/***********************************************************/
/*  ntux: native translation und extension                 */
/*  Copyright (C) 2016--2018  Z. Gilboa                    */
/*  Released under GPLv2 and GPLv3; see COPYING.NTUX.      */
/***********************************************************/

#include <stdio.h>
#include <unistd.h>

#include <ntux/ntux.h>
#include "ntux_dprintf_impl.h"
#include "ntux_driver_impl.h"
#include "ntux_nolibc_impl.h"

#ifndef NTUX_DRIVER_FLAGS
#define NTUX_DRIVER_FLAGS	NTUX_DRIVER_VERBOSITY_ERRORS \
				| NTUX_DRIVER_VERBOSITY_USAGE
#endif

static const char vermsg[] = "%s%s%s (git://midipix.org/ntux): "
			     "version %s%d.%d.%d%s.\n"
			     "[commit reference: %s%s%s]\n";

static const char * const ntux_ver_color[6] = {
		"\x1b[1m\x1b[35m","\x1b[0m",
		"\x1b[1m\x1b[32m","\x1b[0m",
		"\x1b[1m\x1b[34m","\x1b[0m"
};

static const char * const ntux_ver_plain[6] = {
		"","",
		"","",
		"",""
};

static ssize_t ntux_version(struct ntux_driver_ctx * dctx, int fdout)
{
	const struct ntux_source_version * verinfo;
	const char * const * verclr;

	verinfo = ntux_source_version();
	verclr  = isatty(fdout) ? ntux_ver_color : ntux_ver_plain;

	return ntux_dprintf(
			fdout,vermsg,
			verclr[0],dctx->program,verclr[1],
			verclr[2],verinfo->major,verinfo->minor,
			verinfo->revision,verclr[3],
			verclr[4],verinfo->commit,verclr[5]);
}

static void ntux_perform_unit_actions(
	const struct ntux_driver_ctx *	dctx,
	const char *			unit)
{
	if (dctx->cctx->cmd == NTUX_CMD_STAT)
		ntux_cmd_stat(dctx,unit);
}

static int ntux_exit(struct ntux_driver_ctx * dctx, int ret)
{
	ntux_output_error_vector(dctx);
	ntux_free_driver_ctx(dctx);
	return ret;
}

int ntux_main(char ** argv, char ** envp, const struct ntux_fd_ctx * fdctx)
{
	int				ret;
	int				fdout;
	uint64_t			flags;
	struct ntux_driver_ctx *	dctx;
	const char **			unit;

	flags = NTUX_DRIVER_FLAGS;
	fdout = fdctx ? fdctx->fdout : STDOUT_FILENO;

	if ((ret = ntux_get_driver_ctx(argv,envp,flags,fdctx,&dctx)))
		return (ret == NTUX_USAGE)
			? !argv || !argv[0] || !argv[1]
			: NTUX_ERROR;

	if (dctx->cctx->drvflags & NTUX_DRIVER_VERSION)
		if ((ntux_version(dctx,fdout)) < 0)
			return ntux_exit(dctx,NTUX_ERROR);

	if (dctx->cctx->cmd == NTUX_CMD_SPAWN)
		ntux_cmd_spawn(dctx);

	if (dctx->cctx->cmd == NTUX_CMD_STRACE)
		ntux_cmd_strace(dctx);

	for (unit=dctx->units; *unit; unit++)
		ntux_perform_unit_actions(dctx,*unit);

	return ntux_exit(dctx,dctx->errv[0] ? NTUX_ERROR : NTUX_OK);
}