//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once

#include "td/telegram/DialogId.h"
#include "td/telegram/files/FileType.h"

#include "td/utils/common.h"
#include "td/utils/StringBuilder.h"
#include "td/utils/tl_helpers.h"

#include <array>
#include <unordered_map>

namespace td {

namespace td_api {
class storageStatistics;
class storageStatisticsFast;
}  // namespace td_api

struct FileTypeStat {
  int64 size{0};
  int32 cnt{0};
};

template <class StorerT>
void store(const FileTypeStat &stat, StorerT &storer) {
  using ::td::store;
  store(stat.size, storer);
  store(stat.cnt, storer);
}
template <class ParserT>
void parse(FileTypeStat &stat, ParserT &parser) {
  using ::td::parse;
  parse(stat.size, parser);
  parse(stat.cnt, parser);
}

struct FullFileInfo {
  FileType file_type;
  string path;
  DialogId owner_dialog_id;
  int64 size;
  uint64 atime_nsec;
  uint64 mtime_nsec;
};

struct FileStatsFast {
  int64 size{0};
  int32 count{0};
  int64 database_size{0};
  int64 language_pack_database_size{0};
  int64 log_size{0};
  FileStatsFast(int64 size, int32 count, int64 database_size, int64 language_pack_database_size, int64 log_size)
      : size(size)
      , count(count)
      , database_size(database_size)
      , language_pack_database_size(language_pack_database_size)
      , log_size(log_size) {
  }
  tl_object_ptr<td_api::storageStatisticsFast> get_storage_statistics_fast_object() const;
};

class FileStats {
  bool need_all_files_{false};
  bool split_by_owner_dialog_id_{false};

  using StatByType = std::array<FileTypeStat, MAX_FILE_TYPE>;

  StatByType stat_by_type_;
  std::unordered_map<DialogId, StatByType, DialogIdHash> stat_by_owner_dialog_id_;
  vector<FullFileInfo> all_files_;

  void add_impl(const FullFileInfo &info);

  void add(StatByType &by_type, FileType file_type, int64 size);

  static FileTypeStat get_nontemp_stat(const StatByType &by_type);

  static td_api::object_ptr<td_api::storageStatisticsByChat> get_storage_statistics_by_chat_object(
      DialogId dialog_id, const StatByType &stat_by_type_);

  friend StringBuilder &operator<<(StringBuilder &sb, const FileStats &file_stats);

 public:
  FileStats(bool need_all_files, bool split_by_owner_dialog_id)
      : need_all_files_(need_all_files), split_by_owner_dialog_id_(split_by_owner_dialog_id) {
  }

  void add_copy(const FullFileInfo &info);

  void add(FullFileInfo &&info);

  void apply_dialog_limit(int32 limit);

  void apply_dialog_ids(const vector<DialogId> &dialog_ids);

  tl_object_ptr<td_api::storageStatistics> get_storage_statistics_object() const;

  vector<DialogId> get_dialog_ids() const;

  FileTypeStat get_total_nontemp_stat() const;

  vector<FullFileInfo> get_all_files();
};

StringBuilder &operator<<(StringBuilder &sb, const FileStats &file_stats);

}  // namespace td