/*
 *
 * 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:
 *		Rodrigo Moya <rodrigo@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include <string.h>
#include <glib/gi18n.h>
#include <libedataserver/e-source.h>
#include <libedataserverui/e-passwords.h>
#include "authentication.h"
#include <libedataserver/e-url.h>

static GHashTable *source_lists_hash = NULL;

static char *
auth_func_cb (ECal *ecal, const char *prompt, const char *key, gpointer user_data)
{
	gboolean remember;
	char *password, *auth_domain;
	ESource *source;
	const gchar *component_name;

	source = e_cal_get_source (ecal);
	auth_domain = e_source_get_duped_property (source, "auth-domain");
	component_name = auth_domain ? auth_domain : "Calendar";
	password = e_passwords_get_password (component_name, key);

	if (!password)
		password = e_passwords_ask_password (_("Enter password"), component_name, key, prompt,
						     E_PASSWORDS_REMEMBER_FOREVER|E_PASSWORDS_SECRET|E_PASSWORDS_ONLINE,
						     &remember,
						     NULL);
	g_free (auth_domain);
	return password;
}

static char *
build_pass_key (ECal *ecal)
{
	char *euri_str;
	const char *uri;
	EUri *euri;

	uri = e_cal_get_uri (ecal);

	euri = e_uri_new (uri);
	euri_str = e_uri_to_string (euri, FALSE);

	e_uri_free (euri);
	return euri_str;
}

void 
auth_cal_forget_password (ECal *ecal)
{
	ESource *source = NULL;
	const char *auth_domain = NULL, *component_name = NULL,  *auth_type = NULL;
	char *key = NULL;

	source = e_cal_get_source (ecal);
	auth_domain = e_source_get_property (source, "auth-domain");
	component_name = auth_domain ? auth_domain : "Calendar";

	auth_type = e_source_get_property (source, "auth-type");
	if (auth_type)
		key = build_pass_key (ecal);
	else
		key = e_source_get_uri (source);

	e_passwords_forget_password (component_name, key);

	g_free (key);
}

ECal *
auth_new_cal_from_default (ECalSourceType type)
{
	ECal *ecal = NULL;

	if (!e_cal_open_default (&ecal, type, auth_func_cb, NULL, NULL))
		return NULL;


	return ecal;
}

ECal *
auth_new_cal_from_source (ESource *source, ECalSourceType type)
{
	ECal *cal;

	cal = e_cal_new (source, type);
	if (cal)
		e_cal_set_auth_func (cal, (ECalAuthFunc) auth_func_cb, NULL);

	return cal;
}

ECal *
auth_new_cal_from_uri (const char *uri, ECalSourceType type)
{
	ESourceGroup *group = NULL;
	ESource *source = NULL;
	ECal *cal;
	ESourceList *source_list = NULL;

	/* try to find the source in the source list in GConf */
	source_list = g_hash_table_lookup (source_lists_hash, &type);
	if (!source_list) {
		if (e_cal_get_sources (&source_list, type, NULL)) {
			if (!source_lists_hash)
				source_lists_hash = g_hash_table_new (g_int_hash, g_int_equal);

			g_hash_table_insert (source_lists_hash, &type, source_list);
		}
	}

	if (source_list) {
		GSList *gl;

		for (gl = e_source_list_peek_groups (source_list); gl != NULL && source == NULL; gl = gl->next) {
			GSList *sl;

			for (sl = e_source_group_peek_sources (gl->data); sl != NULL; sl = sl->next) {
				char *source_uri;

				source_uri = e_source_get_uri (sl->data);
				if (source_uri) {
					if (!strcmp (source_uri, uri)) {
						g_free (source_uri);
						source = g_object_ref (sl->data);
						break;
					}

					g_free (source_uri);
				}
			}
		}
	}

	if (!source) {
		group = e_source_group_new ("", uri);
		source = e_source_new ("", "");
		e_source_set_group (source, group);

		/* we explicitly check for groupwise:// uris, to force authentication on them */
		if (!strncmp (uri, "groupwise://", strlen ("groupwise://"))) {
			e_source_set_property (source, "auth", "1");
			e_source_set_property (source, "auth-domain", "Groupwise");
			/* FIXME: need to retrieve the username */
		}
	}

	cal = auth_new_cal_from_source (source, type);

	g_object_unref (source);
	if (group)
		g_object_unref (group);

	return cal;
}