/* ============================================================
* QupZilla - WebKit based browser
* Copyright (C) 2010-2011  David Rosca
*
* 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 "autofillmodel.h"
#include "qupzilla.h"
#include "webview.h"
#include "mainapplication.h"
#include "autofillnotification.h"

AutoFillModel::AutoFillModel(QupZilla* mainClass, QObject* parent) :
    QObject(parent)
    ,p_QupZilla(mainClass)
    ,m_isStoring(false)
{
    QTimer::singleShot(0, this, SLOT(loadSettings()));
}

void AutoFillModel::loadSettings()
{
    QSettings settings(mApp->getActiveProfilPath()+"settings.ini", QSettings::IniFormat);
    settings.beginGroup("Web-Browser-Settings");
    m_isStoring = settings.value("AutoFillForms",true).toBool();
    settings.endGroup();
}

bool AutoFillModel::isStored(const QUrl &url)
{
    QString server = url.host();
    QSqlQuery query;
    query.exec("SELECT count(id) FROM autofill WHERE server='"+server+"'");
    query.next();
    if (query.value(0).toInt()>0)
        return true;
    return false;
}

bool AutoFillModel::isStoringEnabled(const QUrl &url)
{
    if (!m_isStoring)
        return false;
    QString server = url.host();
    QSqlQuery query;
    query.exec("SELECT count(id) FROM autofill_exceptions WHERE server='"+server+"'");
    query.next();
    if (query.value(0).toInt()>0)
        return false;
    return true;
}

void AutoFillModel::blockStoringfor (const QUrl &url)
{
    QString server = url.host();
    QSqlQuery query;
    query.exec("INSERT INTO autofill_exceptions (server) VALUES ('"+server+"')");
}

QString AutoFillModel::getUsername(const QUrl &url)
{
    QString server = url.host();
    QSqlQuery query;
    query.exec("SELECT username FROM autofill WHERE server='"+server+"'");
    query.next();
    return query.value(0).toString();
}

QString AutoFillModel::getPassword(const QUrl &url)
{
    QString server = url.host();
    QSqlQuery query;
    query.exec("SELECT password FROM autofill WHERE server='"+server+"'");
    query.next();
    return query.value(0).toString();
}

///HTTP Authorization
bool AutoFillModel::addEntry(const QUrl &url, const QString &name, const QString &pass)
{
    QSqlQuery query;
    query.exec("SELECT username FROM autofill WHERE server='"+url.host()+"'");
    if (query.next())
        return false;
    query.prepare("INSERT INTO autofill (server, username, password) VALUES (?,?,?)");
    query.bindValue(0, url.host());
    query.bindValue(1, name);
    query.bindValue(2, pass);
    return query.exec();
}

///WEB Form
bool AutoFillModel::addEntry(const QUrl &url, const QByteArray &data, const QString &pass)
{
    QSqlQuery query;
    query.exec("SELECT data FROM autofill WHERE server='"+url.host()+"'");
    if (query.next())
        return false;

    query.prepare("INSERT INTO autofill (server, data, password) VALUES (?,?,?)");
    query.bindValue(0, url.host());
    query.bindValue(1, data);
    query.bindValue(2, pass);
    return query.exec();
}

void AutoFillModel::completePage(WebView* view)
{
    if (!isStored(view->url()))
        return;

    QWebElementCollection inputs;
    QList<QWebFrame*> frames;
    frames.append(view->page()->mainFrame());
    while (!frames.isEmpty()) {
        QWebFrame* frame = frames.takeFirst();
        inputs.append(frame->findAllElements("input"));
        frames += frame->childFrames();
    }

    QSqlQuery query;
    query.exec("SELECT data FROM autofill WHERE server='"+view->url().host()+"'");
    query.next();
    QByteArray data = query.value(0).toByteArray();
    if (data.isEmpty())
        return;

    QList<QPair<QString, QString> > arguments = QUrl::fromEncoded(QByteArray("http://bla.com/?"+data)).queryItems();
    for (int i = 0; i<arguments.count(); i++) {
        QString key = QUrl::fromEncoded(arguments.at(i).first.toAscii()).toString();
        QString value = QUrl::fromEncoded(arguments.at(i).second.toAscii()).toString();
        //key.replace("+"," ");
        //value.replace("+"," ");

        for (int i = 0; i<inputs.count(); i++) {
            QWebElement element = inputs.at(i);

            if (element.attribute("type")!="text" && element.attribute("type")!="password" && element.attribute("type")!="")
                continue;
            if (key == element.attribute("name"))
                element.setAttribute("value",value);
        }
    }
}

void AutoFillModel::post(const QNetworkRequest &request, const QByteArray &outgoingData)
{
    //Dont save in private browsing
    if (mApp->webSettings()->testAttribute(QWebSettings::PrivateBrowsingEnabled))
        return;
    m_lastOutgoingData = outgoingData;

    QVariant v = request.attribute((QNetworkRequest::Attribute)(QNetworkRequest::User + 100));
    QWebPage* webPage = (QWebPage*)(v.value<void*>());
    v = request.attribute((QNetworkRequest::Attribute)(QNetworkRequest::User + 102));
    WebView* webView = (WebView*)(v.value<void*>());
    if (!webPage || !webView)
        return;

    v = request.attribute((QNetworkRequest::Attribute)(QNetworkRequest::User + 101));
    QWebPage::NavigationType type = (QWebPage::NavigationType)v.toInt();

    if (type!=QWebPage::NavigationTypeFormSubmitted)
        return;

    QString passwordName = "";
    QString passwordValue = "";

    QWebElementCollection inputs;
    QList<QWebFrame*> frames;
    frames.append(webPage->mainFrame());
    while (!frames.isEmpty()) {
        QWebFrame* frame = frames.takeFirst();
        inputs.append(frame->findAllElements("input[type=\"password\"]"));
        frames += frame->childFrames();
    }

    foreach (QWebElement element, inputs) {
        passwordName = element.attribute("name");
        passwordValue = element.evaluateJavaScript("this.value").toString();
        if (!passwordValue.isEmpty())
            break;
    }

    //Return if storing is not enabled, data for this page is already stored, no password element found in sent data
    if (passwordName.isEmpty() || !isStoringEnabled(request.url()) || isStored(request.url()))
        return;

    //Return if no password form has been sent
    if (!outgoingData.contains((QUrl(passwordName).toEncoded() + "=")) || passwordValue.isEmpty())
        return;

    AutoFillNotification* aWidget = new AutoFillNotification(webView->url(), outgoingData, passwordValue);
    webView->addNotification(aWidget);
}