow(new MainWindow(browserInstance, url));
}

void MainWindow::handleTabChanged(WebView *view)
{
    // clear the parent of the central widget so it doesn't get deleted
    centralWidget()->setParent(0);

    // disconnect signals
    disconnect(centralWidget());

    // set new central widget
    setCentralWidget(view);

    // connect signals
    connect(view, SIGNAL(urlChanged(QUrl)), urlLineEdit, SLOT(setUrl(QUrl)));
    connect(view, SIGNAL(titleChanged(QString)), this, SLOT(handleTitleUpdated(QString)));
    connect(view, SIGNAL(linkHovered(QString)), ui->statusBar, SLOT(showMessage(QString)));

    progressBar->connectWebView(view);

    // update UI
    urlLineEdit->setUrl(view->url());
    this->handleTitleUpdated(view->title());
    centralWidget()->setFocus();
}

void MainWindow::handleUrlChanged()
{
    tabBar->currentView()->load(urlLineEdit->url());
}

void MainWindow::handleTitleUpdated(const QString &title)
{
    // For some reason, the long dash gets garbled if read from the settings
    //setWindowTitle(title + settings.value("window/title").toString());
    setWindowTitle(title + tr(" — smolbote"));
}

void MainWindow::execProfileEditor()
{
    ProfileDialog *dialog = new ProfileDialog(profile, this);
    dialog->exec();
}