/*

 * Hedgewars, a free turn based strategy game

 *

 * 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 "hwform.h"

#include "hwconsts.h"

#include "HWDataManager.h"

#ifdef _WIN32

#include <Shlobj.h>

#endif

#ifdef __APPLE__

#include "CocoaInitializer.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;

}

bool checkForDir(const QString & dir)

{

    QDir tmpdir;

    if (!tmpdir.exists(dir))

        if (!tmpdir.mkdir(dir))

        {

            QMessageBox::critical(0,

                                  QObject::tr("Error"),

                                  QObject::tr("Cannot create directory %1").arg(dir),

                                  QObject::tr("OK"));

            return false;

        }

    return true;

}

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

{

    HWApplication app(argc, argv);

    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"]);

        *cConfigDir = f.absoluteFilePath();

        custom_config = true;

    }

    app.setStyle(new QPlastiqueStyle);

    QDateTime now = QDateTime::currentDateTime();

    srand(now.toTime_t());

    rand();

    Q_INIT_RESOURCE(hedgewars);

    bindir->cd("bin"); // workaround over NSIS installer

    if(cConfigDir->length() == 0)

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

    else

        cfgdir->setPath(*cConfigDir);

    if(cConfigDir->length() == 0)

    {

#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");

    }

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

    datadir->cd(*cDataDir);

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

    {

        QMessageBox::critical(0, QMessageBox::tr("Error"),

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

                                              "Please check your installation").

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

        return 1;

    }

    HWDataManager & dataMgr = HWDataManager::instance();

    {

        QStringList themes;

        themes.append(dataMgr.entryList(

                          "Themes",

                          QDir::AllDirs | QDir::NoDotAndDotDot)

                     );

        QList<QPair<QIcon, QIcon> > icons;

        themes.sort();

        for(int i = themes.size() - 1; i >= 0; --i)

        {

            QString file = dataMgr.findFileForRead(

                               QString("Themes/%1/icon.png").arg(themes.at(i))

                           );

            if(QFile::exists(file))

            {

                // load icon

                QPair<QIcon, QIcon> ic;

                ic.first = QIcon(file);

                // load preview icon

                ic.second = QIcon(

                                dataMgr.findFileForRead(

                                    QString("Themes/%1/icon@2x.png").arg(themes.at(i))

                                )

                            );

                icons.prepend(ic);

            }

            else

            {

                themes.removeAt(i);

            }

        }

        themesModel = new ThemesModel(themes);

        Q_ASSERT(themes.size() == icons.size());

        for(int i = 0; i < icons.size(); ++i)

        {

            themesModel->setData(themesModel->index(i), icons[i].first, Qt::DecorationRole);

            themesModel->setData(themesModel->index(i), icons[i].second, Qt::UserRole);

        }

    }

    mapList = new QStringList(dataMgr.entryList(

                                  QString("Maps"),

                                  QDir::Dirs | QDir::NoDotAndDotDot

                              )

                             );

    scriptList = new QStringList(dataMgr.entryList(

                                     QString("Scripts/Multiplayer"),

                                     QDir::Files,

                                     QStringList("*.lua")

                                 )

                                );

    QTranslator Translator;

    {

        QSettings settings(cfgdir->absolutePath() + "/hedgewars.ini", QSettings::IniFormat);

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

        if(cc.isEmpty())

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

        // load locale file into translator

        Translator.load(

            dataMgr.findFileForRead(

                QString("Locale/hedgewars_" + cc)

            )

        );

        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

#ifdef __APPLE__

    // this creates the autoreleasepool that prevents leaking

    CocoaInitializer initializer;

#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";

    }

    // load external stylesheet if there is any

    QFile extFile(dataMgr.findFileForRead("css/" + fname));

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

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

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

    {

        QTextStream in(&file);

        while (!in.atEnd())

        {

            QString line = in.readLine();

            if(!line.isEmpty())

                style.append(line);

        }

    }

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

    app.form->show();

    return app.exec();

}