#include "types.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/**
 * Safely print first argument provided to the program. Determine its meaning.
 *
 * @param argc total number of arguments provided to the program
 *
 * @param argv array/vector of arguments
 */
void print_first_argument(int argc, char *argv[]) {
  if (argc < 1) {
    return;
  }
  printf("%s\n", argv[0]);
  return;
}

/**
 * Safely print first 4 arguments provided to the program while converting them
 * to their corresponding data type.
 *
 * ./main <int> <double> <string>
 *
 * To convert <string> to <int>, use function atoi()
 * (https://cplusplus.com/reference/cstdlib/atoi/)
 *
 * To convert <string> to <double>, use function atof()
 * (https://cplusplus.com/reference/cstdlib/atof/)
 *
 * Use the following commmand to execute your program with set of arguments:
 *
 *      ./main 42 13.37 hello_program
 *
 * @param argc total number of arguments provided to the program
 *
 * @param argv array/vector of arguments
 */
void print_parse_arguments(int argc, char *argv[]) {
  int a;
  double b;
  int s = (argc<4)?argc:4;

  for (int i = 0; i < s; ++i) {
    switch (i) {
    case 1:
      a = atoi(argv[i]);
      printf("%d\n",a);
      break;
    case 2:
      b = atof(argv[i]);
      printf("%.3f\n",b);
      break;
    default:
    printf("%s\n",argv[i]);
      break;
    }
  }
  return;
}

/**
 * Safely print ALL arguments provided to the program without any conversion.
 *
 * ./main <int> <double> <string>
 *
 * @param argc total number of arguments provided to the program
 *
 * @param argv array/vector of arguments
 */
void print_all_arguments(int argc, char *argv[]) {
  for (int i = 0; i < argc; ++i) {
    printf("%s\n", argv[i]);
  }
  return;
}

/**
 * Safely print the largest argument
 *
 * ./main <int> <double> <string>
 *
 * @param argc total number of arguments provided to the program
 *
 * @param argv array/vector of arguments
 */
void print_largest_argument(int argc, char *argv[]) {
  char *c = "";
  for (int i = 0; i < argc; ++i) {
    if(strlen(argv[i]) > strlen(c)){
      c = argv[i];
    }
  }
  printf("Largest argument: %s",c);
  return;
}

#ifndef TEST_BUILD

int main(int argc, char *argv[]) {
  printf("\n-- print_first_argument --\n");
  print_first_argument(argc, argv);
  printf("\n-- print_parse_arguments --\n");
  print_parse_arguments(argc, argv);
  printf("\n-- print_all_arguments --\n");
  print_all_arguments(argc, argv);
  printf("\n-- print_largest_argument --\n");
  print_largest_argument(argc, argv);
  return 0;
}

#endif