/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>  
 *
 *
 * Authors:
 *		Vivek Jain <jvivek@novell.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>
#include <stdlib.h>
#include <glib.h>
#include "em-junk-hook.h"
#include "mail-session.h"
#include "e-util/e-error.h"
#include "em-utils.h"
#include <camel/camel-junk-plugin.h>
#include <glib/gi18n.h>

static GHashTable *emjh_types;
static GObjectClass *parent_class = NULL;

static void *emjh_parent_class;
static GObjectClass *emj_parent;
#define emjh ((EMJunkHook *)eph)

#define d(x)

static const EPluginHookTargetKey emjh_flag_map[] = {
	{ NULL }
};

/* ********************************************************************** */

/* Mail junk plugin */

/*
  <hook class="org.gnome.evolution.mail.junk:1.0">
  <group id="EMJunk">
     <item check_junk="sa_check_junk"
     	   report_junk="sa_report_junk"
	   report_non_junk="sa_report_non_junk"
	   commit_reports = "sa_commit_reports"/>
  </group>
  </hook>

*/

static void manage_error (const char *msg, GError *error);

GQuark
em_junk_error_quark (void)
{
	return g_quark_from_static_string ("em-junk-error-quark");
}

static const char *
em_junk_get_name (CamelJunkPlugin *csp);

static void
em_junk_init(CamelJunkPlugin *csp)
{
	struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

	((EPluginClass *)G_OBJECT_GET_CLASS(item->hook->hook.plugin))->enable(item->hook->hook.plugin, 1);
}

static const char *
em_junk_get_name (CamelJunkPlugin *csp)
{
	struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

	if (item->hook && item->hook->hook.plugin->enabled) {
		return (item->hook->hook.plugin->name);
	} else
		return 	_("None");

}

static gboolean
em_junk_check_junk(CamelJunkPlugin *csp, CamelMimeMessage *m)
{
	struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

	if (item->hook && item->hook->hook.plugin->enabled) {
		gboolean res;
		EMJunkHookTarget target = {
			m,
			NULL
		};

		res = e_plugin_invoke(item->hook->hook.plugin, item->check_junk, &target) != NULL;

		manage_error ("mail:junk-check-error", target.error);

		return res;
	}

	return FALSE;
}

static void
em_junk_report_junk(CamelJunkPlugin *csp, CamelMimeMessage *m)
{
	struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

	if (item->hook && item->hook->hook.plugin->enabled) {
		EMJunkHookTarget target = {
			m,
			NULL
		};

		e_plugin_invoke(item->hook->hook.plugin, item->report_junk, &target);

		manage_error ("mail:junk-report-error", target.error);
	}
}

static void
em_junk_report_non_junk(CamelJunkPlugin *csp, CamelMimeMessage *m)
{
	struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

	if (item->hook && item->hook->hook.plugin->enabled) {
		EMJunkHookTarget target = {
			m,
			NULL
		};
		e_plugin_invoke(item->hook->hook.plugin, item->report_non_junk, &target);
		manage_error ("mail:junk-not-report-error", target.error);
	}
}

static void
em_junk_commit_reports(CamelJunkPlugin *csp)
{
	struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

	if (item->hook && item->hook->hook.plugin->enabled)
		e_plugin_invoke(item->hook->hook.plugin, item->commit_reports, NULL);

}

static void
emj_dispose (GObject *object)
{
	if (parent_class->dispose)
		parent_class->dispose (object);
}

static void
emj_finalize (GObject *object)
{
	if (parent_class->finalize)
		parent_class->finalize (object);
}

static void
emjh_free_item(EMJunkHookItem *item)
{
	g_free (item->check_junk);
	g_free (item->report_junk);
	g_free (item->report_non_junk);
	g_free (item->commit_reports);
	g_free(item);
}

static void
emjh_free_group(EMJunkHookGroup *group)
{
	g_slist_foreach(group->items, (GFunc)emjh_free_item, NULL);
	g_slist_free(group->items);

	g_free(group->id);
	g_free(group);
}

static struct _EMJunkHookItem *
emjh_construct_item(EPluginHook *eph, EMJunkHookGroup *group, xmlNodePtr root)
{
	struct _EMJunkHookItem *item;
	CamelJunkPlugin junk_plugin = {
		em_junk_get_name,
		1,
		em_junk_check_junk,
		em_junk_report_junk,
		em_junk_report_non_junk,
		em_junk_commit_reports,
		em_junk_init,
	};

	d(printf("  loading group item\n"));
	item = g_malloc0(sizeof(*item));
	item->csp =  junk_plugin;
	item->check_junk = e_plugin_xml_prop(root, "check_junk");
	item->report_junk = e_plugin_xml_prop(root, "report_junk");
	item->report_non_junk = e_plugin_xml_prop(root, "report_non_junk");
	item->commit_reports = e_plugin_xml_prop(root, "commit_reports");
	item->validate_binary = e_plugin_xml_prop(root, "validate_binary");

	item->plugin_name = e_plugin_xml_prop(root, "name");
	item->hook = emjh;

	if (item->check_junk == NULL || item->report_junk == NULL || item->report_non_junk == NULL || item->commit_reports == NULL)
		goto error;

	/* Add the plugin to the session plugin list*/
	mail_session_add_junk_plugin (item->plugin_name, CAMEL_JUNK_PLUGIN (&(item->csp)));

	return item;
error:
	printf ("ERROR");
	emjh_free_item (item);
	return NULL;
}

static struct _EMJunkHookGroup *
emjh_construct_group(EPluginHook *eph, xmlNodePtr root)
{
	struct _EMJunkHookGroup *group;
	xmlNodePtr node;

	d(printf(" loading group\n"));
	group = g_malloc0(sizeof(*group));

	group->id = e_plugin_xml_prop(root, "id");
	if (group->id == NULL)
		goto error;

	node = root->children;

	/* We'll processs only  the first item from xml file*/
	while (node) {
		if (0 == strcmp((char *)node->name, "item")) {
			struct _EMJunkHookItem *item;

			item = emjh_construct_item(eph, group, node);
			if (item)
				group->items = g_slist_append(group->items, item);
			break;
		}

		node = node->next;
	}

	return group;
error:
	emjh_free_group(group);

	return NULL;
}

static int
emjh_construct(EPluginHook *eph, EPlugin *ep, xmlNodePtr root)
{
	xmlNodePtr node;

	d(printf("loading junk hook\n"));

	if (((EPluginHookClass *)emjh_parent_class)->construct(eph, ep, root) == -1)
		return -1;

	if (!ep->enabled) {
		g_warning ("ignored this junk plugin: not enabled");
		return -1;
	}

	node = root->children;
	while (node) {
		if (strcmp((char *)node->name, "group") == 0) {
			struct _EMJunkHookGroup *group;

			group = emjh_construct_group(eph, node);
			if (group) {
				emjh->groups = g_slist_append(emjh->groups, group);
			}
		}
		node = node->next;
	}

	eph->plugin = ep;

	return 0;
}

struct manage_error_idle_data
{
	const char *msg;
	GError *error;
};

static void
free_mei (gpointer data)
{
	struct manage_error_idle_data *mei = (struct manage_error_idle_data*) data;

	if (!mei)
		return;

	g_error_free (mei->error);
	g_free (mei);
}

static gboolean
manage_error_idle (gpointer data)
{
	GtkWidget *w;
	struct manage_error_idle_data *mei = (struct manage_error_idle_data *) data;

	if (!mei)
		return FALSE;

	w = e_error_new (NULL, mei->msg, mei->error->message, NULL);
	em_utils_show_error_silent (w);

	return FALSE;
}

static void
manage_error (const char *msg, GError *error)
{
	struct manage_error_idle_data *mei;

	if (!error)
		return;

	mei = g_new0 (struct manage_error_idle_data, 1);
	mei->msg = msg; /* it's a static string, should be safe to use it as this */
	mei->error = error;

	g_idle_add_full (G_PRIORITY_DEFAULT_IDLE, manage_error_idle, mei, free_mei);
}

/*XXX: don't think we need here*/
static void
emjh_enable(EPluginHook *eph, int state)
{
	GSList *g;

	g = emjh->groups;
	if (emjh_types == NULL)
		return;

}

static void
emjh_finalise(GObject *o)
{
	EPluginHook *eph = (EPluginHook *)o;

	g_slist_foreach(emjh->groups, (GFunc)emjh_free_group, NULL);
	g_slist_free(emjh->groups);

	((GObjectClass *)emjh_parent_class)->finalize(o);
}

static void
emjh_class_init(EPluginHookClass *klass)
{
	((GObjectClass *)klass)->finalize = emjh_finalise;
	klass->construct = emjh_construct;
	klass->enable = emjh_enable;
	klass->id = "org.gnome.evolution.mail.junk:1.0";
}

GType
em_junk_hook_get_type(void)
{
	static GType type = 0;

	if (!type) {
		static const GTypeInfo info = {
			sizeof(EMJunkHookClass), NULL, NULL, (GClassInitFunc) emjh_class_init, NULL, NULL,
			sizeof(EMJunkHook), 0, (GInstanceInitFunc) NULL,
		};

		emjh_parent_class = g_type_class_ref(e_plugin_hook_get_type());
		type = g_type_register_static(e_plugin_hook_get_type(), "EMJunkHook", &info, 0);
	}

	return type;
}

static void
emj_class_init (EMJunkClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);
	parent_class = g_type_class_peek_parent (klass);
	object_class->dispose = emj_dispose;
	object_class->finalize = emj_finalize;
}

GType
emj_get_type(void)
{
	static GType type = 0;

	if (!type) {
		static const GTypeInfo info = {
			sizeof(EMJunkClass), NULL, NULL, (GClassInitFunc) emj_class_init, NULL, NULL,
			sizeof(EMJunk), 0, (GInstanceInitFunc) NULL,
		};

		emj_parent = g_type_class_ref(G_TYPE_OBJECT);
		type = g_type_register_static(G_TYPE_OBJECT, "EMJunk", &info, 0);
	}

	return type;
}

void
em_junk_hook_register_type(GType type)
{
	EMJunk *klass;

	if (emjh_types == NULL)
		emjh_types = g_hash_table_new(g_str_hash, g_str_equal);

	d(printf("registering junk plugin type '%s'\n", g_type_name(type)));

	klass = g_type_class_ref(type);
	g_hash_table_insert(emjh_types, (void *)g_type_name(type), klass);
}