/*
 * 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.karaf.eik.ui.project;

import java.util.Properties;

import org.apache.karaf.eik.core.KarafCorePluginUtils;
import org.apache.karaf.eik.core.KarafPlatformModel;
import org.apache.karaf.eik.core.KarafPlatformModelRegistry;
import org.apache.karaf.eik.ui.IKarafProject;
import org.apache.karaf.eik.ui.KarafUIPluginActivator;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.PlatformObject;
import org.eclipse.core.runtime.QualifiedName;

public class KarafProject extends PlatformObject implements IKarafProject {

    private static final IPath ROOT_PATH = new Path(".bin");

    public static final IPath ROOT_PLATFORM_PATH = ROOT_PATH.append("platform");

    public static final IPath ROOT_RUNTIME_PATH = ROOT_PATH.append("runtime");

    /**
     * Determines if the {@link IProject} is actually an {@link IKarafProject}
     *
     * @param project
     *            the {@code IProject} to test
     * @return true if the specified {@code IProject} is a {@code IKarafProject}
     *         ; false otherwise
     */
    public static boolean isKarafProject(final IProject project) {
        try {
            final String karafProject = project.getPersistentProperty(new QualifiedName(KarafUIPluginActivator.PLUGIN_ID, "karafProject"));

            return karafProject != null;
        } catch (final CoreException e) {
            KarafUIPluginActivator.getLogger().warn("Unable to determine if " + project.getName() + " is a Karaf Project", e);
        }

        return false;
    }

    private final IProject project;

    public KarafProject(final IProject project) {
        this.project = project;
    }

    @Override
    public Object getAdapter(@SuppressWarnings("rawtypes") final Class adapter) {
        if (KarafPlatformModel.class.equals(adapter)) {
            try {
                return KarafPlatformModelRegistry.findPlatformModel(getPlatformRootDirectory());
            } catch (final CoreException e) {
                KarafUIPluginActivator.getLogger().error("Unable to find Karaf Platform at the root directory: " + getPlatformRootDirectory().toOSString(), e);
                return null;
            }
        } else if(IProject.class.equals(adapter)) {
            return project;
        } else {
            return super.getAdapter(adapter);
        }
    }

    @Override
    public IFile getFile(final String name) {
        return project.getFile(ROOT_PATH.append(name));
    }

    @Override
    public IFolder getFolder(final String name) {
        return project.getFolder(ROOT_PATH.append(name));
    }

    @Override
    public IPath getLocation() {
        return project.getLocation();
    }

    @Override
    public String getName() {
        return project.getName();
    }

    @Override
    public IPath getPlatformRootDirectory() {
        try {
            final String karafModelPath = project.getPersistentProperty(
                    new QualifiedName(KarafUIPluginActivator.PLUGIN_ID, "karafModel"));

            return new Path(karafModelPath);
        } catch (final CoreException e) {
            KarafUIPluginActivator.getLogger().error("Unable to determine platform root directory for project: " + project.getName(), e);
        }

        return null;
    }

    @Override
    public IProject getProjectHandle() {
        return project;
    }

    @Override
    public Properties getRuntimeProperties() {
        try {
            return KarafCorePluginUtils.loadProperties(
                    project.getFolder(ROOT_RUNTIME_PATH).getRawLocation().toFile(),
                    "runtime.properties");
        } catch (final CoreException e) {
            return new Properties();
        }
    }

}