/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2012 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 */

#include "HWApplication.h"

#include <QTranslator>

#include <QLocale>

#include <QMessageBox>

#include <QPlastiqueStyle>

#include <QRegExp>

#include <QMap>

#include <QSettings>

#include <QStringListModel>

#include <QDate>

#include <QDesktopWidget>

#include <QLabel>

#include "hwform.h"

#include "hwconsts.h"

#include "newnetclient.h"

#include "DataManager.h"

#include "FileEngine.h"

#include "frontlib.h"

#ifdef _WIN32

#include <Shlobj.h>

#elif defined __APPLE__

#include "CocoaInitializer.h"

#endif

#ifndef _WIN32

#include <signal.h>

#endif

//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;

    }

    //Easter?

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

        season = SEASON_EASTER;

    else

        season = SEASON_NONE;

}

#ifndef _WIN32

void terminateFrontend(int signal)

{

    QCoreApplication::exit(0);

}

#endif

bool checkForDir(const QString & dir)

{

    QDir tmpdir(dir);

    if (!tmpdir.exists())

        if (!tmpdir.mkpath(dir))

        {

            QMessageBox directoryMsg(QApplication::activeWindow());

            directoryMsg.setIcon(QMessageBox::Warning);

            directoryMsg.setWindowTitle(QMessageBox::tr("Main - Error"));

            directoryMsg.setText(QMessageBox::tr("Cannot create directory %1").arg(dir));

            directoryMsg.setWindowModality(Qt::WindowModal);

            directoryMsg.exec();

            return false;

        }

    return true;

}

bool checkForFile(const QString & file)

{

    QFile tmpfile(file);

    if (!tmpfile.exists())

        return tmpfile.open(QFile::WriteOnly);

    else

        return true;

}

#ifdef __APPLE__

static CocoaInitializer *cocoaInit = NULL;

// Function to be called at end of program's termination on OS X to release

// the NSAutoReleasePool contained within the CocoaInitializer.

void releaseCocoaPool(void)

{

    if (cocoaInit != NULL)

    {

        delete cocoaInit;

        cocoaInit = NULL;

    }

}

#endif

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

{

#ifdef __APPLE__

    // This creates the autoreleasepool that prevents leaking, and destroys it only on exit

    cocoaInit = new CocoaInitializer();

    atexit(releaseCocoaPool);

#endif

#ifndef _WIN32

    signal(SIGINT, &terminateFrontend);

#endif

    HWApplication app(argc, argv);

    QLabel *splash = NULL;

#if defined Q_WS_WIN

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

    splash = new QLabel(0, Qt::FramelessWindowHint|Qt::WindowStaysOnTopHint);

    splash->setAttribute(Qt::WA_TranslucentBackground);

    const QRect deskSize = QApplication::desktop()->screenGeometry(-1);

    QPoint splashCenter = QPoint( (deskSize.width() - pixmap.width())/2,

                                  (deskSize.height() - pixmap.height())/2 );

    splash->move(splashCenter);

    splash->setPixmap(pixmap);

    splash->show();

#endif

    FileEngineHandler engine(argv[0]);

    flib_init();

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

    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

            {

                ++i;

            }

        }

    }

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

    {

        QFileInfo f(parsedArgs["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"]);

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

        custom_config = true;

    }

    else

    {

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

        custom_config = false;

    }

    app.setStyle(new QPlastiqueStyle());

    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() + "/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"))

    {

        QMessageBox missingMsg(QApplication::activeWindow());

        missingMsg.setIcon(QMessageBox::Critical);

        missingMsg.setWindowTitle(QMessageBox::tr("Main - Error"));

        missingMsg.setText(QMessageBox::tr("Failed to open data directory:\n%1\n\n"

                                           "Please check your installation!").

                                            arg(datadir->absolutePath()+"/Data"));

        missingMsg.setWindowModality(Qt::WindowModal);

        missingMsg.exec();

        return 1;

    }

    // setup PhysFS

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

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

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

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

    engine.mountPacks();

    checkForFile("physfs://hedgewars.ini");

    QTranslator Translator;

    {

        QSettings settings("physfs://hedgewars.ini", QSettings::IniFormat);

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

        if(cc.isEmpty())

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

        // load locale file into translator

        if(!Translator.load(QString("physfs://Locale/hedgewars_%1").arg(cc)))

            qWarning("Failed to install translation");

        app.installTranslator(&Translator);

    }

#ifdef _WIN32

    // Win32 registry setup (used for xfire detection etc. - don't set it if we're 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_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());

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

    app.form->show();

    if(splash)

        splash->close();

    int r = app.exec();

    flib_quit();

    return r;

}