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/*
 * Copyright 2005-2006 Gentoo Foundation
 * Distributed under the terms of the GNU General Public License v2
 * $Header: /var/cvsroot/gentoo-projects/portage-utils/quse.c,v 1.45 2006/01/07 16:25:28 solar Exp $
 *
 * Copyright 2005-2006 Ned Ludd        - <solar@gentoo.org>
 * Copyright 2005-2006 Mike Frysinger  - <vapier@gentoo.org>
 */

/*
 quse -CKe -- '-*' {'~',-,}{alpha,amd64,hppa,ia64,ppc,ppc64,sparc,x86}
 quse -Ke --  nls
*/

#ifdef APPLET_quse

#define QUSE_FLAGS "eavKLD" COMMON_FLAGS
static struct option const quse_long_opts[] = {
	{"exact",     no_argument, NULL, 'e'},
	{"all",       no_argument, NULL, 'a'},
	{"keywords",  no_argument, NULL, 'K'},
	{"license",   no_argument, NULL, 'L'},
	{"describe",  no_argument, NULL, 'D'},
	/* {"format",     a_argument, NULL, 'F'}, */
	COMMON_LONG_OPTS
};
static const char *quse_opts_help[] = {
	"Show exact non regexp matching using strcmp",
	"Show annoying things in IUSE",
	"Use the KEYWORDS vs IUSE",
	"Use the LICENSE vs IUSE",
	"Describe the USE flag",
	/* "Use your own variable formats. -F NAME=", */
	COMMON_OPTS_HELP
};
static const char quse_rcsid[] = "$Id: quse.c,v 1.45 2006/01/07 16:25:28 solar Exp $";
#define quse_usage(ret) usage(ret, QUSE_FLAGS, quse_long_opts, quse_opts_help, lookup_applet_idx("quse"))

int quse_describe_flag(int ind, int argc, char **argv);

static void print_highlighted_use_flags(char *string, int ind, int argc, char **argv) {
	char *str, *p;
	char buf[BUFSIZ];
	size_t pos, len;
	short highlight = 0;
	int i;

	strncpy(buf, string, sizeof(buf));
	str = buf;
	remove_extra_space(str);
	rmspace(str);

	if (*WHITE != '\e') {
		printf("%s", str);
		return;
	}

	len = strlen(str);
	for (pos = 0; pos < len; pos++) {
		highlight = 0;
		if ((p = strchr(str, ' ')) != NULL)
			*p = 0;
		pos += strlen(str);
		for (i = ind; i < argc; ++i)
			if (strcmp(str, argv[i]) == 0)
				highlight = 1;
		if (highlight)
			printf("%s%s%s ", BOLD, str, NORM);
		else
			printf("%s%s%s%s ", NORM, MAGENTA, str, NORM);
		if (p != NULL)
			str = p + 1;
	}
}

int quse_describe_flag(int ind, int argc, char **argv)
{
#define NUM_SEARCH_FILES ARR_SIZE(search_files)
	char buf[BUFSIZE], *p;
	int i, f;
	size_t s;
	const char *search_files[] = { "use.desc", "use.local.desc", "arch.list", "lang.desc" };
	FILE *fp[NUM_SEARCH_FILES];

	for (i = 0; i < NUM_SEARCH_FILES; ++i) {
		snprintf(buf, sizeof(buf), "%s/profiles/%s", portdir, search_files[i]);
		if ((fp[i] = fopen(buf, "r")) == NULL)
			warnp("skipping %s", search_files[i]);
	}

	for (i = ind; i < argc; i++) {
		s = strlen(argv[i]);

		for (f = 0; f < NUM_SEARCH_FILES; ++f) {
			if (fp[f] == NULL)
				continue;

			while (fgets(buf, sizeof(buf), fp[f]) != NULL) {
				if (buf[0] == '#' || buf[0] == '\n')
					continue;

				if ((p = strrchr(buf, '\n')) != NULL)
					*p = '\0';

				switch (f) {
					case 0: /* Global use.desc */
						if (!strncmp(buf, argv[i], s))
							if (buf[s] == ' ' && buf[s+1] == '-') {
								printf(" %sglobal%s:%s%s%s: %s\n", BOLD, NORM, BLUE, argv[i], NORM, buf+s+3);
								goto skip_file;
							}
						break;

					case 1: /* Local use.local.desc */
						if ((p = strchr(buf, ':')) == NULL)
							break;
						++p;
						if (!strncmp(p, argv[i], s)) {
							if (p[s] == ' ' && p[s+1] == '-') {
								*p = '\0';
								printf(" %slocal%s:%s%s%s:%s%s%s %s\n", BOLD, NORM, BLUE, argv[i], NORM, BOLD, buf, NORM, p+s+3);
							}
						}
						break;

					case 2: /* Architectures arch.list */
						if (!strcmp(buf, argv[i])) {
							printf(" %sarch%s:%s%s%s: %s architecture\n", BOLD, NORM, BLUE, argv[i], NORM, argv[i]);
							goto skip_file;
						}
						break;

					case 3: /* Languages lang.desc */
						if (!strncmp(buf, argv[i], s))
							if (buf[s] == ' ' && buf[s+1] == '-') {
								printf(" %slang%s:%s%s%s: %s lingua\n", BOLD, NORM, BLUE, argv[i], NORM, buf+s+3);
								goto skip_file;
							}
						break;
				}
			}

skip_file:
			rewind(fp[f]);
		}
	}

	for (f=0; f<NUM_SEARCH_FILES; ++f)
		fclose(fp[f]);

	return 0;
}

int quse_main(int argc, char **argv)
{
	FILE *fp;
	char *p;

	char buf0[_Q_PATH_MAX];
	char buf1[_Q_PATH_MAX];
	char buf2[_Q_PATH_MAX];

	char ebuild[_Q_PATH_MAX];

	const char *search_var = NULL;
	const char *search_vars[] = { "IUSE=", "KEYWORDS=", "LICENSE=", search_var };
	short all = 0;
	int regexp_matching = 1, i, idx = 0;
	size_t search_len;

	DBG("argc=%d argv[0]=%s argv[1]=%s",
	    argc, argv[0], argc > 1 ? argv[1] : "NULL?");

	while ((i = GETOPT_LONG(QUSE, quse, "")) != -1) {
		switch (i) {
		case 'e': regexp_matching = 0; break;
		case 'a': all = 1; break;
		case 'K': idx = 1; break;
		case 'L': idx = 2; break;
		case 'D': idx = -1; break;
		/* case 'F': idx = 3, search_vars[idx] = xstrdup(optarg); break; */
		COMMON_GETOPTS_CASES(quse)
		}
	}
	if (argc == optind && !all && idx >= 0)
		quse_usage(EXIT_FAILURE);

	if (idx == -1)
		return quse_describe_flag(optind, argc, argv);

	if (all) optind = argc;
	initialize_ebuild_flat();	/* sets our pwd to $PORTDIR */

	search_len = strlen(search_vars[idx]);
	assert(search_len < sizeof(buf0));

	if ((fp = fopen(CACHE_EBUILD_FILE, "r")) == NULL)
		return 1;
	while ((fgets(ebuild, sizeof(ebuild), fp)) != NULL) {
		FILE *newfp;
		if ((p = strchr(ebuild, '\n')) != NULL)
			*p = 0;
		if ((newfp = fopen(ebuild, "r")) != NULL) {
			unsigned int lineno = 0;
			char revision[sizeof(buf0)];
			char date[sizeof(buf0)];
			char user[sizeof(buf0)];

			revision[0] = 0;
			user[0] = 0;
			date[0] = 0;
			while ((fgets(buf0, sizeof(buf0), newfp)) != NULL) {
				int ok = 0;
				char warned = 0;
				lineno++;

				if (*buf0 == '#') {
					if ((strncmp(buf0, "# $Header: /", 12)) == 0)
						sscanf(buf0, "%*s %*s %*s %s %s %*s %s %*s %*s", (char *) &revision, (char *) &date, (char *) &user);
					continue;
				}
				if ((strncmp(buf0, search_vars[idx], search_len)) != 0)
					continue;

				if ((p = strchr(buf0, '\n')) != NULL)
					*p = 0;
				if ((p = strchr(buf0, '#')) != NULL) {
					if (buf0 != p && p[-1] == ' ')
						p[-1] = 0;
					else
						*p = 0;
				}
				if (verbose > 1) {
					if ((strchr(buf0, '\t') != NULL)
					    || (strchr(buf0, '$') != NULL)
					    || (strchr(buf0, '\\') != NULL)
					    || (strchr(buf0, '\'') != NULL)
					    || (strstr(buf0, "  ") != NULL)) {
						warned = 1;
						warn("# Line %d of %s has an annoying %s", lineno, ebuild, buf0);
					}
				}
#ifdef THIS_SUCKS
				if ((p = strrchr(&buf0[search_len+1], '\\')) != NULL) {

				multiline:
					*p = ' ';
					memset(buf1, 0, sizeof(buf1));

					if ((fgets(buf1, sizeof(buf1), newfp)) == NULL)
						continue;
					lineno++;

					if ((p = strchr(buf1, '\n')) != NULL)
						*p = 0;
					snprintf(buf2, sizeof(buf2), "%s %s", buf0, buf1);
					remove_extra_space(buf2);
					strcpy(buf0, buf2);
					if ((p = strrchr(buf1, '\\')) != NULL)
						goto multiline;
				}
#else
				remove_extra_space(buf0);
#endif
				while ((p = strrchr(&buf0[search_len+1], '"')) != NULL)  *p = 0;
				while ((p = strrchr(&buf0[search_len+1], '\'')) != NULL) *p = 0;
				while ((p = strrchr(&buf0[search_len+1], '\\')) != NULL) *p = ' ';

				if (verbose && warned == 0) {
					if ((strchr(buf0, '$') != NULL) || (strchr(buf0, '\\') != NULL)) {
						warned=1;
						warn("# Line %d of %s has an annoying %s", lineno, ebuild, buf0);
					}
				}

				if ((size_t)strlen(buf0) < (size_t)(search_len+1)) {
					// warnf("err '%s'/%lu <= %lu; line %d\n", buf0, (unsigned long)strlen(buf0), (unsigned long)(search_len+1), lineno);
					continue;
				}

				if ((argc == optind) || (all)) {
					ok = 1;
				} else {
					ok = 0;
					if (regexp_matching) {
						for (i = optind; i < argc; ++i) {
							if (rematch(argv[i], &buf0[search_len+1], REG_NOSUB) == 0) {
								ok = 1;
								break;
							}
						}
					} else {
						remove_extra_space(buf0);
						assert(buf0 != NULL);
						strcpy(buf1, &buf0[search_len+1]);

						for (i = (size_t) optind; i < argc && argv[i] != NULL; i++) {
							if (strcmp(buf1, argv[i]) == 0) {
								ok = 1;
								break;
							}
						}
						if (ok == 0) while ((p = strchr(buf1, ' ')) != NULL) {
							*p = 0;
							for (i = (size_t) optind; i < argc && argv[i] != NULL; i++) {
								if (strcmp(buf1, argv[i]) == 0) {
									ok = 1;
									break;
								}
							}
							strcpy(buf2, p + 1);
							strcpy(buf1, buf2);
							if ((strchr(buf1, ' ')) == NULL)
								for (i = (size_t) optind; i < argc && argv[i] != NULL; i++) {
									if (strcmp(buf1, argv[i]) == 0) {
										ok = 1;
									}
								}
						}
					}
				}
				if (ok) {
					if (verbose > 3)
						printf("%s %s %s ", *user ? user : "MISSING", *revision ? revision : "MISSING", *date ? date : "MISSING");

					printf("%s%s%s ", CYAN, ebuild, NORM);
					print_highlighted_use_flags(&buf0[search_len+1], optind, argc, argv);
					puts(NORM);
					if (verbose > 1) {
						char **ARGV = NULL;
						int ARGC = 0;
						makeargv(&buf0[search_len+1], &ARGC, &ARGV);
						if (ARGC > 0) {
							quse_describe_flag(1, ARGC, ARGV);
							for (i = 0; i < ARGC; i++)
								free(ARGV[i]);
							free(ARGV);
						}
					}
				}
				break;
			}
			fclose(newfp);
		} else {
			if (!reinitialize)
				warnf("(cache update pending) %s : %s", ebuild, strerror(errno));
			reinitialize = 1;
		}
	}
	fclose(fp);
	return EXIT_SUCCESS;
}

#else /* ! APPLET_quse */
int quse_main(int argc, char **argv) {
	errf("%s", err_noapplet);
}
#endif /* APPLET_quse */