/* ============================================================
* QupZilla - WebKit based browser
* Copyright (C) 2010-2012  David Rosca <nowrep@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, 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 "thememanager.h"
#include "ui_thememanager.h"
#include "mainapplication.h"
#include "globalfunctions.h"
#include "settings.h"
#include "licenseviewer.h"
#include "preferences.h"

#include <QTextBrowser>
#include <QDir>

#ifdef Q_WS_WIN
#define DEFAULT_THEME_NAME "windows"
#else
#define DEFAULT_THEME_NAME "linux"
#endif

ThemeManager::ThemeManager(QWidget* parent, Preferences* preferences)
    : QWidget()
    , ui(new Ui::ThemeManager)
    , m_preferences(preferences)
{
    ui->setupUi(parent);
    ui->license->hide();

    Settings settings;
    settings.beginGroup("Themes");
    m_activeTheme = settings.value("activeTheme", DEFAULT_THEME_NAME).toString();
    settings.endGroup();

    QDir themeDir(mApp->THEMESDIR);
    QStringList list = themeDir.entryList(QDir::AllDirs | QDir::NoDotAndDotDot);

    foreach(const QString & name, list) {
        Theme themeInfo = parseTheme(name);
        if (!themeInfo.isValid) {
            continue;
        }

        QListWidgetItem* item = new QListWidgetItem(ui->listWidget);
        item->setText(themeInfo.name + "\n" + themeInfo.shortDescription);
        item->setIcon(themeInfo.icon);
        item->setData(Qt::UserRole, name);

        if (m_activeTheme == name) {
            ui->listWidget->setCurrentItem(item);
        }

        ui->listWidget->addItem(item);
    }

    connect(ui->listWidget, SIGNAL(currentItemChanged(QListWidgetItem*, QListWidgetItem*)), this, SLOT(currentChanged()));
    connect(ui->license, SIGNAL(clicked(QPoint)), this, SLOT(showLicense()));

    currentChanged();
}

void ThemeManager::showLicense()
{
    QListWidgetItem* currentItem = ui->listWidget->currentItem();
    if (!currentItem) {
        return;
    }

    Theme currentTheme = m_themeHash[currentItem->data(Qt::UserRole).toString()];

    LicenseViewer* v = new LicenseViewer(m_preferences);
    v->setText(currentTheme.license);
    v->show();
}

void ThemeManager::currentChanged()
{
    QListWidgetItem* currentItem = ui->listWidget->currentItem();
    if (!currentItem) {
        return;
    }

    Theme currentTheme = m_themeHash[currentItem->data(Qt::UserRole).toString()];

    ui->name->setText(currentTheme.name);
    ui->author->setText(currentTheme.author);
    ui->descirption->setText(currentTheme.longDescription);
    ui->license->setHidden(currentTheme.license.isEmpty());
}

ThemeManager::Theme ThemeManager::parseTheme(const QString &name)
{
    Theme info;
    info.name = name;

    QString path = mApp->THEMESDIR + name + "/";
    if (!QFile(path + "main.css").exists() || !QFile(path + "theme.info").exists()) {
        info.isValid = false;
        return info;
    }

    if (QFile(path + "theme.png").exists()) {
        info.icon = QIcon(path + "theme.png");
    }
    else {
        info.icon = QIcon(":icons/preferences/style-default.png");
    }

    if (QFile(path + "theme.license").exists()) {
        info.license = qz_readAllFileContents(path + "theme.license");
    }

    QString theme_info = qz_readAllFileContents(path + "theme.info");

    QRegExp rx("Name:(.*)\\n");
    rx.setMinimal(true);
    rx.indexIn(theme_info);
    if (rx.captureCount() == 1) {
        info.name = rx.cap(1).trimmed();
    }

    rx.setPattern("Author:(.*)\\n");
    rx.indexIn(theme_info);
    if (rx.captureCount() == 1) {
        info.author = rx.cap(1).trimmed();
    }

    rx.setPattern("Short Description:(.*)\\n");
    rx.indexIn(theme_info);
    if (rx.captureCount() == 1) {
        info.shortDescription = rx.cap(1).trimmed();
    }

    rx.setPattern("Long Description:(.*)\\n");
    rx.indexIn(theme_info);
    if (rx.captureCount() == 1) {
        info.longDescription = rx.cap(1).trimmed();
    }

    info.isValid = true;
    m_themeHash.insert(name, info);
    return info;
}

void ThemeManager::save()
{
    Settings settings;
    settings.beginGroup("Themes");
    settings.setValue("activeTheme", ui->listWidget->currentItem()->data(Qt::UserRole));
    settings.endGroup();
}

ThemeManager::~ThemeManager()
{
    delete ui;
}