/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive Team
  Modifications Copyright (C) 2025 mikesolar

  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 3 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, see <http://www.gnu.org/licenses/>.

***/

#include "slip.h"

#include <QToolTip>

#include "config/config.h"
#include "timeline/timelineundogeneral.h"
#include "widget/timelinewidget/timelinewidget.h"

namespace olive
{

SlipTool::SlipTool(TimelineWidget *parent)
	: PointerTool(parent)
{
	SetTrimmingAllowed(false);
	SetTrackMovementAllowed(false);
}

void SlipTool::ProcessDrag(const TimelineCoordinate &mouse_pos)
{
	// Determine frame movement
	rational time_movement = drag_start_.GetFrame() - mouse_pos.GetFrame();

	// Validate slip (enforce all ghosts moving in legal ways)
	foreach (TimelineViewGhostItem *ghost, parent()->GetGhostItems()) {
		if (ghost->GetMediaIn() + time_movement < 0) {
			time_movement = -ghost->GetMediaIn();
		}
	}

	// Perform slip
	foreach (TimelineViewGhostItem *ghost, parent()->GetGhostItems()) {
		ghost->SetMediaInAdjustment(time_movement);
	}

	// Generate tooltip and force it to to update (otherwise the tooltip won't move as written in the
	// documentation, and could get in the way of the cursor)
	rational tooltip_timebase =
		parent()->GetTimebaseForTrackType(drag_start_.GetTrack().type());
	QToolTip::hideText();
	QToolTip::showText(QCursor::pos(),
					   QString::fromStdString(Timecode::time_to_timecode(
						   time_movement, tooltip_timebase,
						   Core::instance()->GetTimecodeDisplay(), true)),
					   parent());
}

void SlipTool::FinishDrag(TimelineViewMouseEvent *event)
{
	Q_UNUSED(event)

	MultiUndoCommand *command = new MultiUndoCommand();

	// Find earliest point to ripple around
	foreach (TimelineViewGhostItem *ghost, parent()->GetGhostItems()) {
		Block *b = QtUtils::ValueToPtr<Block>(
			ghost->GetData(TimelineViewGhostItem::kAttachedBlock));

		ClipBlock *cb = dynamic_cast<ClipBlock *>(b);
		if (cb) {
			command->add_child(
				new BlockSetMediaInCommand(cb, ghost->GetAdjustedMediaIn()));
		}
	}

	Core::instance()->undo_stack()->push(
		command, qApp->translate("SlipTool", "Slipped %1 Clip(s)")
					 .arg(parent()->GetGhostItems().size()));
}

}
