/* -*- 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 2000-2023 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 "EraseEventCommand.h"

#include "misc/Strings.h"
#include "base/Event.h"
#include "base/NotationTypes.h"
#include "base/Segment.h"
#include "base/SegmentNotationHelper.h"
#include "base/BaseProperties.h"
#include "document/BasicCommand.h"
#include "gui/editors/notation/NotationProperties.h"


namespace Rosegarden
{

EraseEventCommand::EraseEventCommand(Segment &segment,
                                     Event *event,
                                     bool collapseRest) :
        BasicCommand(strtoqstr(makeName(event->getType())),
                     segment,
                     event->getAbsoluteTime(),
                     event->getAbsoluteTime() + event->getDuration(),
                     true),
        m_collapseRest(collapseRest),
        m_event(event),
        m_relayoutEndTime(getEndTime())
{
    // nothing
}

EraseEventCommand::~EraseEventCommand()
{
    // nothing
}

std::string
EraseEventCommand::makeName(std::string e)
{
    std::string n = "Erase ";
    n += (char)toupper(e[0]);
    n += e.substr(1);
    return n;
}

timeT
EraseEventCommand::getRelayoutEndTime()
{
    return m_relayoutEndTime;
}

void
EraseEventCommand::modifySegment()
{
    SegmentNotationHelper helper(getSegment());

    if (m_event->isa(Clef::EventType) ||
            m_event->isa(Key ::EventType)) {

        m_relayoutEndTime = helper.segment().getEndTime();

    } else if (m_event->isa(Indication::EventType)) {
        try {

            int graceToAdjust = 0;
            int minGraceSubOrdering = 0;
            int maxDeltaGraceSubOrdering = 0;
            int indicationSubOrdering = m_event->getSubOrdering();
            int minSubOrdering = 0;

            // Adjust suborderings of any existing grace notes if necessary.

            Segment::iterator i, j;
            getSegment().getTimeSlice(m_event->getAbsoluteTime(), i, j);
            for (Segment::iterator k = i; k != j; ++k) {
                if ((*k)->has(BaseProperties::IS_GRACE_NOTE)) {
                    if ((*k)->getSubOrdering() < indicationSubOrdering) {
                        ++graceToAdjust;
                        if ((*k)->getSubOrdering() < minGraceSubOrdering) {
                            minGraceSubOrdering = (*k)->getSubOrdering();
                            maxDeltaGraceSubOrdering =
                                indicationSubOrdering - minGraceSubOrdering;
                        }
                    }
                } else if (m_event != (*k) &&
                           (*k)->getSubOrdering() < minSubOrdering) {
                    minSubOrdering = (*k)->getSubOrdering();
                }
            }

            if (graceToAdjust > 0 &&
                minGraceSubOrdering < indicationSubOrdering &&
                minSubOrdering > indicationSubOrdering &&
                maxDeltaGraceSubOrdering >= graceToAdjust) {
                int incr = minSubOrdering - indicationSubOrdering;
                std::vector<Event *> toInsert, toErase;
                for (Segment::iterator k = i; k != j; ++k) {
                    if ((*k)->has(BaseProperties::IS_GRACE_NOTE) &&
                        (*k)->getSubOrdering() < indicationSubOrdering) {
                        // Subordering of the grace note is incremented to
                        // avoid (a rare) relevant decrement of that value.
                        toErase.push_back(*k);
                        toInsert.push_back
                            (new Event(**k,
                                       (*k)->getAbsoluteTime(),
                                       (*k)->getDuration(),
                                       (*k)->getSubOrdering() + incr,
                                       (*k)->getNotationAbsoluteTime(),
                                       (*k)->getNotationDuration()));
                    }
                }
                for (std::vector<Event *>::iterator k = toErase.begin();
                     k != toErase.end(); ++k) getSegment().eraseSingle(*k);
                for (std::vector<Event *>::iterator k = toInsert.begin();
                     k != toInsert.end(); ++k) getSegment().insert(*k);
            }

            Indication indication(*m_event);
            if (indication.isOttavaType()) {

                for (Segment::iterator i = getSegment().findTime
                                           (m_event->getAbsoluteTime());
                        i != getSegment().findTime
                        (m_event->getAbsoluteTime() + indication.getIndicationDuration());
                        ++i) {
                    (*i)->unset(NotationProperties::OTTAVA_SHIFT);
                }
            }
        } catch (...) {}
    }

    helper.deleteEvent(m_event, m_collapseRest);
}

}
