package app.navigation.player.components.button;

import app.data.entity.Player;
import app.navigation.player.PlayerNavigation;
import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.icon.VaadinIcon;

import java.util.List;
import java.util.Optional;

public class PrevPlayerButton extends Button {

    private final PlayerNavigation playerNavigation;

    public PrevPlayerButton(PlayerNavigation playerNavigation) {
        this.playerNavigation = playerNavigation;

        setIcon(VaadinIcon.ARROW_LEFT.create());

        playerNavigation.addRunnableToBeRunAfterSelection(this::configure);
    }

    private void configure() {
        Optional<Player> prevPlayer = getPrevPlayer();
        setEnabled(prevPlayer.isPresent());
        addClickListener(event -> prevPlayer.ifPresent(player -> playerNavigation.getPlayerSelect().setValue(player)));
    }

    private Optional<Player> getPrevPlayer() {
        int index = PlayerButtonUtils.getPlayerIndex(playerNavigation);

        if (index < 0) return Optional.empty();

        List<Player> playerList = playerNavigation.getPlayerList();
        return Optional.ofNullable(playerList.get((index - 1) % playerList.size()));
    }
}