/***************************************************************************
 *   Copyright (C) 2007-2021 by Ilya Kotov                                 *
 *   forkotov02@ya.ru                                                      *
 *                                                                         *
 *   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 2 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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 ***************************************************************************/

#include <QTimer>
#include <math.h>
#include "skin.h"
#include "mainvisual.h"
#include "inlines.h"
#include "shadedvisual.h"

ShadedVisual::ShadedVisual(QWidget *parent) : Visual(parent)
{
    m_skin = Skin::instance();
    m_ratio = m_skin->ratio();
    resize(m_ratio*38,m_ratio*5);
    m_pixmap = QPixmap (m_ratio*38,m_ratio*5);
    m_timer = new QTimer(this);
    connect(m_timer, SIGNAL (timeout()), this, SLOT (timeout()));
    connect(m_skin, SIGNAL(skinChanged()), this, SLOT(updateSkin()));
    m_timer->setInterval(50);
    m_timer->start();
    clear();
}

ShadedVisual::~ShadedVisual()
{}

void ShadedVisual::clear()
{
    m_l = 0;
    m_r = 0;
    m_pixmap.fill(m_skin->getVisColor(0));
    update();
}

void ShadedVisual::timeout()
{
    m_pixmap.fill(m_skin->getVisColor(0));

    if(takeData(m_left_buffer, m_right_buffer))
    {
        process();
        QPainter p(&m_pixmap);
        draw (&p);
        update();
    }
}

void ShadedVisual::start()
{
    m_running = true;
    if(isVisible())
        m_timer->start();
}

void ShadedVisual::stop()
{
    m_running = false;
    m_timer->stop();
    clear();
}

void ShadedVisual::process ()
{
    int step = (QMMP_VISUAL_NODE_SIZE << 8)/74;
    int pos = 0;
    int l = 0;
    int r = 0;

    for (int i = 0; i < 75; ++i)
    {
        pos += step;

        int j_l = abs(m_left_buffer[pos >> 8] * 8.0);
        j_l = qMin(j_l, 15);
        l = qMax(l, j_l);

        int j_r = abs(m_right_buffer[pos >> 8] * 8.0);
        j_r = qMin(j_r, 15);
        r = qMax(r, j_r);
    }
    m_l -= 0.5;
    m_l = qMax(m_l, (double)l);
    m_r -= 0.5;
    m_r = qMax(m_r, (double)r);
}

void ShadedVisual::draw (QPainter *p)
{
    for (int i = 0; i < m_l; ++i)
    {
        p->fillRect (i*3*m_ratio, 0, 3*m_ratio, 2*m_ratio, QBrush(m_skin->getVisColor (17-i)));
    }
    for (int i = 0; i < m_r; ++i)
    {
        p->fillRect (i*3*m_ratio, 3*m_ratio, 3*m_ratio, 2*m_ratio, QBrush(m_skin->getVisColor (17-i)));
    }
}

void ShadedVisual::paintEvent (QPaintEvent *)
{
    QPainter painter (this);
    painter.drawPixmap (0,0,m_pixmap);
}

void ShadedVisual::hideEvent (QHideEvent *)
{
    m_timer->stop();
}

void ShadedVisual::showEvent (QShowEvent *)
{
    if(m_running)
        m_timer->start();
}

void ShadedVisual::updateSkin()
{
    m_ratio = m_skin->ratio();
    resize(m_ratio*38,m_ratio*5);
    m_pixmap = QPixmap (m_ratio*38,m_ratio*5);
    clear();
}