#pragma once

#include <map>
#include <memory>
#include "optional.hpp"
#include <amuse/amuse.hpp>
#include <athena/FileReader.hpp>

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <CommCtrl.h>

namespace amuse {
class VSTBackend;
class VSTEditor;
class AudioGroupFilePresenter;

struct AudioGroupDataCollection {
  std::wstring m_path;
  std::wstring m_name;

  std::vector<uint8_t> m_projData;
  std::vector<uint8_t> m_poolData;
  std::vector<uint8_t> m_sdirData;
  std::vector<uint8_t> m_sampData;

  struct MetaData {
    amuse::DataFormat fmt;
    uint32_t absOffs;
    uint32_t active;
    MetaData(amuse::DataFormat fmtIn, uint32_t absOffsIn, uint32_t activeIn)
    : fmt(fmtIn), absOffs(absOffsIn), active(activeIn) {}
    MetaData(athena::io::FileReader& r)
    : fmt(amuse::DataFormat(r.readUint32Little())), absOffs(r.readUint32Little()), active(r.readUint32Little()) {}
  };
  std::experimental::optional<MetaData> m_metaData;

  std::experimental::optional<amuse::AudioGroupData> m_loadedData;
  const amuse::AudioGroup* m_loadedGroup;
  struct GroupToken {
    int m_groupId;
    const amuse::SongGroupIndex* m_song = nullptr;
    const amuse::SFXGroupIndex* m_sfx = nullptr;
    GroupToken(int id, const amuse::SongGroupIndex* song) : m_groupId(id), m_song(song) {}
    GroupToken(int id, const amuse::SFXGroupIndex* sfx) : m_groupId(id), m_sfx(sfx) {}
  };
  std::vector<GroupToken> m_groupTokens;

  bool loadProj();
  bool loadPool();
  bool loadSdir();
  bool loadSamp();
  bool loadMeta();

  AudioGroupDataCollection(std::wstring_view path, std::wstring_view name);
  bool isDataComplete() const {
    return m_projData.size() && m_poolData.size() && m_sdirData.size() && m_sampData.size() && m_metaData;
  }
  bool _attemptLoad();
  bool _indexData();

  void addToEngine(amuse::Engine& engine);
  void removeFromEngine(amuse::Engine& engine) const;
};

struct AudioGroupCollection {
  using GroupIterator = std::map<std::wstring, std::unique_ptr<AudioGroupDataCollection>>::iterator;
  std::wstring m_path;
  std::wstring m_name;

  std::map<std::wstring, std::unique_ptr<AudioGroupDataCollection>> m_groups;
  std::vector<GroupIterator> m_iteratorVec;

  AudioGroupCollection(std::wstring_view path, std::wstring_view name);
  void addCollection(std::vector<std::pair<std::wstring, amuse::IntrusiveAudioGroupData>>&& collection);
  void update(AudioGroupFilePresenter& presenter);
  void populateFiles(VSTEditor& editor, HTREEITEM colHandle, size_t parentIdx);
};

class AudioGroupFilePresenter {
  friend class VSTBackend;

public:
  using CollectionIterator = std::map<std::wstring, std::unique_ptr<AudioGroupCollection>>::iterator;

private:
  VSTBackend& m_backend;
  std::map<std::wstring, std::unique_ptr<AudioGroupCollection>> m_audioGroupCollections;
  std::vector<CollectionIterator> m_iteratorVec;

public:
  AudioGroupFilePresenter(VSTBackend& backend) : m_backend(backend) {}
  void update();
  void populateCollectionColumn(VSTEditor& editor);
  void populateGroupColumn(VSTEditor& editor, int collectionIdx, int fileIdx);
  void populatePageColumn(VSTEditor& editor, int collectionIdx, int fileIdx, int groupIdx);
  void addCollection(std::wstring_view name,
                     std::vector<std::pair<std::wstring, amuse::IntrusiveAudioGroupData>>&& collection);
  void removeCollection(unsigned idx);
  VSTBackend& getBackend() { return m_backend; }
};
} // namespace amuse