/*********************************************************************************/
/* Module Name:  vfs.c                                                           */
/* Project:      AurixOS                                                         */
/*                                                                               */
/* Copyright (c) 2024-2025 Jozef Nagy                                            */
/*                                                                               */
/* This source is subject to the MIT License.                                    */
/* See License.txt in the root of this repository.                               */
/* All other rights reserved.                                                    */
/*                                                                               */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    */
/* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      */
/* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   */
/* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        */
/* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, */
/* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */
/* SOFTWARE.                                                                     */
/*********************************************************************************/

/* VFS originally written by Levente Kurusa, stripped down for AxBoot */
/* https://github.com/levex/osdev */

#include <mm/mman.h>
#include <vfs/drive.h>
#include <vfs/vfs.h>
#include <lib/string.h>
#include <print.h>
#include <stdint.h>
#include <stddef.h>

#define MAX_MOUNTS 32

struct vfs_drive *boot_drive = NULL;

int vfs_init(char *root_mountpoint)
{
	boot_drive = mount_boot_volume(root_mountpoint);
	if (boot_drive == NULL) {
		log("vfs_init(): Failed to allocate memory for VFS!\n");
		// fuck off and boot out early.
		return 0;
	}

	log("vfs_init(): Mounted boot drive to \"\\\"\n");
	return 1;
}

size_t vfs_read(char *filename, char **buf)
{
	if (boot_drive->fs->read == NULL) {
		log("vfs_read(): Filesystem didn't set up a read function!\n");
		return 0;
	}

	return boot_drive->fs->read(filename, buf, boot_drive, boot_drive->fs->fsdata);
}

int vfs_write(char *filename, char *buf, size_t len)
{
	if (boot_drive->fs->write == NULL) {
		log("vfs_read(): Filesystem didn't setup a write function!\n");
		return 0;
	}

	return boot_drive->fs->write(filename, buf, len, boot_drive, boot_drive->fs->fsdata);
}