#include <boost/program_options.hpp>
#include <cctype>
#include <iostream>

#define COMMANDLEN 10
#define sizeofarr(a) (sizeof(a) / sizeof(a[0]))

namespace bpo = boost::program_options;

typedef enum {
  CMD_HELP,
  CMD_CONNECT,
  CMD_DISCONNECT,
  CMD_PUT,
  CMD_REMOVE,
  CMD_GET,
  CMD_QUERY,
  CMD_SETUP,
  CMD_LOG,
  CMD_UNKNOWN
} COMMANDTYPES;

typedef struct {
  COMMANDTYPES cmd;
  const char *name;
  const char *desc;
} CMD;

CMD commands[]{{CMD_HELP, "help", "show help"},
               {CMD_CONNECT, "connect", "connect to IP"},
               {CMD_DISCONNECT, "disconnect", "disconnect from IP"},
               {CMD_PUT, "put", "upload file to IP and add to queue"},
               {CMD_REMOVE, "remove",
                "remove file from IP and queue (stops xfer if required)"},
               {CMD_GET, "get", "retrieve file from IP"},
               {CMD_QUERY, "query", "query status of IP"},
               {CMD_SETUP, "setup", "configure server at IP"},
               {CMD_LOG, "log", "show log from IP"}};

COMMANDTYPES getCommand(char *str, unsigned int isshort) {
  COMMANDTYPES ret = CMD_UNKNOWN;
  char temp[11] = {0};
  if (strlen(str) > COMMANDLEN)
    return ret;
  if (isshort)
    temp[0] = tolower(str[0]);
  else
    for (int i = 0; i < 10; i++)
      temp[i] = tolower(str[i]);

  for (int i = 0; i < sizeofarr(commands); i++) {
    if (isshort) {
      if (tolower(str[0]) == commands[i].name[0])
        ret = commands[i].cmd;
    } else {
      if (!strncmp(temp, commands[i].name, COMMANDLEN))
        ret = commands[i].cmd;
    }
  }
  return ret;
}

void show_help(char *exec) {
  std::printf("ccats command line interface\n");
  std::printf("usage: %s COMMAND IP [Options]\n", exec);
  std::printf("available COMMANDs are:\n");
  for (int i = 0; i < sizeofarr(commands); i++) {
    std::printf("%10s - %s\n", commands[i].name, commands[i].desc);
  }
  std::printf("IP should be in the format \"xxx.xxx.xxx.xxx\"\n");
}

int main(int argc, char **argv) {
  bpo::options_description desc{"Options"};
  desc.add_options()("cooloption", "Cooloption to use with command FOON");
  bpo::variables_map vm;

  if (argc < 2) {
    show_help(argv[0]);
    exit(1);
  }
  COMMANDTYPES cmd = getCommand(argv[1], (strlen(argv[1]) == 1));
  switch (cmd) {
  case CMD_UNKNOWN:
    std::printf("unknown command\n");
  case CMD_HELP:
    show_help(argv[0]);
    std::cout << desc;
    exit(1);
  }

  // have enough valid arguments
  switch (cmd) {
  case CMD_CONNECT:
    std::printf("connecting to %s\n", argv[2]);
    break;
  case CMD_DISCONNECT:
    std::printf("disconnecting from %s\n", argv[2]);
    break;
  default:
    std::printf("command %s not implemented\n", argv[1]);
    break;
  }

  try {
    store(parse_command_line(argc - 2, argv + 2, desc), vm);
    notify(vm);

    if (vm.count("help")) {
      std::cout << desc;
    } else {
      std::printf("no additional options\n");
    }
  } catch (const bpo::error &ex) {
    std::fprintf(stderr, "%s\n", ex.what());
  }
}