// Copyright 2015 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

#ifndef MPD_BASE_DASH_IOP_MPD_NOTIFIER_H_
#define MPD_BASE_DASH_IOP_MPD_NOTIFIER_H_

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

#include <map>
#include <string>
#include <vector>

#include "packager/base/synchronization/lock.h"
#include "packager/mpd/base/mpd_notifier_util.h"
#include "packager/mpd/base/mpd_options.h"

namespace shaka {

class AdaptationSet;
class MpdBuilder;
class Period;
class Representation;

/// This class is an MpdNotifier which will try its best to generate a
/// DASH IF IOPv3 compliant MPD.
/// e.g.
/// All <ContentProtection> elements must be right under
/// <AdaptationSet> and cannot be under <Representation>.
/// All video Adaptation Sets have Role set to "main".
class DashIopMpdNotifier : public MpdNotifier {
 public:
  explicit DashIopMpdNotifier(const MpdOptions& mpd_options);
  ~DashIopMpdNotifier() override;

  /// None of the methods write out the MPD file until Flush() is called.
  /// @name MpdNotifier implemetation overrides.
  /// @{
  bool Init() override;
  bool NotifyNewContainer(const MediaInfo& media_info, uint32_t* id) override;
  bool NotifySampleDuration(uint32_t container_id,
                            uint32_t sample_duration) override;
  bool NotifyNewSegment(uint32_t id,
                        uint64_t start_time,
                        uint64_t duration,
                        uint64_t size) override;
  bool 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) override;
  bool AddContentProtectionElement(
      uint32_t id,
      const ContentProtectionElement& content_protection_element) override;
  bool Flush() override;
  /// @}

 private:
  friend class DashIopMpdNotifierTest;

  // Testing only method. Returns a pointer to MpdBuilder.
  MpdBuilder* MpdBuilderForTesting() const {
    return mpd_builder_.get();
  }

  // Testing only method. Sets mpd_builder_.
  void SetMpdBuilderForTesting(std::unique_ptr<MpdBuilder> mpd_builder) {
    mpd_builder_ = std::move(mpd_builder);
  }

  // MPD output path.
  std::string output_path_;
  std::unique_ptr<MpdBuilder> mpd_builder_;
  Period* period_ = nullptr;  // owned by |mpd_builder_|.
  base::Lock lock_;

  // Maps representation ID to Representation.
  std::map<uint32_t, Representation*> representation_map_;
  // Maps Representation ID to AdaptationSet. This is for updating the PSSH.
  std::map<uint32_t, AdaptationSet*> representation_id_to_adaptation_set_;
};

}  // namespace shaka

#endif  // MPD_BASE_DASH_IOP_MPD_NOTIFIER_H_