#include <format>
#include <larra/stream.hpp>

namespace {

inline auto ToOptionalString(const xmlpp::Attribute* attribute) -> std::optional<std::string> {
  return attribute ? std::optional{std::string{attribute->get_value()}} : std::nullopt;
}

template <bool IsJid>
inline auto ToOptionalUser(const xmlpp::Attribute* attribute) {
  if constexpr(IsJid) {
    return attribute ? std::optional{larra::xmpp::BareJid::Parse(attribute->get_value())} : std::nullopt;
  } else {
    return ToOptionalString(attribute);
  }
}

auto ToString(std::string data) -> std::string {
  return std::move(data);
};

}  // namespace

namespace larra::xmpp {

template <bool JidFrom, bool JidTo>
auto impl::BasicStream<JidFrom, JidTo>::SerializeStream(xmlpp::Element* node) const -> void {
  if(this->from) {
    node->set_attribute("from", ToString(*this->from));
  }
  if(this->to) {
    node->set_attribute("to", ToString(*this->to));
  }
  if(this->id) {
    node->set_attribute("id", *this->id);
  }
  if(this->version) {
    node->set_attribute("version", *this->version);
  }
  if(this->xmlLang) {
    node->set_attribute("lang", *this->xmlLang, "xml");
  }
  node->set_namespace_declaration("http://etherx.jabber.org/streams", "stream");
}

template auto ServerStream::SerializeStream(xmlpp::Element* node) const -> void;
template auto ServerToUserStream::SerializeStream(xmlpp::Element* node) const -> void;
template auto UserStream::SerializeStream(xmlpp::Element* node) const -> void;

template <bool JidFrom, bool JidTo>
auto impl::BasicStream<JidFrom, JidTo>::Parse(const xmlpp::Element* node) -> impl::BasicStream<JidFrom, JidTo> {
  return {ToOptionalUser<JidFrom>(node->get_attribute("from")),
          ToOptionalUser<JidTo>(node->get_attribute("to")),
          ToOptionalString(node->get_attribute("id")),
          ToOptionalString(node->get_attribute("version")),
          ToOptionalString(node->get_attribute("lang", "xml"))};
}
template auto UserStream::Parse(const xmlpp::Element* node) -> UserStream;

template auto ServerStream::Parse(const xmlpp::Element* node) -> ServerStream;
template auto ServerToUserStream::Parse(const xmlpp::Element* node) -> ServerToUserStream;

}  // namespace larra::xmpp