/*
 * Virt Viewer: A virtual machine console viewer
 *
 * Copyright (C) 2007-2012 Red Hat, Inc.
 * Copyright (C) 2009-2012 Daniel P. Berrange
 * Copyright (C) 2010 Marc-André Lureau
 *
 * 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
 *
 * Author: Daniel P. Berrange <berrange@redhat.com>
 */

#include <config.h>

#include <spice-audio.h>
#include <glib/gi18n.h>

#include <spice-option.h>
#include <usb-device-widget.h>
#include "virt-viewer-util.h"
#include "virt-viewer-session-spice.h"
#include "virt-viewer-display-spice.h"
#include "virt-viewer-auth.h"

G_DEFINE_TYPE (VirtViewerSessionSpice, virt_viewer_session_spice, VIRT_VIEWER_TYPE_SESSION)


struct _VirtViewerSessionSpicePrivate {
    SpiceSession *session;
    SpiceGtkSession *gtk_session;
    SpiceAudio *audio;
};

#define VIRT_VIEWER_SESSION_SPICE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE((o), VIRT_VIEWER_TYPE_SESSION_SPICE, VirtViewerSessionSpicePrivate))

enum {
    PROP_0,
    PROP_SPICE_SESSION,
};


static void virt_viewer_session_spice_close(VirtViewerSession *session);
static gboolean virt_viewer_session_spice_open_fd(VirtViewerSession *session, int fd);
static gboolean virt_viewer_session_spice_open_host(VirtViewerSession *session, char *host, char *port);
static gboolean virt_viewer_session_spice_open_uri(VirtViewerSession *session, char *uri);
static gboolean virt_viewer_session_spice_channel_open_fd(VirtViewerSession *session, VirtViewerSessionChannel *channel, int fd);
static gboolean virt_viewer_session_spice_has_usb(VirtViewerSession *session);
static void virt_viewer_session_spice_usb_device_selection(VirtViewerSession *session, GtkWindow *parent);
static void virt_viewer_session_spice_channel_new(SpiceSession *s,
                                                  SpiceChannel *channel,
                                                  VirtViewerSession *session);
static void virt_viewer_session_spice_channel_destroy(SpiceSession *s,
                                                      SpiceChannel *channel,
                                                      VirtViewerSession *session);


static void
virt_viewer_session_spice_get_property(GObject *object, guint property_id,
                                       GValue *value, GParamSpec *pspec)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(object);
    VirtViewerSessionSpicePrivate *priv = self->priv;

    switch (property_id) {
    case PROP_SPICE_SESSION:
        g_value_set_object(value, priv->session);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
    }
}

static void
virt_viewer_session_spice_set_property(GObject *object, guint property_id,
                                       const GValue *value G_GNUC_UNUSED, GParamSpec *pspec)
{
    switch (property_id) {
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
    }
}

static void
virt_viewer_session_spice_dispose(GObject *obj)
{
    VirtViewerSessionSpice *spice = VIRT_VIEWER_SESSION_SPICE(obj);

    if (spice->priv->session) {
        spice_session_disconnect(spice->priv->session);
        g_object_unref(spice->priv->session);
    }
    if (spice->priv->audio)
        g_object_unref(spice->priv->audio);

    G_OBJECT_CLASS(virt_viewer_session_spice_parent_class)->finalize(obj);
}


static void
virt_viewer_session_spice_class_init(VirtViewerSessionSpiceClass *klass)
{
    VirtViewerSessionClass *dclass = VIRT_VIEWER_SESSION_CLASS(klass);
    GObjectClass *oclass = G_OBJECT_CLASS(klass);

    oclass->get_property = virt_viewer_session_spice_get_property;
    oclass->set_property = virt_viewer_session_spice_set_property;
    oclass->dispose = virt_viewer_session_spice_dispose;

    dclass->close = virt_viewer_session_spice_close;
    dclass->open_fd = virt_viewer_session_spice_open_fd;
    dclass->open_host = virt_viewer_session_spice_open_host;
    dclass->open_uri = virt_viewer_session_spice_open_uri;
    dclass->channel_open_fd = virt_viewer_session_spice_channel_open_fd;
    dclass->has_usb = virt_viewer_session_spice_has_usb;
    dclass->usb_device_selection = virt_viewer_session_spice_usb_device_selection;

    g_type_class_add_private(klass, sizeof(VirtViewerSessionSpicePrivate));

    g_object_class_install_property(oclass,
                                    PROP_SPICE_SESSION,
                                    g_param_spec_object("spice-session",
                                                        "Spice session",
                                                        "Spice session",
                                                        SPICE_TYPE_SESSION,
                                                        G_PARAM_READABLE |
                                                        G_PARAM_STATIC_STRINGS));
}

static void
virt_viewer_session_spice_init(VirtViewerSessionSpice *self G_GNUC_UNUSED)
{
    self->priv = VIRT_VIEWER_SESSION_SPICE_GET_PRIVATE(self);
}

static void
usb_connect_failed(GObject *object G_GNUC_UNUSED,
                   SpiceUsbDevice *device G_GNUC_UNUSED,
                   GError *error, VirtViewerSessionSpice *self)
{
    if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
        return;

    g_signal_emit_by_name(self, "session-usb-failed", error->message);
}

static void
create_spice_session(VirtViewerSessionSpice *self)
{
    SpiceUsbDeviceManager *manager;

    g_return_if_fail(self != NULL);
    g_return_if_fail(self->priv->session == NULL);

    self->priv->session = spice_session_new();
    spice_set_session_option(self->priv->session);

    self->priv->gtk_session = spice_gtk_session_get(self->priv->session);
    g_object_set(self->priv->gtk_session, "auto-clipboard", TRUE, NULL);

    g_signal_connect(self->priv->session, "channel-new",
                     G_CALLBACK(virt_viewer_session_spice_channel_new), self);
    g_signal_connect(self->priv->session, "channel-destroy",
                     G_CALLBACK(virt_viewer_session_spice_channel_destroy), self);

    manager = spice_usb_device_manager_get(self->priv->session, NULL);
    if (manager)
        g_signal_connect(manager, "auto-connect-failed",
                         G_CALLBACK(usb_connect_failed), self);

    g_object_bind_property(self, "auto-usbredir",
                           self->priv->gtk_session, "auto-usbredir",
                           G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
}

static void
virt_viewer_session_spice_close(VirtViewerSession *session)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);

    g_return_if_fail(self != NULL);

    virt_viewer_session_clear_displays(session);

    if (self->priv->session) {
        spice_session_disconnect(self->priv->session);
        g_object_unref(self->priv->session);
        self->priv->session = NULL;
        self->priv->gtk_session = NULL;

        if (self->priv->audio)
            g_object_unref(self->priv->audio);
        self->priv->audio = NULL;
    }

    /* FIXME: version 0.7 of spice-gtk allows reuse of session */
    create_spice_session(self);
}

static gboolean
virt_viewer_session_spice_open_host(VirtViewerSession *session,
                                    char *host,
                                    char *port)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);

    g_return_val_if_fail(self != NULL, FALSE);
    g_return_val_if_fail(self->priv->session != NULL, FALSE);

    g_object_set(self->priv->session,
                 "host", host,
                 "port", port,
                 NULL);

    return spice_session_connect(self->priv->session);
}

static gboolean
virt_viewer_session_spice_open_uri(VirtViewerSession *session,
                                   char *uri)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);

    g_return_val_if_fail(self != NULL, FALSE);
    g_return_val_if_fail(self->priv->session != NULL, FALSE);

    g_object_set(self->priv->session, "uri", uri, NULL);

    return spice_session_connect(self->priv->session);
}

static gboolean
virt_viewer_session_spice_open_fd(VirtViewerSession *session,
                                  int fd)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);

    g_return_val_if_fail(self != NULL, FALSE);

    return spice_session_open_fd(self->priv->session, fd);
}

static gboolean
virt_viewer_session_spice_channel_open_fd(VirtViewerSession *session,
                                          VirtViewerSessionChannel *channel,
                                          int fd)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);

    g_return_val_if_fail(self != NULL, FALSE);

    return spice_channel_open_fd(SPICE_CHANNEL(channel), fd);
}

static void
virt_viewer_session_spice_channel_open_fd_request(SpiceChannel *channel,
                                                  gint tls G_GNUC_UNUSED,
                                                  VirtViewerSession *session)
{
    g_signal_emit_by_name(session, "session-channel-open", channel);
}

static void
virt_viewer_session_spice_main_channel_event(SpiceChannel *channel G_GNUC_UNUSED,
                                             SpiceChannelEvent event,
                                             VirtViewerSession *session)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);
    char *password = NULL;

    g_return_if_fail(self != NULL);

    switch (event) {
    case SPICE_CHANNEL_OPENED:
        DEBUG_LOG("main channel: opened");
        break;
    case SPICE_CHANNEL_CLOSED:
        DEBUG_LOG("main channel: closed");
        g_signal_emit_by_name(session, "session-disconnected");
        break;
    case SPICE_CHANNEL_ERROR_CONNECT:
        DEBUG_LOG("main channel: failed to connect");
        g_signal_emit_by_name(session, "session-disconnected");
        break;
    case SPICE_CHANNEL_ERROR_AUTH:
        DEBUG_LOG("main channel: auth failure (wrong password?)");
        int ret = virt_viewer_auth_collect_credentials("SPICE",
                                                       NULL,
                                                       NULL, &password);
        if (ret < 0) {
            g_signal_emit_by_name(session, "session-cancelled");
        } else {
            g_object_set(self->priv->session, "password", password, NULL);
            spice_session_connect(self->priv->session);
        }
        break;
    default:
        g_message("unhandled spice main channel event: %d", event);
        g_signal_emit_by_name(session, "session-disconnected");
        break;
    }

    g_free(password);
}

static gboolean
virt_viewer_session_spice_has_usb(VirtViewerSession *session)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);
    VirtViewerSessionSpicePrivate *priv = self->priv;

    return spice_usb_device_manager_get(priv->session, NULL) &&
        spice_session_has_channel_type(priv->session,
                                       SPICE_CHANNEL_USBREDIR);
}

static void
virt_viewer_session_spice_usb_device_selection(VirtViewerSession *session,
                                               GtkWindow *parent)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);
    VirtViewerSessionSpicePrivate *priv = self->priv;
    GtkWidget *dialog, *area, *usb_device_widget;

    /* Create the widgets */
    dialog = gtk_dialog_new_with_buttons(
                                         _("Select USB devices for redirection"), parent,
                                         GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
                                         GTK_STOCK_OK, GTK_RESPONSE_ACCEPT,
                                         NULL);
    gtk_dialog_set_default_response(GTK_DIALOG(dialog), GTK_RESPONSE_ACCEPT);
    area = gtk_dialog_get_content_area(GTK_DIALOG(dialog));

    usb_device_widget = spice_usb_device_widget_new(priv->session,
                                                    "%s %s");
    g_signal_connect(usb_device_widget, "connect-failed",
                     G_CALLBACK(usb_connect_failed), self);
    gtk_box_pack_start(GTK_BOX(area), usb_device_widget, TRUE, TRUE, 5);

    /* show and run */
    gtk_widget_show_all(dialog);
    gtk_dialog_run(GTK_DIALOG(dialog));
    gtk_widget_destroy(dialog);
}

static void
virt_viewer_session_spice_channel_new(SpiceSession *s,
                                      SpiceChannel *channel,
                                      VirtViewerSession *session)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);
    int id;

    g_return_if_fail(self != NULL);

    g_signal_connect(channel, "open-fd",
                     G_CALLBACK(virt_viewer_session_spice_channel_open_fd_request), self);

    g_object_get(channel, "channel-id", &id, NULL);

    if (SPICE_IS_MAIN_CHANNEL(channel)) {
        g_signal_connect(channel, "channel-event",
                         G_CALLBACK(virt_viewer_session_spice_main_channel_event), self);
    }

    if (SPICE_IS_DISPLAY_CHANNEL(channel)) {
        GtkWidget *display;

        g_signal_emit_by_name(session, "session-connected");

        DEBUG_LOG("new session channel (#%d)", id);
        display = virt_viewer_display_spice_new(channel,
                                                spice_display_new(s, id));

        virt_viewer_session_add_display(VIRT_VIEWER_SESSION(session),
                                        VIRT_VIEWER_DISPLAY(display));

        g_signal_emit_by_name(session, "session-initialized");
    }

    if (SPICE_IS_INPUTS_CHANNEL(channel)) {
        DEBUG_LOG("new inputs channel");
    }

    if (SPICE_IS_PLAYBACK_CHANNEL(channel)) {
        DEBUG_LOG("new audio channel");
        if (self->priv->audio != NULL)
            return;
        self->priv->audio = spice_audio_new(s, NULL, NULL);
    }
}

static void
virt_viewer_session_spice_channel_destroy(G_GNUC_UNUSED SpiceSession *s,
                                          SpiceChannel *channel,
                                          VirtViewerSession *session)
{
    VirtViewerSessionSpice *self = VIRT_VIEWER_SESSION_SPICE(session);
    int id;

    g_return_if_fail(self != NULL);

    g_object_get(channel, "channel-id", &id, NULL);
    if (SPICE_IS_MAIN_CHANNEL(channel)) {
        DEBUG_LOG("zap main channel");
    }

    if (SPICE_IS_DISPLAY_CHANNEL(channel)) {
        DEBUG_LOG("zap session channel (#%d)", id);
    }

    if (SPICE_IS_PLAYBACK_CHANNEL(channel) && self->priv->audio) {
        DEBUG_LOG("zap audio channel");
        g_object_unref(self->priv->audio);
        self->priv->audio = NULL;
    }
}

VirtViewerSession *
virt_viewer_session_spice_new(void)
{
    VirtViewerSessionSpice *self;

    self = g_object_new(VIRT_VIEWER_TYPE_SESSION_SPICE, NULL);

    create_spice_session(self);

    return VIRT_VIEWER_SESSION(self);
}

/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 *  indent-tabs-mode: nil
 * End:
 */