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package org.glassfish.weld.services;

import static jakarta.transaction.Status.STATUS_ACTIVE;
import static jakarta.transaction.Status.STATUS_COMMITTING;
import static jakarta.transaction.Status.STATUS_MARKED_ROLLBACK;
import static jakarta.transaction.Status.STATUS_PREPARED;
import static jakarta.transaction.Status.STATUS_PREPARING;
import static jakarta.transaction.Status.STATUS_ROLLING_BACK;
import static jakarta.transaction.Status.STATUS_UNKNOWN;

import javax.naming.InitialContext;
import javax.naming.NamingException;
import jakarta.transaction.Synchronization;
import jakarta.transaction.SystemException;
import jakarta.transaction.UserTransaction;

import org.glassfish.hk2.api.ServiceLocator;
import org.jboss.weld.transaction.spi.TransactionServices;

import com.sun.enterprise.transaction.api.JavaEETransactionManager;

/**
 * Implements the services related to transactional behaviour used in JSR-299, if that behaviour is going to be
 * used.
 */
public class TransactionServicesImpl implements TransactionServices {

    private JavaEETransactionManager transactionManager;

    public TransactionServicesImpl(ServiceLocator services) {
        transactionManager = services.getService(JavaEETransactionManager.class);
        if (transactionManager == null) {
            throw new RuntimeException("Unable to retrieve transaction mgr.");
        }
    }

    @Override
    public boolean isTransactionActive() {
        try {
            switch (transactionManager.getStatus()) {
                case STATUS_ACTIVE:
                case STATUS_MARKED_ROLLBACK:
                case STATUS_PREPARED:
                case STATUS_UNKNOWN:
                case STATUS_PREPARING:
                case STATUS_COMMITTING:
                case STATUS_ROLLING_BACK:
                    return true;
                default:
                    return false;
            }
        } catch (SystemException e) {
            throw new RuntimeException("Unable to determine transaction status", e);
        }
    }

    @Override
    public void registerSynchronization(Synchronization observer) {
        try {
            transactionManager.registerSynchronization(observer);
        } catch (Exception e) {
            throw new RuntimeException("Unable to register synchronization " + observer + " for current transaction", e);
        }
    }

    @Override
    public UserTransaction getUserTransaction() {
        try {
            return (UserTransaction) new InitialContext().lookup("java:comp/UserTransaction");
        } catch (NamingException e) {
            return null;
        }
    }

    @Override
    public void cleanup() {}
}