#ifndef VFS_VFS_H_
#define VFS_VFS_H_

#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include "spinlock/spinlock.h"
#include "fs/kvfs/kvfs.h"
#include "fs/portlfs/portlfs.h"
#include "storedev/storedev.h"

#define VFS_MOUNTPOINT_LABEL_MAX 128
#define VFS_MOUNTPOINTS_MAX 30

enum {
  VFS_KVFS,
  VFS_LITTLEFS,
};

static const char *vfs_strings[] = {
  "KVFS",
  "Little FS",
};

enum {
  VFS_CREATE_DIR,
  VFS_CREATE_FILE,
};

typedef struct VfsMountPoint {
  bool taken;
  uint8_t label[VFS_MOUNTPOINT_LABEL_MAX];
  int32_t fstype;
  StoreDev *backingsd;

  int32_t (*read)(struct VfsMountPoint *vmp, const char *path, uint8_t *const buffer, size_t n, size_t off);
  int32_t (*write)(struct VfsMountPoint *vmp, const char *path, const uint8_t *const buffer, size_t n, size_t off);
  int32_t (*remove)(struct VfsMountPoint *vmp, const char *path);
  int32_t (*create)(struct VfsMountPoint *vmp, const char *path, int32_t type);
  int32_t (*cleanup)(struct VfsMountPoint *vmp);
  bool (*check)(void);

  union {
    Kvfs kvfs;
    LittleFs littlefs;
  } fs;
  SpinLock spinlock;
} VfsMountPoint;

typedef struct {
  SpinLock spinlock;
  VfsMountPoint mountpoints[VFS_MOUNTPOINTS_MAX];
} VfsTable;

extern VfsTable VFS_TABLE;

void vfs_init(void);
int32_t vfs_read(char *mountpoint, const char *path, uint8_t *const buffer, size_t n, size_t off);
int32_t vfs_write(char *mountpoint, const char *path, const uint8_t *const buffer, size_t n, size_t off);
int32_t vfs_remove(char *mountpoint, const char *path);
int32_t vfs_create(char *mountpoint, const char *path, int32_t type);
int32_t vfs_unmount(char *mountpoint);

#endif // VFS_VFS_H_