/*
  This file is part of Ingen.
  Copyright 2007-2016 David Robillard <http://drobilla.net/>

  Ingen is free software: you can redistribute it and/or modify it under the
  terms of the GNU Affero General Public License as published by the Free
  Software Foundation, either version 3 of the License, or any later version.

  Ingen 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 Affero General Public License for details.

  You should have received a copy of the GNU Affero General Public License
  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef INGEN_EVENTS_DELETE_HPP
#define INGEN_EVENTS_DELETE_HPP

#include "BlockImpl.hpp"
#include "ControlBindings.hpp"
#include "Event.hpp"
#include "GraphImpl.hpp"
#include "types.hpp"

#include "ingen/Message.hpp"
#include "ingen/Store.hpp"
#include "raul/Maid.hpp"
#include "raul/Path.hpp"

#include <cstdint>
#include <map>
#include <memory>
#include <utility>
#include <vector>

namespace ingen {

class Interface;

namespace server {

class CompiledGraph;
class DuplexPort;
class Engine;
class EnginePort;
class PreProcessContext;
class RunContext;

namespace events {

class DisconnectAll;

/** Delete a graph object.
 * \ingroup engine
 */
class Delete : public Event
{
public:
	Delete(Engine&                           engine,
	       const std::shared_ptr<Interface>& client,
	       FrameTime                         timestamp,
	       const ingen::Del&                 msg);

	~Delete() override;

	bool pre_process(PreProcessContext& ctx) override;
	void execute(RunContext& ctx) override;
	void post_process() override;
	void undo(Interface& target) override;

private:
	using IndexChange  = std::pair<uint32_t, uint32_t>;
	using IndexChanges = std::map<Raul::Path, IndexChange>;

	const ingen::Del                    _msg;
	Raul::Path                          _path;
	std::shared_ptr<BlockImpl>          _block; ///< Non-null iff a block
	std::shared_ptr<DuplexPort>         _port; ///< Non-null iff a port
	EnginePort*                         _engine_port;
	Raul::managed_ptr<GraphImpl::Ports> _ports_array; ///< New (external) ports for Graph
	Raul::managed_ptr<CompiledGraph>    _compiled_graph; ///< Graph's new process order
	std::unique_ptr<DisconnectAll>      _disconnect_event;
	Store::Objects                      _removed_objects;
	IndexChanges                        _port_index_changes;

	std::vector<ControlBindings::Binding*> _removed_bindings;
};

} // namespace events
} // namespace server
} // namespace ingen

#endif // INGEN_EVENTS_DELETE_HPP