/*
 * Copyright 2009 Ben Boeckel <MathStuf@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/>.
 */

// Header include
#include "PluginModel.h"

// Sigtools includes
#include "ClassModel.h"
#include "PluginTypeModel.h"

// Sigencore includes
#include <sigencore/plugins/ArenaPlugin.h>
#include <sigencore/plugins/CanvasPlugin.h>

// KDE includes
#include <KColorScheme>
#include <KGlobalSettings>
#include <KIcon>
#include <KMessageBox>
#include <KPluginInfo>

// Qt includes
#include <QtGui/QPainter>

using namespace Sigencore::Interfaces;
using namespace Sigtools;

PluginModel::PluginModel(KService::Ptr service, PluginTypeModel* parent) :
        BaseModel(parent),
        m_service(service),
        m_info(new KPluginInfo(m_service))
{
    KPluginLoader loader(m_service->library());
    KPluginFactory *factory = loader.factory();
    
    if (!factory)
    {
        KMessageBox::error(NULL, QString("The plugin of type \"%1\" with name \"%2\" is not a valid Sigen plugin. The error was:\n%3").arg(m_service->serviceTypes()[0]).arg(m_service->name()).arg(loader.errorString()), "Plugin loading error");
        return;
    }
    
    const QStringList types = m_service->serviceTypes();
    foreach (const QString& type, types)
    {
        if (type == "Sigen/Arena")
        {
            ArenaPlugin* plugin = factory->create<ArenaPlugin>(this);
            if (plugin)
            {
                QStringList arenas = plugin->arenas();
                foreach (const QString& arena, arenas)
                    m_classes.append(new ClassModel(plugin->icon(arena), arena, plugin->description(arena), this));
            }
        }
        else if (type == "Sigen/Canvas")
        {
            CanvasPlugin* plugin = factory->create<CanvasPlugin>(this);
            if (plugin)
            {
                QStringList canvases = plugin->canvases();
                foreach (const QString& canvas, canvases)
                    m_classes.append(new ClassModel(plugin->icon(canvas), canvas, plugin->description(canvas), this));
            }
        }
        else
            KMessageBox::information(NULL, QString("The plugin type \"%1\" is not supported.").arg(m_service->type()), "Unsupported plugin type");
    }
}

int PluginModel::rowCount() const
{
    return m_classes.size();
}

Qt::ItemFlags PluginModel::flags() const
{
    return Qt::ItemIsEnabled;
}

BaseModel* PluginModel::childItem(const int row)
{
    if ((0 <= row) && (row < m_classes.size()))
        return m_classes[row];
    return NULL;
}

int PluginModel::findChild(BaseModel* model) const
{
    return m_classes.indexOf(qobject_cast<ClassModel*>(model));
}

void PluginModel::redraw(const int width) const
{
    QFont regFont = KGlobalSettings::generalFont();
    QFontMetrics regMetrics(regFont);
    QFont smallFont = KGlobalSettings::smallestReadableFont();
    smallFont.setItalic(true);
    QFontMetrics smallMetrics(smallFont);
    
    QSize nameSize = regMetrics.size(0, m_info->name());
    QSize authorSize = smallMetrics.size(0, QString("by %1").arg(m_info->author()));
    QSize versionSize = regMetrics.size(0, m_info->version());
    
    int row1width;
    int row1height;
    
    row1height = qMax(nameSize.height(), qMax(authorSize.height(), versionSize.height()));
    row1width = row1height + nameSize.width() + authorSize.width() + versionSize.width();
    
    QSize websiteSize = smallMetrics.size(0, m_info->website());
    
    int maxWidth = qMax(qMax(row1width + 4 * horizSpacing, websiteSize.width()), width - 2 * borderWidth);
    
    QSize commentSize = smallMetrics.boundingRect(QRect(0, 0, maxWidth, 0), Qt::TextWordWrap, m_info->comment()).size();
    
    int maxHeight = row1height + websiteSize.height() + commentSize.height() + 2 * vertSpacing;
    
    int h = borderWidth;
    int w = borderWidth;
    
    m_pixmap = QPixmap(maxWidth + 2 * borderWidth, maxHeight + 2 * borderWidth);
    m_pixmap.fill(KStatefulBrush(KColorScheme::View, KColorScheme::NormalBackground).brush(QPalette::Normal).color());
    QPainter painter(&m_pixmap);
    
    painter.drawPixmap(w, h, KIcon(m_info->icon()).pixmap(row1height, row1height));
    
    w += row1height;
    w += horizSpacing;
    
    painter.drawText(QRect(QPoint(w, h), QSize(row1width - w, row1height)), Qt::AlignBottom | Qt::AlignLeft, m_info->name());
    
    w += nameSize.width();
    w += 2 * horizSpacing;
    
    painter.setFont(smallFont);
    painter.drawText(QRect(QPoint(w, h), QSize(row1width - w, row1height)), Qt::AlignBottom | Qt::AlignLeft, QString("by %1").arg(m_info->author()));
    
    w += authorSize.width();
    w += horizSpacing;
    
    painter.setFont(regFont);
    painter.drawText(QRect(QPoint(w, h), QSize(maxWidth - w, row1height)), Qt::AlignBottom | Qt::AlignRight, m_info->version());
    
    h += row1height;
    h += vertSpacing;
    w = borderWidth;
    
    painter.setFont(smallFont);
    painter.drawText(QRect(QPoint(w, h), websiteSize), Qt::AlignBottom | Qt::AlignLeft, m_info->website());
    
    h += websiteSize.height();
    h += vertSpacing;
    
    painter.drawText(QRect(QPoint(w, h), commentSize), Qt::AlignTop | Qt::AlignLeft | Qt::TextWordWrap, m_info->comment());
}