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#ifndef DETECT_DUPS_H
#define DETECT_DUPS_H

#define _XOPEN_SOURCE 500

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ftw.h>
#include <sys/stat.h>
#include <openssl/evp.h>
#include <openssl/md5.h>
#include <unistd.h>
#include <errno.h>
#include "uthash.h"

// Structure to store file paths for hard links
typedef struct path_node {
    char *path;
    struct path_node *next;
} PathNode;

// Structure to store soft link information
typedef struct soft_link {
    ino_t inode;
    int count;
    int link_num;
    PathNode *paths;
    struct soft_link *next;
} SoftLink;

// Structure to store hard link information
typedef struct hard_link {
    ino_t inode;
    int count;
    PathNode *paths;
    SoftLink *soft_links;
    struct hard_link *next;
} HardLink;

// Structure to store file information with the same MD5 hash
typedef struct file_info {
    char md5_hash[33];  // MD5 hash is 32 chars + null terminator
    HardLink *hard_links;
    struct file_info *next;
} FileInfo;

// Hash table structure for MD5 hashes
typedef struct hash_entry {
    char md5_hash[33];
    FileInfo *file_info;
    UT_hash_handle hh;
} HashEntry;

// Process files using nftw
static int render_file_info(const char *fpath, const struct stat *sb, int tflag, struct FTW *ftwbuf);

// Calculate MD5 hash of a file
char* calculate_md5(const char *filename);

// Add a file to the appropriate data structures
void add_file(const char *path, const struct stat *sb, char *md5_hash);

// Print the results
void print_results();

// Free memory
void cleanup();

#endif // DETECT_DUPS_H