/*
 * Copyright (c) 2011-2012 Marin Atanasov Nikolov <dnaeon@gmail.com>
 * 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
 *    in this position and unchanged.
 * 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(S) ``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(S) 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.
 */

#include <sys/types.h>

#include <err.h>
#include <libgen.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <libutil.h>

#include <pkg.h>

#include "pkgcli.h"

void
usage_fetch(void)
{
	fprintf(stderr, "usage: pkg fetch [-r reponame] [-yqgxXadL] <pkg-name> <...>\n\n");
	fprintf(stderr, "For more information see 'pkg help fetch'.\n");
}

int
exec_fetch(int argc, char **argv)
{
	struct pkg *pkg = NULL;
	struct pkgdb_it *it = NULL;
	struct pkgdb *db = NULL;
	struct pkg_jobs *jobs = NULL;
	const char *reponame = NULL;
	int retcode = EX_SOFTWARE;
	int ch;
	int flags = PKG_LOAD_BASIC;
	bool yes = false;
	bool auto_update = true;
	match_t match = MATCH_EXACT;

	while ((ch = getopt(argc, argv, "ygxXr:qaLd")) != -1) {
		switch (ch) {
		case 'y':
			yes = true;
			break;
		case 'a':
			match = MATCH_ALL;
			break;
		case 'g':
			match = MATCH_GLOB;
			break;
		case 'x':
			match = MATCH_REGEX;
			break;
		case 'X':
			match = MATCH_EREGEX;
			break;
		case 'r':
			reponame = optarg;
			break;
		case 'q':
			quiet = true;
			break;
		case 'L':
			auto_update = false;
			break;
		case 'd':
			flags |= PKG_LOAD_DEPS;
			break;
		default:
			usage_fetch();
			return (EX_USAGE);
		}
	}
	argc -= optind;
	argv += optind;
	
	if (argc < 1 && match != MATCH_ALL) {
		usage_fetch();
		return (EX_USAGE);
	}

	/* TODO: Allow the user to specify an output directory via -o outdir */
	if (geteuid() != 0) {
		warnx("Fetching packages can only be done as root");
		return (EX_NOPERM);
	}

	/* first update the remote repositories if needed */
	if (auto_update && (retcode = pkgcli_update(false)) != EPKG_OK)
		return (retcode);

	if (pkgdb_open(&db, PKGDB_REMOTE) != EPKG_OK) {
		return (EX_IOERR);
	}

	if (pkg_jobs_new(&jobs, PKG_JOBS_FETCH, db, false, false) != EPKG_OK) {
		goto cleanup;
	}

	if ((it = pkgdb_query_fetch(db, match, argc, argv, reponame, flags)) == NULL)
		goto cleanup;

	while (pkgdb_it_next(it, &pkg, flags) == EPKG_OK) {
		pkg_jobs_add(jobs, pkg);
		pkg = NULL;
	}
	
	pkgdb_it_free(it);

	if (pkg_jobs_is_empty(jobs))
		goto cleanup;

	if (!quiet) {
		print_jobs_summary(jobs, PKG_JOBS_FETCH, "The following packages will be fetched:\n\n");
		
		if (!yes)
			pkg_config_bool(PKG_CONFIG_ASSUME_ALWAYS_YES, &yes);
		if (!yes)
			yes = query_yesno("\nProceed with fetching packages [y/N]: ");
	}
	
	if (yes)
		if (pkg_jobs_apply(jobs) != EPKG_OK)
			goto cleanup;

	retcode = EX_OK;

	cleanup:
	pkg_jobs_free(jobs);
	pkgdb_close(db);

	return (retcode);
}
