/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2019 Olive Team

  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 "probeserver.h"

#include <QApplication>
#include <QDebug>
#include <QFileInfo>

#include "decoder/ffmpeg/ffmpegdecoder.h"

QVector<Decoder*> ReceiveListOfAllDecoders() {
  QVector<Decoder*> decoders;

  decoders.append(new FFmpegDecoder());

  return decoders;
}

void FreeListOfDecoders(const QVector<Decoder*>& decoders, Decoder* except = nullptr) {
  foreach (Decoder* d, decoders) {
    if (except == nullptr || except != d) {
      delete d;
    }
  }
}

bool olive::ProbeMedia(Footage *f)
{
  // Check for a valid filename
  if (f->filename().isEmpty()) {
    qWarning() << QCoreApplication::translate("ProbeMedia", "Tried to probe media with an empty filename");
    return false;
  }

  // Check file exists
  if (!QFileInfo::exists(f->filename())) {
    qWarning() << QCoreApplication::translate("ProbeMedia", "Tried to probe file that doesn't exist");
    return false;
  }

  // Reset Footage state for probing
  f->Clear();

  // Create list to iterate through
  QVector<Decoder*> decoder_list = ReceiveListOfAllDecoders();

  Decoder* found_decoder = nullptr;

  // Pass Footage through each Decoder's probe function
  for (int i=0;i<decoder_list.size();i++) {

    Decoder* decoder = decoder_list.at(i);

    if (decoder->Probe(f)) {

      // FIXME: Cache the results so we don't have to probe if this media is added a second time

      found_decoder = decoder;
      break;
    }
  }

  if (found_decoder == nullptr) {
    // We aren't able to use this Footage
    f->set_status(Footage::kInvalid);
    f->set_decoder(QString());
  } else {
    // We found a Decoder, so we can set this media as valid
    f->set_status(Footage::kReady);

    // Attach the successful Decoder to this Footage object
    f->set_decoder(found_decoder->id());
  }

  FreeListOfDecoders(decoder_list);

  return (found_decoder != nullptr);
}

Decoder* olive::CreateDecoderFromID(const QString &id)
{
  if (id.isEmpty()) {
    return nullptr;
  }

  // Create list to iterate through
  QVector<Decoder*> decoder_list = ReceiveListOfAllDecoders();

  Decoder* found_decoder = nullptr;

  foreach (Decoder* d, decoder_list) {
    if (d->id() == id) {
      found_decoder = d;
      break;
    }
  }

  FreeListOfDecoders(decoder_list, found_decoder);

  return found_decoder;
}