/***

  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/>.

***/

#ifndef OAK_TIMELINEUNDOTRACK_H
#define OAK_TIMELINEUNDOTRACK_H

#include "node/output/track/track.h"

namespace olive
{

class TrackRippleRemoveBlockCommand : public UndoCommand {
public:
	TrackRippleRemoveBlockCommand(Track *track, Block *block)
		: track_(track)
		, block_(block)
	{
	}

	virtual Project *get_relevant_project() const override
	{
		return track_->project();
	}

protected:
	virtual void redo() override
	{
		before_ = block_->previous();
		track_->ripple_remove_block(block_);
	}

	virtual void undo() override
	{
		track_->insert_block_after(block_, before_);
	}

private:
	Track *track_;

	Block *block_;

	Block *before_;
};

class TrackPrependBlockCommand : public UndoCommand {
public:
	TrackPrependBlockCommand(Track *track, Block *block)
		: track_(track)
		, block_(block)
	{
	}

	virtual Project *get_relevant_project() const override
	{
		return track_->project();
	}

protected:
	virtual void redo() override
	{
		track_->prepend_block(block_);
	}

	virtual void undo() override
	{
		track_->ripple_remove_block(block_);
	}

private:
	Track *track_;
	Block *block_;
};

class TrackInsertBlockAfterCommand : public UndoCommand {
public:
	TrackInsertBlockAfterCommand(Track *track, Block *block, Block *before)
		: track_(track)
		, block_(block)
		, before_(before)
	{
	}

	virtual Project *get_relevant_project() const override
	{
		return block_->project();
	}

protected:
	virtual void redo() override
	{
		track_->insert_block_after(block_, before_);
	}

	virtual void undo() override
	{
		track_->ripple_remove_block(block_);
	}

private:
	Track *track_;

	Block *block_;

	Block *before_;
};

/**
 * @brief Replaces Block `old` with Block `replace`
 *
 * Both blocks must have equal lengths.
 */
class TrackReplaceBlockCommand : public UndoCommand {
public:
	TrackReplaceBlockCommand(Track *track, Block *old, Block *replace)
		: track_(track)
		, old_(old)
		, replace_(replace)
	{
	}

	virtual Project *get_relevant_project() const override
	{
		return track_->project();
	}

protected:
	virtual void redo() override
	{
		track_->replace_block(old_, replace_);
	}

	virtual void undo() override
	{
		track_->replace_block(replace_, old_);
	}

private:
	Track *track_;
	Block *old_;
	Block *replace_;
};

}

#endif // OAK_TIMELINEUNDOTRACK_H