/*
 * Photos - access, organize and share your photos on GNOME
 * Copyright © 2016 – 2017 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 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., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */


#include "config.h"

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

#include "photos-base-item.h"
#include "photos-error.h"
#include "photos-filterable.h"
#include "photos-glib.h"
#include "photos-share-point-email.h"
#include "photos-utils.h"


struct _PhotosSharePointEmail
{
  PhotosSharePoint parent_instance;
  GAppInfo *default_app;
  GError *initialization_error;
  gboolean is_initialized;
};

static void photos_share_point_email_filterable_iface_init (PhotosFilterableInterface *iface);
static void photos_share_point_email_initable_iface_init (GInitableIface *iface);


G_DEFINE_TYPE_WITH_CODE (PhotosSharePointEmail, photos_share_point_email, PHOTOS_TYPE_SHARE_POINT,
                         G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, photos_share_point_email_initable_iface_init)
                         G_IMPLEMENT_INTERFACE (PHOTOS_TYPE_FILTERABLE,
                                                photos_share_point_email_filterable_iface_init)
                         photos_utils_ensure_extension_points ();
                         g_io_extension_point_implement (PHOTOS_SHARE_POINT_EXTENSION_POINT_NAME,
                                                         g_define_type_id,
                                                         "email",
                                                         0));


static GIcon *
photos_share_point_email_get_icon (PhotosSharePoint *share_point)
{
  PhotosSharePointEmail *self = PHOTOS_SHARE_POINT_EMAIL (share_point);
  GIcon *icon;

  icon = g_app_info_get_icon (self->default_app);
  return icon;
}


static const gchar *
photos_share_point_email_get_id (PhotosFilterable *filterable)
{
  return "email";
}


static const gchar *
photos_share_point_email_get_name (PhotosSharePoint *share_point)
{
  return _("E-Mail");
}


static void
photos_share_point_email_share_save_to_dir (GObject *source_object, GAsyncResult *res, gpointer user_data)
{
  PhotosSharePointEmail *self;
  GError *error;
  GFile *file = NULL;
  GTask *task = G_TASK (user_data);
  PhotosBaseItem *item = PHOTOS_BASE_ITEM (source_object);
  gchar *escaped_path = NULL;
  gchar *path = NULL;
  gchar *uri = NULL;

  self = PHOTOS_SHARE_POINT_EMAIL (g_task_get_source_object (task));

  error = NULL;
  file = photos_base_item_save_to_dir_finish (item, res, &error);
  if (error != NULL)
    {
      g_task_return_error (task, error);
      goto out;
    }

  path = g_file_get_path (file);
  escaped_path = g_uri_escape_string (path, G_URI_RESERVED_CHARS_ALLOWED_IN_PATH, FALSE);
  uri = g_strconcat ("mailto:?attach=", escaped_path, NULL);

  error = NULL;
  if (!photos_glib_app_info_launch_uri (self->default_app, uri, NULL, &error))
    {
      g_task_return_error (task, error);
      goto out;
    }

  g_task_return_boolean (task, TRUE);

 out:
  g_free (escaped_path);
  g_free (path);
  g_free (uri);
  g_clear_object (&file);
  g_object_unref (task);
}


static void
photos_share_point_email_share_async (PhotosSharePoint *share_point,
                                      PhotosBaseItem *item,
                                      GCancellable *cancellable,
                                      GAsyncReadyCallback callback,
                                      gpointer user_data)
{
  PhotosSharePointEmail *self = PHOTOS_SHARE_POINT_EMAIL (share_point);
  GFile *export = NULL;
  GTask *task;
  const gchar *user_name;
  gchar *export_dir = NULL;
  gchar *template = NULL;

  task = g_task_new (self, cancellable, callback, user_data);
  g_task_set_source_tag (task, photos_share_point_email_share_async);

  user_name = g_get_user_name ();
  template = g_strdup_printf (PACKAGE_TARNAME "-%s-XXXXXX", user_name);
  export_dir = g_build_filename ("/var/tmp", template, NULL);
  g_mkdtemp (export_dir);

  export = g_file_new_for_path (export_dir);
  photos_base_item_save_to_dir_async (item,
                                      export,
                                      1.0,
                                      cancellable,
                                      photos_share_point_email_share_save_to_dir,
                                      g_object_ref (task));

  g_free (export_dir);
  g_free (template);
  g_object_unref (export);
  g_object_unref (task);
}


static gboolean
photos_share_point_email_share_finish (PhotosSharePoint *share_point, GAsyncResult *res, GError **error)
{
  PhotosSharePointEmail *self = PHOTOS_SHARE_POINT_EMAIL (share_point);
  GTask *task;

  g_return_val_if_fail (g_task_is_valid (res, self), FALSE);
  task = G_TASK (res);

  g_return_val_if_fail (g_task_get_source_tag (task) == photos_share_point_email_share_async, FALSE);
  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);

  return g_task_propagate_boolean (task, error);
}


static void
photos_share_point_email_dispose (GObject *object)
{
  PhotosSharePointEmail *self = PHOTOS_SHARE_POINT_EMAIL (object);

  g_clear_object (&self->default_app);

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


static void
photos_share_point_email_finalize (GObject *object)
{
  PhotosSharePointEmail *self = PHOTOS_SHARE_POINT_EMAIL (object);

  g_clear_error (&self->initialization_error);

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


static void
photos_share_point_email_init (PhotosSharePointEmail *self)
{
}


static void
photos_share_point_email_class_init (PhotosSharePointEmailClass *class)
{
  GObjectClass *object_class = G_OBJECT_CLASS (class);
  PhotosSharePointClass *share_point_class = PHOTOS_SHARE_POINT_CLASS (class);

  object_class->dispose = photos_share_point_email_dispose;
  object_class->finalize = photos_share_point_email_finalize;
  share_point_class->get_icon = photos_share_point_email_get_icon;
  share_point_class->get_name = photos_share_point_email_get_name;
  share_point_class->share_async = photos_share_point_email_share_async;
  share_point_class->share_finish = photos_share_point_email_share_finish;
}


static gboolean
photos_share_point_email_initable_init (GInitable *initable, GCancellable *cancellable, GError **error)
{
  PhotosSharePointEmail *self = PHOTOS_SHARE_POINT_EMAIL (initable);
  gboolean ret_val = FALSE;

  if (self->is_initialized)
    {
      if (self->default_app != NULL)
        ret_val = TRUE;
      else
        g_assert_nonnull (self->initialization_error);

      goto out;
    }

  g_assert_null (self->initialization_error);

  self->default_app = g_app_info_get_default_for_type ("x-scheme-handler/mailto", FALSE);
  if (self->default_app == NULL)
    {
      g_set_error (&self->initialization_error, PHOTOS_ERROR, 0, "Failed to get x-scheme-handler/mailto handler");
      goto out;
    }

  ret_val = TRUE;

 out:
  if (!ret_val)
    {
      g_assert_nonnull (self->initialization_error);
      g_propagate_error (error, g_error_copy (self->initialization_error));
    }

  return ret_val;
}


static void
photos_share_point_email_filterable_iface_init (PhotosFilterableInterface *iface)
{
  iface->get_id = photos_share_point_email_get_id;
}


static void
photos_share_point_email_initable_iface_init (GInitableIface *iface)
{
  iface->init = photos_share_point_email_initable_init;
}
