/*-
 * Copyright (c) 2008-2012 Juan Romero Pardines.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifdef HAVE_STRCASESTR
# define _GNU_SOURCE    /* for strcasestr(3) */
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <libgen.h>
#include <fnmatch.h>
#include <assert.h>

#include <xbps_api.h>
#include "defs.h"

struct repo_search_data {
	int npatterns;
	char **patterns;
	void *arg;
	size_t pkgver_len;
	size_t maxcols;
};

static int
repo_longest_pkgver(struct xbps_rindex *rpi, void *arg, bool *done)
{
	size_t *len = arg, olen = 0;

	(void)done;

	if (*len == 0) {
		*len = find_longest_pkgver(rpi->xhp, rpi->repod);
		return 0;
	}
	olen = find_longest_pkgver(rpi->xhp, rpi->repod);
	if (olen > *len)
		*len = olen;

	return 0;
}

static size_t
repo_find_longest_pkgver(struct xbps_handle *xhp)
{
	size_t len = 0;

	xbps_rpool_foreach(xhp, repo_longest_pkgver, &len);

	return len;
}

static int
repo_search_pkgs_cb(struct xbps_rindex *rpi, void *arg, bool *done)
{
	prop_array_t allkeys;
	prop_dictionary_t pkgd;
	prop_dictionary_keysym_t ksym;
	struct repo_search_data *rsd = arg;
	const char *pkgver, *pkgname, *desc, *inststr;
	char tmp[255], *out = NULL;
	size_t i, j, len, maxcols;
	int x;

	(void)done;

	maxcols = rsd->maxcols - 4; /* - "...\n" */

	allkeys = prop_dictionary_all_keys(rpi->repod);
	for (i = 0; i < prop_array_count(allkeys); i++) {
		ksym = prop_array_get(allkeys, i);
		pkgd = prop_dictionary_get_keysym(rpi->repod, ksym);

		prop_dictionary_get_cstring_nocopy(pkgd, "pkgname", &pkgname);
		prop_dictionary_get_cstring_nocopy(pkgd, "pkgver", &pkgver);
		prop_dictionary_get_cstring_nocopy(pkgd, "short_desc", &desc);

		for (x = 0; x < rsd->npatterns; x++) {
			if ((xbps_pkgpattern_match(pkgver, rsd->patterns[x])) ||
			    (xbps_pkgpattern_match(desc, rsd->patterns[x]))  ||
			    (strcasecmp(pkgname, rsd->patterns[x]) == 0) ||
			    (strcasestr(pkgver, rsd->patterns[x])) ||
			    (strcasestr(desc, rsd->patterns[x]))) {
				strncpy(tmp, pkgver, sizeof(tmp));
				for (j = strlen(tmp); j < rsd->pkgver_len; j++)
					tmp[j] = ' ';

				tmp[j] = '\0';
				if (xbps_pkgdb_get_pkg(rpi->xhp, pkgver))
					inststr = "[*]";
				else
					inststr = "[-]";

				len = strlen(inststr) + strlen(tmp) +
				      strlen(desc);
				if (len > maxcols) {
					out = malloc(maxcols);
					assert(out);
					snprintf(out, maxcols, "%s %s %s",
					    inststr, tmp, desc);
					printf("%s...\n", out);
					free(out);
				} else {
					printf("%s %s %s\n", inststr,
					    tmp, desc);
				}
			}
		}
	}
	prop_object_release(allkeys);

	return 0;
}

int
repo_search(struct xbps_handle *xhp, int npatterns, char **patterns)
{
	struct repo_search_data rsd;
	int rv;

	rsd.npatterns = npatterns;
	rsd.patterns = patterns;
	rsd.pkgver_len = repo_find_longest_pkgver(xhp);
	rsd.maxcols = get_maxcols();

	rv = xbps_rpool_foreach(xhp, repo_search_pkgs_cb, &rsd);
	if (rv != 0 && rv != ENOTSUP)
		fprintf(stderr, "Failed to initialize rpool: %s\n",
		    strerror(rv));

	return rv;
}