/*
 *  Copyright (c) 2012-2013 Andrzej Radecki <andrzejr@xfce.org>
 *  Copyright (c) 2017      Viktor Odintsev <ninetls@xfce.org>
 *
 *  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 Library 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.
 */



#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "sn-dialog.h"

#include "common/panel-private.h"
#include "libxfce4panel/libxfce4panel.h"

#include <gio/gdesktopappinfo.h>
#include <libxfce4ui/libxfce4ui.h>
#include <libxfce4util/libxfce4util.h>



static gboolean
sn_dialog_build (SnDialog *dialog);

static void
sn_dialog_finalize (GObject *object);



struct _SnDialog
{
  GObject __parent__;

  GtkBuilder *builder;
  GtkWidget *dialog;
  GtkWidget *auto_size;
  GtkWidget *size_spinbutton;
  GtkWidget *size_revealer;
  GObject *store;
  GObject *legacy_store;
  SnConfig *config;
};

G_DEFINE_FINAL_TYPE (SnDialog, sn_dialog, G_TYPE_OBJECT)



enum
{
  COLUMN_ICON,
  COLUMN_TITLE,
  COLUMN_HIDDEN,
  COLUMN_TIP
};



static void
sn_dialog_class_init (SnDialogClass *klass)
{
  GObjectClass *object_class;

  object_class = G_OBJECT_CLASS (klass);
  object_class->finalize = sn_dialog_finalize;
}



static void
sn_dialog_init (SnDialog *dialog)
{
  dialog->builder = NULL;
  dialog->dialog = NULL;
  dialog->store = NULL;
  dialog->legacy_store = NULL;
  dialog->config = NULL;
}



static void
sn_dialog_add_item (SnDialog *dialog,
                    GObject *store,
                    GIcon *icon,
                    const gchar *name,
                    const gchar *title,
                    gboolean hidden)
{
  GtkTreeIter iter;

  g_return_if_fail (SN_IS_DIALOG (dialog));
  g_return_if_fail (GTK_IS_LIST_STORE (store));
  g_return_if_fail (name == NULL || g_utf8_validate (name, -1, NULL));

  /* insert in the store */
  gtk_list_store_append (GTK_LIST_STORE (store), &iter);
  gtk_list_store_set (GTK_LIST_STORE (store), &iter,
                      COLUMN_ICON, icon,
                      COLUMN_TITLE, title,
                      COLUMN_HIDDEN, hidden,
                      COLUMN_TIP, name,
                      -1);
}



static void
sn_dialog_update_names (SnDialog *dialog,
                        GObject *store,
                        SnItemType type)
{
  g_return_if_fail (SN_IS_DIALOG (dialog));
  g_return_if_fail (SN_IS_CONFIG (dialog->config));
  g_return_if_fail (GTK_IS_LIST_STORE (store));

  for (GList *li = sn_config_get_known_items (dialog->config, type); li != NULL; li = li->next)
    {
      const gchar *name = li->data;
      gchar *title = li->data;
      gchar *icon_name = li->data;
      GIcon *icon = NULL;
      gchar *desktop_id = g_strdup_printf ("%s.desktop", name);
      GDesktopAppInfo *app_info = g_desktop_app_info_new (desktop_id);
      g_free (desktop_id);

      if (app_info == NULL)
        {
          gchar ***desktop_ids = g_desktop_app_info_search (name);
          if (desktop_ids[0] != NULL)
            app_info = g_desktop_app_info_new (desktop_ids[0][0]);

          for (gchar ***p = desktop_ids; *p != NULL; p++)
            g_strfreev (*p);
          g_free (desktop_ids);
        }
      if (app_info != NULL)
        {
          title = g_desktop_app_info_get_locale_string (app_info, G_KEY_FILE_DESKTOP_KEY_NAME);
          icon_name = g_desktop_app_info_get_string (app_info, G_KEY_FILE_DESKTOP_KEY_ICON);
          g_object_unref (app_info);
        }

      if (g_path_is_absolute (icon_name))
        {
          GFile *file = g_file_new_for_path (icon_name);
          icon = g_file_icon_new (file);
          g_object_unref (file);
        }
      else
        icon = g_themed_icon_new (icon_name);

      /* insert item in the store */
      sn_dialog_add_item (dialog, store, icon, name, title,
                          sn_config_is_hidden (dialog->config, type, name));

      if (icon != NULL)
        g_object_unref (G_OBJECT (icon));
      if (app_info != NULL)
        {
          g_free (title);
          g_free (icon_name);
        }
    }
}



static void
sn_dialog_selection_changed (GtkTreeSelection *selection,
                             SnDialog *dialog)
{
  GtkTreeModel *model;
  GtkTreeIter iter;
  GtkTreePath *path;
  gint *indices;
  gint count = 0, position = -1, depth;
  gboolean item_up_sensitive, item_down_sensitive;
  GObject *object;
  GObject *treeview = G_OBJECT (gtk_tree_selection_get_tree_view (selection));
  SnItemType type = treeview == gtk_builder_get_object (dialog->builder, "items-treeview") ? SN_ITEM_TYPE_DEFAULT
                                                                                           : SN_ITEM_TYPE_LEGACY;

  if (gtk_tree_selection_get_selected (selection, &model, &iter))
    {
      path = gtk_tree_model_get_path (model, &iter);
      indices = gtk_tree_path_get_indices_with_depth (path, &depth);

      if (indices != NULL && depth > 0)
        position = indices[0];

      count = gtk_tree_model_iter_n_children (model, NULL);

      gtk_tree_path_free (path);
    }

  item_up_sensitive = position > 0;
  item_down_sensitive = position + 1 < count;

  object = gtk_builder_get_object (
    dialog->builder, type == SN_ITEM_TYPE_DEFAULT ? "item-up" : "legacy-item-up");
  if (GTK_IS_BUTTON (object))
    gtk_widget_set_sensitive (GTK_WIDGET (object), item_up_sensitive);

  object = gtk_builder_get_object (
    dialog->builder, type == SN_ITEM_TYPE_DEFAULT ? "item-down" : "legacy-item-down");
  if (GTK_IS_BUTTON (object))
    gtk_widget_set_sensitive (GTK_WIDGET (object), item_down_sensitive);
}



static void
sn_dialog_hidden_toggled (GObject *renderer,
                          const gchar *path_string,
                          SnDialog *dialog)
{
  GObject *store;
  GtkTreeIter iter;
  gboolean hidden;
  gchar *name;
  SnItemType type;

  g_return_if_fail (SN_IS_DIALOG (dialog));
  g_return_if_fail (SN_IS_CONFIG (dialog->config));
  g_return_if_fail (GTK_IS_LIST_STORE (dialog->store));

  if (renderer == gtk_builder_get_object (dialog->builder, "hidden-toggle"))
    {
      store = dialog->store;
      type = SN_ITEM_TYPE_DEFAULT;
    }
  else
    {
      store = dialog->legacy_store;
      type = SN_ITEM_TYPE_LEGACY;
    }

  if (gtk_tree_model_get_iter_from_string (GTK_TREE_MODEL (store), &iter, path_string))
    {
      gtk_tree_model_get (GTK_TREE_MODEL (store), &iter,
                          COLUMN_HIDDEN, &hidden,
                          COLUMN_TIP, &name, -1);

      /* insert value (we need to update it) */
      hidden = !hidden;

      /* update box and store with new state */
      sn_config_set_hidden (dialog->config, type, name, hidden);
      gtk_list_store_set (GTK_LIST_STORE (store), &iter, COLUMN_HIDDEN, hidden, -1);

      g_free (name);
    }
}



static void
sn_dialog_swap_rows (SnDialog *dialog,
                     GObject *store,
                     SnItemType type,
                     GtkTreeIter *iter_prev,
                     GtkTreeIter *iter)
{
  GIcon *icon1, *icon2;
  gchar *title1, *title2;
  gboolean hidden1, hidden2;
  gchar *tip1, *tip2;

  g_return_if_fail (SN_IS_DIALOG (dialog));
  g_return_if_fail (SN_IS_CONFIG (dialog->config));
  g_return_if_fail (GTK_IS_LIST_STORE (store));

  gtk_tree_model_get (GTK_TREE_MODEL (store), iter_prev,
                      COLUMN_ICON, &icon1,
                      COLUMN_TITLE, &title1,
                      COLUMN_HIDDEN, &hidden1,
                      COLUMN_TIP, &tip1, -1);
  gtk_tree_model_get (GTK_TREE_MODEL (store), iter,
                      COLUMN_ICON, &icon2,
                      COLUMN_TITLE, &title2,
                      COLUMN_HIDDEN, &hidden2,
                      COLUMN_TIP, &tip2, -1);
  gtk_list_store_set (GTK_LIST_STORE (store), iter_prev,
                      COLUMN_ICON, icon2,
                      COLUMN_TITLE, title2,
                      COLUMN_HIDDEN, hidden2,
                      COLUMN_TIP, tip2, -1);
  gtk_list_store_set (GTK_LIST_STORE (store), iter,
                      COLUMN_ICON, icon1,
                      COLUMN_TITLE, title1,
                      COLUMN_HIDDEN, hidden1,
                      COLUMN_TIP, tip1, -1);

  /* do a matching operation on SnConfig */
  sn_config_swap_known_items (dialog->config, type, tip1, tip2);
}



static gboolean
sn_dialog_iter_equal (GtkTreeIter *iter1,
                      GtkTreeIter *iter2)
{
  return iter1->user_data == iter2->user_data
         && iter1->user_data2 == iter2->user_data2
         && iter1->user_data3 == iter2->user_data3;
}



static void
sn_dialog_item_up_clicked (GObject *button,
                           SnDialog *dialog)
{
  GObject *store, *treeview;
  GtkTreeSelection *selection;
  GtkTreeIter iter, iter_prev, iter_tmp;
  SnItemType type;

  g_return_if_fail (SN_IS_DIALOG (dialog));

  if (button == gtk_builder_get_object (dialog->builder, "item-up"))
    {
      store = dialog->store;
      treeview = gtk_builder_get_object (dialog->builder, "items-treeview");
      type = SN_ITEM_TYPE_DEFAULT;
    }
  else
    {
      store = dialog->legacy_store;
      treeview = gtk_builder_get_object (dialog->builder, "legacy-items-treeview");
      type = SN_ITEM_TYPE_LEGACY;
    }

  selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview));
  if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
    return;

  /* gtk_tree_model_iter_previous available from Gtk3 */
  /* so we have to search for it starting from the first iter */
  if (!gtk_tree_model_get_iter_first (GTK_TREE_MODEL (store), &iter_prev))
    return;

  iter_tmp = iter_prev;
  while (!sn_dialog_iter_equal (&iter_tmp, &iter))
    {
      iter_prev = iter_tmp;
      if (!gtk_tree_model_iter_next (GTK_TREE_MODEL (store), &iter_tmp))
        return;
    }

  sn_dialog_swap_rows (dialog, store, type, &iter_prev, &iter);
  gtk_tree_selection_select_iter (selection, &iter_prev);
}



static void
sn_dialog_item_down_clicked (GObject *button,
                             SnDialog *dialog)
{
  GObject *store, *treeview;
  GtkTreeSelection *selection;
  GtkTreeIter iter, iter_next;
  SnItemType type;

  g_return_if_fail (SN_IS_DIALOG (dialog));

  if (button == gtk_builder_get_object (dialog->builder, "item-down"))
    {
      store = dialog->store;
      treeview = gtk_builder_get_object (dialog->builder, "items-treeview");
      type = SN_ITEM_TYPE_DEFAULT;
    }
  else
    {
      store = dialog->legacy_store;
      treeview = gtk_builder_get_object (dialog->builder, "legacy-items-treeview");
      type = SN_ITEM_TYPE_LEGACY;
    }

  selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview));
  if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
    return;

  iter_next = iter;
  if (!gtk_tree_model_iter_next (GTK_TREE_MODEL (store), &iter_next))
    return;

  sn_dialog_swap_rows (dialog, store, type, &iter, &iter_next);
  gtk_tree_selection_select_iter (selection, &iter_next);
}



static void
sn_dialog_clear_clicked (GtkWidget *button,
                         SnDialog *dialog)
{
  const gchar *label = _("Clear");

  g_return_if_fail (SN_IS_DIALOG (dialog));

  if (xfce_dialog_confirm (GTK_WINDOW (gtk_widget_get_toplevel (button)), "edit-clear", label,
                           NULL, _("Are you sure you want to clear the list of known items?")))
    {
      if (sn_config_items_clear (dialog->config))
        {
          gtk_list_store_clear (GTK_LIST_STORE (dialog->store));
          sn_dialog_update_names (dialog, dialog->store, SN_ITEM_TYPE_DEFAULT);
        }
      if (sn_config_legacy_items_clear (dialog->config))
        {
          gtk_list_store_clear (GTK_LIST_STORE (dialog->legacy_store));
          sn_dialog_update_names (dialog, dialog->legacy_store, SN_ITEM_TYPE_LEGACY);
        }
    }
}



static void
sn_dialog_dialog_unref (gpointer data,
                        GObject *where_the_object_was)
{
  SnDialog *dialog = data;

  dialog->dialog = NULL;
  g_object_unref (dialog);
}



static void
reveal_icon_size (GtkWidget *widget,
                  GParamSpec *pspec,
                  SnDialog *dialog)
{
  gboolean active;
  gint icon_size;

  g_return_if_fail (SN_IS_DIALOG (dialog));

  active = gtk_switch_get_active (GTK_SWITCH (widget));

  if (active)
    icon_size = 0;
  else
    icon_size = DEFAULT_ICON_SIZE;

  gtk_revealer_set_reveal_child (GTK_REVEALER (dialog->size_revealer), !active);
  gtk_spin_button_set_value (GTK_SPIN_BUTTON (dialog->size_spinbutton), icon_size);
}



static gboolean
sn_dialog_build (SnDialog *dialog)
{
  GObject *object;
  GError *error = NULL;
  GtkTreeSelection *selection;

  if (xfce_titled_dialog_get_type () == 0)
    return FALSE;

  dialog->builder = gtk_builder_new ();
  gtk_builder_set_translation_domain (dialog->builder, GETTEXT_PACKAGE);

  /* load the builder data into the object */
  if (gtk_builder_add_from_resource (dialog->builder, "/org/xfce/panel/sn-dialog.glade", &error))
    {
      object = gtk_builder_get_object (dialog->builder, "dialog");
      g_return_val_if_fail (XFCE_IS_TITLED_DIALOG (object), FALSE);
      dialog->dialog = GTK_WIDGET (object);

      object = gtk_builder_get_object (dialog->builder, "close-button");
      g_return_val_if_fail (GTK_IS_BUTTON (object), FALSE);
      g_signal_connect_swapped (G_OBJECT (object), "clicked",
                                G_CALLBACK (gtk_widget_destroy),
                                dialog->dialog);

      object = gtk_builder_get_object (dialog->builder, "switch-auto-size");
      g_return_val_if_fail (GTK_IS_WIDGET (object), FALSE);
      dialog->auto_size = GTK_WIDGET (object);

      object = gtk_builder_get_object (dialog->builder, "spinbutton-icon-size");
      g_return_val_if_fail (GTK_IS_WIDGET (object), FALSE);
      g_object_bind_property (G_OBJECT (dialog->config), "icon-size",
                              G_OBJECT (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (object))),
                              "value", G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);
      dialog->size_spinbutton = GTK_WIDGET (object);

      object = gtk_builder_get_object (dialog->builder, "revealer-icon-size");
      g_return_val_if_fail (GTK_IS_WIDGET (object), FALSE);
      dialog->size_revealer = GTK_WIDGET (object);

      if (sn_config_get_icon_size_is_automatic (dialog->config))
        {
          gtk_switch_set_active (GTK_SWITCH (dialog->auto_size), TRUE);
          gtk_revealer_set_reveal_child (GTK_REVEALER (dialog->size_revealer), FALSE);
        }

      g_signal_connect (G_OBJECT (dialog->auto_size), "notify::active",
                        G_CALLBACK (reveal_icon_size), dialog);

      object = gtk_builder_get_object (dialog->builder, "checkbutton-single-row");
      g_return_val_if_fail (GTK_IS_WIDGET (object), FALSE);
      g_object_bind_property (G_OBJECT (dialog->config), "single-row",
                              G_OBJECT (object), "active",
                              G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

      object = gtk_builder_get_object (dialog->builder, "checkbutton-square-icons");
      g_return_val_if_fail (GTK_IS_WIDGET (object), FALSE);
      g_object_bind_property (G_OBJECT (dialog->config), "square-icons",
                              G_OBJECT (object), "active",
                              G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

      object = gtk_builder_get_object (dialog->builder, "checkbutton-symbolic-icons");
      g_return_val_if_fail (GTK_IS_WIDGET (object), FALSE);
      g_object_bind_property (G_OBJECT (dialog->config), "symbolic-icons",
                              G_OBJECT (object), "active",
                              G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

      object = gtk_builder_get_object (dialog->builder, "checkbutton-menu-is-primary");
      g_return_val_if_fail (GTK_IS_WIDGET (object), FALSE);
      g_object_bind_property (G_OBJECT (dialog->config), "menu-is-primary",
                              G_OBJECT (object), "active",
                              G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

      object = gtk_builder_get_object (dialog->builder, "checkbutton-hide-new-items");
      g_return_val_if_fail (GTK_IS_WIDGET (object), FALSE);
      g_object_bind_property (G_OBJECT (dialog->config), "hide-new-items",
                              G_OBJECT (object), "active",
                              G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

      dialog->store = gtk_builder_get_object (dialog->builder, "items-store");
      g_return_val_if_fail (GTK_IS_LIST_STORE (dialog->store), FALSE);
      sn_dialog_update_names (dialog, dialog->store, SN_ITEM_TYPE_DEFAULT);

      object = gtk_builder_get_object (dialog->builder, "items-treeview");
      g_return_val_if_fail (GTK_IS_TREE_VIEW (object), FALSE);
      gtk_tree_view_set_tooltip_column (GTK_TREE_VIEW (object), COLUMN_TIP);

      selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (object));
      g_signal_connect (G_OBJECT (selection), "changed",
                        G_CALLBACK (sn_dialog_selection_changed), dialog);
      sn_dialog_selection_changed (selection, dialog);

      object = gtk_builder_get_object (dialog->builder, "hidden-toggle");
      g_return_val_if_fail (GTK_IS_CELL_RENDERER_TOGGLE (object), FALSE);
      g_signal_connect (G_OBJECT (object), "toggled",
                        G_CALLBACK (sn_dialog_hidden_toggled), dialog);

      object = gtk_builder_get_object (dialog->builder, "item-up");
      g_return_val_if_fail (GTK_IS_BUTTON (object), FALSE);
      g_signal_connect (G_OBJECT (object), "clicked",
                        G_CALLBACK (sn_dialog_item_up_clicked), dialog);

      object = gtk_builder_get_object (dialog->builder, "item-down");
      g_return_val_if_fail (GTK_IS_BUTTON (object), FALSE);
      g_signal_connect (G_OBJECT (object), "clicked",
                        G_CALLBACK (sn_dialog_item_down_clicked), dialog);

      dialog->legacy_store = gtk_builder_get_object (dialog->builder, "legacy-items-store");
      g_return_val_if_fail (GTK_IS_LIST_STORE (dialog->legacy_store), FALSE);
      sn_dialog_update_names (dialog, dialog->legacy_store, SN_ITEM_TYPE_LEGACY);

      object = gtk_builder_get_object (dialog->builder, "legacy-items-treeview");
      g_return_val_if_fail (GTK_IS_TREE_VIEW (object), FALSE);
      gtk_tree_view_set_tooltip_column (GTK_TREE_VIEW (object), COLUMN_TIP);

      selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (object));
      g_signal_connect (G_OBJECT (selection), "changed",
                        G_CALLBACK (sn_dialog_selection_changed), dialog);
      sn_dialog_selection_changed (selection, dialog);

      object = gtk_builder_get_object (dialog->builder, "legacy-hidden-toggle");
      g_return_val_if_fail (GTK_IS_CELL_RENDERER_TOGGLE (object), FALSE);
      g_signal_connect (G_OBJECT (object), "toggled",
                        G_CALLBACK (sn_dialog_hidden_toggled), dialog);

      object = gtk_builder_get_object (dialog->builder, "legacy-item-up");
      g_return_val_if_fail (GTK_IS_BUTTON (object), FALSE);
      g_signal_connect (G_OBJECT (object), "clicked",
                        G_CALLBACK (sn_dialog_item_up_clicked), dialog);

      object = gtk_builder_get_object (dialog->builder, "legacy-item-down");
      g_return_val_if_fail (GTK_IS_BUTTON (object), FALSE);
      g_signal_connect (G_OBJECT (object), "clicked",
                        G_CALLBACK (sn_dialog_item_down_clicked), dialog);

      object = gtk_builder_get_object (dialog->builder, "items-clear");
      g_return_val_if_fail (GTK_IS_BUTTON (object), FALSE);
      g_signal_connect (G_OBJECT (object), "clicked",
                        G_CALLBACK (sn_dialog_clear_clicked), dialog);

#ifndef HAVE_DBUSMENU
      object = gtk_builder_get_object (dialog->builder, "sn_box");
      gtk_widget_hide (GTK_WIDGET (object));
      object = gtk_builder_get_object (dialog->builder, "items_stack_switcher");
      gtk_widget_hide (GTK_WIDGET (object));
#endif

      if (!WINDOWING_IS_X11 ())
        {
          object = gtk_builder_get_object (dialog->builder, "systray_frame");
          gtk_widget_hide (GTK_WIDGET (object));
          object = gtk_builder_get_object (dialog->builder, "items_stack_switcher");
          gtk_widget_hide (GTK_WIDGET (object));
        }

      g_object_weak_ref (G_OBJECT (dialog->dialog), sn_dialog_dialog_unref, dialog);
      return TRUE;
    }
  else
    {
      g_critical ("Failed to construct the builder: %s.",
                  error->message);
      g_error_free (error);
      return FALSE;
    }
}



SnDialog *
sn_dialog_new (SnConfig *config,
               GdkScreen *screen)
{
  SnDialog *dialog;

  g_return_val_if_fail (SN_IS_CONFIG (config), NULL);

  dialog = g_object_new (SN_TYPE_DIALOG, NULL);
  dialog->config = config;

  if (sn_dialog_build (dialog))
    {
      gtk_widget_show (dialog->dialog);
      gtk_window_set_screen (GTK_WINDOW (dialog->dialog), screen);
      return dialog;
    }
  else
    {
      g_object_unref (dialog);
      return NULL;
    }
}



static void
sn_dialog_finalize (GObject *object)
{
  SnDialog *dialog = SN_DIALOG (object);

  if (dialog->dialog != NULL)
    gtk_widget_destroy (dialog->dialog);

  if (dialog->builder != NULL)
    g_object_unref (dialog->builder);

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