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// Portions Copyright [2018-2021] [Payara Foundation and/or its affiliates]

package com.sun.ejb.containers;

import jakarta.ejb.TimerService;
import jakarta.transaction.TransactionManager;
import jakarta.transaction.Status;
import javax.naming.InitialContext;
import java.util.logging.Level;

/**
 * Implementation of EJBContext for Singleton SessionBeans
 *
 * @author Mahesh Kannan
 */
public final class SingletonContextImpl extends AbstractSessionContextImpl {

    SingletonContextImpl(Object ejb, BaseContainer container) {
        super(ejb, container);
        try {
            initialContext = new InitialContext();
        } catch (Exception ex) {
            _logger.log(Level.FINE, "Exception in creating InitialContext", ex);
        }

    }

    @Override
    public TimerService getTimerService() throws IllegalStateException {

        // Instance key is first set after dependency injection but
        // before ejbCreate
        if (getInstanceKey() == null) {
            throw new IllegalStateException("Operation not allowed");
        }

        return EJBTimerService.getEJBTimerServiceWrapper(this);
    }

    @Override
    public void setRollbackOnly() throws IllegalStateException {
        if (getInstanceKey() == null) {
            throw new IllegalStateException("Singleton setRollbackOnly not allowed");
        }

        if (container.isBeanManagedTran) {
            throw new IllegalStateException("Illegal operation for bean-managed transactions");
        }

        doGetSetRollbackTxAttrCheck();

        TransactionManager tm = EjbContainerUtilImpl.getInstance().getTransactionManager();

        try {
            if (tm.getStatus() == Status.STATUS_NO_TRANSACTION) {
                // EJB might be in a non-business method (for SessionBeans)
                // or afterCompletion.
                // OR this was a NotSupported/Never/Supports
                // EJB which was invoked without a global transaction.
                // In that case the JDBC connection would have autoCommit=true
                // so the container doesnt have to do anything.
                throw new IllegalStateException("No transaction context.");
            }

            tm.setRollbackOnly();

        } catch (Exception ex) {
            throw new IllegalStateException(ex.toString(), ex);
        }
    }

    @Override
    public boolean getRollbackOnly() throws IllegalStateException {
        if (getInstanceKey() == null) {
            throw new IllegalStateException("Singleton getRollbackOnly not allowed");
        }

        if ( container.isBeanManagedTran ) {
            throw new IllegalStateException(
                "Illegal operation for bean-managed transactions");
        }

        doGetSetRollbackTxAttrCheck();

        TransactionManager tm = EjbContainerUtilImpl.getInstance().getTransactionManager();

        try {
            int status = tm.getStatus();
            if (status == Status.STATUS_NO_TRANSACTION) {
                // EJB which was invoked without a global transaction.
                throw new IllegalStateException("No transaction context.");
            }

            return (status == Status.STATUS_MARKED_ROLLBACK //
                || status == Status.STATUS_ROLLEDBACK //
                || status == Status.STATUS_ROLLING_BACK);

        } catch (Exception ex) {
            throw new IllegalStateException(ex.toString(), ex);
        }
    }

    @Override
    public void checkTimerServiceMethodAccess() throws IllegalStateException {
        if (getInstanceKey() == null) {
            throw new IllegalStateException("EJB Timer method calls cannot be called in this context");
        }
    }


    @Override
    public synchronized Object lookup(String name) {
        if (name == null) {
            throw new IllegalArgumentException("Argument is null");
        }
        if (initialContext == null) {
            throw new IllegalArgumentException("InitialContext is null");
        }
        try {
            // if name starts with java: use it as is.  Otherwise, treat it
            // as relative to the private component namespace.
            String lookupString = name.startsWith("java:") ? name : "java:comp/env/" + name;
            return initialContext.lookup(lookupString);
        } catch(Exception e) {
            throw new IllegalArgumentException(e);
        }
    }

}