/* -*- 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.
    Copyright 2000-2022 the Rosegarden development team.
 
    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 "PasteToTriggerSegmentCommand.h"

#include "base/Event.h"
#include "misc/Strings.h"
#include "misc/Debug.h"
#include "base/Clipboard.h"
#include "base/Composition.h"
#include "base/NotationTypes.h"
#include "base/Segment.h"
#include "base/TriggerSegment.h"
#include <QString>


namespace Rosegarden
{

/** PasteToTriggerSegmentCommand itself **/

/**
   PasteToTriggerSegmentCommand delegates essentially all of its work
   to PasteToTriggerSegmentWorker so that its code can be shared with
   CutToTriggerSegmentCommand, which can't be neatly derived from
   PasteToTriggerSegmentCommand.
 */
    
PasteToTriggerSegmentCommand::
PasteToTriggerSegmentCommand(Composition *composition,
                             Clipboard *clipboard,
                             QString label,
                             int basePitch,
                             int baseVelocity) :
    NamedCommand(tr("Paste as New Triggered Segment")),
    m_worker(composition, new Clipboard(*clipboard),
             label, basePitch, baseVelocity)
{
    // nothing else
}

PasteToTriggerSegmentCommand::
~PasteToTriggerSegmentCommand()
{}
    
void
PasteToTriggerSegmentCommand::execute()
{ m_worker.execute(); }

void
PasteToTriggerSegmentCommand::unexecute()
{ m_worker.unexecute(); }

/** PasteToTriggerSegmentWorker **/

    
PasteToTriggerSegmentWorker::PasteToTriggerSegmentWorker(Composition *composition,
        Clipboard *clipboard,
        QString label,
        int basePitch,
        int baseVelocity) :
        m_composition(composition),
        m_clipboard(clipboard ? clipboard : new Clipboard),
        m_label(label),
        m_basePitch(basePitch),
        m_baseVelocity(baseVelocity),
        m_segment(nullptr),
        m_detached(false)
{
    // nothing else
}

PasteToTriggerSegmentWorker::
PasteToTriggerSegmentWorker(Composition *composition,
                            const EventSelection * selection,
                            QString label,
                            int basePitch,
                            int baseVelocity) :
        m_composition(composition),
        m_clipboard(new Clipboard),
        m_label(label),
        m_basePitch(basePitch),
        m_baseVelocity(baseVelocity),
        m_segment(nullptr),
        m_detached(false)
{
    m_clipboard->newSegment(selection);
}

PasteToTriggerSegmentWorker::~PasteToTriggerSegmentWorker()
{
    if (m_detached)
        delete m_segment;
    delete m_clipboard;
}

void
PasteToTriggerSegmentWorker::execute()
{
    RG_DEBUG << "PasteToTriggerSegmentWorker::execute()";

    if (m_segment) {
        // Not the first time executing.
        
        RG_DEBUG << " - m_segment == TRUE";

        m_composition->addTriggerSegment(m_segment, m_id, m_basePitch, m_baseVelocity);

    } else {
        // The first time executing, so get values for m_segment,
        // m_id.

        RG_DEBUG << " - m_segment == FALSE";

        if (m_clipboard->isEmpty()) {
            RG_DEBUG << " - Here's your problem.  The clipboard is empty.";
            return ;
        }

        m_segment = new Segment();

        RG_DEBUG << " - making a new m_segment";

        timeT earliestStartTime = 0;
        timeT latestEndTime = 0;

        for (Clipboard::iterator i = m_clipboard->begin();
                i != m_clipboard->end(); ++i) {

            if (i == m_clipboard->begin() ||
                    (*i)->getStartTime() < earliestStartTime) {
                earliestStartTime = (*i)->getStartTime();
            }

            if ((*i)->getEndMarkerTime() > latestEndTime)
                latestEndTime = (*i)->getEndMarkerTime();
        }

        for (Clipboard::iterator i = m_clipboard->begin();
                i != m_clipboard->end(); ++i) {

            for (Segment::iterator si = (*i)->begin();
                    (*i)->isBeforeEndMarker(si); ++si) {
                if (!(*si)->isa(Note::EventRestType)) {
                    m_segment->insert
                    (new Event(**si,
                               (*si)->getAbsoluteTime() - earliestStartTime));
                }
            }
        }

        if (m_label == "" && m_clipboard->isSingleSegment()) {
            m_segment->setLabel(m_clipboard->getSingleSegment()->getLabel());
        }
        else {
            m_segment->setLabel(qstrtostr(m_label));
        }

        TriggerSegmentRec *rec =
            m_composition->addTriggerSegment(m_segment, m_basePitch, m_baseVelocity);
        if (rec)
            m_id = rec->getId();
    }

    m_composition->getTriggerSegmentRec(m_id)->updateReferences();

    m_detached = false;
}

void
PasteToTriggerSegmentWorker::unexecute()
{
    if (m_segment)
        m_composition->detachTriggerSegment(m_id);
    m_detached = true;
}

}
