// -*- Mode: c++ -*-
/* ============================================================
 * File  : imageview.cpp
 * Description : 
 * 
 * Copyright 2004-2006 Renchi Raju, Daniel Kristjansson
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published bythe Free Software Foundation;
 * either version 2, 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.
 * 
 * ============================================================ */

// Qt headers
#include <QDir>

// MythTV plugin headers
#include <mythtv/mythcontext.h>
#include <mythtv/lcddevice.h>
#include <mythtv/libmythui/mythuihelper.h>

// MythGallery headers
#include "imageview.h"
#include "galleryutil.h"
#include "thumbgenerator.h"

ImageView::ImageView(const ThumbList &itemList,
                     int *pos, int slideShow, int sortorder)
    : m_screenSize(640,480),
      m_wmult(1.0f),
      m_hmult(1.0f),
      m_pos(*pos),
      m_savedPos(pos),
      m_itemList(itemList),
      m_movieState(0),
      m_zoom(1.0f),

      // Info variables
      m_info_show(false),
      m_info_show_short(false),

      // Common slideshow variables
      m_slideshow_running(false),
      m_slideshow_sequencing(slideShow),
      m_slideshow_sequencing_inc_order(sortorder),
      m_slideshow_sequence(NULL),
      m_slideshow_frame_delay(2),
      m_slideshow_frame_delay_state(m_slideshow_frame_delay * 1000),
      m_slideshow_timer(NULL),

      // Common effect state variables
      m_effect_running(false),
      m_effect_current_frame(0),
      m_effect_method(QString::null),
      m_effect_random(false)
{

    int xbase, ybase, screenwidth, screenheight;
    GetMythUI()->GetScreenSettings(xbase, screenwidth,  m_wmult,
                                ybase, screenheight, m_hmult);
    m_screenSize = QSize(screenwidth, screenheight);

    // --------------------------------------------------------------------

    bool recurse = gContext->GetNumSetting("GalleryRecursiveSlideshow", 0);

    ThumbItem *origItem = NULL;
    if (m_pos < m_itemList.size())
        origItem = m_itemList.at(m_pos);

    // FIXME this looks wrong
    //remove all dirs from m_itemList;
    ThumbItem *item;
    for (int x = 0; x < m_itemList.size(); x++)
    {
        item = m_itemList.at(x);
        if (item->IsDir())
        {
            if (recurse)
                GalleryUtil::LoadDirectory(m_itemList, item->GetPath(),
                                           sortorder, recurse, NULL, NULL);
            m_itemList.takeAt(x);
        }
    }

    // --------------------------------------------------------------------

    // since we remove dirs item position might have changed
    if (origItem) 
        m_pos = m_itemList.indexOf(origItem);

    m_pos = (!origItem || (m_pos == -1)) ? 0 : m_pos;

    // --------------------------------------------------------------------

    m_slideshow_frame_delay = gContext->GetNumSetting("SlideshowDelay", 0);
    m_slideshow_frame_delay = (!m_slideshow_frame_delay) ?
        2 : m_slideshow_frame_delay;
    m_slideshow_frame_delay_state = m_slideshow_frame_delay * 1000;

    // --------------------------------------------------------------------

    if (slideShow > 1)
    {
        m_slideshow_sequence = new SequenceShuffle(m_itemList.size());
        m_slideshow_mode = "Random Slideshow";
        m_pos = 0;
    }
    else
    {
        m_slideshow_sequence = new SequenceInc(m_itemList.size());
        m_slideshow_mode = "Slideshow";
    }

    m_pos = m_slideshow_sequence->index(m_pos);
}

ImageView::~ImageView()
{
    UpdateLCD(NULL);

    if (m_slideshow_sequence)
    {
        delete m_slideshow_sequence;
        m_slideshow_sequence = NULL;
    }

    *m_savedPos = m_pos;
}

QString ImageView::GetRandomEffect(void) const
{
    QMap<QString,QString> tmpMap = m_effect_map;
    tmpMap.remove("none");
    QStringList t = tmpMap.keys();
    int i = (int) ( (float)(t.count()) * rand() / (RAND_MAX + 1.0f) );
    return tmpMap[t[i]];
}

void ImageView::UpdateLCD(const ThumbItem *item)
{
    LCD *lcd = LCD::Get();
    if (!lcd)
        return;

    if (!item)
    {
        lcd->switchToTime();
        return;
    }

    QString name = item->GetName();
    QString desc = QString::number(m_pos + 1) + " / " +
        QString::number(m_itemList.size());

    QList<LCDTextItem> textItems;
    textItems.append(LCDTextItem(
                         1, ALIGN_CENTERED, name, "Generic", true));
    textItems.append(LCDTextItem(
                         2, ALIGN_CENTERED, desc, "Generic", false));

    lcd->switchToGeneric(textItems);
}

QString ImageView::GetDescriptionStatus(void) const
{
    if (m_slideshow_running)
        return " [" + QObject::tr(m_slideshow_mode) + "]";

    return "";
}

void ImageView::GetScreenShot(QImage& image, const ThumbItem *item)
{
    QFileInfo fi(item->GetPath());
    QString screenshot = QString("%1%2-screenshot.jpg")
                                .arg(ThumbGenerator::getThumbcacheDir(fi.path()))
                                .arg(item->GetName());

    if (QFile::exists(screenshot))
    {
        QImage img(screenshot);
        image = img;
    }
    else
    {
        QImage *img = GetMythUI()->LoadScaleImage("gallery-moviethumb.png");
        if (img)
        {
            image = *img;
        }
    }
}
