package org.litesoft.security;

import org.litesoft.core.*;

public abstract class AbstractCurrentSecurityUserAccessor<PO extends SecurityUser<PO>, VO extends SecurityUserView<VO>,
        RRPO extends SecurityRestrictedResource<RRPO>>
        extends AbstractCurrentSecurityPOAccessor<PO, VO> {
    private final SecurityUserViewPoServerVoDataProvider<VO, PO, RRPO> mUserDataProvider;

    protected AbstractCurrentSecurityUserAccessor( Class<PO> pClassPO, Class<VO> pClassVO, SecurityUserViewPoServerVoDataProvider<VO, PO, RRPO> pDataProvider ) {
        super( "User", pClassPO, pClassVO, pDataProvider );
        mUserDataProvider = pDataProvider;
    }

    public PO getRequiredUser() {
        PO zUser = getOptionalUser( null );
        if ( zUser == null ) {
            throw new SessionExpiredException( "No Current User" );
        }
        return zUser;
    }

    public PO getOptionalUser( String pDefaultUserLoginEmail ) {
        Pair<PO, VO> zPair = getPair( pDefaultUserLoginEmail );
        System.out.println( zPair );
        if ( zPair.getVO() == null ) {
            return null;
        }
        if ( (zPair.getPO() == null) || !zPair.inSync() ) {
            zPair = refresh( zPair );
        }
        return zPair.getPO();
    }

    public VO getUserView( String pDefaultUserLoginEmail ) {
        Pair<PO, VO> zPair = getPair( pDefaultUserLoginEmail );
        if ( zPair.isStale() ) {
            zPair = refresh( zPair );
        }
        return zPair.getVO();
    }

    public VO updateUser( PO pPO ) {
        VO zView = mDataProvider.createView( pPO, false );
        update( zView, pPO );
        return zView;
    }

    protected Pair<PO, VO> getPair( String pDefaultUserLoginEmail ) {
        VO zView = getCachedInstance();
        if ( (zView == null) && (pDefaultUserLoginEmail != null) ) {
            mUserDataProvider.loginDefaultUser( pDefaultUserLoginEmail ); // Switch Users!
            zView = getCachedInstance();
        }
        return createPair( zView );
    }
}