#include <stdio.h>

#include "fs/fs.h"

#include "tinydir/tinydir.h"

#include "copy.h"

#define is_dot_file(file) 0 == strcmp(".", file.name) || 0 == strcmp("..", file.name)

#define check_err(x) if (0 != (err = x)) break;

int copy_file(char *from, char *to)

{

    char *content = fs_read(from);

    if (!content) {

        return -1;

    }

    fs_write(to, content);

    free(content);

    return 0;

}

static void check_dir(char *dir)

{

    if (0 != fs_exists(dir)) {

        fs_mkdir(dir, 0700);

    }

}

static int copy(tinydir_file file, char *target_dir)

{

    char target_path[strlen(target_dir) + strlen(file.name) + 2];

    sprintf(target_path, "%s/%s", target_dir, file.name);

    if (file.is_dir) {

        return copy_dir(file.path, target_path);

    }

    return copy_file(file.path, target_path);

}

int copy_dir(char *dir_path, char *target_dir)

{

    int err = 0;

    tinydir_dir dir;

    tinydir_file file;

    tinydir_open(&dir, dir_path);

    check_dir(target_dir);

    while (dir.has_next) {

        check_err(tinydir_readfile(&dir, &file));

        if (is_dot_file(file)) {

            goto next;

        }

        check_err(copy(file, target_dir));

        next:

        check_err(tinydir_next(&dir));

    }

    tinydir_close(&dir);

    return err;

}