package at.gv.egiz.eaaf.modules.pvp2.impl.verification;

import java.util.ArrayList;
import java.util.List;

import org.opensaml.messaging.context.MessageContext;
import org.opensaml.messaging.handler.MessageHandler;
import org.opensaml.messaging.handler.MessageHandlerChain;
import org.opensaml.messaging.handler.MessageHandlerException;

import lombok.extern.slf4j.Slf4j;
import net.shibboleth.shared.component.ComponentInitializationException;


@Slf4j
public class PvpSamlMessageHandlerChain implements MessageHandlerChain {
  private final List<MessageHandler> handlers = new ArrayList<>();
  private boolean isInitialized = false;

  @Override
  public void invoke(MessageContext messageContext) throws MessageHandlerException {
    if (!isInitialized) {
      throw new RuntimeException("Component: "
          + PvpSamlMessageHandlerChain.class.getName() + " not initialized");

    }

    for (final MessageHandler handler : getHandlers()) {
      log.trace("Initializing SAML message handler: {}", handler.getClass().getName());
      handler.invoke(messageContext);

    }
  }

  @Override
  public boolean isInitialized() {
    return isInitialized;

  }

  @Override
  public void initialize() throws ComponentInitializationException {
    if (!isInitialized) {
      for (final MessageHandler handler : getHandlers()) {
        log.trace("Initializing SAML message handler: {}", handler.getClass().getName());
        handler.initialize();

      }

      isInitialized = true;
    }

  }

  @Override
  public List<MessageHandler> getHandlers() {
    return handlers;

  }

  public void addHandler(MessageHandler handler) {
    handlers.add(handler);

  }

  public void addHandlers(List<MessageHandler> handlerList) {
    handlers.addAll(handlerList);

  }

}