/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */

/*
    Rosegarden
    A MIDI and audio sequencer and musical notation editor.
 
    This program is Copyright 2000-2008
        Guillaume Laurent   <glaurent@telegraph-road.org>,
        Chris Cannam        <cannam@all-day-breakfast.com>,
        Richard Bown        <richard.bown@ferventsoftware.com>
 
    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
    Bown to claim authorship of this work have been asserted.
 
    Other copyrights also apply to some parts of this work.  Please
    see the AUTHORS file and individual file headers for details.
 
    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.  See the file
    COPYING included with this distribution for more information.
*/


#include "AudioSplitDialog.h"
#include <kapplication.h>

#include <klocale.h>
#include "misc/Debug.h"
#include "misc/Strings.h"
#include "base/Exception.h"
#include "base/RealTime.h"
#include "base/Segment.h"
#include "document/RosegardenGUIDoc.h"
#include "gui/application/RosegardenApplication.h"
#include "sound/AudioFileManager.h"
#include <kdialogbase.h>
#include <tqcanvas.h>
#include <tqhbox.h>
#include <tqlabel.h>
#include <tqpalette.h>
#include <tqscrollview.h>
#include <tqspinbox.h>
#include <tqstring.h>
#include <tqvbox.h>
#include <tqwidget.h>


namespace Rosegarden
{

AudioSplitDialog::AudioSplitDialog(TQWidget *parent,
                                   Segment *segment,
                                   RosegardenGUIDoc *doc):
        KDialogBase(parent, 0, true,
                    i18n("Autosplit Audio Segment"), Ok | Cancel),
        m_doc(doc),
        m_segment(segment),
        m_canvasWidth(500),
        m_canvasHeight(200),
        m_previewWidth(400),
        m_previewHeight(100)
{
    if (!segment || segment->getType() != Segment::Audio)
        reject();

    TQVBox *w = makeVBoxMainWidget();

    new TQLabel(i18n("AutoSplit Segment \"") +
               strtoqstr(m_segment->getLabel()) + TQString("\""), w);

    m_canvas = new TQCanvas(TQT_TQOBJECT(w));
    m_canvas->resize(m_canvasWidth, m_canvasHeight);
    m_canvasView = new TQCanvasView(m_canvas, w);
    m_canvasView->setFixedWidth(m_canvasWidth);
    m_canvasView->setFixedHeight(m_canvasHeight);

    m_canvasView->setHScrollBarMode(TQScrollView::AlwaysOff);
    m_canvasView->setVScrollBarMode(TQScrollView::AlwaysOff);
    m_canvasView->setDragAutoScroll(false);

    TQHBox *hbox = new TQHBox(w);
    new TQLabel(i18n("Threshold"), hbox);
    m_thresholdSpin = new TQSpinBox(hbox);
    m_thresholdSpin->setSuffix(" %");
    connect(m_thresholdSpin, TQT_SIGNAL(valueChanged(int)),
            TQT_SLOT(slotThresholdChanged(int)));

    // ensure this is cleared
    m_previewBoxes.clear();

    // Set thresholds
    //
    int threshold = 1;
    m_thresholdSpin->setValue(threshold);
    drawPreview();
    drawSplits(1);
}

void
AudioSplitDialog::drawPreview()
{
    // Delete everything on the canvas
    //
    TQCanvasItemList list = m_canvas->allItems();
    for (TQCanvasItemList::Iterator it = list.begin(); it != list.end(); it++)
        delete *it;

    // empty the preview boxes
    m_previewBoxes.erase(m_previewBoxes.begin(), m_previewBoxes.end());

    // Draw a bounding box
    //
    int border = 5;
    TQCanvasRectangle *rect = new TQCanvasRectangle(m_canvas);
    rect->setSize(m_canvasWidth - border * 2, m_canvasHeight - border * 2);
    rect->setX(border);
    rect->setY(border);
    rect->setZ(1);
    rect->setPen(kapp->palette().color(TQPalette::Active, TQColorGroup::Dark));
    rect->setBrush(kapp->palette().color(TQPalette::Active, TQColorGroup::Base));
    rect->setVisible(true);

    // Get preview in vector form
    //
    AudioFileManager &aFM = m_doc->getAudioFileManager();
    int channels = aFM.getAudioFile(m_segment->getAudioFileId())->getChannels();

    std::vector<float> values;

    try {
        values = aFM.getPreview(m_segment->getAudioFileId(),
                                m_segment->getAudioStartTime(),
                                m_segment->getAudioEndTime(),
                                m_previewWidth,
                                false);
    } catch (Exception e) {
        TQCanvasText *text = new TQCanvasText(m_canvas);
        text->setColor(kapp->palette().
                       color(TQPalette::Active, TQColorGroup::Shadow));
        text->setText(i18n("<no preview generated for this audio file>"));
        text->setX(30);
        text->setY(30);
        text->setZ(4);
        text->setVisible(true);
        m_canvas->update();
        return ;
    }

    int startX = (m_canvasWidth - m_previewWidth) / 2;
    int halfHeight = m_canvasHeight / 2;
    float h1, h2;
    std::vector<float>::iterator it = values.begin();

    // Draw preview
    //
    for (int i = 0; i < m_previewWidth; i++) {
        if (channels == 1) {
            h1 = *(it++);
            h2 = h1;
        } else {
            h1 = *(it++);
            h2 = *(it++);
        }


        int startY = halfHeight + int(h1 * float(m_previewHeight / 2));
        int endY = halfHeight - int(h2 * float(m_previewHeight / 2));

        if ( startY < 0 ) {
            RG_DEBUG << "AudioSplitDialog::AudioSplitDialog - "
            << "startY - out of negative range"
            << endl;
            startY = 0;
        }

        if (endY < 0) {
            RG_DEBUG << "AudioSplitDialog::AudioSplitDialog - "
            << "endY - out of negative range"
            << endl;
            endY = 0;
        }

        TQCanvasLine *line = new TQCanvasLine(m_canvas);
        line->setPoints(startX + i,
                        startY,
                        startX + i,
                        endY);
        line->setZ(3);
        line->setPen(kapp->
                     palette().color(TQPalette::Active, TQColorGroup::Shadow));
        line->setBrush(kapp->
                       palette().color(TQPalette::Active, TQColorGroup::Shadow));
        line->setVisible(true);

    }

    // Draw zero dc line
    //
    rect = new TQCanvasRectangle(m_canvas);
    rect->setX(startX);
    rect->setY(halfHeight - 1);
    rect->setSize(m_previewWidth, 2);
    rect->setPen(kapp->palette().color(TQPalette::Active, TQColorGroup::Shadow));
    rect->setBrush(kapp->palette().color(TQPalette::Active, TQColorGroup::Shadow));
    rect->setZ(4);
    rect->setVisible(true);

    // Start time
    //
    char msecs[100];
    sprintf(msecs, "%03d", m_segment->getAudioStartTime().msec());
    TQString startText = TQString("%1.%2s")
                        .tqarg(m_segment->getAudioStartTime().sec)
                        .tqarg(msecs);
    TQCanvasText *text = new TQCanvasText(m_canvas);
    text->setColor(
        kapp->palette().color(TQPalette::Active, TQColorGroup::Shadow));
    text->setText(startText);
    text->setX(startX - 20);
    text->setY(m_canvasHeight / 2 - m_previewHeight / 2 - 35);
    text->setZ(3);
    text->setVisible(true);

    rect = new TQCanvasRectangle(m_canvas);
    rect->setX(startX - 1);
    rect->setY(m_canvasHeight / 2 - m_previewHeight / 2 - 14);
    rect->setSize(1, m_previewHeight + 28);
    rect->setPen(kapp->palette().color(TQPalette::Active, TQColorGroup::Shadow));
    rect->setZ(3);
    rect->setVisible(true);

    // End time
    //
    sprintf(msecs, "%03d", m_segment->getAudioEndTime().msec());
    TQString endText = TQString("%1.%2s")
                      .tqarg(m_segment->getAudioEndTime().sec)
                      .tqarg(msecs);
    text = new TQCanvasText(m_canvas);
    text->setColor(
        kapp->palette().color(TQPalette::Active, TQColorGroup::Shadow));
    text->setText(endText);
    text->setX(startX + m_previewWidth - 20);
    text->setY(m_canvasHeight / 2 - m_previewHeight / 2 - 35);
    text->setZ(3);
    text->setVisible(true);

    rect = new TQCanvasRectangle(m_canvas);
    rect->setX(startX + m_previewWidth - 1);
    rect->setY(m_canvasHeight / 2 - m_previewHeight / 2 - 14);
    rect->setSize(1, m_previewHeight + 28);
    rect->setPen(kapp->palette().color(TQPalette::Active, TQColorGroup::Shadow));
    rect->setZ(3);
    rect->setVisible(true);

    m_canvas->update();
}

void
AudioSplitDialog::drawSplits(int threshold)
{
    // Now get the current split points and paint them
    //
    RealTime startTime = m_segment->getAudioStartTime();
    RealTime endTime = m_segment->getAudioEndTime();

    AudioFileManager &aFM = m_doc->getAudioFileManager();
    std::vector<SplitPointPair> splitPoints =
        aFM.getSplitPoints(m_segment->getAudioFileId(),
                           startTime,
                           endTime,
                           threshold);

    std::vector<SplitPointPair>::iterator it;
    std::vector<TQCanvasRectangle*> tempRects;

    RealTime length = endTime - startTime;
    double ticksPerUsec = double(m_previewWidth) /
                          double((length.sec * 1000000.0) + length.usec());

    int startX = (m_canvasWidth - m_previewWidth) / 2;
    int halfHeight = m_canvasHeight / 2;
    int x1, x2;
    int overlapHeight = 10;

    for (it = splitPoints.begin(); it != splitPoints.end(); it++) {
        RealTime splitStart = it->first - startTime;
        RealTime splitEnd = it->second - startTime;

        x1 = int(ticksPerUsec * double(double(splitStart.sec) *
                                       1000000.0 + (double)splitStart.usec()));

        x2 = int(ticksPerUsec * double(double(splitEnd.sec) *
                                       1000000.0 + double(splitEnd.usec())));

        TQCanvasRectangle *rect = new TQCanvasRectangle(m_canvas);
        rect->setX(startX + x1);
        rect->setY(halfHeight - m_previewHeight / 2 - overlapHeight / 2);
        rect->setZ(2);
        rect->setSize(x2 - x1, m_previewHeight + overlapHeight);
        rect->setPen(kapp->
                     palette().color(TQPalette::Active, TQColorGroup::Mid));
        rect->setBrush(kapp->
                       palette().color(TQPalette::Active, TQColorGroup::Mid));
        rect->setVisible(true);
        tempRects.push_back(rect);
    }

    std::vector<TQCanvasRectangle*>::iterator pIt;

    // We've written the new Rects, now delete the old ones
    //
    if (m_previewBoxes.size()) {
        // clear any previous preview boxes
        //
        for (pIt = m_previewBoxes.begin(); pIt != m_previewBoxes.end(); pIt++) {
            //(*pIt)->setVisible(false);
            delete (*pIt);
        }
        m_previewBoxes.erase(m_previewBoxes.begin(), m_previewBoxes.end());
        m_canvas->update();
    }
    m_canvas->update();

    // Now store the new ones
    //
    for (pIt = tempRects.begin(); pIt != tempRects.end(); pIt++)
        m_previewBoxes.push_back(*pIt);
}

void
AudioSplitDialog::slotThresholdChanged(int threshold)
{
    drawSplits(threshold);
}

}
#include "AudioSplitDialog.moc"