/*
 * Copyright (C) 2019-2020 Rerrah
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#pragma once

#include <string>
#include <vector>
#include <memory>
#include <mutex>
#include <cstdint>
#include "RtMidi.h"

class RtMidiIn;

class MidiInterface
{
public:
	static MidiInterface& getInstance();
	~MidiInterface();

	std::string currentApiName() const;
	std::vector<std::string> getAvailableApis() const;
	bool isAvailableApi(const std::string& api) const;
	bool switchApi(std::string api, std::string* errDetail = nullptr);
	bool supportsVirtualPort() const;
	bool supportsVirtualPort(std::string api) const;
	std::vector<std::string> getRealInputPorts();
	std::vector<std::string> getRealInputPorts(const std::string& api);

	void closeInputPort();
	bool openInputPort(unsigned port, std::string* errDetail = nullptr);
	bool openInputPortByName(const std::string &portName, std::string* errDetail = nullptr);

	using InputHandler = void(double, const uint8_t*, size_t, void*);
	void installInputHandler(InputHandler *handler, void *userData);
	void uninstallInputHandler(InputHandler *handler, void *userData);

private:
	static std::unique_ptr<MidiInterface> instance_;

	std::unique_ptr<RtMidiIn> inputClient_;
	bool hasOpenInputPort_;
	std::mutex inputHandlersMutex_;
	std::vector<std::pair<InputHandler*, void*>> inputHandlers_;

	MidiInterface();
	static void onMidiInput(double timestamp, std::vector<unsigned char> *message, void *userData);
};
