#pragma once

// subtitleeditor -- a tool to create or edit subtitle
//
// https://subtitleeditor.github.io/subtitleeditor/
// https://github.com/subtitleeditor/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 <gui/cellrenderercustom.h>
#include <gui/textviewcell.h>
#include <widget_config_utility.h>

#include "page.h"
#include "patternmanager.h"

class ComfirmationPage : public AssistantPage {
   class Column : public Gtk::TreeModel::ColumnRecord {
     public:
      Column() {
         add(num);
         add(accept);
         add(original);
         add(corrected);
      }
      Gtk::TreeModelColumn<guint> num;
      Gtk::TreeModelColumn<bool> accept;
      Gtk::TreeModelColumn<Glib::ustring> original;
      Gtk::TreeModelColumn<Glib::ustring> corrected;
   };

  public:
   ComfirmationPage(BaseObjectType* cobject, const Glib::RefPtr<Gtk::Builder>& builder) : AssistantPage(cobject, builder) {
      builder->get_widget("treeview-comfirmation", m_treeview);
      builder->get_widget("button-comfirmation-mark-all", m_buttonMarkAll);
      builder->get_widget("button-comfirmation-unmark-all", m_buttonUnmarkAll);
      builder->get_widget("check-comfirmation-remove-blank", m_checkRemoveBlank);

      create_treeview();
      init_signals();

      widget_config::read_config_and_connect(m_checkRemoveBlank, "comfirmation-page", "remove-blank");
   }

   void create_treeview() {
      m_liststore = Gtk::ListStore::create(m_column);
      m_treeview->set_model(m_liststore);

      // column Num
      {
         Gtk::TreeViewColumn* column = manage(new Gtk::TreeViewColumn(_("Num")));
         m_treeview->append_column(*column);

         Gtk::CellRendererText* label = manage(new Gtk::CellRendererText);
         column->pack_start(*label);
         column->add_attribute(label->property_text(), m_column.num);
      }
      // column Accept
      {
         Gtk::TreeViewColumn* column = manage(new Gtk::TreeViewColumn(_("Accept")));
         m_treeview->append_column(*column);

         Gtk::CellRendererToggle* toggle = manage(new Gtk::CellRendererToggle);
         column->pack_start(*toggle);
         column->add_attribute(toggle->property_active(), m_column.accept);
         toggle->signal_toggled().connect(sigc::mem_fun(*this, &ComfirmationPage::on_accept_toggled));
      }
      // column Original
      {
         Gtk::TreeViewColumn* column = manage(new Gtk::TreeViewColumn(_("Original Text")));
         m_treeview->append_column(*column);

         CellRendererCustom<TextViewCell>* label = manage(new CellRendererCustom<TextViewCell>);
         column->pack_start(*label);
         column->add_attribute(label->property_text(), m_column.original);
      }
      // column Corrected
      {
         m_column_corrected_text = manage(new Gtk::TreeViewColumn(_("Corrected Text")));
         m_treeview->append_column(*m_column_corrected_text);

         CellRendererCustom<TextViewCell>* renderer = manage(new CellRendererCustom<TextViewCell>);
         m_column_corrected_text->pack_start(*renderer);
         m_column_corrected_text->add_attribute(renderer->property_text(), m_column.corrected);
         renderer->property_editable() = true;
         renderer->signal_edited().connect(sigc::mem_fun(*this, &ComfirmationPage::on_corrected_edited));
      }
      m_treeview->signal_row_activated().connect(sigc::mem_fun(*this, &ComfirmationPage::on_row_activated));
   }

   void init_signals() {
      m_buttonMarkAll->signal_clicked().connect(sigc::mem_fun(*this, &ComfirmationPage::on_mark_all));
      m_buttonUnmarkAll->signal_clicked().connect(sigc::mem_fun(*this, &ComfirmationPage::on_unmark_all));
   }

   bool comfirme(Document* doc, const std::list<Pattern*>& patterns) {
      m_liststore->clear();

      Subtitles subs = doc->subtitles();

      Glib::ustring text, previous;
      for (Subtitle sub = subs.get_first(); sub; ++sub) {
         text = sub.get_text();

         for (const auto& pattern : patterns) {
            pattern->execute(text, previous);
         }

         if (sub.get_text() != text) {
            Gtk::TreeIter it = m_liststore->append();
            (*it)[m_column.num] = sub.get_num();
            (*it)[m_column.accept] = true;
            (*it)[m_column.original] = sub.get_text();
            (*it)[m_column.corrected] = text;
         }

         previous = text;
      }
      return !m_liststore->children().empty();
   }

   Glib::ustring get_page_title() {
      unsigned int size = m_liststore->children().size();
      if (size == 0)
         return _("There Is No Change");

      return Glib::ustring::compose(ngettext("Confirm %1 Change", "Confirm %1 Changes", size), size);
   }

   // Apply the accepted change to the document.
   void apply(Document* doc) {
      g_return_if_fail(doc);

      bool remove_blank = m_checkRemoveBlank->get_active();
      std::vector<Subtitle> blank_subs, selection;

      doc->start_command(_("Text Correction"));
      Subtitles subtitles = doc->subtitles();

      for (Gtk::TreeIter it = m_liststore->children().begin(); it; ++it) {
         bool accept = (*it)[m_column.accept];
         if (accept == false)
            continue;

         unsigned int num = (*it)[m_column.num];
         Glib::ustring corrected = (*it)[m_column.corrected];

         Subtitle sub = subtitles.get(num);
         if (sub.get_text() != corrected) {
            sub.set_text(corrected);
            selection.push_back(sub);
         }
         if (remove_blank)
            if (sub.get_text().empty())
               blank_subs.push_back(sub);
      }
      // Select the modified subtitles
      subtitles.select(selection);
      // Remove the blank subtitles
      if (remove_blank && blank_subs.empty() == false)
         subtitles.remove(blank_subs);

      doc->finish_command();
   }

  protected:
   // Mark all items.
   void on_mark_all() {
      Gtk::TreeIter it = m_liststore->children().begin();
      while (it) {
         (*it)[m_column.accept] = true;
         ++it;
      }
   }

   // Unmark all items.
   void on_unmark_all() {
      Gtk::TreeIter it = m_liststore->children().begin();
      while (it) {
         (*it)[m_column.accept] = false;
         ++it;
      }
   }

   // Toggle the state of accept value.
   void on_accept_toggled(const Glib::ustring& path) {
      Gtk::TreeIter it = m_liststore->get_iter(path);
      if (it) {
         (*it)[m_column.accept] = !static_cast<bool>((*it)[m_column.accept]);
      }
   }

   void on_row_activated(const Gtk::TreeModel::Path& path, Gtk::TreeViewColumn* column) {
      if (column == m_column_corrected_text)
         return;
      on_accept_toggled(path.to_string());
   }

   // Update the item text.
   void on_corrected_edited(const Glib::ustring& path, const Glib::ustring& text) {
      Gtk::TreeIter it = m_liststore->get_iter(path);
      if (it) {
         (*it)[m_column.corrected] = text;
      }
   }

  protected:
   Column m_column;
   Glib::RefPtr<Gtk::ListStore> m_liststore;
   Gtk::TreeView* m_treeview;
   Gtk::TreeViewColumn* m_column_corrected_text;
   Gtk::Button* m_buttonMarkAll;
   Gtk::Button* m_buttonUnmarkAll;
   Gtk::CheckButton* m_checkRemoveBlank;
};