/*! \file pihidevice.h
 * \ingroup System
 * \~\brief
 * \~english HID device
 * \~russian HID устройство
 */
/*
    PIP - Platform Independent Primitives
    HID device
    Ivan Pelipenko peri4ko@yandex.ru

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.

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

#ifndef PIHIDEVICE_H
#define PIHIDEVICE_H

#include "pithread.h"


struct PIP_EXPORT PIHIDeviceInfo {
	friend class PIHIDevice;
	struct PIP_EXPORT ValueInfoBase {
		bool isValid() const { return index >= 0; }
		int index      = -1;
		int data_index = -1;
	};
	struct PIP_EXPORT AxisInfo: public ValueInfoBase {
		int bits         = 0;
		int min          = 0;
		int max          = 1;
		bool is_relative = false;
	};
	struct PIP_EXPORT ButtonInfo: public ValueInfoBase {
		int code = 0;
	};
	PIString path;
	PIString manufacturer;
	PIString product;
	PIString serial;
	PIString version;
	PIString VID;
	PIString PID;
	PIVector<AxisInfo> axes;
	PIVector<ButtonInfo> buttons;
	bool isNull() const { return path.isEmpty(); }
	bool isNotNull() const { return !isNull(); }
	bool match(const PIString & str) const;
	int axesCount() const { return axes.size_s(); }
	int axesAbsoluteCount() const;
	int axesRelativeCount() const;
	int buttonsCount() const { return buttons.size_s(); }

private:
	void prepare();
	PIMap<int, AxisInfo> axis_by_dataindex;
	PIMap<int, ButtonInfo> button_by_dataindex;
	int input_report_size   = 0;
	int output_report_size  = 0;
	int feature_report_size = 0;
};

PIP_EXPORT PICout operator<<(PICout s, const PIHIDeviceInfo & v);


class PIP_EXPORT PIHIDevice: public PIThread {
	PIOBJECT_SUBCLASS(PIHIDevice, PIThread)

public:
	~PIHIDevice();

	struct PIP_EXPORT Event {
		enum Type {
			tNone,
			tButton,
			tAxisMove,
		};
		Type type = tNone;
		PIHIDeviceInfo::AxisInfo axis;
		PIHIDeviceInfo::ButtonInfo button;
		float value = 0.;
	};

	bool isOpened() const;
	bool open(const PIHIDeviceInfo & device);
	bool open();
	void close();
	void start();
	void stop();

	void setDeadZone(float v) { dead_zone = v; }
	float deadZone() const { return dead_zone; }

	EVENT1(event, PIHIDevice::Event, e);

	static PIVector<PIHIDeviceInfo> allDevices(bool try_open = true);
	static PIHIDeviceInfo findDevice(const PIString & name);

private:
	void run() override;
	double procDeadZone(double in);

	PRIVATE_DECLARATION(PIP_EXPORT)
	PIHIDeviceInfo di;
	PIMap<int, float> prev_axes, cur_axes;
	PIMap<int, int> prev_buttons, cur_buttons;
	float dead_zone = 0.f;
};


#endif