#ifndef NTUX_H
#define NTUX_H

#include <stdint.h>

#include "ntux_api.h"

#ifdef __cplusplus
extern "C" {
#endif

/* pre-alpha */
#ifndef NTUX_APP
#ifndef NTUX_PRE_ALPHA
#error  libntux: pre-alpha: ABI is not final!
#error  to use the library, please pass -DNTUX_PRE_ALPHA to the compiler.
#endif
#endif

/* status codes */
#define NTUX_OK				0x00
#define NTUX_USAGE			0x01
#define NTUX_ERROR			0x02

/* driver flags */
#define NTUX_DRIVER_VERBOSITY_NONE	0x0000
#define NTUX_DRIVER_VERBOSITY_ERRORS	0x0001
#define NTUX_DRIVER_VERBOSITY_STATUS	0x0002
#define NTUX_DRIVER_VERBOSITY_USAGE	0x0004
#define NTUX_DRIVER_CLONE_VECTOR	0x0008

#define NTUX_DRIVER_VERSION		0x0010
#define NTUX_DRIVER_DRY_RUN		0x0020
#define NTUX_DRIVER_VERBOSE		0x0040
#define NTUX_DRIVER_SILENT		0x0080

#define NTUX_DRIVER_RECURSIVE		0x0100
#define NTUX_DRIVER_CHANGES		0x0200
#define NTUX_DRIVER_ROOTED		0x0400
#define NTUX_DRIVER_ROOTLESS		0x0800

#define NTUX_DRIVER_ANNOTATE_ALWAYS	0x10000000
#define NTUX_DRIVER_ANNOTATE_NEVER	0x20000000
#define NTUX_DRIVER_ANNOTATE_FULL	0x40000000

/* error flags */
#define NTUX_ERROR_TOP_LEVEL		0x0001
#define NTUX_ERROR_NESTED		0x0002
#define NTUX_ERROR_CHILD		0x0004
#define NTUX_ERROR_CUSTOM		0x0008
#define NTUX_ERROR_NATIVE		0x0010

enum ntux_custom_error {
	NTUX_ERR_FLOW_ERROR,
	NTUX_ERR_FLEE_ERROR,
	NTUX_ERR_LDSO_INIT,
	NTUX_ERR_NOT_IMPLEMENTED,
};

enum ntux_cmd {
	NTUX_CMD_DEFAULT,
	NTUX_CMD_STAT,
	NTUX_CMD_SPAWN,
	NTUX_CMD_STRACE,
	NTUX_CMD_CHMOD,
	NTUX_CMD_CAP,
};

struct ntux_source_version {
	int		major;
	int		minor;
	int		revision;
	const char *	commit;
};

struct ntux_fd_ctx {
	int		fdin;
	int		fdout;
	int		fderr;
	int		fdlog;
	int		fdcwd;
	int		fddst;
};

struct ntux_error_info {
	const struct ntux_driver_ctx *	edctx;
	const struct ntux_unit_ctx *	euctx;
	const char *			eunit;
	int				esyscode;
	int				elibcode;
	const char *			efunction;
	int				eline;
	unsigned			eflags;
	void *				eany;
};

struct ntux_common_ctx {
	uint64_t			drvflags;
	uint64_t			actflags;
	uint64_t			fmtflags;
	enum ntux_cmd			cmd;
	int32_t				status;
	char **				sargv;
	char **				senvp;
	const char *			loader;
	const char *			logfile;
	const char *			refmode;
	const char *			strmode;
	const char *			owner;
	const char *			group;
	uint32_t			sysmask[16];
	uint32_t			dbgmask[16];
	uint32_t			osmask [32];
};

struct ntux_driver_ctx {
	const char **			units;
	const char *			program;
	const char *			module;
	const struct ntux_common_ctx *	cctx;
	struct ntux_error_info **	errv;
	void *				any;
};

struct ntux_unit_ctx {
	const char * const *		path;
	void *				any;
};

/* driver api */
ntux_api int  ntux_get_driver_ctx       (char **, char **, uint32_t,
                                         const struct ntux_fd_ctx *,
                                         struct ntux_driver_ctx **);

ntux_api void ntux_free_driver_ctx      (struct ntux_driver_ctx *);

ntux_api int  ntux_get_driver_fdctx     (const struct ntux_driver_ctx *, struct ntux_fd_ctx *);
ntux_api int  ntux_set_driver_fdctx     (struct ntux_driver_ctx *, const struct ntux_fd_ctx *);

/* cmd api */
ntux_api int  ntux_cmd_chmod            (const struct ntux_driver_ctx *, const char *);
ntux_api int  ntux_cmd_stat             (const struct ntux_driver_ctx *, const char *);
ntux_api int  ntux_cmd_spawn            (const struct ntux_driver_ctx *);
ntux_api int  ntux_cmd_strace           (const struct ntux_driver_ctx *);

/* utility api */
ntux_api int  ntux_main                 (char **, char **, const struct ntux_fd_ctx *);

/* error trace api */
ntux_api int  ntux_output_error_vector  (const struct ntux_driver_ctx *);

/* package info */
ntux_api const struct ntux_source_version * ntux_source_version(void);

#ifdef __cplusplus
}
#endif

#endif