#pragma once

namespace sp {

/**
 * \brief Append a pointer to the buffer
 * \param data The data to append
 */
template <typename T, typename = typename std::enable_if_t<!std::is_abstract_v<T>>>
DataBuffer& operator<<(DataBuffer& buffer, const std::shared_ptr<T>& data) {
	return buffer << *data;
}

/**
 * \brief Append a pointer to the buffer
 * \param data The data to append
 */
template <typename T, typename = typename std::enable_if_t<!std::is_abstract_v<T>>>
DataBuffer& operator<<(DataBuffer& buffer, const std::unique_ptr<T>& data) {
	return buffer << *data;
}

/**
 * \brief Append a vector to the buffer by first writing the size
 * \param data The vector to append
 */
template <typename T>
DataBuffer& operator<<(DataBuffer& buffer, const std::vector<T>& data) {
	buffer << VarInt{data.size()};
	for (const auto& element : data) {
		buffer << element;
	}
	return buffer;
}

/**
 * \brief Append a list to the buffer by first writing the size
 * \param data The list to append
 */
template <typename T>
DataBuffer& operator<<(DataBuffer& buffer, const std::list<T>& data) {
	buffer << VarInt{data.size()};
	for (const auto& element : data) {
		buffer << element;
	}
	return buffer;
}

/**
 * \brief Append a map to the buffer by first writing the size
 * \param data The map to append
 */
template <typename K, typename V>
DataBuffer& operator<<(DataBuffer& buffer, const std::map<K, V>& data) {
	buffer << VarInt{data.size()};
	for (const auto& [key, value] : data) {
		buffer << key << value;
	}
	return buffer;
}

/**
 * \brief Append a map to the buffer by first writing the size
 * \param data The map to append
 */
template <typename K, typename V>
DataBuffer& operator<<(DataBuffer& buffer, const std::unordered_map<K, V>& data) {
	buffer << VarInt{data.size()};
	for (const auto& [key, value] : data) {
		buffer << key << value;
	}
	return buffer;
}

/**
 * \brief Append a pair to the buffer
 * \param data The pair to append
 */
template <typename K, typename V>
DataBuffer& operator<<(DataBuffer& buffer, const std::pair<K, V>& data) {
	return buffer << data.first << data.second;
}

/**
 * \brief Append an array to the buffer by first writing the size
 * \param data The buffer to append
 */
template <typename T, std::size_t Size>
DataBuffer& operator<<(DataBuffer& buffer, const std::array<T, Size>& data) {
	for (const auto& element : data) {
		buffer << element;
	}
	return buffer;
}

/**
 * \brief Read a pointer
 */
template <typename T, typename = typename std::enable_if_t<!std::is_abstract_v<T>>>
DataBuffer& operator>>(DataBuffer& buffer, std::shared_ptr<T>& data) {
	data = std::make_shared<T>();
	return buffer >> *data;
}

/**
 * \brief Read a pointer
 */
template <typename T, typename = typename std::enable_if_t<!std::is_abstract_v<T>>>
DataBuffer& operator>>(DataBuffer& buffer, std::unique_ptr<T>& data) {
	data = std::make_unique<T>();
	return buffer >> *data;
}

/**
 * \brief Read a vector (size + data) from the buffer
 * \pre The vector is assumed to be empty
 */
template <typename T>
DataBuffer& operator>>(DataBuffer& buffer, std::vector<T>& data) {
	VarInt arraySize;
	buffer >> arraySize;
	for (std::size_t i = 0; i < arraySize.GetValue(); i++) {
		T newElement;
		buffer >> newElement;
		data.push_back(newElement);
	}
	return buffer;
}

/**
 * \brief Read a list (size + data) from the buffer
 * \pre The list is assumed to be empty
 */
template <typename T>
DataBuffer& operator>>(DataBuffer& buffer, std::list<T>& data) {
	VarInt arraySize;
	buffer >> arraySize;
	for (std::size_t i = 0; i < arraySize.GetValue(); i++) {
		T newElement;
		buffer >> newElement;
		data.push_back(newElement);
	}
	return buffer;
}

/**
 * \brief Read a map (size + data) from the buffer
 * \pre The map is assumed to be empty
 */
template <typename K, typename V>
DataBuffer& operator>>(DataBuffer& buffer, std::map<K, V>& data) {
	VarInt mapSize;
	buffer >> mapSize;
	for (std::size_t i = 0; i < mapSize.GetValue(); i++) {
		K newKey;
		V newValue;
		buffer >> newKey >> newValue;
		data.emplace(newKey, newValue);
	}
	return buffer;
}

/**
 * \brief Read a map (size + data) from the buffer
 * \pre The map is assumed to be empty
 */
template <typename K, typename V>
DataBuffer& operator>>(DataBuffer& buffer, std::unordered_map<K, V>& data) {
	VarInt mapSize;
	buffer >> mapSize;
	for (std::size_t i = 0; i < mapSize.GetValue(); i++) {
		K newKey;
		V newValue;
		buffer >> newKey >> newValue;
		data.emplace(newKey, newValue);
	}
	return buffer;
}

/**
 * \brief Read a pair
 */
template <typename K, typename V>
DataBuffer& operator>>(DataBuffer& buffer, std::pair<K, V>& data) {
	return buffer >> data.first >> data.second;
}

/**
 * \brief Read an array from the buffer
 */
template <std::size_t Size, typename T>
DataBuffer& operator>>(DataBuffer& buffer, std::array<T, Size>& data) {
	for (std::size_t i = 0; i < Size; i++) {
		T newElement;
		buffer >> newElement;
		data[i] = newElement;
	}
	return buffer;
}

}  // namespace sp