//
// 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)
//
#include "td/telegram/MessageExtendedMedia.h"

#include "td/telegram/Document.h"
#include "td/telegram/DocumentsManager.h"
#include "td/telegram/MessageContent.h"
#include "td/telegram/MessageContentType.h"
#include "td/telegram/PhotoSize.h"
#include "td/telegram/Td.h"
#include "td/telegram/VideosManager.h"

#include "td/utils/algorithm.h"
#include "td/utils/logging.h"

namespace td {

MessageExtendedMedia::MessageExtendedMedia(
    Td *td, telegram_api::object_ptr<telegram_api::MessageExtendedMedia> &&extended_media, FormattedText &&caption,
    DialogId owner_dialog_id) {
  if (extended_media == nullptr) {
    return;
  }
  caption_ = std::move(caption);

  switch (extended_media->get_id()) {
    case telegram_api::messageExtendedMediaPreview::ID: {
      auto media = move_tl_object_as<telegram_api::messageExtendedMediaPreview>(extended_media);
      type_ = Type::Preview;
      duration_ = media->video_duration_;
      dimensions_ = get_dimensions(media->w_, media->h_, "MessageExtendedMedia");
      if (media->thumb_ != nullptr) {
        if (media->thumb_->get_id() == telegram_api::photoStrippedSize::ID) {
          auto thumb = move_tl_object_as<telegram_api::photoStrippedSize>(media->thumb_);
          minithumbnail_ = thumb->bytes_.as_slice().str();
        } else {
          LOG(ERROR) << "Receive " << to_string(media->thumb_);
        }
      }
      break;
    }
    case telegram_api::messageExtendedMedia::ID: {
      auto media = move_tl_object_as<telegram_api::messageExtendedMedia>(extended_media);
      type_ = Type::Unsupported;
      switch (media->media_->get_id()) {
        case telegram_api::messageMediaPhoto::ID: {
          auto photo = move_tl_object_as<telegram_api::messageMediaPhoto>(media->media_);
          if (photo->photo_ == nullptr) {
            break;
          }

          photo_ = get_photo(td->file_manager_.get(), std::move(photo->photo_), owner_dialog_id);
          if (photo_.is_empty()) {
            break;
          }
          type_ = Type::Photo;
          break;
        }
        case telegram_api::messageMediaDocument::ID: {
          auto document = move_tl_object_as<telegram_api::messageMediaDocument>(media->media_);
          if (document->document_ == nullptr) {
            break;
          }

          auto document_ptr = std::move(document->document_);
          int32 document_id = document_ptr->get_id();
          if (document_id == telegram_api::documentEmpty::ID) {
            break;
          }
          CHECK(document_id == telegram_api::document::ID);

          auto parsed_document = td->documents_manager_->on_get_document(
              move_tl_object_as<telegram_api::document>(document_ptr), owner_dialog_id, nullptr);
          if (parsed_document.empty() || parsed_document.type != Document::Type::Video) {
            break;
          }
          CHECK(parsed_document.file_id.is_valid());
          video_file_id_ = parsed_document.file_id;
          type_ = Type::Video;
          break;
        }
        default:
          break;
      }
      if (type_ == Type::Unsupported) {
        unsupported_version_ = CURRENT_VERSION;
      }
      break;
    }
    default:
      UNREACHABLE();
  }
}

Result<MessageExtendedMedia> MessageExtendedMedia::get_message_extended_media(
    Td *td, td_api::object_ptr<td_api::InputMessageContent> &&extended_media_content, DialogId owner_dialog_id,
    bool is_premium) {
  if (extended_media_content == nullptr) {
    return MessageExtendedMedia();
  }
  if (!owner_dialog_id.is_valid()) {
    return Status::Error(400, "Extended media can't be added to the invoice");
  }

  auto input_content_type = extended_media_content->get_id();
  if (input_content_type != td_api::inputMessagePhoto::ID && input_content_type != td_api::inputMessageVideo::ID) {
    return Status::Error("Invalid extended media content specified");
  }
  TRY_RESULT(input_message_content,
             get_input_message_content(owner_dialog_id, std::move(extended_media_content), td, is_premium));
  if (input_message_content.ttl != 0) {
    return Status::Error("Can't use self-destructing extended media");
  }

  auto content = input_message_content.content.get();
  auto content_type = content->get_type();
  MessageExtendedMedia result;
  CHECK(content_type == MessageContentType::Photo || content_type == MessageContentType::Video);
  result.caption_ = *get_message_content_caption(content);
  if (content_type == MessageContentType::Photo) {
    result.type_ = Type::Photo;
    result.photo_ = *get_message_content_photo(content);
  } else {
    result.type_ = Type::Video;
    result.video_file_id_ = get_message_content_upload_file_id(content);
  }
  return result;
}

void MessageExtendedMedia::update_from(const MessageExtendedMedia &old_extended_media) {
  if (!is_media() && old_extended_media.is_media()) {
    *this = old_extended_media;
  }
}

bool MessageExtendedMedia::update_to(Td *td,
                                     telegram_api::object_ptr<telegram_api::MessageExtendedMedia> extended_media_ptr,
                                     DialogId owner_dialog_id) {
  MessageExtendedMedia new_extended_media(td, std::move(extended_media_ptr), FormattedText(caption_), owner_dialog_id);
  if (!new_extended_media.is_media() && is_media()) {
    return false;
  }
  if (*this != new_extended_media || is_equal_but_different(new_extended_media)) {
    *this = std::move(new_extended_media);
    return true;
  }
  return false;
}

td_api::object_ptr<td_api::MessageExtendedMedia> MessageExtendedMedia::get_message_extended_media_object(
    Td *td, bool skip_bot_commands, int32 max_media_timestamp) const {
  if (type_ == Type::Empty) {
    return nullptr;
  }

  auto caption = get_formatted_text_object(caption_, skip_bot_commands, max_media_timestamp);
  switch (type_) {
    case Type::Unsupported:
      return td_api::make_object<td_api::messageExtendedMediaUnsupported>(std::move(caption));
    case Type::Preview:
      return td_api::make_object<td_api::messageExtendedMediaPreview>(dimensions_.width, dimensions_.height, duration_,
                                                                      get_minithumbnail_object(minithumbnail_),
                                                                      std::move(caption));
    case Type::Photo: {
      auto photo = get_photo_object(td->file_manager_.get(), photo_);
      CHECK(photo != nullptr);
      return td_api::make_object<td_api::messageExtendedMediaPhoto>(std::move(photo), std::move(caption));
    }
    case Type::Video:
      return td_api::make_object<td_api::messageExtendedMediaVideo>(
          td->videos_manager_->get_video_object(video_file_id_), std::move(caption));
    default:
      UNREACHABLE();
      return nullptr;
  }
}

void MessageExtendedMedia::append_file_ids(const Td *td, vector<FileId> &file_ids) const {
  switch (type_) {
    case Type::Empty:
    case Type::Unsupported:
    case Type::Preview:
      break;
    case Type::Photo:
      append(file_ids, photo_get_file_ids(photo_));
      break;
    case Type::Video:
      Document(Document::Type::Video, video_file_id_).append_file_ids(td, file_ids);
      break;
    default:
      UNREACHABLE();
      break;
  }
}

void MessageExtendedMedia::delete_thumbnail(Td *td) {
  switch (type_) {
    case Type::Empty:
    case Type::Unsupported:
    case Type::Preview:
      break;
    case Type::Photo:
      photo_delete_thumbnail(photo_);
      break;
    case Type::Video:
      td->videos_manager_->delete_video_thumbnail(video_file_id_);
      break;
    default:
      UNREACHABLE();
      break;
  }
}

int32 MessageExtendedMedia::get_duration(const Td *td) const {
  if (!has_media_timestamp()) {
    return 0;
  }
  return td->videos_manager_->get_video_duration(video_file_id_);
}

FileId MessageExtendedMedia::get_upload_file_id() const {
  switch (type_) {
    case Type::Empty:
    case Type::Unsupported:
    case Type::Preview:
      break;
    case Type::Photo:
      return get_photo_upload_file_id(photo_);
    case Type::Video:
      return video_file_id_;
    default:
      UNREACHABLE();
      break;
  }
  return FileId();
}

FileId MessageExtendedMedia::get_any_file_id() const {
  switch (type_) {
    case Type::Empty:
    case Type::Unsupported:
    case Type::Preview:
      break;
    case Type::Photo:
      return get_photo_any_file_id(photo_);
    case Type::Video:
      return video_file_id_;
    default:
      UNREACHABLE();
      break;
  }
  return FileId();
}

FileId MessageExtendedMedia::get_thumbnail_file_id(const Td *td) const {
  switch (type_) {
    case Type::Empty:
    case Type::Unsupported:
    case Type::Preview:
      break;
    case Type::Photo:
      return get_photo_thumbnail_file_id(photo_);
    case Type::Video:
      return td->videos_manager_->get_video_thumbnail_file_id(video_file_id_);
    default:
      UNREACHABLE();
      break;
  }
  return FileId();
}

telegram_api::object_ptr<telegram_api::InputMedia> MessageExtendedMedia::get_input_media(
    Td *td, tl_object_ptr<telegram_api::InputFile> input_file,
    tl_object_ptr<telegram_api::InputFile> input_thumbnail) const {
  switch (type_) {
    case Type::Empty:
    case Type::Unsupported:
    case Type::Preview:
      break;
    case Type::Photo:
      return photo_get_input_media(td->file_manager_.get(), photo_, std::move(input_file), 0);
    case Type::Video:
      return td->videos_manager_->get_input_media(video_file_id_, std::move(input_file), std::move(input_thumbnail), 0);
    default:
      UNREACHABLE();
      break;
  }
  return nullptr;
}

bool MessageExtendedMedia::is_equal_but_different(const MessageExtendedMedia &other) const {
  return type_ == Type::Unsupported && other.type_ == Type::Unsupported &&
         unsupported_version_ != other.unsupported_version_;
}

bool operator==(const MessageExtendedMedia &lhs, const MessageExtendedMedia &rhs) {
  if (lhs.type_ != rhs.type_ || lhs.caption_ != rhs.caption_) {
    return false;
  }
  switch (lhs.type_) {
    case MessageExtendedMedia::Type::Empty:
      return true;
    case MessageExtendedMedia::Type::Unsupported:
      // don't compare unsupported_version_
      return true;
    case MessageExtendedMedia::Type::Preview:
      return lhs.duration_ == rhs.duration_ && lhs.dimensions_ == rhs.dimensions_ &&
             lhs.minithumbnail_ == rhs.minithumbnail_;
    case MessageExtendedMedia::Type::Photo:
      return lhs.photo_ == rhs.photo_;
    case MessageExtendedMedia::Type::Video:
      return lhs.video_file_id_ == rhs.video_file_id_;
    default:
      UNREACHABLE();
      return true;
  }
}

bool operator!=(const MessageExtendedMedia &lhs, const MessageExtendedMedia &rhs) {
  return !(lhs == rhs);
}

}  // namespace td