#ifndef FX_IO_FILE_H_
#define FX_IO_FILE_H_

#include <fx/error.h>
#include <fx/macros.h>
#include <fx/misc.h>
#include <fx/stream.h>

FX_DECLS_BEGIN;

#define FX_TYPE_FILE (fx_file_get_type())

FX_DECLARE_TYPE(fx_file);

FX_TYPE_CLASS_DECLARATION_BEGIN(fx_file)
FX_TYPE_CLASS_DECLARATION_END(fx_file)

#define FX_OFFSET_CURRENT ((size_t)-1)

typedef enum fx_seek_basis {
	FX_SEEK_BEGINNING,
	FX_SEEK_CURRENT,
	FX_SEEK_END
} fx_seek_basis;

typedef enum fx_file_attribute {
	FX_FILE_ATTRIB_NORMAL = 0x01u,
	FX_FILE_ATTRIB_DIRECTORY = 0x02u,
	FX_FILE_ATTRIB_BLOCK_DEVICE = 0x04u,
	FX_FILE_ATTRIB_CHAR_DEVICE = 0x08u,
	FX_FILE_ATTRIB_SYMLINK = 0x80u,
} fx_file_attribute;

typedef enum fx_file_mode {
	FX_FILE_READ_ONLY = 0x01u,
	FX_FILE_WRITE_ONLY = 0x02u,
	FX_FILE_READ_WRITE = FX_FILE_READ_ONLY | FX_FILE_WRITE_ONLY,
	FX_FILE_TRUNCATE = 0x04u,
	FX_FILE_CREATE = 0x08u,
	FX_FILE_CREATE_ONLY = 0x10u | FX_FILE_CREATE,
	FX_FILE_APPEND = 0x20u,
	FX_FILE_BINARY = 0x40u,
	FX_FILE_DELETE_ON_CLOSE = 0x80u,
	FX_FILE_SHADOW = 0x100u,
} fx_file_mode;

typedef struct fx_file_info {
	fx_file_attribute attrib;
	fx_file_mode mode;

	size_t length;
} fx_file_info;

FX_API fx_type_id fx_file_get_type(void);

FX_API fx_result fx_file_open(
	FX_TYPE_FWDREF(fx_directory) * root,
	const FX_TYPE_FWDREF(fx_path) * path,
	fx_file_mode mode,
	fx_file **out);
FX_API fx_result fx_file_open_temp(fx_file_mode mode, fx_file **out);
FX_API fx_result
fx_file_open_shadow(fx_file *original, fx_file_mode mode, fx_file **out);

FX_API fx_status fx_file_stat(fx_file *file, fx_file_info *out);
FX_API fx_status fx_file_size(fx_file *file, size_t *out_len);
FX_API fx_status fx_file_cursor(fx_file *file, size_t *out_pos);
FX_API fx_status fx_file_resize(fx_file *file, size_t len);
FX_API fx_status
fx_file_seek(fx_file *file, long long offset, fx_seek_basis basis);
FX_API const FX_TYPE_FWDREF(fx_path) * fx_file_path(const fx_file *file);

FX_API fx_status fx_file_swap_shadow(fx_file *main_file, fx_file *shadow_file);

FX_API fx_status fx_file_read(
	fx_file *file,
	size_t offset,
	size_t len,
	void *buf,
	size_t *nr_read);
FX_API fx_status fx_file_write(
	fx_file *file,
	size_t offset,
	size_t len,
	const void *buf,
	size_t *nr_written);

FX_DECLS_END;

#endif