#pragma once

// 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 "errorchecking.h"

class MinGapBetweenSubtitles : public ErrorChecking {
 public:
  MinGapBetweenSubtitles()
      : ErrorChecking("min-gap-between-subtitles",
                      _("Minimum Gap between Subtitles"),
                      _("Detects and fixes subtitles when the minimum gap "
                        "between subtitles is too short.")) {
    m_minGBS = 100;
  }

  virtual void init() {
    m_minGBS = cfg::get_int("timing", "min-gap-between-subtitles");
  }

  bool execute(Info &info) {
    if (!info.nextSub)
      return false;

    long gap =
        (info.nextSub.get_start() - info.currentSub.get_end()).totalmsecs;

    if (gap >= m_minGBS)
      return false;

    long middle = info.currentSub.get_end().totalmsecs + (gap / 2);
    long halfGBS = m_minGBS / 2;

    SubtitleTime new_current(middle - halfGBS);
    SubtitleTime new_next(middle + halfGBS);

    if (info.tryToFix) {
      info.currentSub.set_end(new_current);
      info.nextSub.set_start(new_next);

      return true;
    }

    // only error & solution
    info.error =
        build_message(_("Too short gap between subtitle: <b>%ims</b>"), gap);

    info.solution =
        build_message(_("<b>Automatic correction:</b> to clip current subtitle "
                        "end to %s and to move next subtitle start to %s."),
                      new_current.str().c_str(), new_next.str().c_str());

    return true;
  }

 protected:
  int m_minGBS;
};
