/*
 *  query.c
 * 
 *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
 * 
 *  This program 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
 *  USA.
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <string.h>
#include <sys/stat.h>
#include <libintl.h>
#include <errno.h>
#include <unistd.h>

#include <alpm.h>
#include <alpm_list.h>

/* pacman */
#include "query.h"
#include "package.h"
#include "log.h"
#include "conf.h"
#include "sync.h"
#include "util.h"

extern config_t *config;
extern pmdb_t *db_local;

static char *resolve_path(const char* file)
{
	char *copy, *p, *str = NULL;

	if(!(copy = strdup(file))) {
		return(NULL);
	}

	if((p = strrchr(copy, '/')) == NULL) {
		return(copy);
	} else {
		*p = '\0'; ++p;

		str = calloc(PATH_MAX+1, sizeof(char));
		if(!str) {
			/* null hmmm.... */
			return(NULL);
		}

		if(!realpath(copy, str)) {
			return(NULL);
		}

		str[strlen(str)] = '/';
		strcat(str, p);
	}

	free(copy);
	return(str);
}


static void query_fileowner(pmdb_t *db, char *filename)
{
	struct stat buf;
	int gotcha = 0;
	char *rpath;
	alpm_list_t *i, *j;

	if(db == NULL) {
		return;
	}
	if(filename == NULL || strlen(filename) == 0) {
		ERR(NL, _("no file was specified for --owns\n"));
		return;
	}

	if(stat(filename, &buf) == -1) {
		ERR(NL, _("failed to read file '%s': %s"), filename, strerror(errno));
		return;
	}
	
	if(S_ISDIR(buf.st_mode)) {
		ERR(NL, _("cannot determine ownership of a directory"));
		return;
	}

	if(!(rpath = resolve_path(filename))) {
		ERR(NL, _("cannot determine real path for '%s': %s"), filename, strerror(errno));
		return;
	}

	for(i = alpm_db_getpkgcache(db); i && !gotcha; i = alpm_list_next(i)) {
		pmpkg_t *info = alpm_list_getdata(i);

		for(j = alpm_pkg_get_files(info); j && !gotcha; j = alpm_list_next(j)) {
			char path[PATH_MAX], *ppath;
			snprintf(path, PATH_MAX, "%s%s", alpm_option_get_root(), (const char *)alpm_list_getdata(j));

			ppath = resolve_path(path);

			if(ppath && strcmp(ppath, rpath) == 0) {
				printf(_("%s is owned by %s %s\n"), filename, alpm_pkg_get_name(info), alpm_pkg_get_version(info));
				gotcha = 1;
			}

			free(ppath);
		}
	}
	if(!gotcha) {
		ERR(NL, _("No package owns %s\n"), filename);
	}

	free(rpath);
}

int pacman_query(alpm_list_t *targets)
{
	alpm_list_t *sync_dbs = NULL, *i, *j, *k;
	pmpkg_t *info = NULL;
	char *package = NULL;
	int done = 0;

	if(config->op_q_search) {
		alpm_list_t *ret = alpm_db_search(db_local, targets);
		if(ret == NULL) {
			return(0);
		}
		for(i = ret; i; i = alpm_list_next(i)) {
			char *group = NULL;
			alpm_list_t *grp;
			pmpkg_t *pkg = alpm_list_getdata(i);

			printf("local/%s %s", alpm_pkg_get_name(pkg), alpm_pkg_get_version(pkg));

			if((grp = alpm_pkg_get_groups(pkg)) != NULL) {
				group = alpm_list_getdata(grp);
				printf(" (%s)\n    ", (char *)alpm_list_getdata(grp));
			} else {
				printf("\n    ");
			}

			indentprint(alpm_pkg_get_desc(pkg), 4);
			printf("\n");
		}
		alpm_list_free(ret);
		return(0);
	}

	if(config->op_q_foreign) {
		sync_dbs = alpm_option_get_syncdbs();

		if(sync_dbs == NULL || alpm_list_count(sync_dbs) == 0) {
			ERR(NL, _("no usable package repositories configured.\n"));
			return(1);
		}
	}

	if(config->op_q_upgrade) {
		MSG(NL, _("Checking for package upgrades..."));
		alpm_list_t *syncpkgs;

		if((syncpkgs = alpm_get_upgrades()) != NULL) {
				display_targets(syncpkgs);
				return(0);
		} else {
			MSG(NL, _("no upgrades found"));
			return(1);
		}
	}

	for(i = targets; !done; i = (i ? alpm_list_next(i) : NULL)) {
		if(targets == NULL) {
			done = 1;
		} else {
			if(alpm_list_next(i) == NULL) {
				done = 1;
			}
			package = alpm_list_getdata(i);
		}

		/* looking for groups */
		if(config->group) {
			if(targets == NULL) {
				for(j = alpm_db_getgrpcache(db_local); j; j = alpm_list_next(j)) {
					pmgrp_t *grp = alpm_list_getdata(j);
					alpm_list_t *p, *pkgnames;
					const char *grpname;

					grpname = alpm_grp_get_name(grp);
					pkgnames = alpm_grp_get_pkgs(grp);

					for(p = pkgnames; p; p = alpm_list_next(p)) {
						MSG(NL, "%s %s\n", grpname, (char *)alpm_list_getdata(p));
					}
				}
			} else {
				pmgrp_t *grp = alpm_db_readgrp(db_local, package);
				if(grp) {
					alpm_list_t *p, *pkgnames = alpm_grp_get_pkgs(grp);
					for(p = pkgnames; p; p = alpm_list_next(p)) {
						MSG(NL, "%s %s\n", package, (char *)alpm_list_getdata(p));
					}
				} else {
					ERR(NL, _("group \"%s\" was not found\n"), package);
					/* do not return on query operations - let's just carry on */
					/*return(2);*/
				}
			}
			continue;
		}

		/* output info for a .tar.gz package */
		if(config->op_q_isfile) {
			if(package == NULL) {
				ERR(NL, _("no package file was specified for --file\n"));
				return(1);
			}
			if(alpm_pkg_load(package, &info) == -1) {
				ERR(NL, _("failed to load package '%s' (%s)\n"), package, alpm_strerror(pm_errno));
				return(1);
			}
			if(config->op_q_info) {
				dump_pkg_full(info, config->op_q_info);
			}
			if(config->op_q_list) {
				dump_pkg_files(info);
			}
			if(!config->op_q_info && !config->op_q_list) {
				MSG(NL, "%s %s\n", alpm_pkg_get_name(info),
				                   alpm_pkg_get_version(info));
			}
			FREEPKG(info);
			continue;
		}

		/* determine the owner of a file */
		if(config->op_q_owns) {
			query_fileowner(db_local, package);
			continue;
		}

		/* find packages in the db */
		if(package == NULL) {
			/* no target */
			for(i = alpm_db_getpkgcache(db_local); i; i = alpm_list_next(i)) {
				pmpkg_t *tmpp = alpm_list_getdata(i);
				const char *pkgname, *pkgver;

				pkgname = alpm_pkg_get_name(tmpp);
				pkgver = alpm_pkg_get_version(tmpp);

				if(config->op_q_list || config->op_q_orphans || config->op_q_foreign) {
					info = alpm_db_get_pkg(db_local, (char *)pkgname);
					if(info == NULL) {
						/* something weird happened */
						ERR(NL, _("package \"%s\" not found\n"), pkgname);
						continue;
					}
				}
				if(config->op_q_foreign) {
					int match = 0;
					for(j = sync_dbs; j; j = alpm_list_next(j)) {
						pmdb_t *db = (pmdb_t *)alpm_list_getdata(j);
						for(k = alpm_db_getpkgcache(db); k; k = alpm_list_next(k)) {
							pmpkg_t *pkg = alpm_list_getdata(k);
							if(strcmp(alpm_pkg_get_name(pkg), alpm_pkg_get_name(info)) == 0) {
								match = 1;
							}
						}
					}
					if(match==0) {
						MSG(NL, "%s %s\n", pkgname, pkgver);
					}
				} else if(config->op_q_list) {
					dump_pkg_files(info);
				} else if(config->op_q_orphans) {
					if(alpm_pkg_get_requiredby(info) == NULL
						 && (long)alpm_pkg_get_reason(info) == PM_PKG_REASON_DEPEND) {
						MSG(NL, "%s %s\n", pkgname, pkgver);
					}
				} else {
					MSG(NL, "%s %s\n", pkgname, pkgver);
				}
			}
		} else {
			info = alpm_db_get_pkg(db_local, package);
			if(info == NULL) {
				ERR(NL, _("package \"%s\" not found\n"), package);
				continue;
			}

			/* find a target */
			if(config->op_q_info) {
				dump_pkg_full(info, config->op_q_info);
			}
			if(config->op_q_list) {
				dump_pkg_files(info);
			}
			if(!config->op_q_info && !config->op_q_list) {
				MSG(NL, "%s %s\n", alpm_pkg_get_name(info),
				                   alpm_pkg_get_version(info));
			}
			if(config->op_q_changelog) {
				char changelog[PATH_MAX];
				snprintf(changelog, PATH_MAX, "%s%s/%s/%s-%s/changelog",
								 alpm_option_get_root(), alpm_option_get_dbpath(),
								 alpm_db_get_name(db_local),
								 alpm_pkg_get_name(info),
								 alpm_pkg_get_version(info));
				dump_pkg_changelog(changelog, alpm_pkg_get_name(info));
			}
		}
	}

	return(0);
}

/* vim: set ts=2 sw=2 noet: */