package eu.old.eudat.migration;

import eu.eudat.commons.enums.ContactInfoType;
import eu.eudat.data.UserContactInfoEntity;
import eu.old.eudat.data.dao.entities.UserInfoDao;
import eu.old.eudat.data.entities.Credential;
import eu.old.eudat.data.entities.UserInfo;
import eu.old.eudat.logic.services.operations.DatabaseRepository;
import gr.cite.tools.logging.LoggerService;
import jakarta.persistence.EntityManager;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.UUID;

@Service
public class UserContactInfoMigrationService {
	private static final LoggerService logger = new LoggerService(LoggerFactory.getLogger(UserContactInfoMigrationService.class));

	private static final int PageSize = 500;
	private static final boolean TestMode = false;
	private final DatabaseRepository databaseRepository;
	private final EntityManager entityManager;
	public UserContactInfoMigrationService(DatabaseRepository databaseRepository, EntityManager entityManager) {
		this.databaseRepository = databaseRepository;
		this.entityManager = entityManager;
	}
	
	public void migrate(){
		UserInfoDao userInfoDao = databaseRepository.getUserInfoDao();
		long total = userInfoDao.asQueryable().count();
		logger.debug("Migrate Contacts Total : " + total);
		int page = 0;

		List<UserInfo> items;
		do {
			items = userInfoDao.asQueryable().orderBy((builder, root) -> builder.asc(root.get("created"))).orderBy((builder, root) -> builder.asc(root.get("id"))).skip(page * PageSize).take(PageSize).toList();
			if (items != null && !items.isEmpty()) {
				logger.debug("Migrate Contacts " + page * PageSize + " of " + total);
				for (UserInfo item : items) {
//					entityManager.detach(item);
					if (!item.getUserStatus().equals((short)0)) continue;
					List<String> emails = new ArrayList<>();
					if (item.getEmail() != null && !item.getEmail().isBlank()) emails.add(item.getEmail().toLowerCase(Locale.ROOT));
					for (Credential credential: item.getCredentials()) {
						if (credential.getStatus().equals(0) || credential.getEmail() == null || credential.getEmail().isBlank()) continue;
						if (emails.stream().noneMatch(x-> x.equals(credential.getEmail().toLowerCase(Locale.ROOT)))) 
							emails.add(credential.getEmail().toLowerCase(Locale.ROOT));
					}

					int i = 0;
					for (String email: emails) {
						UserContactInfoEntity data = new UserContactInfoEntity();
						data.setId(UUID.randomUUID());
						data.setType(ContactInfoType.Email);
						data.setValue(email);
						data.setUserId(item.getId());
						data.setCreatedAt(item.getCreated().toInstant());
						data.setOrdinal(i);
						i++;
						this.entityManager.persist(data);
					}
				}
				this.entityManager.flush();
				
				page++;
			}
		} while (items != null && !items.isEmpty() && !TestMode);
	}
}