/**
 * Copyright 2016-2023
 * 
 * Bernd-Christian Renner, and
 * Hamburg University of Technology (TUHH).
 * 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 of the copyright holder 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 COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "aci.h"
#include "aci/types/powerlevel_rsp.h"
#include "aci_powerlevel.h"

#include <hal_adda.h>
#include <channelquality.h>



/**************************************************************************
 * private prototypes
 */



/**************************************************************************
 * private functions
 */

uint8_t
aci_powerlevel_fillReply(uint8_t * payload)
{
  aci_powerlevel_rsp_t  * p = (aci_powerlevel_rsp_t *)payload;

  uint16_t  i;
  fp32_t    Ueff;
  fp32_t    Umean;
  fp16_t    sample;

  // calculate power
  // @see channelquality.h/c for details on the method
  Umean = 0;
  Ueff  = 0;
  for (i = 0; i < RX_SAMPLES_PER_SYMBOL; i++) {
    while (! adda_getSample(&sample)) { ; }
    Ueff += fp16_square(sample);
    Umean += sample;
  }
  p->power = channelquality_calcPowerLevel(Ueff, Umean, RX_SAMPLES_PER_SYMBOL, 1);  // the reference is a simple sine (useful?)

  return sizeof(aci_powerlevel_rsp_t);
}



/**************************************************************************
 * public functions
 */

bool
aci_powerlevel_processCmd(const mm_packet_t * pkt)
{
  // read-only command
  return true;
}