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


void listFiles(const char *path);

time_t lowerDate, upperDate;
long long lowerSize, upperSize;

int main(int argc, char** argv)
{
        char *path = argv[1];

        struct tm tm;
        memset( &tm,  0, sizeof( struct tm ) );
        strptime(argv[2], "%D", &tm);

        lowerDate = mktime(&tm);

        memset( &tm,  0, sizeof( struct tm ) );
        strptime(argv[3], "%D", &tm);

        upperDate = mktime(&tm);

        char* strLowerSize = argv[4];
        char* strUpperSize = argv[5];

        char* endptr;
        lowerSize = strtoll(strLowerSize, &endptr, 10);
        upperSize = strtoll(strUpperSize, &endptr, 10);

        listFiles(path);



        return 0;
}

/**
 * Lists all files and sub-directories at given path.
 */
void listFiles(const char *path)
{
        struct dirent *dp;
        DIR *dir = opendir(path);

        // Unable to open directory stream
        if (!dir)
                return;

        while ((dp = readdir(dir)) != NULL)
        {
                char* dir = malloc(strlen(path)+ NAME_MAX + 1);
                strcpy(dir, path);
                strcat(dir,"/");
                strcat(dir, dp->d_name);
                if(dp->d_type == DT_DIR&& strcmp(".", dp->d_name) && strcmp("..", dp->d_name) ) {

                        //  printf("%s\n", dir);
                        listFiles(dir);
                } else if(dp->d_type == DT_REG) {
                        struct stat st;
                        stat(dir, &st);
                        time_t lastModified = st.st_mtim.tv_sec;
                        off_t size = st.st_size;
                        if(lastModified >= lowerDate && lastModified <= upperDate && size >= lowerSize && size <= upperSize) {
                                printf("File: %s -  %s \n", dp->d_name, ctime(&lastModified));
                        }

                        // check whether file matches conditions or not and output if  necessary

                }
        }

        // Close directory stream
        closedir(dir);
}