/**************************************************************/
/*  treebnf: a tree oriented bnf library                      */
/*  Copyright (C) 2024  SysDeer Technologies, LLC             */
/*  Released under GPLv2 and GPLv3; see COPYING.TREEBNF.      */
/**************************************************************/

#include <stdio.h>
#include <unistd.h>
#include <treebnf/treebnf.h>
#include "treebnf_driver_impl.h"
#include "treebnf_dprintf_impl.h"

#ifndef TBNF_DRIVER_FLAGS
#define TBNF_DRIVER_FLAGS	TBNF_DRIVER_VERBOSITY_ERRORS \
				| TBNF_DRIVER_VERBOSITY_USAGE
#endif

static const char vermsg[] = "%s%s%s (https://git.foss21.org/tulips/treebnf): "
			     "version %s%d.%d.%d%s.\n"
			     "[commit reference: %s%s%s]\n";

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

static ssize_t tbnf_version(struct tbnf_driver_ctx * dctx, int fdout)
{
	const struct tbnf_source_version * verinfo;
	const char * const * verclr;

	verinfo = tbnf_api_source_version();
	verclr  = isatty(fdout) ? tbnf_ver_color : tbnf_ver_plain;

	return tbnf_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 tbnf_perform_unit_actions(
	const struct tbnf_driver_ctx *	dctx,
	struct tbnf_unit_ctx *		uctx)
{
	uint64_t flags = dctx->cctx->fmtflags;

	(void)dctx;
	(void)uctx;
	(void)flags;
}

static int tbnf_exit(struct tbnf_driver_ctx * dctx, int ret)
{
	tbnf_output_error_vector(dctx);
	tbnf_lib_free_driver_ctx(dctx);
	return ret;
}

int tbnf_main(char ** argv, char ** envp, const struct tbnf_fd_ctx * fdctx)
{
	int                         ret;
	int                         fdout;
	uint64_t                    flags;
	struct tbnf_driver_ctx *    dctx;
	struct tbnf_unit_ctx *      uctx;
	const char **               unit;

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

	if ((ret = tbnf_lib_get_driver_ctx(argv,envp,flags,fdctx,&dctx)))
		return (ret == TBNF_USAGE)
			? !argv || !argv[0] || !argv[1]
			: TBNF_ERROR;

	if (dctx->cctx->drvflags & TBNF_DRIVER_VERSION)
		if ((tbnf_version(dctx,fdout)) < 0)
			return tbnf_exit(dctx,TBNF_ERROR);

	for (unit=dctx->units; *unit; unit++) {
		if (!(tbnf_lib_get_unit_ctx(dctx,*unit,&uctx))) {
			tbnf_perform_unit_actions(dctx,uctx);
			tbnf_lib_free_unit_ctx(uctx);
		}
	}

	return tbnf_exit(dctx,dctx->errv[0] ? TBNF_ERROR : TBNF_OK);
}