/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2017, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.wildfly.extension.undertow.filters;

import java.util.Collection;
import java.util.List;

import io.undertow.attribute.ExchangeAttributes;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.handlers.RedirectHandler;
import io.undertow.server.handlers.SetAttributeHandler;

import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.PathElement;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.wildfly.extension.undertow.Constants;

/**
 * @author Stuart Douglas
 */
public class RewriteFilterDefinition extends SimpleFilterDefinition {
    public static final PathElement PATH_ELEMENT = PathElement.pathElement(Constants.REWRITE);

    public static final AttributeDefinition TARGET = new SimpleAttributeDefinitionBuilder("target", ModelType.STRING)
            .setRequired(true)
            .setAllowExpression(true)
            .setRestartAllServices()
            .build();


    public static final AttributeDefinition REDIRECT = new SimpleAttributeDefinitionBuilder("redirect", ModelType.BOOLEAN)
            .setRequired(false)
            .setDefaultValue(ModelNode.FALSE)
            .setAllowExpression(true)
            .setRestartAllServices()
            .build();

    public static final Collection<AttributeDefinition> ATTRIBUTES = List.of(TARGET, REDIRECT);

    RewriteFilterDefinition() {
        super(PATH_ELEMENT, RewriteFilterDefinition::createHandlerWrapper);
    }

    @Override
    public Collection<AttributeDefinition> getAttributes() {
        return ATTRIBUTES;
    }

    static PredicateHandlerWrapper createHandlerWrapper(OperationContext context, ModelNode model) throws OperationFailedException {
        String target = TARGET.resolveModelAttribute(context, model).asString();
        boolean redirect = REDIRECT.resolveModelAttribute(context, model).asBoolean();
        return PredicateHandlerWrapper.filter(new HandlerWrapper() {
            @Override
            public HttpHandler wrap(HttpHandler next) {
                return redirect ? new RedirectHandler(target) : new SetAttributeHandler(next, ExchangeAttributes.relativePath(), ExchangeAttributes.parser(RewriteFilterDefinition.class.getClassLoader()).parse(target));
            }
        });
    }
}
