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package fi.evolver.ai.vaadin.view;

import java.io.Serial;
import java.util.List;
import java.util.Optional;

import com.vaadin.flow.component.Component;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.router.BeforeEnterEvent;
import com.vaadin.flow.router.BeforeEnterObserver;
import com.vaadin.flow.router.BeforeEvent;
import com.vaadin.flow.router.Location;
import com.vaadin.flow.router.QueryParameters;
import com.vaadin.flow.theme.lumo.LumoUtility;

import jakarta.annotation.PostConstruct;

public abstract class ChatHistoryAwareView extends VerticalLayout implements BeforeEnterObserver {
	@Serial
	private static final long serialVersionUID = 1L;

	@PostConstruct
	public void init() {
		addClassName(LumoUtility.Overflow.HIDDEN);

		if (isFullSize())
			setSizeFull();

		getPreChatComponent().ifPresent(this::add);
		add((Component)(getChatComponent()));
	}

	@Override
	public void beforeEnter(BeforeEnterEvent event) {
		startChatIfExists(event);
	}

	public void startChatIfExists(BeforeEvent event) {
		Location location = event.getLocation();
		QueryParameters queryParameters = location.getQueryParameters();
		List chatIdParams = queryParameters.getParameters().get("chatId");
		if (chatIdParams != null && !chatIdParams.isEmpty())
			getChatComponent().startChatWithHistory(chatIdParams.get(0));
	}

	public Optional getPreChatComponent() {
		return Optional.empty();
	}

	public abstract HistoryAwareChat getChatComponent();

	public boolean isFullSize() {
		return true;
	}

}