/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2014 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#pragma once

#include <string>
#include <iostream>

#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>
#include <sys/time.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <mraa/uart.h>

const int  UBLOX6_DEFAULT_UART = 0;

namespace upm {

  /**
   * @brief C++ API for the U-BLOX 6 GPS module
   *
   * UPM support for the U-BLOX 6 GPS Module
   *
   * @ingroup grove uart
   * @snippet ublox6.cxx Interesting
   */
  class Ublox6 {
  public:
    /**
     * U-BLOX 6 GPS module constructor
     *
     * @param uart defualt uart to use (0 or 1)
     */
    Ublox6(int uart);

    /**
     * U-BLOX 6 GPS module Destructor
     */
    ~Ublox6();

    /**
     * Check to see if there is data available for reading
     *
     * @return true if there is data available to be read
     */
    bool dataAvailable();

    /**
     * read any available data into a user-supplied buffer.  Note, the
     * call will block until data is available to be read.  Use
     * dataAvailable() to determine whether there is data available
     * beforehand, to avoid blocking.
     *
     * @param buffer the buffer to hold the data read
     * @param len the length of the buffer
     * @return the number of bytes read
     */
    int readData(char *buffer, size_t len);

    /**
     * write the data in buffer to the device
     *
     * @param buffer the buffer to hold the data read
     * @param len the length of the buffer
     * @return the number of bytes written
     */
    int writeData(char *buffer, size_t len);

    /**
     * setup the proper tty i/o modes and the baudrate.  The default
     * baud rate is 9600 (B9600).
     *
     * @param baud the desired baud rate.  
     * @return true if successful
     */
    bool setupTty(speed_t baud=B9600);

  protected:
    int ttyFd() { return m_ttyFd; };
    int setTtyFd(int fd) { m_ttyFd = fd; };

  private:
    mraa_uart_context m_uart;
    int m_ttyFd;
  };
}