/**************************************************************************/
/*!
    @file     BLEClientUart.cpp
    @author   hathach (tinyusb.org)

    @section LICENSE

    Software License Agreement (BSD License)

    Copyright (c) 2018, Adafruit Industries (adafruit.com)
    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 holders 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 ''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 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 "bluefruit.h"

void bleuart_central_notify_cb(BLEClientCharacteristic* chr, uint8_t* data, uint16_t len);

BLEClientUart::BLEClientUart(uint16_t fifo_depth)
  : BLEClientService(BLEUART_UUID_SERVICE), _txd(BLEUART_UUID_CHR_TXD), _rxd(BLEUART_UUID_CHR_RXD),
    _rx_fifo(1, fifo_depth)
{
  _rx_cb = NULL;
}

bool BLEClientUart::begin(void)
{
  _rx_fifo.begin();

  // Invoke base class begin()
  BLEClientService::begin();

  _rxd.begin(this);
  _txd.begin(this);

  // set up notify callback
  _txd.setNotifyCallback(bleuart_central_notify_cb);

  return true;
}

bool BLEClientUart::enableTXD(void)
{
  return _txd.enableNotify();
}

bool BLEClientUart::disableTXD(void)
{
  return _txd.disableNotify();
}

void BLEClientUart::setRxCallback( rx_callback_t fp)
{
  _rx_cb = fp;
}

bool BLEClientUart::discover(uint16_t conn_handle)
{
  // Call Base class discover
  VERIFY( BLEClientService::discover(conn_handle) );
  _conn_hdl = BLE_CONN_HANDLE_INVALID; // make as invalid until we found all chars

  // Discover TXD, RXD characteristics
  VERIFY( 2 == Bluefruit.Discovery.discoverCharacteristic(conn_handle, _rxd, _txd) );

  _conn_hdl = conn_handle;
  return true;
}

void BLEClientUart::disconnect(void)
{
  BLEClientService::disconnect();

  flush();
}

void bleuart_central_notify_cb(BLEClientCharacteristic* chr, uint8_t* data, uint16_t len)
{
  BLEClientUart& uart_svc = (BLEClientUart&) chr->parentService();
  uart_svc._rx_fifo.write(data, len);

  // invoke callback
  if ( uart_svc._rx_cb ) uart_svc._rx_cb(uart_svc);
}

/*------------------------------------------------------------------*/
/* STREAM API
 *------------------------------------------------------------------*/
int BLEClientUart::read (void)
{
  uint8_t ch;
  return read(&ch, 1) ? (int) ch : EOF;
}

int BLEClientUart::read (uint8_t * buf, size_t size)
{
  return _rx_fifo.read(buf, size);
}

size_t BLEClientUart::write (uint8_t b)
{
  return write(&b, 1);
}

size_t BLEClientUart::write (const uint8_t *content, size_t len)
{
  // write without response
  return _rxd.write(content, len);
}

int BLEClientUart::available (void)
{
  return _rx_fifo.count();
}

int BLEClientUart::peek (void)
{
  uint8_t ch;
  return _rx_fifo.peek(&ch) ? (int) ch : EOF;
}

void BLEClientUart::flush (void)
{
  _rx_fifo.clear();
}