#pragma once
#include <termios.h>
#include <unistd.h>

#include <fstream>
#include <functional>
#include <iostream>
#include <list>
#include <map>
#include <memory>
#include <set>
#include <sstream>
#include <string>
#include <vector>

namespace iflytop {
using namespace std;
// ref:https://www.cnblogs.com/electron/p/3451114.html
// ref:https://baike.baidu.com/item/tcflush/6869357?fr=aladdin
class Uart {
 private:
  /* data */
  int            m_fd = 0;
  string         m_name;
  string         m_rate;
  struct termios m_tty;
  string         m_error;

 public:
  Uart();
  ~Uart();

  /**
   * @brief 打开串口
   *
   * @param path
   * @param rate
   *      "0"       "50"      "75"      "110"
   *      "134"     "150"     "200"     "300"
   *      "600"     "1200"    "1800"    "2400"
   *      "4800"    "9600"    "19200"   "38400"
   *      "57600"   "115200"  "230400"  "460800"
   *      "500000"  "576000"  "921600"  "1000000"
   *      "1152000" "1500000" "2000000" "2500000"
   *      "3000000" "3500000" "4000000"
   *
   * @return int
   */
  int open(string path, string rate);
  int send(char *data, int size);
  int receive(char *data, int size_max);
  int receive(char *data, int size, int overtimems);
  int close();

  string get_error() { return m_error; }

  bool flush_rx();
  bool flush_tx();
  bool set_rx_overtime(int n100ms);
};

}  // namespace iflytop