/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2007 Collabora Ltd.
 *
 * 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.
 * 
 * Authors: Xavier Claessens <xclaesse@gmail.com>
 */

#include <config.h>

#include <libmissioncontrol/mission-control.h>

#include "empathy-tp-chatroom.h"
#include "empathy-tp-contact-list.h"
#include "empathy-contact-list.h"
#include "empathy-contact-manager.h"
#include "gossip-telepathy-group.h"
#include "gossip-utils.h"
#include "gossip-debug.h"

#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
		       EMPATHY_TYPE_TP_CHATROOM, EmpathyTpChatroomPriv))

#define DEBUG_DOMAIN "TpChatroom"

struct _EmpathyTpChatroomPriv {
	EmpathyContactManager *manager;
	EmpathyTpContactList  *list;
	GossipTelepathyGroup  *group;

	gboolean               is_invited;
	GossipContact         *invitor;
	gchar                 *invit_message;
};

static void            empathy_tp_chatroom_class_init (EmpathyTpChatroomClass  *klass);
static void            tp_chatroom_iface_init         (EmpathyContactListIface *iface);
static void            empathy_tp_chatroom_init       (EmpathyTpChatroom       *chatroom);
static void            tp_chatroom_finalize           (GObject                 *object);
static void            tp_chatroom_members_added_cb   (GossipTelepathyGroup    *group,
						       GArray                  *handles,
						       guint                    actor_handle,
						       guint                    reason,
						       const gchar             *message,
						       EmpathyTpChatroom       *list);
static void            tp_chatroom_members_removed_cb (GossipTelepathyGroup    *group,
						       GArray                  *handles,
						       guint                    actor_handle,
						       guint                    reason,
						       const gchar             *message,
						       EmpathyTpChatroom       *list);
static void            tp_chatroom_setup              (EmpathyContactList      *list);
static GossipContact * tp_chatroom_find               (EmpathyContactList      *list,
						       const gchar             *id);
static void            tp_chatroom_add                (EmpathyContactList      *list,
						       GossipContact           *contact,
						       const gchar             *message);
static void            tp_chatroom_remove             (EmpathyContactList      *list,
						       GossipContact           *contact,
						       const gchar             *message);
static GList *         tp_chatroom_get_contacts       (EmpathyContactList      *list);

G_DEFINE_TYPE_WITH_CODE (EmpathyTpChatroom, empathy_tp_chatroom, EMPATHY_TYPE_TP_CHAT,
			 G_IMPLEMENT_INTERFACE (EMPATHY_TYPE_CONTACT_LIST,
						tp_chatroom_iface_init));

static void
empathy_tp_chatroom_class_init (EmpathyTpChatroomClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);

	object_class->finalize = tp_chatroom_finalize;

	g_type_class_add_private (object_class, sizeof (EmpathyTpChatroomPriv));
}

static void
tp_chatroom_iface_init (EmpathyContactListIface *iface)
{
	iface->setup = tp_chatroom_setup;
	iface->find = tp_chatroom_find;
	iface->add = tp_chatroom_add;
	iface->remove = tp_chatroom_remove;
	iface->get_contacts = tp_chatroom_get_contacts;
}

static void
empathy_tp_chatroom_init (EmpathyTpChatroom *chatroom)
{
}

static void
tp_chatroom_finalize (GObject *object)
{
	EmpathyTpChatroomPriv *priv;
	EmpathyTpChatroom     *chatroom;

	chatroom = EMPATHY_TP_CHATROOM (object);
	priv = GET_PRIV (chatroom);

	g_object_unref (priv->group);
	g_object_unref (priv->manager);

	if (priv->invitor) {
		g_object_unref (priv->invitor);
	}

	g_free (priv->invit_message);

	G_OBJECT_CLASS (empathy_tp_chatroom_parent_class)->finalize (object);
}

EmpathyTpChatroom *
empathy_tp_chatroom_new (McAccount *account,
			 TpChan    *tp_chan)
{
	EmpathyTpChatroomPriv *priv;
	EmpathyTpChatroom     *chatroom;
	TpConn                *tp_conn;
	MissionControl        *mc;
	GList                 *members, *l;
	guint                  self_handle;

	g_return_val_if_fail (MC_IS_ACCOUNT (account), NULL);
	g_return_val_if_fail (TELEPATHY_IS_CHAN (tp_chan), NULL);

	chatroom = g_object_new (EMPATHY_TYPE_TP_CHATROOM,
				 "account", account,
				 "tp-chan", tp_chan,
				 NULL);

	priv = GET_PRIV (chatroom);

	mc = gossip_mission_control_new ();
	tp_conn = mission_control_get_connection (mc, account, NULL);
	priv->manager = empathy_contact_manager_new ();
	priv->list = empathy_contact_manager_get_list (priv->manager, account);
	priv->group = gossip_telepathy_group_new (tp_chan, tp_conn);

	g_signal_connect (priv->group, "members-added",
			  G_CALLBACK (tp_chatroom_members_added_cb),
			  chatroom);
	g_signal_connect (priv->group, "members-removed",
			  G_CALLBACK (tp_chatroom_members_removed_cb),
			  chatroom);

	/* Check if we are invited to join the chat */
	self_handle = gossip_telepathy_group_get_self_handle (priv->group);
	members = gossip_telepathy_group_get_local_pending_members_with_info (priv->group);
	for (l = members; l; l = l->next) {
		GossipTpGroupInfo *info;

		info = l->data;

		if (info->member != self_handle) {
			continue;
		}

		priv->invitor = empathy_tp_contact_list_get_from_handle (priv->list,
									 info->actor);
		priv->invit_message = g_strdup (info->message);
		priv->is_invited = TRUE;

		gossip_debug (DEBUG_DOMAIN, "We are invited to join by %s: %s",
			      gossip_contact_get_name (priv->invitor),
			      priv->invit_message);
	}

	gossip_telepathy_group_info_list_free (members);
	g_object_unref (mc);
	g_object_unref (tp_conn);

	return chatroom;
}

gboolean
empathy_tp_chatroom_get_invitation (EmpathyTpChatroom  *chatroom,
				    GossipContact     **contact,
				    const gchar       **message)
{
	EmpathyTpChatroomPriv *priv;

	g_return_val_if_fail (EMPATHY_IS_TP_CHATROOM (chatroom), FALSE);

	priv = GET_PRIV (chatroom);

	if (*contact) {
		*contact = priv->invitor;
	}
	if (*message) {
		*message = priv->invit_message;
	}

	return priv->is_invited;
}

void
empathy_tp_chatroom_accept_invitation (EmpathyTpChatroom *chatroom)
{
	EmpathyTpChatroomPriv *priv;
	guint                  self_handle;

	g_return_if_fail (EMPATHY_IS_TP_CHATROOM (chatroom));

	priv = GET_PRIV (chatroom);

	/* Clear invitation data */
	priv->is_invited = FALSE;
	if (priv->invitor) {
		g_object_unref (priv->invitor);
		priv->invitor = NULL;
	}
	g_free (priv->invit_message);
	priv->invit_message = NULL;

	/* Add ourself in the members of the room */
	self_handle = gossip_telepathy_group_get_self_handle (priv->group);
	gossip_telepathy_group_add_member (priv->group, self_handle,
					   "Just for fun");
}

void
empathy_tp_chatroom_set_topic (EmpathyTpChatroom *chatroom,
			       const gchar       *topic)
{
}

static void
tp_chatroom_members_added_cb (GossipTelepathyGroup *group,
			      GArray               *handles,
			      guint                 actor_handle,
			      guint                 reason,
			      const gchar          *message,
			      EmpathyTpChatroom    *chatroom)
{
	EmpathyTpChatroomPriv *priv;
	GList                 *contacts, *l;

	g_return_if_fail (EMPATHY_IS_TP_CHATROOM (chatroom));

	priv = GET_PRIV (chatroom);

	contacts = empathy_tp_contact_list_get_from_handles (priv->list, handles);
	for (l = contacts; l; l = l->next) {
		GossipContact *contact;

		contact = l->data;

		g_signal_emit_by_name (chatroom, "contact-added", contact);

		g_object_unref (contact);
	}
	g_list_free (contacts);
}

static void
tp_chatroom_members_removed_cb (GossipTelepathyGroup *group,
				GArray               *handles,
				guint                 actor_handle,
				guint                 reason,
				const gchar          *message,
				EmpathyTpChatroom    *chatroom)
{
}

static void
tp_chatroom_setup (EmpathyContactList *list)
{
	/* Nothing to do */
}

static GossipContact *
tp_chatroom_find (EmpathyContactList *list,
		  const gchar        *id)
{
	return NULL;
}

static void
tp_chatroom_add (EmpathyContactList *list,
		 GossipContact      *contact,
		 const gchar        *message)
{
}

static void
tp_chatroom_remove (EmpathyContactList *list,
		    GossipContact      *contact,
		    const gchar        *message)
{
}

static GList *
tp_chatroom_get_contacts (EmpathyContactList *list)
{
	EmpathyTpChatroomPriv *priv;
	GArray                *members;
	GList                 *contacts;

	g_return_val_if_fail (EMPATHY_IS_TP_CHATROOM (list), NULL);

	priv = GET_PRIV (list);

	members = gossip_telepathy_group_get_members (priv->group);
	contacts = empathy_tp_contact_list_get_from_handles (priv->list, members);
	g_array_free (members, TRUE);

	return contacts;
}