package eu.eudat.models.rda.mapper;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import eu.eudat.models.rda.Metadatum;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.Iterator;

public class MetadataRDAMapper {
	private static final Logger logger = LoggerFactory.getLogger(MetadataRDAMapper.class);

	public static Metadatum toRDA(JsonNode structure, JsonNode properties) {
		Metadatum rda = new Metadatum();
		JsonNode dataNode = null;
		String rdaProperty = structure.get("rdaProperty").asText();
		if (rdaProperty.contains("metadata_standard_id")) {
			try {
				String jsonText = properties.get(structure.get("id").asText()).asText();
				if (jsonText != null && !jsonText.isEmpty()) {
					dataNode = new ObjectMapper().readTree(jsonText);
					for (Iterator<JsonNode> it = dataNode.elements(); it.hasNext(); ) {
						JsonNode data = it.next();
						if (data.get("uri") != null) {
							rda.setMetadataStandardId(MetadataStandardIdRDAMapper.toRDA(data.get("uri").asText()));
						}
					}
				}
			} catch (IOException e) {
				logger.error(e.getMessage(), e);
			}
		} else if (rdaProperty.contains("description")) {
			rda.setDescription(properties.get(structure.get("id").asText()).asText());
		} else if (rdaProperty.contains("language")) {
			String language = properties.get(structure.get("id").asText()).asText();
			Metadatum.Language lang = Metadatum.Language.fromValue(language);
			rda.setLanguage(lang);
		}

		return rda;
	}
}