/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2007 Elliot Fairweather
 * Copyright (C) 2007-2008 Collabora Ltd.
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Authors: Elliot Fairweather <elliot.fairweather@collabora.co.uk>
 *          Xavier Claessens <xclaesse@gmail.com>
 */

#include <string.h>

#include <glade/glade.h>
#include <glib/gi18n.h>

#include <telepathy-glib/enums.h>

#include <libempathy/empathy-contact.h>
#include <libempathy/empathy-tp-call.h>
#include <libempathy/empathy-debug.h>
#include <libempathy/empathy-utils.h>
#include <libempathy-gtk/empathy-ui-utils.h>

#include "empathy-call-window.h"

#define DEBUG_DOMAIN "CallWindow"

typedef struct 
{
  GtkWidget *window;
  GtkWidget *status_label;
  GtkWidget *start_call_button;
  GtkWidget *end_call_button;
  GtkWidget *input_volume_scale;
  GtkWidget *output_volume_scale;
  GtkWidget *input_mute_button;
  GtkWidget *output_mute_button;
  GtkWidget *preview_video_frame;
  GtkWidget *output_video_frame;
  GtkWidget *preview_video_socket;
  GtkWidget *output_video_socket;
  GtkWidget *video_button;
  GtkWidget *output_video_label;

  EmpathyTpCall *call;

  GTimeVal start_time;
  guint timeout_event_id;

  gboolean is_drawing;
} EmpathyCallWindow;

static gboolean
call_window_update_timer (gpointer data)
{
  EmpathyCallWindow *window = data;
  GTimeVal current;
  gchar *str;
  glong now, then;
  glong time, seconds, minutes, hours;

  g_get_current_time (&current);

  now = current.tv_sec;
  then = (window->start_time).tv_sec;

  time = now - then;

  seconds = time % 60;
  time /= 60;
  minutes = time % 60;
  time /= 60;
  hours = time % 60;

  if (hours > 0)
      str = g_strdup_printf ("Connected  -  %02ld : %02ld : %02ld", hours,
          minutes, seconds);
  else
      str = g_strdup_printf ("Connected  -  %02ld : %02ld", minutes, seconds);

  gtk_label_set_text (GTK_LABEL (window->status_label), str);

  g_free (str);

  return TRUE;
}

static void
call_window_stop_timeout (EmpathyCallWindow *window)
{
  empathy_debug (DEBUG_DOMAIN, "Timer stopped");

  if (window->timeout_event_id)
    {
      g_source_remove (window->timeout_event_id);
      window->timeout_event_id = 0;
    }
}

static void
call_window_set_output_video_is_drawing (EmpathyCallWindow *window,
                                         gboolean is_drawing)
{
  GtkWidget* child;

  child = gtk_bin_get_child (GTK_BIN (window->output_video_frame));

  empathy_debug (DEBUG_DOMAIN,
      "Setting output video is drawing - %d", is_drawing);

  if (is_drawing && !window->is_drawing)
    {
      if (child)
          gtk_container_remove (GTK_CONTAINER (window->output_video_frame),
              child);
      gtk_container_add (GTK_CONTAINER (window->output_video_frame),
          window->output_video_socket);
      gtk_widget_show (window->output_video_socket);
      empathy_tp_call_add_output_video (window->call,
          gtk_socket_get_id (GTK_SOCKET (window->output_video_socket)));
    }
  if (!is_drawing && window->is_drawing)
    {
      empathy_tp_call_add_output_video (window->call, 0);
      if (child)
          gtk_container_remove (GTK_CONTAINER (window->output_video_frame),
              child);
      gtk_container_add (GTK_CONTAINER (window->output_video_frame),
          window->output_video_label);
      gtk_widget_show (window->output_video_label);
    }

  window->is_drawing = is_drawing;
}

static void
call_window_finalize (EmpathyCallWindow *window)
{
  if (window->call)
    { 
      call_window_stop_timeout (window);
      call_window_set_output_video_is_drawing (window, FALSE);
      empathy_tp_call_remove_preview_video (window->call,
          gtk_socket_get_id (GTK_SOCKET (window->preview_video_socket)));
      g_object_unref (window->call);
      window->call = NULL;
    }
}

static void
call_window_socket_realized_cb (GtkWidget *widget,
                                EmpathyCallWindow *window)
{
  if (widget == window->preview_video_socket)
    {
      empathy_debug (DEBUG_DOMAIN, "Preview socket realized");
      empathy_tp_call_add_preview_video (window->call,
          gtk_socket_get_id (GTK_SOCKET (window->preview_video_socket)));
    }
  else
      empathy_debug (DEBUG_DOMAIN, "Output socket realized");
}

static void
call_window_video_button_toggled_cb (GtkWidget *button,
                                     EmpathyCallWindow *window)
{
  gboolean is_sending;

  is_sending = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button));

  empathy_debug (DEBUG_DOMAIN, "Send video toggled - %d", is_sending);

  empathy_tp_call_request_video_stream_direction (window->call, is_sending);
}

static void
call_window_start_call_button_clicked_cb (GtkWidget *widget,
                                          EmpathyCallWindow *window)
{
  empathy_debug (DEBUG_DOMAIN, "Start call clicked");

  gtk_widget_set_sensitive (window->start_call_button, FALSE);
  empathy_tp_call_accept_incoming_call (window->call);
}

static void
call_window_end_call_button_clicked_cb (GtkWidget *widget,
                                        EmpathyCallWindow *window)
{
  empathy_debug (DEBUG_DOMAIN, "End call clicked");

  gtk_widget_set_sensitive (window->end_call_button, FALSE);
  call_window_finalize (window);
}

static void
call_window_output_volume_changed_cb (GtkWidget *scale,
                                      EmpathyCallWindow *window)
{
  guint volume;

  volume = (guint) gtk_range_get_value (GTK_RANGE (scale));

  empathy_debug (DEBUG_DOMAIN, "Output volume changed - %u", volume);

  empathy_tp_call_set_output_volume (window->call, volume);
}

static void
call_window_output_mute_button_toggled_cb (GtkWidget *button,
                                           EmpathyCallWindow *window)
{
  gboolean is_muted;

  is_muted = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button));

  empathy_debug (DEBUG_DOMAIN, "Mute output toggled - %d", is_muted);

  empathy_tp_call_mute_output (window->call, is_muted);
}

static void
call_window_input_mute_button_toggled_cb (GtkWidget *button,
                                          EmpathyCallWindow *window)
{
  gboolean is_muted;

  is_muted = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button));

  empathy_debug (DEBUG_DOMAIN, "Mute input toggled - %d", is_muted);

  empathy_tp_call_mute_input (window->call, is_muted);
}

static gboolean
call_window_delete_event_cb (GtkWidget *widget,
                             GdkEvent *event,
                             EmpathyCallWindow *window)
{
  GtkWidget *dialog;
  gint result;
  guint status;

  empathy_debug (DEBUG_DOMAIN, "Delete event occurred");

  g_object_get (G_OBJECT (window->call), "status", &status, NULL);
  if (status == EMPATHY_TP_CALL_STATUS_ACCEPTED)
    {
      dialog = gtk_message_dialog_new (GTK_WINDOW (window->window),
          GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
          GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO,
          "This call will be ended. Continue?");

      result = gtk_dialog_run (GTK_DIALOG (dialog));
      gtk_widget_destroy (dialog);

      if (result != GTK_RESPONSE_YES)
          return TRUE;
    }

  return FALSE;
}

static void
call_window_destroy_cb (GtkWidget *widget,
                        EmpathyCallWindow *window)
{
  call_window_finalize (window);
  g_object_unref (window->output_video_socket);
  g_object_unref (window->preview_video_socket);
  g_object_unref (window->output_video_label);
  g_slice_free (EmpathyCallWindow, window);
}

static void
call_window_update (EmpathyCallWindow *window)
{
  EmpathyContact *contact;
  guint status;
  guint stream_state;
  EmpathyTpCallStream *audio_stream;
  EmpathyTpCallStream *video_stream;
  gboolean is_incoming;
  gchar *title;

  g_object_get (window->call,
      "status", &status,
      "audio-stream", &audio_stream,
      "video-stream", &video_stream,
      "contact", &contact,
      "is-incoming", &is_incoming,
      NULL);

  if (video_stream->state > audio_stream->state)
      stream_state = video_stream->state;
  else
      stream_state = audio_stream->state;

  empathy_debug (DEBUG_DOMAIN, "Status changed - status: %d, stream state: %d, "
      "is-incoming: %d video-stream direction: %d",
      status, stream_state, is_incoming, video_stream->direction);

  /* Depending on the status we have to set:
   * - window's title
   * - status's label
   * - sensibility of all buttons
   * */
  if (status == EMPATHY_TP_CALL_STATUS_READYING)
    {
      gtk_window_set_title (GTK_WINDOW (window->window), _("Empathy Call"));
      gtk_label_set_text (GTK_LABEL (window->status_label), _("Readying"));
      gtk_widget_set_sensitive (window->start_call_button, is_incoming);
      gtk_widget_set_sensitive (window->end_call_button, FALSE);
      gtk_widget_set_sensitive (window->video_button, FALSE);
      gtk_widget_set_sensitive (window->input_volume_scale, FALSE);
      gtk_widget_set_sensitive (window->output_volume_scale, FALSE);
      gtk_widget_set_sensitive (window->input_mute_button, FALSE);
      gtk_widget_set_sensitive (window->output_mute_button, FALSE);
    }
  else if (status == EMPATHY_TP_CALL_STATUS_PENDING)
    {
      title = g_strdup_printf (_("%s - Empathy Call"),
          empathy_contact_get_name (contact));

      gtk_window_set_title (GTK_WINDOW (window->window), title);
      gtk_label_set_text (GTK_LABEL (window->status_label), _("Ringing"));
      gtk_widget_set_sensitive (window->start_call_button, is_incoming);
      gtk_widget_set_sensitive (window->end_call_button, TRUE);
    }
  else if (status == EMPATHY_TP_CALL_STATUS_ACCEPTED)
    {
      gboolean receiving_video;
      gboolean sending_video;

      if (stream_state == TP_MEDIA_STREAM_STATE_DISCONNECTED)
          gtk_label_set_text (GTK_LABEL (window->status_label), "Disconnected");
      if (stream_state == TP_MEDIA_STREAM_STATE_CONNECTING)
          gtk_label_set_text (GTK_LABEL (window->status_label), "Connecting");
      else if (stream_state == TP_MEDIA_STREAM_STATE_CONNECTED &&
               window->timeout_event_id == 0)
        {
          /* The call started, launch the timer */
          g_get_current_time (&(window->start_time));
          window->timeout_event_id = g_timeout_add_seconds (1,
              call_window_update_timer, window);
          call_window_update_timer (window);
        }

      receiving_video = video_stream->direction & TP_MEDIA_STREAM_DIRECTION_RECEIVE;
      sending_video = video_stream->direction & TP_MEDIA_STREAM_DIRECTION_SEND;
      call_window_set_output_video_is_drawing (window, receiving_video);
      g_signal_handlers_block_by_func (window->video_button,
          call_window_video_button_toggled_cb, window);
      gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (window->video_button),
          sending_video);
      g_signal_handlers_unblock_by_func (window->video_button,
          call_window_video_button_toggled_cb, window);

      gtk_widget_set_sensitive (window->video_button, TRUE);
      gtk_widget_set_sensitive (window->input_volume_scale, TRUE);
      gtk_widget_set_sensitive (window->output_volume_scale, TRUE);
      gtk_widget_set_sensitive (window->input_mute_button, TRUE);
      gtk_widget_set_sensitive (window->output_mute_button, TRUE);
    }
  else if (status == EMPATHY_TP_CALL_STATUS_CLOSED)
    {
      gtk_label_set_text (GTK_LABEL (window->status_label), "Closed");
      gtk_widget_set_sensitive (window->start_call_button, FALSE);
      gtk_widget_set_sensitive (window->end_call_button, FALSE);
      gtk_widget_set_sensitive (window->video_button, FALSE);
      gtk_widget_set_sensitive (window->input_volume_scale, FALSE);
      gtk_widget_set_sensitive (window->output_volume_scale, FALSE);
      gtk_widget_set_sensitive (window->input_mute_button, FALSE);
      gtk_widget_set_sensitive (window->output_mute_button, FALSE);

      call_window_finalize (window);
    }
  if (contact)
      g_object_unref (contact);
}

GtkWidget *
empathy_call_window_new (EmpathyTpCall *call)
{
  EmpathyCallWindow *window;
  GladeXML *glade;
  gchar *filename;

  g_return_val_if_fail (EMPATHY_IS_TP_CALL (call), NULL);

  window = g_slice_new0 (EmpathyCallWindow);
  window->call = g_object_ref (call);

  filename = empathy_file_lookup ("empathy-call-window.glade", "src");
  glade = empathy_glade_get_file (filename,
      "window",
      NULL,
      "window", &window->window,
      "status_label", &window->status_label,
      "start_call_button", &window->start_call_button,
      "end_call_button", &window->end_call_button,
      "input_volume_scale", &window->input_volume_scale,
      "output_volume_scale", &window->output_volume_scale,
      "input_mute_button", &window->input_mute_button,
      "output_mute_button", &window->output_mute_button,
      "preview_video_frame", &window->preview_video_frame,
      "output_video_frame", &window->output_video_frame,
      "video_button", &window->video_button,
      NULL);
  g_free (filename);

  empathy_glade_connect (glade,
      window,
      "window", "destroy", call_window_destroy_cb,
      "window", "delete_event", call_window_delete_event_cb,
      "input_mute_button", "toggled", call_window_input_mute_button_toggled_cb,
      "output_mute_button", "toggled", call_window_output_mute_button_toggled_cb,
      "output_volume_scale", "value-changed", call_window_output_volume_changed_cb,
      "start_call_button", "clicked", call_window_start_call_button_clicked_cb,
      "end_call_button", "clicked", call_window_end_call_button_clicked_cb,
      "video_button", "toggled", call_window_video_button_toggled_cb,
      NULL);

  g_object_unref (glade);

  /* Output video label */
  window->output_video_label = g_object_ref (gtk_label_new ("No video output"));
  gtk_container_add (GTK_CONTAINER (window->output_video_frame),
      window->output_video_label);
  gtk_widget_show (window->output_video_label);

  /* Output video socket */
  window->output_video_socket = g_object_ref (gtk_socket_new ());
  g_signal_connect (GTK_OBJECT (window->output_video_socket), "realize",
      G_CALLBACK (call_window_socket_realized_cb), window);
  gtk_widget_show (window->output_video_socket);

  /* Preview video socket */
  window->preview_video_socket = g_object_ref (gtk_socket_new ());
  g_signal_connect (GTK_OBJECT (window->preview_video_socket), "realize",
      G_CALLBACK (call_window_socket_realized_cb), window);
  gtk_container_add (GTK_CONTAINER (window->preview_video_frame),
      window->preview_video_socket);
  gtk_widget_show (window->preview_video_socket);

  g_signal_connect_swapped (G_OBJECT (window->call), "notify",
      G_CALLBACK (call_window_update),
      window);

  call_window_update (window);
  gtk_widget_show (window->window);

  return window->window;
}