#include <stdio.h>
#include "stdlib.h"
#include <dirent.h>
#include <sys/stat.h>
#include "string.h"


static int
filter_movies (const struct dirent *unused)
{
  if(strstr(unused->d_name, "movies_") == unused->d_name) {
    char* temp = strchr(unused->d_name, '.');
    if(temp != NULL)
      if( !strcmp(temp, ".csv"))
        return 1;
  }

  return 0;
}

void dir_free(struct dirent** ent, int n) {

  int i = 0;
  while(n--) {
     free(ent[n]);
     i++;
   }

   free(ent);


}

char* largest_val() {

  struct dirent** eps;
  int num = scandir ("./", &eps, filter_movies, alphasort);

  if(num < 1)
    exit(1);

  struct dirent* max = eps[0];
  struct stat *cur_stat = malloc(sizeof(struct stat));
  stat(eps[0]->d_name, cur_stat);
  int n = 1;

  struct stat *st = malloc(sizeof(struct stat));
  while(n < num) {
    stat (eps[n]->d_name, st);

    if(st->st_size > cur_stat->st_size) {
      struct stat* temp = cur_stat;
      cur_stat = st;
      st = temp;
      max = eps[n];
    }

    n++;
    }

  char* ret = malloc((strlen(max->d_name) + 1) * sizeof(char));
  strcpy(ret, max->d_name);

  free(cur_stat);
  free(st);
  dir_free(eps, n);

  return ret;
}



char* smallest_val() {

  struct dirent** eps;
  int num = scandir ("./", &eps, filter_movies, alphasort);

  if(num < 1)
    exit(1);

  struct dirent* max = eps[0];
  struct stat *cur_stat = malloc(sizeof(struct stat));
  stat(eps[0]->d_name, cur_stat);
  int n = 1;

  struct stat *st = malloc(sizeof(struct stat));
  while(n < num) {
    stat (eps[n]->d_name, st);

    if(st->st_size < cur_stat->st_size) {
      struct stat* temp = cur_stat;
      cur_stat = st;
      st = temp;
      max = eps[n];
    }

    n++;
    }

  char* ret = malloc((strlen(max->d_name) + 1) * sizeof(char));
  strcpy(ret, max->d_name);

  free(cur_stat);
  free(st);
  dir_free(eps, n);

  return ret;
}

int temp() {

  char* large = largest_val();
  printf("Largest Moives: %s\n", large);
  char* small = smallest_val();
  printf("Smallest Moives: %s\n", small);

  free(small);
  free(large);

  return 0;
}