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

void walk_dir(const char *path, int follow_symlinks, int ignore_hidden) {
    DIR *dir = opendir(path);
    if (!dir) {
        perror(path);
        return;
    }

    struct dirent *entry;
    while ((entry = readdir(dir)) != NULL) {
        if (strncmp(entry->d_name, ".", 1) == 0)
            continue;

        if (strncmp(entry->d_name, "..", 2) == 0)
            continue;

        // Skip hidden files if requested
        if (ignore_hidden && entry->d_name[0] == '.')
            continue;

        char fullpath[4096];
        snprintf(fullpath, sizeof(fullpath), "%s/%s", path, entry->d_name);

        struct stat st;
        int         ret;
        if (follow_symlinks)
            ret = stat(fullpath, &st);
        else
            ret = lstat(fullpath, &st);

        if (ret != 0) {
            /* Permission denied ends up here */
            perror(fullpath);
            continue;
        }

        /* There are a bunch of macros in <sys/stat.h> like S_ISDIR for checking */
        printf("FILE: %s\n", fullpath);
        if (S_ISDIR(st.st_mode)) {
            walk_dir(fullpath, follow_symlinks, ignore_hidden);
        } 
    }

    closedir(dir);
}

int main(int argc, char *argv[]) {
    if (argc < 2) {
        fprintf(stderr, "Usage: %s <dir> [--follow-symlinks] [--ignore-hidden]\n", argv[0]);
        return 1;
    }

    int follow_symlinks = 0;
    int ignore_hidden = 0;

    for (int i = 2; i < argc; i++) {
        if (strcmp(argv[i], "--follow-symlinks") == 0)
            follow_symlinks = 1;
        if (strcmp(argv[i], "--ignore-hidden") == 0)
            ignore_hidden = 1;
    }

    walk_dir(argv[1], follow_symlinks, ignore_hidden);
    return 0;
}