/*

  * Copyright (C) 2010  J. Ali Harlow <ali@juiblex.co.uk>

  *

  * 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.,

  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

  */

 #include "config.h"

 #include <stdlib.h>

 #include <string.h>

 #include <fcntl.h>

 #include <errno.h>

 #include <glib-object.h>

 #include <razor.h>

 #include "plover/plover.h"

 #include "plover-gtk/error.h"

 #include "plover-gtk/packageset.h"

 #include "plover-gtk/package.h"

 G_DEFINE_TYPE(PloverPackageSet,plover_package_set,G_TYPE_OBJECT);

 typedef struct _PloverPackageSetPrivate {

     struct razor_root *root;

     struct razor_set *set;

     GSList *packages;

     int no_details;

 } PloverPackageSetPrivate;

 #define PLOVER_PACKAGE_SET_GET_PRIVATE(obj)\

 				G_TYPE_INSTANCE_GET_PRIVATE(obj,\

 				  PLOVER_TYPE_PACKAGE_SET,\

 				  PloverPackageSetPrivate)

 enum {

     CHANGED=0,

     N_SIGNALS

 };

 static guint signals[N_SIGNALS];

 static void plover_package_set_finalize(GObject *obj)

 {

     PloverPackageSetPrivate *priv=PLOVER_PACKAGE_SET_GET_PRIVATE(obj);

     if (priv->root)

     {

 	/* priv->set, if set, is owned by priv->root and should not

 	 * be destroyed.

 	 */

 	razor_root_close(priv->root);

     }

     else if (priv->set)

 	razor_set_destroy(priv->set);

     if (G_OBJECT_CLASS(plover_package_set_parent_class)->finalize)

 	G_OBJECT_CLASS(plover_package_set_parent_class)->finalize(obj);

 }

 static void plover_package_set_dispose(GObject *obj)

 {

     PloverPackageSetPrivate *priv=PLOVER_PACKAGE_SET_GET_PRIVATE(obj);

     if (G_OBJECT_CLASS(plover_package_set_parent_class)->dispose)

 	G_OBJECT_CLASS(plover_package_set_parent_class)->dispose(obj);

 }

 static void plover_package_set_class_init(PloverPackageSetClass *klass)

 {

     GObjectClass *oclass=G_OBJECT_CLASS(klass);

     oclass->finalize=plover_package_set_finalize;

     oclass->dispose=plover_package_set_dispose;

     g_type_class_add_private(klass,sizeof(PloverPackageSetPrivate));

     signals[CHANGED]=g_signal_newv("changed",

       G_TYPE_FROM_CLASS(klass),G_SIGNAL_RUN_LAST,NULL,NULL,NULL,

       g_cclosure_marshal_VOID__VOID,G_TYPE_NONE,0,NULL);

 }

 static void plover_package_set_init(PloverPackageSet *set)

 {

     PloverPackageSetPrivate *priv;

     priv=PLOVER_PACKAGE_SET_GET_PRIVATE(set);

     priv->no_details=-1;

 }

 PloverPackageSet *plover_package_set_new(void)

 {

     return g_object_new(PLOVER_TYPE_PACKAGE_SET,NULL);

 }

 PloverPackageSet *plover_package_set_new_from_installed(const char *root,

   GError **err)

 {

     PloverPackageSet *set;

     PloverPackageSetPrivate *priv;

     set=plover_package_set_new();

     priv=PLOVER_PACKAGE_SET_GET_PRIVATE(set);

     priv->root=razor_root_open(root);

     if (!priv->root)

     {

 	g_set_error(err,PLOVER_RAZOR_ERROR,PLOVER_RAZOR_ERROR_FAILED,

 	  "Failed to open %s as razor root",root);

 	g_object_unref(set);

 	return NULL;

     }

     priv->set=razor_root_get_system_set(priv->root);

     if (!priv->set)

     {

 	g_set_error(err,PLOVER_RAZOR_ERROR,PLOVER_RAZOR_ERROR_FAILED,

 	  "Failed to get system set from %s",root);

 	g_object_unref(set);

 	return NULL;

     }

     return set;

 }

 PloverPackageSet *plover_package_set_new_from_repository(const char *base,

   struct razor_relocations *relocations,GError **err)

 {

 #if HAVE_FCHDIR

     int fd;

 #else

     size_t wd_len;

     char *wd;

 #endif

     gchar *s;

     struct razor_set *reloc;

     PloverPackageSet *set;

     PloverPackageSetPrivate *priv;

     set=plover_package_set_new();

     priv=PLOVER_PACKAGE_SET_GET_PRIVATE(set);

 #if HAVE_FCHDIR

     fd=open(".",O_RDONLY);

 #else

     wd_len=32;

     wd=malloc(wd_len);

     while (!getcwd(wd,wd_len) && errno==ERANGE)

     {

 	free(wd);

 	wd_len*=2;

 	wd=malloc(wd_len);

     }

 #endif

     s=g_build_filename(base,"repodata",NULL);

     if (chdir(s)<0)

     {

 	g_set_error(err,G_FILE_ERROR,g_file_error_from_errno(errno),

 	  "%s: %s",s,g_strerror(errno));

 	g_object_unref(set);

 #if HAVE_FCHDIR

 	close(fd);

 #else

 	free(wd);

 #endif

 	return NULL;

     }

     g_free(s);

     priv->set=plover_razor_set_create_from_yum("..");

 #if HAVE_FCHDIR

     fchdir(fd);

     close(fd);

 #else

     chdir(wd);

     free(wd);

 #endif

     if (priv->set && relocations)

     {

 	reloc=plover_relocate_packages(priv->set,base,relocations);

 	razor_set_destroy(priv->set);

 	priv->set=reloc;

     }

     if (!priv->set)

     {

 	g_set_error(err,PLOVER_RAZOR_ERROR,PLOVER_RAZOR_ERROR_FAILED,

 	  "Failed to create package set from repository %s",base);

 	g_object_unref(set);

 	return NULL;

     }

     return set;

 }

 GSList *plover_package_set_get_packages(PloverPackageSet *set)

 {

     struct razor_package_iterator *iter;

     struct razor_package *pkg;

     PloverPackageSetPrivate *priv;

     PloverPackage *package;

     g_return_val_if_fail(PLOVER_IS_PACKAGE_SET(set),NULL);

     priv=PLOVER_PACKAGE_SET_GET_PRIVATE(set);

     if (priv->set && !priv->packages)

     {

 	iter=razor_package_iterator_create(priv->set);

 	while(razor_package_iterator_next(iter,&pkg,RAZOR_DETAIL_LAST))

 	{

 	    package=plover_package_new(priv->set,pkg);

 	    priv->packages=g_slist_prepend(priv->packages,package);

 	}

 	razor_package_iterator_destroy(iter);

     }

     return priv->packages;

 }

 /*

  * Some versions of razor have a bug which causes all detail strings

  * to be discarded. If such a version of razor is used to install or

  * update a package, then all the detail strings for the installed

  * set will be lost. This function tests for this condition and can

  * be used to present something more useful than blank details.

  */

 gboolean plover_package_set_get_no_details(PloverPackageSet *set)

 {

     PloverPackageSetPrivate *priv;

     PloverPackage *package;

     GSList *packages,*link;

     g_return_val_if_fail(PLOVER_IS_PACKAGE_SET(set),FALSE);

     priv=PLOVER_PACKAGE_SET_GET_PRIVATE(set);

     if (priv->no_details<0)

     {

 	packages=plover_package_set_get_packages(set);

 	if (packages)

 	{

 	    priv->no_details=0;

 	    for(link=packages;link;link=link->next)

 	    {

 		package=link->data;

 		priv->no_details+=2;

 		if (*plover_package_get_summary(package))

 		    priv->no_details--;

 		if (*plover_package_get_license(package))

 		    priv->no_details--;

 		if (*plover_package_get_description(package))

 		    priv->no_details--;

 		if (*plover_package_get_URL(package))

 		    priv->no_details--;

 	    }

 	    if (priv->no_details<0)	/* More than 50% of strings present */

 		priv->no_details=0;

 	}

     }

     return priv->no_details>0;

 }