#include "Configuration.h"

	std::wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.

	void process(std::istream& input, std::ostream& output, Configuration& configuration) {

		std::shared_ptr<RelationalWriter> writer(Factory::create(output));

		xmlpp::Element* root = parser.get_document()->get_root_node();

		xmlpp::Node::PrefixNsMap ns;

		for (int i = 0; i < configuration.namespaceMappings.size(); i++) {

			std::string prefix = convertor.to_bytes(configuration.namespaceMappings[i]);

			std::string uri = convertor.to_bytes(configuration.namespaceMappings[++i]);

			ns[prefix] = uri;

		for (const RelationConfiguration& r : configuration.relationConfigurations) {

			std::vector<relpipe::writer::AttributeMetadata> attributesMetadata;

			for (AttributeRecipe a : r.attributes) attributesMetadata.push_back(AttributeMetadata{a.name, a.type});

			relpipe::writer::string_t name = r.nameIsXPath ? convertor.from_bytes(root->eval_to_string(convertor.to_bytes(r.relation), ns)) : r.relation;

			writer->startRelation(name, attributesMetadata, true);

			for (xmlpp::Node* n : root->find(convertor.to_bytes(r.xpath), ns)) {

				for (AttributeRecipe a : r.attributes) {

					// TODO: convert to bytes only once

					writer->writeAttribute(convertor.from_bytes(n->eval_to_string(convertor.to_bytes(a.xpath), ns)));

				}

			}

		}