/*
 * 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.maven.profiles.activation;

import java.util.Properties;

import org.apache.maven.model.Activation;
import org.apache.maven.model.ActivationProperty;
import org.apache.maven.model.Profile;
import org.codehaus.plexus.context.Context;
import org.codehaus.plexus.context.ContextException;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Contextualizable;

/**
 * SystemPropertyProfileActivator
 */
@Deprecated
public class SystemPropertyProfileActivator extends DetectedProfileActivator implements Contextualizable {
    private Properties properties;

    public void contextualize(Context context) throws ContextException {
        properties = (Properties) context.get("SystemProperties");
    }

    protected boolean canDetectActivation(Profile profile) {
        return profile.getActivation() != null && profile.getActivation().getProperty() != null;
    }

    public boolean isActive(Profile profile) throws ProfileActivationException {
        Activation activation = profile.getActivation();

        ActivationProperty property = activation.getProperty();

        if (property != null) {
            String name = property.getName();
            boolean reverseName = false;

            if (name == null) {
                throw new ProfileActivationException(
                        "The property name is required to activate the profile '" + profile.getId() + "'");
            }

            if (name.startsWith("!")) {
                reverseName = true;
                name = name.substring(1);
            }

            String sysValue = properties.getProperty(name);

            String propValue = property.getValue();
            if (propValue != null && !propValue.isEmpty()) {
                boolean reverseValue = false;
                if (propValue.startsWith("!")) {
                    reverseValue = true;
                    propValue = propValue.substring(1);
                }

                // we have a value, so it has to match the system value...
                boolean result = propValue.equals(sysValue);

                if (reverseValue) {
                    return !result;
                } else {
                    return result;
                }
            } else {
                boolean result = sysValue != null && !sysValue.isEmpty();

                if (reverseName) {
                    return !result;
                } else {
                    return result;
                }
            }
        }

        return false;
    }
}
