#ifndef R2_FS_H
#define R2_FS_H

#include <r_types.h>
#include <r_list.h>
#include <r_bind.h> // RCoreBind
#include <r_io.h> // RIOBind
#include <r_util.h>
#include <r_cons.h>

#ifdef __cplusplus
extern "C" {
#endif

R_LIB_VERSION_HEADER (r_fs);

struct r_fs_plugin_t;
struct r_fs_root_t;
struct r_fs_t;

typedef struct r_fs_t {
	RIOBind iob;
	RCoreBind cob;
	RConsBind csb;
	RList /*<RFSRoot>*/ *roots;
	int view;
	void *ptr;
	RLibStore *libstore;
} RFS;

typedef struct r_fs_partition_plugin_t {
	const char *name;
} RFSPartitionPlugin;

typedef struct r_fs_file_t {
	char *name;
	char *path;
	ut64 off;
	ut32 size;
	char type;
	ut8 *data;
	void *ctx;
	ut32 uid; // owner
	ut32 gid; // group
	ut32 perm; // rwx
	ut64 time;
	struct r_fs_plugin_t *p;
	struct r_fs_root_t *root;
	void *ptr; // internal pointer
	// Populated only when the file is a loadable bin inside a container.
	// r_fs_file_free takes ownership and frees all of these.
	RBuffer *buf;      // zero-copy slice of the container, or decompressed bytes
	char *arch;        // "arm", "x86", ...; NULL when unknown
	char *machine;     // cpu subtype / abi string
	char *btype;       // bin type (exec, dyn, ...)
	const char *container; // name of the producing fs plugin; do not free
	int bits;
} RFSFile;

typedef struct r_fs_root_t {
	char *path;
	ut64 delta;
	char *options;
	struct r_fs_plugin_t *p;
	void *ptr;
	// Backing IO fd for container filesystems (fatmacho, etc). -1 when not
	// applicable. Closing this fd while the mount is active breaks slice
	// reads, so o- refuses to close fds held by a mount.
	int fd;
	// TODO: deprecate
	RIOBind iob;
	RCoreBind cob;
} RFSRoot;

typedef struct r_fs_plugin_t {
	RPluginMeta meta;
	RFSFile* (*slurp)(RFSRoot *root, const char *path);
	RFSFile* (*open)(RFSRoot *root, const char *path, bool create);
	bool (*unlink)(RFSRoot *root, const char *path);
	int (*write)(RFSFile *fs, ut64 addr, const ut8 *data, int len);
	int (*read)(RFSFile *fs, ut64 addr, int len);
	void (*close)(RFSFile *fs);
	RList *(*dir)(RFSRoot *root, const char *path, int view);
	bool (*mkdir)(RFSRoot *root, const char *path);
	bool (*init)(void);
	void (*fini)(void);
	bool (*mount)(RFSRoot *root);
	void (*umount)(RFSRoot *root);
	/* callback to run plugin-specific commands (e.g. m:cmd) */
	bool (*cmd)(RFS *fs, const char *cmd);
	/* callback to print filesystem-specific details */
	void (*details)(RFSRoot *root, RStrBuf *sb);
	/* optional: enumerate loadable bins inside a container buffer. Returns
	 * NULL when the plugin is not a bin container or the buffer doesn't
	 * match. Each entry must have ->buf populated (zero-copy slice or
	 * fresh buffer) plus arch/bits/machine/btype when known. */
	RList/*<RFSFile>*/ *(*bins)(RBuffer *buf);
} RFSPlugin;

typedef struct r_fs_partition_t {
	int number;
	ut64 start;
	ut64 length;
	int index;
	int type;
} RFSPartition;

typedef struct r_fs_shell_t {
	RCons *cons;
	char *cwd;
	void (*set_prompt)(RLine *line, const char *prompt);
	const char* (*readline)(RCons *cons);
	bool (*hist_add)(RLine *line, const char *text);
} RFSShell;

typedef struct r_fs_type_t {
	const char * const name;
	int bufoff;
	const char * const buf;
	int buflen;
	int byteoff;
	ut8 byte;
	int bytelen;
} RFSType;

static inline RFSShell *r_fs_shell_new(void) {
	return R_NEW0 (RFSShell);
}

static inline void r_fs_shell_free(RFSShell *s) {
	free (s->cwd);
	free (s);
}

#define R_FS_FILE_TYPE_MOUNTPOINT 'm'
#define R_FS_FILE_TYPE_DIRECTORY 'd'
#define R_FS_FILE_TYPE_REGULAR 'r'
#define R_FS_FILE_TYPE_DELETED 'x'
#define R_FS_FILE_TYPE_SPECIAL 's'
#define R_FS_FILE_TYPE_BLOCK 'b'
#define R_FS_FILE_TYPE_CHAR 'c'
#define R_FS_FILE_TYPE_MOUNT 'm'

// symlinked types
#define R_FS_FILE_TYPE_S_MOUNTPOINT 'M'
#define R_FS_FILE_TYPE_S_DIRECTORY 'D'
#define R_FS_FILE_TYPE_S_REGULAR 'R'
#define R_FS_FILE_TYPE_S_DELETED 'X'
#define R_FS_FILE_TYPE_S_SPECIAL 'S'
#define R_FS_FILE_TYPE_S_BLOCK 'B'
#define R_FS_FILE_TYPE_S_CHAR 'C'
#define R_FS_FILE_TYPE_S_MOUNT 'M'

typedef int (*RFSPartitionIterator)(void *disk, void *ptr, void *user);
typedef struct r_fs_partition_type_t {
	const char *name;
	void *ptr; // grub_msdos_partition_map
	RFSPartitionIterator iterate;
	//RFSPartitionIterator parhook;
} RFSPartitionType;
#define R_FS_PARTITIONS_LENGTH (int)(sizeof (partitions)/sizeof (RFSPartitionType)-1)

enum {
	R_FS_VIEW_NORMAL = 0,
	R_FS_VIEW_DELETED = 1,
	R_FS_VIEW_SPECIAL = 2,
	R_FS_VIEW_ALL = 0xff,
};

#ifdef R_API
R_API RFS *r_fs_new(void);
R_API void r_fs_free(RFS* fs);

R_API void r_fs_view(RFS* fs, int view);
R_API bool r_fs_plugin_add(RFS *fs, RFSPlugin *p);
R_API bool r_fs_plugin_remove(RFS *fs, RFSPlugin *p);
R_API void r_fs_del(RFS *fs, RFSPlugin *p);

R_API RFSRoot *r_fs_mount(RFS* fs, const char *fstype, const char *path, ut64 delta);
R_API RFSRoot *r_fs_mount_with_options(RFS* fs, const char *fstype, const char *path, ut64 delta, const char *options);
R_API bool r_fs_umount(RFS* fs, const char *path);
R_API RFSRoot *r_fs_root_by_fd(RFS *fs, int fd);

R_API RFSFile *r_fs_open(RFS* fs, const char *path, bool create);
R_API void r_fs_close(RFS* fs, RFSFile *file);
R_API int r_fs_read(RFS* fs, RFSFile *file, ut64 addr, int len);
R_API int r_fs_write(RFS* fs, RFSFile* file, ut64 addr, const ut8 *data, int len);
R_API RFSFile *r_fs_slurp(RFS* fs, const char *path);
R_API RList *r_fs_dir(RFS* fs, const char *path);
R_API bool r_fs_dir_dump(RFS* fs, const char *path, const char *name);
R_API bool r_fs_mkdir(RFS *fs, const char *path);

/* Probe `buf` against container-capable fs plugins and return RFSFile entries from the first match. */
R_API RList/*<RFSFile>*/ *r_fs_dir_bins(RFS *fs, RBuffer *buf);

// Search all mounted roots for / or an empty path, otherwise stay below the given directory.
R_API RList *r_fs_find_name(RFS* fs, const char *name, const char *glob);
R_API RList *r_fs_find_off(RFS* fs, const char *name, ut64 off);
R_API RList *r_fs_partitions(RFS* fs, const char *ptype, ut64 delta);

R_API R_MUSTUSE const RFSType *r_fs_type_index(int i);

R_API char *r_fs_name(RFS *fs, ut64 offset);
R_API bool r_fs_check(RFS *fs, const char *p);
R_API bool r_fs_shell(RFSShell *shell, RFS *fs, const char *root);

/* file.c */
R_API RFSFile *r_fs_file_new(RFSRoot *root, const char *path);
R_API void r_fs_file_free(RFSFile *file);
R_API char* r_fs_file_copy_abs_path(RFSFile* file);

/* run a command against registered fs plugins. Returns true if handled */
R_API bool r_fs_cmd(RFS *fs, const char *cmd);

// root
R_API RList *r_fs_root(RFS *fs, const char *path);
R_API RFSRoot *r_fs_root_new(const char *path, ut64 delta);
R_API void r_fs_root_free(RFSRoot *root);
R_API RFSPartition *r_fs_partition_new(int num, ut64 start, ut64 length);
R_API void r_fs_partition_free(RFSPartition *p);
R_API const char *r_fs_partition_type(const char *part, int type);
R_API const char *r_fs_partition_type_get(int n);

/* plugins */
extern RFSPlugin r_fs_plugin_affs;
extern RFSPlugin r_fs_plugin_afs;
extern RFSPlugin r_fs_plugin_bfs;
extern RFSPlugin r_fs_plugin_btrfs;
extern RFSPlugin r_fs_plugin_cpio;
extern RFSPlugin r_fs_plugin_ext2;
extern RFSPlugin r_fs_plugin_fat;
extern RFSPlugin r_fs_plugin_fb;
extern RFSPlugin r_fs_plugin_fossil;
extern RFSPlugin r_fs_plugin_hfs;
extern RFSPlugin r_fs_plugin_hfsplus;
extern RFSPlugin r_fs_plugin_io;
extern RFSPlugin r_fs_plugin_iso9660;
extern RFSPlugin r_fs_plugin_jfs;
extern RFSPlugin r_fs_plugin_minix;
extern RFSPlugin r_fs_plugin_ntfs;
extern RFSPlugin r_fs_plugin_p9;
extern RFSPlugin r_fs_plugin_posix;
extern RFSPlugin r_fs_plugin_r2;
extern RFSPlugin r_fs_plugin_tmp;
extern RFSPlugin r_fs_plugin_reiserfs;
extern RFSPlugin r_fs_plugin_sfs;
extern RFSPlugin r_fs_plugin_squashfs;
extern RFSPlugin r_fs_plugin_tar;
extern RFSPlugin r_fs_plugin_tar;
extern RFSPlugin r_fs_plugin_udf;
extern RFSPlugin r_fs_plugin_ufs2;
extern RFSPlugin r_fs_plugin_ufs;
extern RFSPlugin r_fs_plugin_xfs;
extern RFSPlugin r_fs_plugin_zip;
extern RFSPlugin r_fs_plugin_apfs;
extern RFSPlugin r_fs_plugin_ubifs;
extern RFSPlugin r_fs_plugin_fatmacho;
extern RFSPlugin r_fs_plugin_sep64;
#endif

#ifdef __cplusplus
}
#endif

#endif