package eu.eudat.models.rda.mapper;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import eu.eudat.data.entities.DatasetProfile;
import eu.eudat.elastic.criteria.DatasetCriteria;
import eu.eudat.elastic.entities.Tag;
import eu.eudat.logic.managers.DatasetManager;
import eu.eudat.logic.services.ApiContext;
import eu.eudat.logic.utilities.helpers.StreamDistinctBy;
import eu.eudat.logic.utilities.json.JsonSearcher;
import eu.eudat.models.data.datasetprofile.DatasetProfileOverviewModel;
import eu.eudat.models.data.datasetwizard.DatasetWizardModel;
import eu.eudat.models.rda.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.transaction.Transactional;
import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

@Component
public class DatasetRDAMapper {
	private static final Logger logger = LoggerFactory.getLogger(DatasetRDAMapper.class);

	private DatasetManager datasetManager;
	private ApiContext apiContext;

	@Autowired
	public DatasetRDAMapper(DatasetManager datasetManager, ApiContext apiContext) {
		this.datasetManager = datasetManager;
		this.apiContext = apiContext;
	}

	@Transactional
	public Dataset toRDA(eu.eudat.data.entities.Dataset dataset, eu.eudat.models.rda.Dmp dmp) {
		Dataset rda = new Dataset();
//		rda.setDatasetId(DatasetIdRDAMapper.toRDA(dataset.getId()));
		if (dataset.getLabel() == null) {
			throw new IllegalArgumentException("Dataset Label is missing");
		}
		rda.setTitle(dataset.getLabel());
		rda.setDescription(dataset.getDescription());
		rda.setAdditionalProperty("template", dataset.getProfile().getId());
		try {
			Map<String, Object> templateIdsToValues = apiContext.getUtilitiesService().getGenericObjectMapper().readValue(dataset.getProperties(), LinkedHashMap.class);
			DatasetWizardModel datasetWizardModel = new DatasetWizardModel().fromDataModel(dataset);
			datasetWizardModel.setDatasetProfileDefinition(datasetManager.getPagedProfile(datasetWizardModel, dataset));
			ObjectMapper mapper = new ObjectMapper();
			String datasetDescriptionJson = mapper.writeValueAsString(datasetWizardModel.getDatasetProfileDefinition());
			JsonNode datasetDescriptionObj = mapper.readTree(datasetDescriptionJson);
			List<JsonNode> idNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.dataset_id");
			if (!idNodes.isEmpty()) {
				rda.setDatasetId(DatasetIdRDAMapper.toRDA(idNodes));
			}
			if (rda.getDatasetId() == null) {
				rda.setDatasetId(new DatasetId(dataset.getId().toString(), DatasetId.Type.OTHER));
			}
			List<JsonNode> typeNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.type");
			if (!typeNodes.isEmpty() && !typeNodes.get(0).get("value").asText().isEmpty()) {
				rda.setType(typeNodes.get(0).get("value").asText());
			} else {
				rda.setType("DMP Dataset");
			}
			List<JsonNode> languageNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.language");
			if (!languageNodes.isEmpty() && !languageNodes.get(0).get("value").asText().isEmpty()) {
				rda.setLanguage(Language.fromValue(languageNodes.get(0).get("value").asText()));
			} else {
				rda.setLanguage(LanguageRDAMapper.mapLanguageIsoToRDAIso(dataset.getProfile().getLanguage()));
			}
			List<JsonNode> metadataNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.metadata");
			if (!metadataNodes.isEmpty()) {
				rda.setMetadata(MetadataRDAMapper.toRDAList(metadataNodes));
			}else{
				rda.setMetadata(new ArrayList<>());
			}
			List<JsonNode> qaNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.data_quality_assurance");
			if (!qaNodes.isEmpty()) {
				/*rda.setDataQualityAssurance(qaNodes.stream().map(qaNode -> qaNode.get("value").asText()).collect(Collectors.toList()));
				for (int i = 0; i < qaNodes.size(); i++) {
					rda.setAdditionalProperty("qaId" + (i + 1),  qaNodes.get(i).get("id").asText());
				}*/
				List<String> qaList = new ArrayList<>();
				String qa;
				for(JsonNode node: qaNodes){
					if(node.get("value").isArray()){
						Iterator<JsonNode> iter = node.get("value").elements();
						while(iter.hasNext()) {
							qa = iter.next().asText();
							qaList.add(qa);
						}
					}
				}
				String data_quality;
				for(JsonNode dqa: qaNodes){
					data_quality = dqa.get("value").asText();
					if(!data_quality.isEmpty()){
						qaList.add(data_quality);
						rda.setAdditionalProperty("otherDQAID", dqa.get("id"));
						rda.setAdditionalProperty("otherDQA", data_quality);
						break;
					}
				}
				rda.setDataQualityAssurance(qaList);
			}else{
				rda.setDataQualityAssurance(new ArrayList<>());
			}
			List<JsonNode> preservationNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.preservation_statement");
			if (!preservationNodes.isEmpty() && !preservationNodes.get(0).get("value").asText().isEmpty()) {
				rda.setPreservationStatement(preservationNodes.get(0).get("value").asText());
			}
			List<JsonNode> distributionNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.distribution");
			if (!distributionNodes.isEmpty()) {
				rda.setDistribution(DistributionRDAMapper.toRDAList(distributionNodes));
			}else{
				rda.setDistribution(new ArrayList<>());
			}
			List<JsonNode> keywordNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.keyword");
			if (!keywordNodes.isEmpty()) {
				rda.setKeyword(keywordNodes.stream().map(keywordNode -> {
					JsonNode value = keywordNode.get("value");
					if (value.isArray()) {
						return StreamSupport.stream(value.spliterator(), false).map(node -> KeywordRDAMapper.toRDA(node.toString())).flatMap(Collection::stream).collect(Collectors.toList());
					} else {
						return KeywordRDAMapper.toRDA(keywordNode.get("value").asText());
					}
				}).flatMap(Collection::stream).collect(Collectors.toList()));
				for (int i = 0; i < keywordNodes.size(); i++) {
					rda.setAdditionalProperty("keyword" + (i + 1),  keywordNodes.get(i).get("id").asText());
				}
			} else if (apiContext.getOperationsContext().getElasticRepository().getDatasetRepository().exists()) {
				List<String> tags = apiContext.getOperationsContext().getElasticRepository().getDatasetRepository().findDocument(dataset.getId().toString()).getTags().stream().map(Tag::getName).collect(Collectors.toList());
				rda.setKeyword(tags);
			}
			List<JsonNode> personalDataNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.personal_data");
			if (!personalDataNodes.isEmpty()) {
				try{
					rda.setPersonalData(personalDataNodes.stream().map(personalDataNode -> Dataset.PersonalData.fromValue(personalDataNode.get("value").asText())).findFirst().get());
				}catch(IllegalArgumentException e){
					rda.setPersonalData(Dataset.PersonalData.UNKNOWN);
				}
			} else {
				rda.setPersonalData(Dataset.PersonalData.UNKNOWN);
			}
			List<JsonNode> securityAndPrivacyNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.security_and_privacy");
			if (!securityAndPrivacyNodes.isEmpty()) {
				rda.setSecurityAndPrivacy(SecurityAndPrivacyRDAMapper.toRDAList(securityAndPrivacyNodes));
			}else{
				rda.setSecurityAndPrivacy(new ArrayList<>());
			}
			List<JsonNode> sensitiveDataNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.sensitive_data");
			if (!sensitiveDataNodes.isEmpty()) {
				try{
					rda.setSensitiveData(sensitiveDataNodes.stream().map(sensitiveDataNode -> Dataset.SensitiveData.fromValue(sensitiveDataNode.get("value").asText())).findFirst().get());
				}catch(IllegalArgumentException e){
					rda.setSensitiveData(Dataset.SensitiveData.UNKNOWN);
				}
			} else {
				rda.setSensitiveData(Dataset.SensitiveData.UNKNOWN);
			}
			List<JsonNode> technicalResourceNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.technical_resource");
			if (!technicalResourceNodes.isEmpty()) {
				rda.setTechnicalResource(TechnicalResourceRDAMapper.toRDAList(technicalResourceNodes));
			}else{
				rda.setTechnicalResource(new ArrayList<>());
			}
			List<JsonNode> issuedNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.issued");
			if (!issuedNodes.isEmpty() && !issuedNodes.get(0).get("value").asText().isEmpty()) {
				rda.setIssued(issuedNodes.get(0).get("value").asText());
			}
			List<JsonNode> contributorNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dmp.contributor");
			if (!contributorNodes.isEmpty()) {
				dmp.getContributor().addAll(contributorNodes.stream().map(contributorNode -> {
					JsonNode value = contributorNode.get("value");
					if (value.isArray()) {
						return StreamSupport.stream(value.spliterator(), false).map(node -> ContributorRDAMapper.toRDA(node.asText())).collect(Collectors.toList());
					} else {
						return Collections.singletonList(new Contributor()); // return null kalutera
					}
				}).flatMap(Collection::stream).collect(Collectors.toList()));
			}
			List<JsonNode> costNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dmp.cost");
			if (!costNodes.isEmpty()) {
				dmp.getCost().addAll(CostRDAMapper.toRDAList(costNodes));
			}
			List<JsonNode> ethicsNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dmp.ethical_issues");
			if (!ethicsNodes.isEmpty()) {
				for(JsonNode node: ethicsNodes){
					String rdaProperty = node.get("rdaProperty").asText();
					String rdaValue = node.get("value").asText();
					if(rdaValue == null || rdaValue.isEmpty()){
						continue;
					}
					if(rdaProperty.contains("exist")){
						try {
							Dmp.EthicalIssuesExist exists = dmp.getEthicalIssuesExist();
							if(exists == null
							   || ((exists == Dmp.EthicalIssuesExist.NO || exists == Dmp.EthicalIssuesExist.UNKNOWN) && rdaValue.equals("yes"))
							   || (exists == Dmp.EthicalIssuesExist.YES && !(rdaValue.equals("no") || rdaValue.equals("unknown")))
							   || (exists == Dmp.EthicalIssuesExist.UNKNOWN && rdaValue.equals("no"))){
								dmp.setEthicalIssuesExist(Dmp.EthicalIssuesExist.fromValue(rdaValue));
							}
						}catch(IllegalArgumentException e){
							logger.warn(e.getLocalizedMessage() + ". Setting ethical_issues_exist to unknown");
							dmp.setEthicalIssuesExist(Dmp.EthicalIssuesExist.UNKNOWN);
						}
					}
//					else if(rdaProperty.contains("description")){
//						if(dmp.getEthicalIssuesDescription() == null){
//							dmp.setEthicalIssuesDescription(rdaValue);
//						}
//						else{
//							dmp.setEthicalIssuesDescription(dmp.getEthicalIssuesDescription() + ", " + rdaValue);
//						}
//					}
//					else if(rdaProperty.contains("report")){
//						try {
//							dmp.setEthicalIssuesReport(URI.create(rdaValue));
//						} catch (IllegalArgumentException e) {
//							logger.warn(e.getLocalizedMessage() + ". Skipping url parsing");
//						}
//					}
				}
			}
			List<JsonNode> foundNodes = Stream.of(typeNodes, languageNodes, metadataNodes, qaNodes, preservationNodes, distributionNodes,
					keywordNodes, personalDataNodes, securityAndPrivacyNodes, sensitiveDataNodes, technicalResourceNodes).flatMap(Collection::stream).collect(Collectors.toList());
			templateIdsToValues.entrySet().forEach(entry -> {
				boolean isFound = foundNodes.stream().anyMatch(node -> node.get("id").asText().equals(entry.getKey()));
				if (!isFound && entry.getValue() != null && !entry.getValue().toString().isEmpty()) {
					try {
						Instant time = Instant.parse(entry.getValue().toString());
						rda.setAdditionalProperty(entry.getKey(), DateTimeFormatter.ofPattern("yyyy-MM-dd").withZone(ZoneId.systemDefault()).format(time));
					} catch (DateTimeParseException e) {
						rda.setAdditionalProperty(entry.getKey(), entry.getValue());
					}
				}
			});


		} catch (Exception e) {
			logger.error(e.getMessage(), e);
		}


		return rda;
	}


	public eu.eudat.data.entities.Dataset toEntity(Dataset rda, DatasetProfile defaultProfile) {
		eu.eudat.data.entities.Dataset entity = new eu.eudat.data.entities.Dataset();
		entity.setLabel(rda.getTitle());
		entity.setDescription(rda.getDescription());
		try {
			DatasetProfile profile = apiContext.getOperationsContext().getDatabaseRepository().getDatasetProfileDao().find(UUID.fromString(rda.getAdditionalProperties().get("template").toString()));
			entity.setProfile(profile);
		}catch(Exception e) {
			logger.warn(e.getMessage(), e);
			entity.setProfile(defaultProfile);
		}
		try {
			Map<String, Object> properties = new HashMap<>();
			DatasetWizardModel datasetWizardModel = new DatasetWizardModel();
			datasetWizardModel.setProfile(new DatasetProfileOverviewModel().fromDataModel(entity.getProfile()));
			datasetWizardModel.setDatasetProfileDefinition(datasetManager.getPagedProfile(datasetWizardModel, entity));
			ObjectMapper mapper = new ObjectMapper();
			String datasetDescriptionJson = mapper.writeValueAsString(datasetWizardModel.getDatasetProfileDefinition());
			JsonNode datasetDescriptionObj = mapper.readTree(datasetDescriptionJson);

			List<JsonNode> typeNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.type");
			if (!typeNodes.isEmpty()) {
				properties.put(typeNodes.get(0).get("id").asText(), rda.getType());
			}

			List<JsonNode> languageNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.language");
			if (!languageNodes.isEmpty() && rda.getLanguage() != null) {
				properties.put(languageNodes.get(0).get("id").asText(), rda.getLanguage().value());
			}

			if (rda.getMetadata() != null) {
				properties.putAll(MetadataRDAMapper.toProperties(rda.getMetadata()));
			}

			if (rda.getDatasetId() != null) {
				properties.putAll(DatasetIdRDAMapper.toProperties(rda.getDatasetId(), datasetDescriptionObj));
			}

			/*List <String> qaIds = rda.getAdditionalProperties().entrySet().stream().filter(entry -> entry.getKey().startsWith("qaId")).map(entry -> entry.getValue().toString()).collect(Collectors.toList());
			for (int i = 0; i < qaIds.size(); i++) {
				properties.put(qaIds.get(i), rda.getDataQualityAssurance().get(i));
			}*/
			List<JsonNode> qaNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.data_quality_assurance");
			if (!qaNodes.isEmpty() && rda.getDataQualityAssurance() != null && !rda.getDataQualityAssurance().isEmpty()) {
				ObjectMapper m = new ObjectMapper();
				List<String> qas = new ArrayList<>(rda.getDataQualityAssurance());
				if(!qas.isEmpty()){
					properties.put(qaNodes.get(0).get("id").asText(), m.writeValueAsString(qas));
					if(rda.getAdditionalProperties().containsKey("otherDQAID")){
						properties.put((String)rda.getAdditionalProperties().get("otherDQAID"), rda.getAdditionalProperties().get("otherDQA"));
					}
				}
			}

			List<JsonNode> preservationNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.preservation_statement");
			if (!preservationNodes.isEmpty()) {
				properties.put(preservationNodes.get(0).get("id").asText(), rda.getPreservationStatement());
			}

			List<JsonNode> issuedNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.issued");
			if (!issuedNodes.isEmpty()) {
				properties.put(issuedNodes.get(0).get("id").asText(), rda.getIssued());
			}

			if (rda.getDistribution() != null && !rda.getDistribution().isEmpty()) {
				properties.putAll(DistributionRDAMapper.toProperties(rda.getDistribution().get(0), datasetDescriptionObj));
			}

			if (rda.getKeyword() != null) {
				List<String> keywordIds = rda.getAdditionalProperties().entrySet().stream().filter(entry -> entry.getKey().startsWith("keyword")).map(entry -> entry.getValue().toString()).collect(Collectors.toList());
//				boolean takeAll = false;
//				if (keywordIds.size() < rda.getKeyword().size()) {
//					takeAll = true;
//				}
				DatasetCriteria criteria = new DatasetCriteria();
				criteria.setHasTags(true);
				List<Tag> tags = this.apiContext.getOperationsContext().getElasticRepository().getDatasetRepository().query(criteria).stream().map(eu.eudat.elastic.entities.Dataset::getTags).flatMap(Collection::stream).filter(StreamDistinctBy.distinctByKey(Tag::getId)).collect(Collectors.toList());
				if(!rda.getKeyword().isEmpty()){
					List<Tag> templateTags = tags.stream().filter(tag -> rda.getKeyword().contains(tag.getName())).collect(Collectors.toList());
					properties.put(keywordIds.get(0), mapper.writeValueAsString(templateTags));
//					for (int i = 0; i < keywordIds.size(); i++) {
//						//if (takeAll) {
//							List<String> tags = new ArrayList<>();
//							for (String keyword : rda.getKeyword()) {
//								tags.add(mapper.writeValueAsString(toTagEntity(keyword)));
//							}
//							properties.put(keywordIds.get(i), tags);
//						} else {
//							properties.put(keywordIds.get(i), mapper.writeValueAsString(toTagEntity(rda.getKeyword().get(i))));
//						}
//						properties.put(keywordIds.get(i), rda.getKeyword().get(i));
//					}
				}
			}

			List<JsonNode> personalDataNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.personal_data");
			if (!personalDataNodes.isEmpty()) {
				properties.put(personalDataNodes.get(0).get("id").asText(), rda.getPersonalData().value());
			}

			if (rda.getSecurityAndPrivacy() != null) {
				properties.putAll(SecurityAndPrivacyRDAMapper.toProperties(rda.getSecurityAndPrivacy()));
			}

			List<JsonNode> sensitiveDataNodes = JsonSearcher.findNodes(datasetDescriptionObj, "rdaProperty", "dataset.sensitive_data");
			if (!sensitiveDataNodes.isEmpty()) {
				properties.put(sensitiveDataNodes.get(0).get("id").asText(), rda.getSensitiveData().value());
			}

			if (rda.getTechnicalResource() != null) {
				properties.putAll(TechnicalResourceRDAMapper.toProperties(rda.getTechnicalResource()));
			}

			rda.getAdditionalProperties().entrySet().stream()
			   .filter(entry -> !entry.getKey().equals("template") && !entry.getKey().startsWith("qaId") && !entry.getKey().startsWith("keyword"))
			   .forEach(entry -> properties.put(entry.getKey(), entry.getValue()));
			entity.setProperties(new ObjectMapper().writeValueAsString(properties));
		} catch (Exception e) {
			logger.error(e.getMessage(), e);
		}


		return entity;
	}

	private static Tag toTagEntity(String name) {
		Tag tag = new Tag();
		tag.setId("");
		tag.setName(name);
		return tag;
	}
}