// Copyright 2014 Google Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd

#include "packager/mpd/base/simple_mpd_notifier.h"

#include "packager/base/logging.h"
#include "packager/base/stl_util.h"
#include "packager/mpd/base/adaptation_set.h"
#include "packager/mpd/base/mpd_builder.h"
#include "packager/mpd/base/mpd_notifier_util.h"
#include "packager/mpd/base/mpd_utils.h"
#include "packager/mpd/base/representation.h"

namespace shaka {

SimpleMpdNotifier::SimpleMpdNotifier(const MpdOptions& mpd_options)
    : MpdNotifier(mpd_options),
      output_path_(mpd_options.mpd_params.mpd_output),
      mpd_builder_(new MpdBuilder(mpd_options)) {
  for (const std::string& base_url : mpd_options.mpd_params.base_urls)
    mpd_builder_->AddBaseUrl(base_url);
}

SimpleMpdNotifier::~SimpleMpdNotifier() {
}

bool SimpleMpdNotifier::Init() {
  return true;
}

bool SimpleMpdNotifier::NotifyNewContainer(const MediaInfo& media_info,
                                           uint32_t* container_id) {
  DCHECK(container_id);

  ContentType content_type = GetContentType(media_info);
  if (content_type == kContentTypeUnknown)
    return false;

  base::AutoLock auto_lock(lock_);

  // TODO(kqyang): Consider adding a new method MpdBuilder::AddRepresentation.
  // Most of the codes here can be moved inside.
  std::string key = GetAdaptationSetKey(media_info);
  std::string lang = GetLanguage(media_info);
  AdaptationSet** adaptation_set = &adaptation_set_map_[key];
  if (*adaptation_set == NULL)
    *adaptation_set = mpd_builder_->AddAdaptationSet(lang);

  DCHECK(*adaptation_set);
  MediaInfo adjusted_media_info(media_info);
  MpdBuilder::MakePathsRelativeToMpd(output_path_, &adjusted_media_info);
  Representation* representation =
      (*adaptation_set)->AddRepresentation(adjusted_media_info);
  if (representation == NULL)
    return false;

  // For SimpleMpdNotifier, just put it in Representation. It should still
  // generate a valid MPD.
  AddContentProtectionElements(media_info, representation);
  *container_id = representation->id();
  DCHECK(!ContainsKey(representation_map_, representation->id()));
  representation_map_[representation->id()] = representation;
  return true;
}

bool SimpleMpdNotifier::NotifySampleDuration(uint32_t container_id,
                                             uint32_t sample_duration) {
  base::AutoLock auto_lock(lock_);
  RepresentationMap::iterator it = representation_map_.find(container_id);
  if (it == representation_map_.end()) {
    LOG(ERROR) << "Unexpected container_id: " << container_id;
    return false;
  }
  it->second->SetSampleDuration(sample_duration);
  return true;
}

bool SimpleMpdNotifier::NotifyNewSegment(uint32_t container_id,
                                         uint64_t start_time,
                                         uint64_t duration,
                                         uint64_t size) {
  base::AutoLock auto_lock(lock_);
  RepresentationMap::iterator it = representation_map_.find(container_id);
  if (it == representation_map_.end()) {
    LOG(ERROR) << "Unexpected container_id: " << container_id;
    return false;
  }
  it->second->AddNewSegment(start_time, duration, size);
  return true;
}

bool SimpleMpdNotifier::NotifyEncryptionUpdate(
    uint32_t container_id,
    const std::string& drm_uuid,
    const std::vector<uint8_t>& new_key_id,
    const std::vector<uint8_t>& new_pssh) {
  base::AutoLock auto_lock(lock_);
  RepresentationMap::iterator it = representation_map_.find(container_id);
  if (it == representation_map_.end()) {
    LOG(ERROR) << "Unexpected container_id: " << container_id;
    return false;
  }
  it->second->UpdateContentProtectionPssh(drm_uuid,
                                          Uint8VectorToBase64(new_pssh));
  return true;
}

bool SimpleMpdNotifier::AddContentProtectionElement(
    uint32_t container_id,
    const ContentProtectionElement& content_protection_element) {
  base::AutoLock auto_lock(lock_);
  RepresentationMap::iterator it = representation_map_.find(container_id);
  if (it == representation_map_.end()) {
    LOG(ERROR) << "Unexpected container_id: " << container_id;
    return false;
  }
  it->second->AddContentProtectionElement(content_protection_element);
  return true;
}

bool SimpleMpdNotifier::Flush() {
  base::AutoLock auto_lock(lock_);
  return WriteMpdToFile(output_path_, mpd_builder_.get());
}

}  // namespace shaka