// subtitleeditor -- a tool to create or edit subtitle
//
// https://kitone.github.io/subtitleeditor/
// https://github.com/kitone/subtitleeditor/
//
// Copyright @ 2005-2018, kitone
//
// 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/>.

#include <debug.h>
#include <extension/action.h>
#include <i18n.h>

class DuplicateSelectedSubtitlesPlugin : public Action {
 public:
  DuplicateSelectedSubtitlesPlugin() {
    activate();
    update_ui();
  }

  ~DuplicateSelectedSubtitlesPlugin() {
    deactivate();
  }

  void activate() {
    se_dbg(SE_DBG_PLUGINS);

    // actions
    action_group = Gtk::ActionGroup::create("DuplicateSelectedSubtitlesPlugin");

    action_group->add(
        Gtk::Action::create("duplicate-selected-subtitles", _("_Duplicate"),
                            _("Duplicate the selected subtitles")),
        sigc::mem_fun(*this, &DuplicateSelectedSubtitlesPlugin::on_execute));

    // ui
    Glib::RefPtr<Gtk::UIManager> ui = get_ui_manager();

    ui_id = ui->new_merge_id();

    ui->insert_action_group(action_group);

    ui->add_ui(ui_id, "/menubar/menu-edit/duplicate-selected-subtitles",
               "duplicate-selected-subtitles", "duplicate-selected-subtitles");
  }

  void deactivate() {
    se_dbg(SE_DBG_PLUGINS);

    Glib::RefPtr<Gtk::UIManager> ui = get_ui_manager();

    ui->remove_ui(ui_id);
    ui->remove_action_group(action_group);
  }

  void update_ui() {
    se_dbg(SE_DBG_PLUGINS);

    bool visible = (get_current_document() != NULL);

    action_group->get_action("duplicate-selected-subtitles")
        ->set_sensitive(visible);
  }

 protected:
  void on_execute() {
    se_dbg(SE_DBG_PLUGINS);

    execute();
  }

  bool execute() {
    se_dbg(SE_DBG_PLUGINS);

    Document *doc = get_current_document();

    g_return_val_if_fail(doc, false);

    Subtitles subtitles = doc->subtitles();

    std::vector<Subtitle> selection = subtitles.get_selection();

    if (selection.empty()) {
      doc->flash_message(_("Please select at least a subtitle."));
      return false;
    }

    doc->start_command(_("Duplicate selected subtitles"));

    for (auto it = selection.rbegin(); it != selection.rend(); ++it) {
      Subtitle next = subtitles.insert_after(*it);
      (*it).copy_to(next);
    }

    doc->emit_signal("subtitle-time-changed");
    doc->finish_command();

    return true;
  }

 protected:
  Gtk::UIManager::ui_merge_id ui_id;
  Glib::RefPtr<Gtk::ActionGroup> action_group;
};

REGISTER_EXTENSION(DuplicateSelectedSubtitlesPlugin)
