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/* grecs - Gray's Extensible Configuration System
   Copyright (C) 2007-2011 Sergey Poznyakoff

   Grecs is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 3 of the License, or (at your
   option) any later version.

   Grecs is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with Grecs. If not, see <http://www.gnu.org/licenses/>. */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <errno.h>
#include "grecs.h"

static void
usage(const char *arg, FILE *fp, int code)
{
	fprintf(fp,
		"usage: %s [-h] [-locus] [-delim=char] [-reduce] [-sort] "
		"[-type=grecs|bind|meta1|git] file [file...]\n",
		arg);
	exit(code);
}

static int
node_ident_cmp(struct grecs_node const *a, struct grecs_node const *b)
{
	return strcmp(a->ident, b->ident);
}
	
int
main(int argc, char **argv)
{
	char *progname = argv[0];
	char *file = NULL;
	struct grecs_node *tree;
	int flags = GRECS_NODE_FLAG_DEFAULT;
	int reduce = 0;
	int sort = 0;
	
	while (--argc) {
		char *arg = *++argv;
		if (strcmp(arg, "-locus") == 0)
			flags |= GRECS_NODE_FLAG_LOCUS;
		else if (strncmp(arg, "-delim=", 7) == 0)
			flags |= arg[7];
		else if (strcmp(arg, "-reduce") == 0)
			reduce = 1;
		else if (strcmp(arg, "-sort") == 0)
			sort = 1;
		else if (strcmp(arg, "-h") == 0)
			usage(progname, stdout, 0);
		else if (strncmp(arg, "-type=", 6) == 0) {
			if (strcasecmp(arg+6, "GRECS") == 0)
				grecs_parser_fun = grecs_grecs_parser;
			else if (strcasecmp(arg+6, "META1") == 0)
				grecs_parser_fun = grecs_meta1_parser;
			else if (strcasecmp(arg+6, "BIND") == 0)
				grecs_parser_fun = grecs_bind_parser;
			else if (strcasecmp(arg+6, "GIT") == 0)
				grecs_parser_fun = grecs_git_parser;
			else
				usage(progname, stderr, 1);
		} else if (arg[0] == '-')
			usage(progname, stderr, 1);
		else {
			file = arg;
			--argc;
			break;
		}
	}
	
	if (!file)
		usage(progname, stderr, 1);

	tree = grecs_parse(file);
	if (!tree)
		exit(1);

	for (; argc; argc--) {
		char *arg = *++argv;
		struct grecs_node *node = grecs_parse(arg);
		if (!node)
			exit(1);
		if (grecs_tree_join(tree, node)) {
			fprintf(stderr, "join failed\n");
			exit(1);
		}
		grecs_tree_free(node);
	}
	
	if (reduce)
		grecs_tree_reduce(tree, NULL, 0);
	if (sort)
		grecs_tree_sort(tree, node_ident_cmp);
	grecs_format_node(tree, flags, stdout);
	fputc('\n', stdout);
	grecs_tree_free(tree);
	exit(0);
}

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