/*
 * Copyright (C) 2010-2011 Daiki Ueno <ueno@unixuser.org>
 * Copyright (C) 2010-2011 Red Hat, Inc.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

/**
 * SECTION:eekboard-service
 * @short_description: base implementation of eekboard service
 *
 * Provides a dbus object, and contains the context.
 *
 * The #EekboardService class provides a base server side
 * implementation of eekboard service.
 */

#include "config.h"

#include "sm.puri.OSK0.h"

#include <stdio.h>

#include <gio/gio.h>

#include "eekboard/eekboard-service.h"

enum {
    PROP_0,
    PROP_OBJECT_PATH,
    PROP_CONNECTION,
    PROP_LAST
};

enum {
    DESTROYED,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0, };

typedef struct _EekboardServicePrivate
{
    GDBusConnection *connection;
    SmPuriOSK0 *dbus_interface;
    GDBusNodeInfo *introspection_data;
    guint registration_id;
    char *object_path;

    ServerContextService *context; // unowned reference
} EekboardServicePrivate;

G_DEFINE_TYPE_WITH_PRIVATE (EekboardService, eekboard_service, G_TYPE_OBJECT)

static void
eekboard_service_set_property (GObject      *object,
                               guint         prop_id,
                               const GValue *value,
                               GParamSpec   *pspec)
{
    EekboardService *service = EEKBOARD_SERVICE(object);
    EekboardServicePrivate *priv = eekboard_service_get_instance_private (service);
    GDBusConnection *connection;

    switch (prop_id) {
    case PROP_OBJECT_PATH:
        if (priv->object_path)
            g_free (priv->object_path);
        priv->object_path = g_value_dup_string (value);
        break;
    case PROP_CONNECTION:
        connection = g_value_get_object (value);
        if (priv->connection)
            g_object_unref (priv->connection);
        priv->connection = g_object_ref (connection);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
        break;
    }
}

static void
eekboard_service_get_property (GObject    *object,
                               guint       prop_id,
                               GValue     *value,
                               GParamSpec *pspec)
{
    EekboardService *service = EEKBOARD_SERVICE(object);
    EekboardServicePrivate *priv = eekboard_service_get_instance_private (service);

    switch (prop_id) {
    case PROP_OBJECT_PATH:
        g_value_set_string (value, priv->object_path);
        break;
    case PROP_CONNECTION:
        g_value_set_object (value, priv->connection);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
        break;
    }
}

static void
eekboard_service_dispose (GObject *object)
{
    EekboardService *service = EEKBOARD_SERVICE(object);
    EekboardServicePrivate *priv = eekboard_service_get_instance_private (service);

    if (priv->connection) {
        if (priv->registration_id > 0) {
            g_dbus_connection_unregister_object (priv->connection,
                                                 priv->registration_id);
            priv->registration_id = 0;
        }

        g_object_unref (priv->connection);
        priv->connection = NULL;
    }

    if (priv->introspection_data) {
        g_dbus_node_info_unref (priv->introspection_data);
        priv->introspection_data = NULL;
    }

    if (priv->context) {
        g_signal_handlers_disconnect_by_data (priv->context, service);
        priv->context = NULL;
    }

    G_OBJECT_CLASS (eekboard_service_parent_class)->dispose (object);
}

static void
eekboard_service_finalize (GObject *object)
{
    EekboardService *service = EEKBOARD_SERVICE(object);
    EekboardServicePrivate *priv = eekboard_service_get_instance_private (service);

    g_free (priv->object_path);

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

static gboolean
handle_set_visible(SmPuriOSK0 *object, GDBusMethodInvocation *invocation,
                   gboolean arg_visible, gpointer user_data) {
    EekboardService *service = user_data;
    EekboardServicePrivate *priv = eekboard_service_get_instance_private (service);

    if (priv->context) {
        if (arg_visible) {
            server_context_service_show_keyboard (priv->context);
        } else {
            server_context_service_hide_keyboard (priv->context);
        }
    }
    sm_puri_osk0_complete_set_visible(object, invocation);
    return TRUE;
}

static void on_visible(EekboardService *service,
                       GParamSpec *pspec,
                       ServerContextService *context)
{
    gboolean visible;
    EekboardServicePrivate *priv;

    g_return_if_fail (EEKBOARD_IS_SERVICE (service));
    g_return_if_fail (SERVER_IS_CONTEXT_SERVICE (context));

    priv = eekboard_service_get_instance_private (service);
    g_object_get (context, "visible", &visible, NULL);

    sm_puri_osk0_set_visible(priv->dbus_interface, visible);
}

static void
eekboard_service_constructed (GObject *object)
{
    EekboardService *service = EEKBOARD_SERVICE(object);
    EekboardServicePrivate *priv = eekboard_service_get_instance_private (service);

    priv->dbus_interface = sm_puri_osk0_skeleton_new();
    g_signal_connect(priv->dbus_interface, "handle-set-visible",
                     G_CALLBACK(handle_set_visible), service);

    if (priv->connection && priv->object_path) {
        GError *error = NULL;

        if (!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(priv->dbus_interface),
                                              priv->connection,
                                              priv->object_path,
                                              &error)) {
            g_warning("Error registering dbus object: %s\n", error->message);
            g_clear_error(&error);
        }
    }
}

static void
eekboard_service_class_init (EekboardServiceClass *klass)
{
    GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
    GParamSpec *pspec;

    klass->create_context = NULL;

    gobject_class->constructed = eekboard_service_constructed;
    gobject_class->set_property = eekboard_service_set_property;
    gobject_class->get_property = eekboard_service_get_property;
    gobject_class->dispose = eekboard_service_dispose;
    gobject_class->finalize = eekboard_service_finalize;

    /**
     * EekboardService::destroyed:
     * @service: an #EekboardService
     *
     * The ::destroyed signal is emitted when the service is vanished.
     */
    signals[DESTROYED] =
        g_signal_new (I_("destroyed"),
                      G_TYPE_FROM_CLASS(gobject_class),
                      G_SIGNAL_RUN_LAST,
                      0,
                      NULL,
                      NULL,
                      g_cclosure_marshal_VOID__VOID,
                      G_TYPE_NONE,
                      0);

    /**
     * EekboardService:object-path:
     *
     * D-Bus object path.
     */
    pspec = g_param_spec_string ("object-path",
                                 "Object-path",
                                 "Object-path",
                                 NULL,
                                 G_PARAM_CONSTRUCT | G_PARAM_READWRITE);
    g_object_class_install_property (gobject_class,
                                     PROP_OBJECT_PATH,
                                     pspec);

    /**
     * EekboardService:connection:
     *
     * D-Bus connection.
     */
    pspec = g_param_spec_object ("connection",
                                 "Connection",
                                 "Connection",
                                 G_TYPE_DBUS_CONNECTION,
                                 G_PARAM_CONSTRUCT | G_PARAM_READWRITE);
    g_object_class_install_property (gobject_class,
                                     PROP_CONNECTION,
                                     pspec);
}

static void
eekboard_service_init (EekboardService *self)
{
    EekboardServicePrivate *priv = eekboard_service_get_instance_private (self);

    priv->context = NULL;
}

/**
 * eekboard_service_new:
 * @connection: a #GDBusConnection
 * @object_path: object path
 */
EekboardService *
eekboard_service_new (GDBusConnection *connection,
                      const gchar     *object_path)
{
    return g_object_new (EEKBOARD_TYPE_SERVICE,
                         "object-path", object_path,
                         "connection", connection,
                         NULL);
}

void
eekboard_service_set_context(EekboardService *service,
                             ServerContextService *context)
{
    EekboardServicePrivate *priv = eekboard_service_get_instance_private (service);

    g_return_if_fail (!priv->context);

    priv->context = context;

    g_signal_connect_swapped (priv->context,
                              "notify::visible",
                              G_CALLBACK(on_visible),
                              service);
}