/*
 * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
 *
 * This file is part of PortaPack.
 *
 * 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 2, 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __RSSI_STATS_COLLECTOR_H__
#define __RSSI_STATS_COLLECTOR_H__

#include <cstdint>
#include <cstddef>

#include "rssi.hpp"
#include "message.hpp"

class RSSIStatisticsCollector {
   public:
    template <typename Callback>
    void process(const rf::rssi::buffer_t& buffer, Callback callback) {
        auto p = buffer.p;
        if (p == nullptr) {
            return;
        }

        if (statistics.count == 0) {
            const auto value_0 = *p;
            statistics.min = value_0;
            statistics.max = value_0;
        }

        const auto end = &p[buffer.count];
        while (p < end) {
            const uint32_t value = *(p++);

            if (statistics.min > value) {
                statistics.min = value;
            }
            if (statistics.max < value) {
                statistics.max = value;
            }

            statistics.accumulator += value;
        }
        statistics.count += buffer.count;

        const size_t samples_per_update = buffer.sampling_rate * update_interval;

        if (statistics.count >= samples_per_update) {
            callback(statistics);
            statistics.accumulator = 0;
            statistics.count = 0;
        }
    }

   private:
    static constexpr float update_interval{0.1f};
    RSSIStatistics statistics{};
};

#endif /*__RSSI_STATS_COLLECTOR_H__*/