/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.felix.ipojo.runtime.externalhandlers.components;

import org.apache.felix.ipojo.PrimitiveHandler;
import org.apache.felix.ipojo.architecture.ComponentTypeDescription;
import org.apache.felix.ipojo.architecture.HandlerDescription;
import org.apache.felix.ipojo.architecture.PropertyDescription;
import org.apache.felix.ipojo.metadata.Element;
import org.apache.felix.ipojo.runtime.externalhandlers.services.CheckService;
import org.apache.felix.ipojo.runtime.externalhandlers.services.CheckServiceHandlerDescription;
import org.osgi.framework.ServiceRegistration;

import java.util.Dictionary;
import java.util.Hashtable;

public class CheckServiceAndFieldInterceptorHandler extends PrimitiveHandler implements CheckService {

	ServiceRegistration sr;
	boolean isValid;
	int changes = 0;
	static final String NAMESPACE = "org.apache.felix.ipojo.test.handler.checkservice";

	Dictionary<String, Object> props = new Hashtable<String, Object>();
    private String m_value;

    public void configure(Element metadata, Dictionary configuration) {
		Element[] meta = metadata.getElements("checkAndSet", NAMESPACE);
		if(meta == null) { return;	}
		// Get handler props
		props.put("instance.name", configuration.get("instance.name"));
		if(configuration.get("csh.simple") != null) { props.put("Simple", configuration.get("csh.simple")); }
		if(configuration.get("csh.map") != null) {
			Dictionary m = (Dictionary) configuration.get("csh.map");
            if (m.size() > 0) {
                props.put("Map1", m.get("a"));
                props.put("Map2", m.get("b"));
                props.put("Map3", m.get("c"));
            }
		}
		props.put("changes", changes);

        getInstanceManager().register(getPojoMetadata().getField("m_foo"), this);
        m_value = (String) configuration.get("foo");

	}

	public void initializeComponentFactory(ComponentTypeDescription cd, Element metadata) {
	    cd.addProperty(new PropertyDescription("csh.simple", "java.lang.String", null));
        cd.addProperty(new PropertyDescription("csh.map", "java.util.Dictionary", null));
	}

	public void start() {
		if(sr == null) {
			sr = getInstanceManager().getContext().registerService(CheckService.class.getName(), this, props);
		}
		isValid = true;
	}

	public void stop() {
		isValid = false;
		synchronized(this) {
			if(sr != null) { sr.unregister(); }
		}
	}

	public boolean check() {
        isValid = !isValid;
		return isValid;
	}

	public Dictionary<String, Object> getProps() {
        props.put("foo", m_value);
		return props;
	}

	public void stateChanged(int state) {
		if (sr != null) {
		    changes++;
		    props.put("changes", changes);
		    sr.setProperties(props);
		}
	}

	public String getName() {
		return NAMESPACE;
	}

	public HandlerDescription getDescription() {
		return new CheckServiceHandlerDescription(this);
	}

    @Override
    public Object onGet(Object pojo, String fieldName, Object value) {
        if (fieldName.equals("m_foo")) {
            return m_value;
        }
        if (pojo == null) {
            throw new IllegalStateException("pojo parameter null - FELIX-4072");
        }
        return value;
    }

    @Override
    public void onSet(Object pojo, String fieldName, Object value) {
        if (fieldName.equals("m_foo")) {
            System.out.println("Attempt to set the foo field to " + value);
            m_value = (String) value;
        }
        if (pojo == null) {
            throw new IllegalStateException("pojo parameter null - FELIX-4072");
        }
    }
}