/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * 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; version 2 of the License

 *

 * 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, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include <QHBoxLayout>

#include <QLineEdit>

#include <QTextBrowser>

#include <QLabel>

#include <QHttp>

#include <QSysInfo>

#include <QDebug>

#include <QBuffer>

#include <QApplication>

#include <QDesktopWidget>

#include <QNetworkReply>

#include <QProcess>

#include <QMessageBox>

#include <QCheckBox>

#include <QByteArray>

#include <string>

#ifdef Q_OS_WIN

#define WINVER 0x0500

#include <windows.h>

#else

#include <unistd.h>

#include <sys/types.h>

#endif

#ifdef Q_OS_MAC

#include <sys/sysctl.h>

#ifndef _SC_NPROCESSORS_ONLN

#define _SC_NPROCESSORS_ONLN 58

#endif

#endif

#include <stdint.h>

#include "AbstractPage.h"

#include "hwconsts.h"

#include "feedbackdialog.h"

FeedbackDialog::FeedbackDialog(QWidget * parent) : QDialog(parent)

{

    setModal(true);

    setWindowFlags(Qt::Sheet);

    setWindowModality(Qt::WindowModal);

    setWindowTitle(tr("Feedback"));

    resize(700, 460);

    setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);

    netManager = NULL;

    GenerateSpecs();

    /* Top layout */

    QVBoxLayout * pageLayout = new QVBoxLayout();

    QGridLayout * feedbackLayout = new QGridLayout();

    setStyleSheet("QPushButton { padding: 5px }");

    info = new QLabel();

    info->setText(QString(

        "<style type=\"text/css\">"

        "a { color: #fc0; }"

        "b { color: #0df; }"

        "</style>"

        "<div align=\"center\"><h1>%1</h1>"

        "<h3>%2<h3>"

        "<h4>%3 <a href=\"https://hedgewars.org/kb/KnownBugs\">known bugs</a><h4>"

        "<h4>%4<h4>"

        "</div>")

        .arg(tr("Send us feedback!"))

        .arg(tr("We are always happy about suggestions, ideas, or bug reports."))

        .arg(tr("If you found a bug, you can see if it's already been reported here: "))

        .arg(tr("Your email address is optional, but necessary if you want us to get back at you."))

    );

    info->setOpenExternalLinks(true);

    pageLayout->addWidget(info);

    label_email = new QLabel();

    label_email->setText(QLabel::tr("Your Email"));

    email = new QLineEdit();

    feedbackLayout->addWidget(label_email, 0, 0);

    feedbackLayout->addWidget(email, 0, 1);

    label_summary = new QLabel();

    label_summary->setText(QLabel::tr("Summary"));

    summary = new QLineEdit();

    feedbackLayout->addWidget(label_summary, 1, 0);

    feedbackLayout->addWidget(summary, 1, 1);

    CheckSendSpecs = new QCheckBox();

    CheckSendSpecs->setText(QLabel::tr("Send system information"));

    CheckSendSpecs->setChecked(true);

    BtnViewInfo = new QPushButton(tr("View"));

    BtnViewInfo->setFixedHeight(40);

    feedbackLayout->addWidget(CheckSendSpecs, 0, 2, 2, 1);

    feedbackLayout->addWidget(BtnViewInfo, 0, 3, 2, 1);

    connect(BtnViewInfo, SIGNAL(clicked()), this, SLOT(ShowSpecs()));

    label_description = new QLabel();

    label_description->setText(QLabel::tr("Description"));

    description = new QTextBrowser();

    description->setReadOnly(false);

    feedbackLayout->addWidget(label_description, 2, 0);

    feedbackLayout->addWidget(description, 2, 1, 1, 3);

    /* Bottom layout */

    QHBoxLayout * captchaLayout = new QHBoxLayout();

    QVBoxLayout * captchaInputLayout = new QVBoxLayout();

    QPushButton * BtnCancel = new QPushButton(tr("Cancel"));

    feedbackLayout->addWidget(BtnCancel, 3, 0);

    BtnCancel->setFixedHeight(40);

    connect(BtnCancel, SIGNAL(clicked()), this, SLOT(reject()));

    label_captcha = new QLabel();

    label_captcha->setStyleSheet("border: 3px solid #ffcc00; border-radius: 4px");

    label_captcha->setText("loading<br>captcha");

    label_captcha->setFixedSize(200, 50);

    captchaLayout->addWidget(label_captcha);

    label_captcha_input = new QLabel();

    label_captcha_input->setText(QLabel::tr("Type the security code:"));

    captchaInputLayout->addWidget(label_captcha_input);

    captchaInputLayout->setAlignment(label_captcha, Qt::AlignBottom);

    captcha_code = new QLineEdit();

    captcha_code->setFixedHeight(30);

    captchaInputLayout->addWidget(captcha_code);

    captchaInputLayout->setAlignment(captcha_code, Qt::AlignTop);

    captchaLayout->addLayout(captchaInputLayout);

    captchaLayout->setAlignment(captchaInputLayout, Qt::AlignLeft);

    QWidget * captchaLayoutWidget = new QWidget();

    captchaLayoutWidget->setContentsMargins(0, 0, 0, 0);

    captchaLayoutWidget->setLayout(captchaLayout);

    feedbackLayout->addWidget(captchaLayoutWidget, 3, 1, 1, 2);

    // TODO: Set green arrow icon for send button (:/res/Start.png)

    BtnSend = new QPushButton(tr("Send Feedback"));

    feedbackLayout->addWidget(BtnSend, 3, 3);

    BtnSend->setFixedHeight(40);

    connect(BtnSend, SIGNAL(clicked()), this, SLOT(SendFeedback()));

    pageLayout->addLayout(feedbackLayout);

    QVBoxLayout * dialogLayout = new QVBoxLayout(this);

    dialogLayout->addLayout(pageLayout, 1);

    LoadCaptchaImage();

}

void FeedbackDialog::GenerateSpecs()

{

    // Gather some information about the system and embed it into the report

    QDesktopWidget* screen = QApplication::desktop();

    QString os_version = "Operating system: ";

    QString qt_version = QString("Qt version: ") + QT_VERSION_STR + QString("\n");

    QString total_ram = "Total RAM: ";

    QString number_of_cores = "Number of cores: ";

    QString compiler_bits = "Compiler architecture: ";

    QString compiler_version = "Compiler version: ";

    QString kernel_line = "Kernel: ";

    QString screen_size = "Size of the screen(s): " +

        QString::number(screen->width()) + "x" + QString::number(screen->height()) + "\n";

    QString number_of_screens = "Number of screens: " + QString::number(screen->screenCount()) + "\n";

    QString processor_name = "Processor: ";

    // platform specific code

#ifdef Q_OS_MACX

    number_of_cores += QString::number(sysconf(_SC_NPROCESSORS_ONLN)) + "\n";

    uint64_t memsize;

    size_t len = sizeof(memsize);

    static int mib_s[2] = { CTL_HW, HW_MEMSIZE };

    if (sysctl (mib_s, 2, &memsize, &len, NULL, 0) == 0)

        total_ram += QString::number(memsize/1024/1024) + " MB\n";

    else

        total_ram += "Error getting total RAM information\n";

    int mib[] = {CTL_KERN, KERN_OSRELEASE};

    sysctl(mib, sizeof mib / sizeof(int), NULL, &len, NULL, 0);

    char *kernelVersion = (char *)malloc(sizeof(char)*len);

    sysctl(mib, sizeof mib / sizeof(int), kernelVersion, &len, NULL, 0);

    QString kernelVersionStr = QString(kernelVersion);

    free(kernelVersion);

    int major_version = kernelVersionStr.split(".").first().toUInt() - 4;

    int minor_version = kernelVersionStr.split(".").at(1).toUInt();

    os_version += QString("Mac OS X 10.%1.%2").arg(major_version).arg(minor_version) + " ";

    switch(major_version)

    {

        case 4:  os_version += "\"Tiger\"\n"; break;

        case 5:  os_version += "\"Leopard\"\n"; break;

        case 6:  os_version += "\"Snow Leopard\"\n"; break;

        case 7:  os_version += "\"Lion\"\n"; break;

        case 8:  os_version += "\"Mountain Lion\"\n"; break;

        default: os_version += "\"Unknown version\"\n"; break;

    }

#endif

#ifdef Q_OS_WIN

    SYSTEM_INFO sysinfo;

    GetSystemInfo(&sysinfo);

    number_of_cores += QString::number(sysinfo.dwNumberOfProcessors) + "\n";

    MEMORYSTATUSEX status;

    status.dwLength = sizeof(status);

    GlobalMemoryStatusEx(&status);

    total_ram += QString::number(status.ullTotalPhys/1024/1024) + " MB\n";

    switch(QSysInfo::windowsVersion())

    {

        case QSysInfo::WV_NT: os_version += "Windows NT\n"; break;

        case QSysInfo::WV_2000: os_version += "Windows 2000\n"; break;

        case QSysInfo::WV_XP: os_version += "Windows XP\n"; break;

        case QSysInfo::WV_2003: os_version += "Windows Server 2003\n"; break;

        case QSysInfo::WV_VISTA: os_version += "Windows Vista\n"; break;

        case QSysInfo::WV_WINDOWS7: os_version += "Windows 7\n"; break;

#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)

        case QSysInfo::WV_WINDOWS8: os_version += "Windows 8\n"; break;

#endif

        default: os_version += "Windows (Unknown version)\n"; break;

    }

    kernel_line += "Windows kernel\n";

#endif

#ifdef Q_OS_LINUX

    number_of_cores += QString::number(sysconf(_SC_NPROCESSORS_ONLN)) + "\n";

    quint32 pages = sysconf(_SC_PHYS_PAGES);

    quint32 page_size = sysconf(_SC_PAGE_SIZE);

    quint64 total = (quint64)pages * page_size / 1024 / 1024;

    total_ram += QString::number(total) + " MB\n";

    os_version += "GNU/Linux or BSD\n";

#endif

    // uname -a

#if defined(Q_OS_LINUX) || defined(Q_OS_MAC)

    QProcess *process = new QProcess();

    QStringList arguments = QStringList("-a");

    process->start("uname", arguments);

    if (process->waitForFinished())

        kernel_line += QString(process->readAll());

    delete process;

#endif

#if (defined(Q_OS_WIN) && defined(__i386__)) || defined(__x86_64__)

    // cpu info

    quint32 registers[4];

    quint32 i;

    i = 0x80000002;

    asm volatile

      ("cpuid" : "=a" (registers[0]), "=b" (registers[1]), "=c" (registers[2]), "=d" (registers[3])

       : "a" (i), "c" (0));

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[0]), 4);

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[1]), 4);

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[2]), 4);

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[3]), 4);

    i = 0x80000003;

    asm volatile

      ("cpuid" : "=a" (registers[0]), "=b" (registers[1]), "=c" (registers[2]), "=d" (registers[3])

       : "a" (i), "c" (0));

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[0]), 4);

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[1]), 4);

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[2]), 4);

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[3]), 4);

    i = 0x80000004;

    asm volatile

      ("cpuid" : "=a" (registers[0]), "=b" (registers[1]), "=c" (registers[2]), "=d" (registers[3])

       : "a" (i), "c" (0));

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[0]), 4);

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[1]), 4);

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[2]), 4);

    processor_name += QByteArray(reinterpret_cast<char*>(&registers[3]), 4);

    processor_name += "\n";

#else

    processor_name += "Unknown";

#endif

    // compiler

#ifdef __GNUC__

    compiler_version += "GCC " + QString(__VERSION__) + "\n";

#else

    compiler_version += "Unknown\n";

#endif

    if(sizeof(void*) == 4)

        compiler_bits += "i386\n";

    else if(sizeof(void*) == 8)

        compiler_bits += "x86_64\n";

    // concat system info

    specs = qt_version

        + os_version

        + total_ram

        + screen_size

        + number_of_screens

        + processor_name

        + number_of_cores

        + compiler_version

        + compiler_bits

        + kernel_line;

}

void FeedbackDialog::ShowErrorMessage(const QString & msg)

{

    QMessageBox msgMsg(this);

    msgMsg.setIcon(QMessageBox::Warning);

    msgMsg.setWindowTitle(QMessageBox::tr("Hedgewars - Error"));

    msgMsg.setText(msg);

    msgMsg.setWindowModality(Qt::WindowModal);

    msgMsg.exec();

}

void FeedbackDialog::ShowSpecs()

{

    QMessageBox msgMsg(this);

    msgMsg.setIcon(QMessageBox::Information);

    msgMsg.setWindowTitle(QMessageBox::tr("System Information Preview"));

    msgMsg.setText(specs);

    msgMsg.setTextFormat(Qt::PlainText);

    msgMsg.setWindowModality(Qt::WindowModal);

    msgMsg.setStyleSheet("background: #0A0533;");

    msgMsg.exec();

}

void FeedbackDialog::NetReply(QNetworkReply *reply)

{

    if (reply == genCaptchaRequest)

    {

        if (reply->error() != QNetworkReply::NoError)

        {

            qDebug() << "Error generating captcha image: " << reply->errorString();

            ShowErrorMessage(QMessageBox::tr("Failed to generate captcha"));

            return;

        }

        bool okay;

        QByteArray body = reply->readAll();

        captchaID = QString(body).toInt(&okay);

        if (!okay)

        {

            qDebug() << "Failed to get captcha ID: " << body;

            ShowErrorMessage(QMessageBox::tr("Failed to generate captcha"));

            return;

        }

        QString url = "https://hedgewars.org/feedback/?captcha&id=";

        url += QString::number(captchaID);

        QNetworkAccessManager *netManager = GetNetManager();

        QUrl captchaURL(url);

        QNetworkRequest req(captchaURL);

        captchaImageRequest = netManager->get(req);

    }

    else if (reply == captchaImageRequest)

    {

        if (reply->error() != QNetworkReply::NoError)

        {

            qDebug() << "Error loading captcha image: " << reply->errorString();

            ShowErrorMessage(QMessageBox::tr("Failed to download captcha"));

            return;

        }

        QByteArray imageData = reply->readAll();

        QPixmap pixmap;

        pixmap.loadFromData(imageData);

        label_captcha->setPixmap(pixmap);

        captcha_code->setText("");

    }

}

QNetworkAccessManager * FeedbackDialog::GetNetManager()

{

    if (netManager) return netManager;

    netManager = new QNetworkAccessManager(this);

    connect(netManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(NetReply(QNetworkReply*)));

    return netManager;

}

void FeedbackDialog::LoadCaptchaImage()

{

        QNetworkAccessManager *netManager = GetNetManager();

        QUrl captchaURL("https://hedgewars.org/feedback/?gencaptcha");

        QNetworkRequest req(captchaURL);

        genCaptchaRequest = netManager->get(req);

}

void FeedbackDialog::finishedSlot(QNetworkReply* reply)

{

    if (reply->error() == QNetworkReply::NoError)

    {

            QMessageBox infoMsg(this);

            infoMsg.setIcon(QMessageBox::Information);

            infoMsg.setWindowTitle(QMessageBox::tr("Hedgewars - Success"));

            infoMsg.setText(reply->readAll());

            infoMsg.setWindowModality(Qt::WindowModal);

            infoMsg.exec();

            accept();

            return;

    }

    else

    {

        ShowErrorMessage(QString("Error: ") + reply->readAll());

        LoadCaptchaImage();

    }

}

void FeedbackDialog::SendFeedback()

{

    // Get form data

    QString summary = this->summary->text();

    QString description = this->description->toPlainText();

    QString email = this->email->text();

    QString captchaCode = this->captcha_code->text();

    QString captchaID = QString::number(this->captchaID);

    QString version = "HedgewarsFoundation-Hedgewars-v" + *cVersionString + "_r" +

                       *cRevisionString + "|" + *cHashString;

    if (summary.isEmpty() || description.isEmpty())

    {

        ShowErrorMessage(QMessageBox::tr("Please fill out all fields. Email is optional."));

        return;

    }

    // Submit issue to PHP script

    QByteArray body;

    body.append("captcha=");

    body.append(captchaID);

    body.append("&code=");

    body.append(captchaCode);

    body.append("&version=");

    body.append(QUrl::toPercentEncoding(version));

    body.append("&title=");

    body.append(QUrl::toPercentEncoding(summary));

    body.append("&body=");

    body.append(QUrl::toPercentEncoding(description));

    body.append("&email=");

    body.append(QUrl::toPercentEncoding(email));

    if (CheckSendSpecs->isChecked())

    {

        body.append("&specs=");

        body.append(QUrl::toPercentEncoding(specs));

    }

    nam = new QNetworkAccessManager(this);

    connect(nam, SIGNAL(finished(QNetworkReply*)),

            this, SLOT(finishedSlot(QNetworkReply*)));

    QNetworkRequest header(QUrl("https://hedgewars.org/feedback/?submit"));

    header.setRawHeader("Content-Length", QString::number(body.size()).toAscii());

    header.setRawHeader("Content-Type", "application/x-www-form-urlencoded");

    nam->post(header, body);

}