/****************************************************************************
 *
 *   Copyright (c) 2021 PX4 Development Team. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name PX4 nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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#pragma once

#include <px4_platform_common/defines.h>
#include <px4_platform_common/module.h>
#include <px4_platform_common/module_params.h>
#include <px4_platform_common/posix.h>
#include <px4_platform_common/px4_work_queue/ScheduledWorkItem.hpp>
#include <drivers/drv_hrt.h>
#include <lib/mathlib/math/WelfordMean.hpp>
#include <lib/perf/perf_counter.h>
#include <lib/sensor_calibration/Gyroscope.hpp>
#include <uORB/Subscription.hpp>
#include <uORB/SubscriptionInterval.hpp>
#include <uORB/SubscriptionMultiArray.hpp>
#include <uORB/topics/parameter_update.h>
#include <uORB/topics/sensor_accel.h>
#include <uORB/topics/sensor_gyro.h>
#include <uORB/topics/vehicle_status.h>
#include <uORB/topics/vehicle_status_flags.h>

using namespace time_literals;

class GyroCalibration : public ModuleBase<GyroCalibration>, public ModuleParams, public px4::ScheduledWorkItem
{
public:
	GyroCalibration();
	~GyroCalibration() override;

	/** @see ModuleBase */
	static int task_spawn(int argc, char *argv[]);

	/** @see ModuleBase */
	static int custom_command(int argc, char *argv[]);

	/** @see ModuleBase */
	static int print_usage(const char *reason = nullptr);

	bool init();

	int print_status() override;

private:
	static constexpr hrt_abstime INTERVAL_US = 20000_us;
	static constexpr int MAX_SENSORS = 4;

	void Run() override;

	void Reset()
	{
		for (auto &m : _gyro_mean) {
			m.reset();
		}
	}

	uORB::SubscriptionInterval _parameter_update_sub{ORB_ID(parameter_update), 1_s};
	uORB::Subscription _vehicle_status_sub{ORB_ID::vehicle_status};
	uORB::Subscription _vehicle_status_flags_sub{ORB_ID::vehicle_status_flags};

	uORB::SubscriptionMultiArray<sensor_accel_s, MAX_SENSORS> _sensor_accel_subs{ORB_ID::sensor_accel};
	uORB::SubscriptionMultiArray<sensor_gyro_s, MAX_SENSORS>  _sensor_gyro_subs{ORB_ID::sensor_gyro};

	calibration::Gyroscope _gyro_calibration[MAX_SENSORS] {};
	math::WelfordMean<matrix::Vector3f> _gyro_mean[MAX_SENSORS] {};
	float _temperature[MAX_SENSORS] {};

	matrix::Vector3f _acceleration[MAX_SENSORS] {};

	hrt_abstime _last_calibration_update{0};

	bool _armed{false};
	bool _system_calibrating{false};

	perf_counter_t _loop_interval_perf{perf_alloc(PC_INTERVAL, MODULE_NAME": interval")};
	perf_counter_t _calibration_updated_perf{perf_alloc(PC_COUNT, MODULE_NAME": calibration updated")};
};