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package org.glassfish.admingui.common.security;

import com.sun.enterprise.config.serverbeans.*;
import com.sun.enterprise.util.EarlyLogger;
import org.glassfish.api.admin.config.ConfigurationUpgrade;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.PostConstruct;
import org.jvnet.hk2.config.ConfigSupport;
import org.jvnet.hk2.config.SingleConfigCode;
import org.jvnet.hk2.config.TransactionFailure;
import org.jvnet.hk2.config.types.Property;

import java.beans.PropertyVetoException;
import java.util.List;
import java.util.logging.Level;

/**
 * Adds the needed message-security-config information to domain.xml
 * during an upgrade from a v2.X server. For more information see:
 * https://glassfish.dev.java.net/issues/show_bug.cgi?id=13443
 */
@Service
public class AdminConsoleConfigUpgrade
    implements ConfigurationUpgrade, PostConstruct {

    private static final String AUTH_LAYER = "HttpServlet";
    private static final String PROVIDER_TYPE = "server";
    private static final String PROVIDER_ID = "GFConsoleAuthModule";
    private static final String CLASS_NAME =
        "org.glassfish.admingui.common.security.AdminConsoleAuthModule";
    private static final String AUTH_SOURCE = "sender";
    private static final String AUTH_URL_PROP = "restAuthURL";
    private static final String AUTH_URL_VAL =
        "http://localhost:4848/management/sessions";
    private static final String LOGIN_PAGE_PROP = "loginPage";
    private static final String LOGIN_PAGE_VAL = "/login.jsf";
    private static final String LOGIN_ERR_PAGE_PROP = "loginErrorPage";
    private static final String LOGIN_ERR_PAGE_VAL = "/loginError.jsf";

    @Inject
    Configs configs;

    @Override
    public void postConstruct() {
        for (Config config : configs.getConfig()) {
            SecurityService s = config.getSecurityService();
            if (s == null) {
                continue;
            }
            try {
                ConfigSupport.apply(new AdminConsoleConfigCode(), s);
            } catch (TransactionFailure tf) {
                EarlyLogger.add(Level.SEVERE,
                    "Could not upgrade security service for admin console: " +
                    tf);
            }
        }
    }

    private class AdminConsoleConfigCode
        implements SingleConfigCode<SecurityService> {

        @Override
        public Object run(SecurityService service)
            throws PropertyVetoException, TransactionFailure {

            /*
             * TODO: if the element is already present, should we check it
             * instead of just returning? If so, don't forget to enroll
             * it in the transaction.
             */
            for (MessageSecurityConfig msc :
                service.getMessageSecurityConfig()) {
                if (AUTH_LAYER.equals(msc.getAuthLayer())) {
                    return null;
                }
            }

            // create/add message-security-config
            MessageSecurityConfig msConfig =
                service.createChild(MessageSecurityConfig.class);
            msConfig.setAuthLayer(AUTH_LAYER);
            service.getMessageSecurityConfig().add(msConfig);

            // create/add provider-config
            ProviderConfig pConfig = msConfig.createChild(ProviderConfig.class);
            pConfig.setProviderType(PROVIDER_TYPE);
            pConfig.setProviderId(PROVIDER_ID);
            pConfig.setClassName(CLASS_NAME);
            msConfig.getProviderConfig().add(pConfig);

            // create/add request-policy
            RequestPolicy reqPol = pConfig.createChild(RequestPolicy.class);
            reqPol.setAuthSource(AUTH_SOURCE);
            pConfig.setRequestPolicy(reqPol);

            // create/add response-policy
            ResponsePolicy resPol = pConfig.createChild(ResponsePolicy.class);
            pConfig.setResponsePolicy(resPol);

            // add properties
            Property urlProp = pConfig.createChild(Property.class);
            urlProp.setName(AUTH_URL_PROP);
            urlProp.setValue(AUTH_URL_VAL);

            Property logPageProp = pConfig.createChild(Property.class);
            logPageProp.setName(LOGIN_PAGE_PROP);
            logPageProp.setValue(LOGIN_PAGE_VAL);

            Property logErrPage = pConfig.createChild(Property.class);
            logErrPage.setName(LOGIN_ERR_PAGE_PROP);
            logErrPage.setValue(LOGIN_ERR_PAGE_VAL);

            List<Property> props = pConfig.getProperty();
            props.add(urlProp);
            props.add(logPageProp);
            props.add(logErrPage);

            return null;
        }
    }

}