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package fi.evolver.ai.vaadin.view;

import java.io.Serial;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;

import com.vaadin.flow.component.UI;
import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.dependency.Uses;
import com.vaadin.flow.component.html.Hr;
import com.vaadin.flow.component.icon.Icon;
import com.vaadin.flow.component.icon.VaadinIcon;
import com.vaadin.flow.component.orderedlayout.FlexComponent;
import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.component.select.Select;
import com.vaadin.flow.i18n.I18NProvider;
import com.vaadin.flow.server.VaadinServletRequest;
import com.vaadin.flow.theme.lumo.LumoUtility;

import fi.evolver.ai.vaadin.UserProfileRepository;
import fi.evolver.ai.vaadin.component.ComponentSource;
import fi.evolver.ai.vaadin.entity.UserProfile;
import fi.evolver.ai.vaadin.translations.PageTitleTranslationKey;
import fi.evolver.utils.string.StringUtils;
import jakarta.annotation.PostConstruct;
import jakarta.annotation.security.PermitAll;

@Uses(Icon.class)
@Uses(Select.class)
@PermitAll
@PageTitleTranslationKey("nav.profile")
public class ProfileView extends VerticalLayout {
	@Serial
	private static final long serialVersionUID = 1L;

	@Autowired(required = false)
	private List> additionalComponents = new ArrayList<>();

	private final UserProfileRepository userProfileRepository;
	private final I18NProvider I18nProvider;

	private final Select languageSelect = new Select();
	private final HorizontalLayout endSection = new HorizontalLayout();

	@Autowired
	public ProfileView(
			UserProfileRepository userProfileRepository,
			I18NProvider I18nProvider) {
		this.userProfileRepository = userProfileRepository;
		this.I18nProvider = I18nProvider;
		setAlignItems(FlexComponent.Alignment.START);
		setSpacing(true);
	}

	@PostConstruct
	private void setup() {
		additionalComponents.stream()
				.sorted()
				.map(ComponentSource::getComponent)
				.forEach(this::add);

		if (I18nProvider != null)
			createLanguageSelect();
		createLogoutSection();
		createEndSection();
	}

	private void createEndSection() {
		endSection.setPadding(false);
		endSection.setWidthFull();
		endSection.addClassNames(LumoUtility.AlignItems.END, LumoUtility.JustifyContent.BETWEEN);
		add(new Hr());
		add(endSection);
	}

	private void createLogoutSection() {
		Button logoutButton = new Button(getTranslation("common.logout"), VaadinIcon.SIGN_OUT.create(), click -> {
			UI.getCurrent().getPage().setLocation("/login");
			SecurityContextLogoutHandler logoutHandler = new SecurityContextLogoutHandler();
			logoutHandler.logout(VaadinServletRequest.getCurrent().getHttpServletRequest(), null, null);
		});

		endSection.add(logoutButton);
	}

	private void createLanguageSelect() {
		List availableLocales = I18nProvider.getProvidedLocales();

		final List cleanedLocaled = availableLocales.stream().map(l -> {
			if (l.equals(Locale.ROOT))
				return Locale.ENGLISH;
			return l;
		}).toList();

		availableLocales = cleanedLocaled.stream().filter(l -> {
			if (StringUtils.isNullOrEmpty(l.getCountry()))
				return cleanedLocaled.stream().noneMatch(
						x -> x.getLanguage().equals(l.getLanguage()) && StringUtils.hasText(x.getCountry()));
			return true;
		}).distinct().toList();

		languageSelect.setLabel(getTranslation("profile.languageSelect"));
		languageSelect.setItemLabelGenerator(l -> l.getDisplayName(Locale.ROOT));
		languageSelect.setItems(availableLocales);
		languageSelect.setValue(availableLocales.stream()
				.filter(l -> l.getLanguage().equals(getLocale().getLanguage()))
				.findFirst().orElse(getLocale()));
		languageSelect.addValueChangeListener(valueChangeEvent -> {
			Locale value = valueChangeEvent.getValue();
			if (value == null)
				return;
			UserProfile user = userProfileRepository.findOrCreateUserProfile();
			user.setLanguage(value.toLanguageTag());
			userProfileRepository.save(user);
			UI.getCurrent().getPage().reload();
		});
		endSection.add(languageSelect);
	}

}