/*

 * 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 "HWApplication.h"

#include <QTranslator>

#include <QLocale>

#include <QRegExp>

#include <QMap>

#include <QSettings>

#include <QStringListModel>

#include <QDate>

#include <QDesktopWidget>

#include <QLabel>

#include <QLibraryInfo>

#include <QStyle>

#include <QStyleFactory>

#include "hwform.h"

#include "hwconsts.h"

#include "newnetclient.h"

#include "DataManager.h"

#include "FileEngine.h"

#include "MessageDialog.h"

#include "SDLInteraction.h"

#ifdef _WIN32

#include <Shlobj.h>

#elif defined __APPLE__

#include "CocoaInitializer.h"

#endif

#ifdef Q_OS_WIN

#include <QSplashScreen>

#endif

#include <QMessageBox>

// Program resources

#ifdef __APPLE__

static CocoaInitializer * cocoaInit = NULL;

#endif

static FileEngineHandler * engine = NULL;

//Determines the day of easter in year

//from http://aa.usno.navy.mil/faq/docs/easter.php,adapted to C/C++

QDate calculateEaster(long year)

{

    int c, n, k, i, j, l, m, d;

    c = year/100;

    n = year - 19*(year/19);

    k = (c - 17)/25;

    i = c - c/4 - (c - k)/3 + 19*n + 15;

    i = i - 30*(i/30);

    i = i - (i/28)*(1 - (i/28)*(29/(i + 1))*((21 - n)/11));

    j = year + year/4 + i + 2 - c + c/4;

    j = j - 7*(j/7);

    l = i - j;

    m = 3 + (l + 40)/44;

    d = l + 28 - 31*(m / 4);

    return QDate(year, m, d);

}

//Checks season and assigns it to the variable season in "hwconsts.h"

void checkSeason()

{

    QDate date = QDate::currentDate();

    //Christmas?

    if (date.month() == 12 && date.day() >= 24

            && date.day() <= 26)

        season = SEASON_CHRISTMAS;

    //Hedgewars birthday?

    else if (date.month() == 10 && date.day() == 31)

    {

        season = SEASON_HWBDAY;

        years_since_foundation = date.year() - 2004;

    }

    else if (date.month() == 4 && date.day() == 1)

    {

        season = SEASON_APRIL1;

    }

    //Easter?

    else if (calculateEaster(date.year()) == date)

        season = SEASON_EASTER;

    else

        season = SEASON_NONE;

}

bool checkForDir(const QString & dir)

{

    QDir tmpdir(dir);

    if (!tmpdir.exists())

        if (!tmpdir.mkpath(dir))

        {

            MessageDialog::ShowErrorMessage(HWApplication::tr("Cannot create directory %1").arg(dir));

            return false;

        }

    return true;

}

// Guaranteed to be the last thing ran in the application's life time.

// Closes resources that need to exist as long as possible.

void closeResources(void)

{

#ifdef __APPLE__

    if (cocoaInit != NULL)

    {

        delete cocoaInit;

        cocoaInit = NULL;

    }

#endif

    if (engine != NULL)

    {

        delete engine;

        engine = NULL;

    }

}

QString getUsage()

{

    return QString(

"%1: hedgewars [%2...] [%3]\n"

"\n"

"%4:\n"

"  --help              %5\n"

"  --config-dir=PATH   %6\n"

"  --data-dir=PATH     %7\n"

"\n"

"%8"

"\n"

).arg(HWApplication::tr("Usage", "command-line"))

.arg(HWApplication::tr("OPTION", "command-line"))

.arg(HWApplication::tr("CONNECTSTRING", "command-line"))

.arg(HWApplication::tr("Options", "command-line"))

.arg(HWApplication::tr("Display this help", "command-line"))

.arg(HWApplication::tr("Custom path for configuration data and user data", "command-line"))

.arg(HWApplication::tr("Custom path to the game data folder", "command-line"))

.arg(HWApplication::tr("Hedgewars can use a %1 (e.g. \"%2\") to connect on start.", "command-line").arg(HWApplication::tr("CONNECTSTRING", "command-line")).arg(QString("hwplay://") + NETGAME_DEFAULT_SERVER));

}

int main(int argc, char *argv[]) {

    /* Qt5 Base removed Motif, Plastique. These are now in the Qt style plugins

    (Ubuntu: qt5-style-plugins, which was NOT backported by Debian/Ubuntu to stable/LTS).

    Windows appears to render best of the remaining options but still isn't quite right. */

    // Try setting Plastique if available

    QStyle* coreStyle;

    coreStyle = QStyleFactory::create("Plastique");

    if(coreStyle != 0) {

        QApplication::setStyle(coreStyle);

        qDebug("Qt style set: Plastique");

    } else {

        // Use Windows as fallback.

        // FIXME: Under Windows style, some widgets like scrollbars don't render as nicely

        coreStyle = QStyleFactory::create("Windows");

        if(coreStyle != 0) {

            QApplication::setStyle(coreStyle);

            qDebug("Qt style set: Windows");

        } else {

            // Windows style should not be missing in Qt5 Base. If it does, something went terribly wrong!

            qWarning("No Qt style could be set! Using the default one.");

        }

    }

    // Since we're calling this first, closeResources() will be the last thing called after main() returns.

    atexit(closeResources);

#ifdef __APPLE__

    cocoaInit = new CocoaInitializer(); // Creates the autoreleasepool preventing cocoa object leaks on OS X.

#endif

    SDLInteraction::instance();

    HWApplication app(argc, argv);

    app.setAttribute(Qt::AA_DontShowIconsInMenus,false);

    // file engine, to be initialized later

    engine = NULL;

    // parse arguments

    QStringList arguments = app.arguments();

    QMap<QString, QString> parsedArgs;

    {

        QList<QString>::iterator i = arguments.begin();

        while(i != arguments.end())

        {

            QString arg = *i;

            QRegExp opt("--(\\S+)=(.+)");

            if(opt.exactMatch(arg))

            {

                parsedArgs[opt.cap(1)] = opt.cap(2);

                i = arguments.erase(i);

            }

            else

            {

                if(arg.startsWith("--")) {

                    if(arg == "--help")

                    {

                        printf("%s", getUsage().toUtf8().constData());

                        return 0;

                    }

                    // argument is something wrong

                    fprintf(stderr, "%s\n\n%s",

                        HWApplication::tr("Malformed option argument: %1", "command-line").arg(arg).toUtf8().constData(),

                        getUsage().toUtf8().constData());

                    return 1;

                }

                // if not starting with --, then always skip

                // (because we can't determine if executable path/call or not - on windows)

                ++i;

            }

        }

    }

    if(parsedArgs.contains("data-dir"))

    {

        QFileInfo f(parsedArgs["data-dir"]);

        parsedArgs.remove("data-dir");

        if(!f.exists())

        {

            qWarning() << "WARNING: Cannot open DATA_PATH=" << f.absoluteFilePath();

        }

        *cDataDir = f.absoluteFilePath();

        custom_data = true;

    }

    if(parsedArgs.contains("config-dir"))

    {

        QFileInfo f(parsedArgs["config-dir"]);

        parsedArgs.remove("config-dir");

        cfgdir->setPath(f.absoluteFilePath());

        custom_config = true;

    }

    else

    {

        cfgdir->setPath(QDir::homePath());

        custom_config = false;

    }

    if (!parsedArgs.isEmpty()) {

        foreach (const QString & key, parsedArgs.keys())

        {

            fprintf(stderr, "%s\n", HWApplication::tr("Unknown option argument: %1", "command-line").arg(QString("--") + key).toUtf8().constData());

        }

        fprintf(stderr, "\n%s", getUsage().toUtf8().constData());

        return 1;

    }

    // end of parameter parsing

#ifdef Q_OS_WIN

    QPixmap pixmap(":/res/splash.png");

    QSplashScreen splash(pixmap);

    splash.show();

#endif

    QDateTime now = QDateTime::currentDateTime();

    srand(now.toTime_t());

    rand();

    Q_INIT_RESOURCE(hedgewars);

    qRegisterMetaType<HWTeam>("HWTeam");

    bindir->cd(QCoreApplication::applicationDirPath());

    if(custom_config == false)

    {

#ifdef __APPLE__

        checkForDir(cfgdir->absolutePath() + "/Library/Application Support/Hedgewars");

        cfgdir->cd("Library/Application Support/Hedgewars");

#elif defined _WIN32

        char path[1024];

        if(!SHGetFolderPathA(0, CSIDL_PERSONAL, NULL, 0, path))

        {

            cfgdir->cd(path);

            checkForDir(cfgdir->absolutePath() + "/Hedgewars");

            cfgdir->cd("Hedgewars");

        }

        else // couldn't retrieve documents folder? almost impossible, but in case fall back to classic path

        {

            checkForDir(cfgdir->absolutePath() + "/.hedgewars");

            cfgdir->cd(".hedgewars");

        }

#else

        checkForDir(cfgdir->absolutePath() + "/.hedgewars");

        cfgdir->cd(".hedgewars");

#endif

    }

    if (checkForDir(cfgdir->absolutePath()))

    {

        // alternative loading/lookup paths

        checkForDir(cfgdir->absolutePath() + "/Data");

        // config/save paths

        checkForDir(cfgdir->absolutePath() + "/Demos");

        checkForDir(cfgdir->absolutePath() + "/DrawnMaps");

        checkForDir(cfgdir->absolutePath() + "/Saves");

        checkForDir(cfgdir->absolutePath() + "/Screenshots");

        checkForDir(cfgdir->absolutePath() + "/Teams");

        checkForDir(cfgdir->absolutePath() + "/Logs");

        checkForDir(cfgdir->absolutePath() + "/Videos");

        checkForDir(cfgdir->absolutePath() + "/VideoTemp");

    }

    datadir->cd(bindir->absolutePath());

    datadir->cd(*cDataDir);

    if (!datadir->cd("Data"))

    {

        MessageDialog::ShowFatalMessage(HWApplication::tr("Failed to open data directory:\n%1\n\nPlease check your installation!").arg(datadir->absolutePath()+"/Data"));

        return 1;

    }

    bool isProbablyNewPlayer = false;

    // setup PhysFS

    engine = new FileEngineHandler(argv[0]);

    engine->mount(datadir->absolutePath());

    engine->mount(cfgdir->absolutePath() + "/Data");

    engine->mount(cfgdir->absolutePath());

    engine->setWriteDir(cfgdir->absolutePath());

    engine->mountPacks();

    QTranslator TranslatorHedgewars;

    QTranslator TranslatorQt;

    {

        QSettings settings(DataManager::instance().settingsFileName(), QSettings::IniFormat);

        settings.setIniCodec("UTF-8");

        // Heuristic to figure out if the user is (probably) a first-time player.

        // If nickname is not set, then probably yes.

        // The hidden setting firstLaunch is, if present, used to force HW to

        // treat iself as if it were launched the first time.

        QString nick = settings.value("net/nick", QString()).toString();

        if (settings.contains("frontend/firstLaunch"))

        {

            isProbablyNewPlayer = settings.value("frontend/firstLaunch").toBool();

        }

        else

        {

            isProbablyNewPlayer = nick.isNull();

        }

        // Set firstLaunch to false to make sure we remember we have been launched before.

        settings.setValue("frontend/firstLaunch", false);

        QString cc = settings.value("misc/locale", QString()).toString();

        if (cc.isEmpty())

        {

            cc = QLocale::system().name();

            qDebug("Detected system locale: %s", qPrintable(cc));

            // Fallback to current input locale if "C" locale is returned

            if(cc == "C")

                cc = HWApplication::inputMethod()->locale().name();

        }

        else

        {

            qDebug("Configured frontend locale: %s", qPrintable(cc));

        }

        QLocale::setDefault(cc);

        QString defaultLocaleName = QLocale().name();

        qDebug("Frontend uses locale: %s", qPrintable(defaultLocaleName));

        if (defaultLocaleName != "C")

        {

            // Load locale files into translators

            if (!TranslatorHedgewars.load(QLocale(), "hedgewars", "_", QString("physfs://Locale")))

                qWarning("Failed to install Hedgewars translation (%s)", qPrintable(defaultLocaleName));

            if (!TranslatorQt.load(QLocale(), "qt", "_", QString(QLibraryInfo::location(QLibraryInfo::TranslationsPath))))

                qWarning("Failed to install Qt translation (%s)", qPrintable(defaultLocaleName));

            app.installTranslator(&TranslatorHedgewars);

            app.installTranslator(&TranslatorQt);

        }

        app.setLayoutDirection(QLocale().textDirection());

    }

#ifdef _WIN32

    // Win32 registry setup (used for external software detection etc.

    // don't set it if running in "portable" mode with a custom config dir)

    if(!custom_config)

    {

        QSettings registry_hklm("HKEY_LOCAL_MACHINE", QSettings::NativeFormat);

        registry_hklm.setValue("Software/Hedgewars/Frontend", bindir->absolutePath().replace("/", "\\") + "\\hedgewars.exe");

        registry_hklm.setValue("Software/Hedgewars/Path", bindir->absolutePath().replace("/", "\\"));

    }

#endif

    QString style = "";

    QString fname;

    checkSeason();

    //For each season, there is an extra stylesheet

    //Todo: change background for easter and birthday

    //(simply replace res/BackgroundBirthday.png and res/BackgroundEaster.png

    //with an appropriate background

    switch (season)

    {

        case SEASON_CHRISTMAS :

            fname = "christmas.css";

            break;

        case SEASON_APRIL1 :

            fname = "april1.css";

            break;

        case SEASON_EASTER :

            fname = "easter.css";

            break;

        case SEASON_HWBDAY :

            fname = "birthday.css";

            break;

        default :

            fname = "qt.css";

            break;

    }

    // load external stylesheet if there is any

    QFile extFile("physfs://css/" + fname);

    QFile resFile(":/res/css/" + fname);

    QFile & file = (extFile.exists() ? extFile : resFile);

    if (file.open(QIODevice::ReadOnly | QIODevice::Text))

        style.append(file.readAll());

    qWarning("Starting Hedgewars %s-r%d (%s)", qPrintable(*cVersionString), cRevisionString->toInt(), qPrintable(*cHashString));

    app.form = new HWForm(NULL, style);

#ifdef Q_OS_WIN

    splash.finish(app.form);

#endif

    app.form->show();

    // Show welcome message for (suspected) first-time player and

    // point towards the Training menu.

    if(isProbablyNewPlayer) {

        QMessageBox questionTutorialMsg(app.form);

        questionTutorialMsg.setIcon(QMessageBox::Question);

        questionTutorialMsg.setWindowTitle(QMessageBox::tr("Welcome to Hedgewars"));

        questionTutorialMsg.setText(QMessageBox::tr("Welcome to Hedgewars!\n\nYou seem to be new around here. Would you like to play some training missions first to learn the basics of Hedgewars?"));

        questionTutorialMsg.setWindowModality(Qt::WindowModal);

        questionTutorialMsg.addButton(QMessageBox::Yes);

        questionTutorialMsg.addButton(QMessageBox::No);

        int answer = questionTutorialMsg.exec();

        if (answer == QMessageBox::Yes) {

            app.form->GoToTraining();

        }

    }

    if (app.urlString)

        app.fakeEvent();

    return app.exec();

}