/**

 * Copyright (c) 2010 Symbian Foundation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Symbian Foundation - initial contribution.

 * Contributors:

 * Description:

 * Overview:

 * Details:

 * Platforms/Drives/Compatibility:

 * Assumptions/Requirement/Pre-requisites:

 * Failures and causes:

 */

package org.symbian.tools.tmw.core.internal.runtimes;

import java.util.Collection;

import java.util.HashMap;

import java.util.Map;

import java.util.TreeMap;

import org.eclipse.core.runtime.IConfigurationElement;

import org.eclipse.core.runtime.Platform;

import org.symbian.tools.tmw.core.TMWCore;

import org.symbian.tools.tmw.core.projects.IMTWProject;

import org.symbian.tools.tmw.core.runtimes.IMobileWebRuntime;

import org.symbian.tools.tmw.core.runtimes.IMobileWebRuntimeManager;

import org.symbian.tools.tmw.core.runtimes.IPackager;

public final class RuntimesManagerImpl implements IMobileWebRuntimeManager {

    private Map<IMobileWebRuntime, Map<IMobileWebRuntime, IPackager>> packagers;

    private Map<String, IMobileWebRuntime> runtimes;

    public RuntimesManagerImpl() {

        collectRuntimes();

    }

    private void collectPackagers() {

        packagers = new HashMap<IMobileWebRuntime, Map<IMobileWebRuntime, IPackager>>();

        IConfigurationElement[] elements = Platform.getExtensionRegistry().getConfigurationElementsFor(

                TMWCore.PLUGIN_ID, "packagers");

        for (IConfigurationElement element : elements) {

            IPackager packager = new LazyPackager(element);

            Map<IMobileWebRuntime, IPackager> map = packagers.get(packager.getTargetRuntime());

            if (map == null) {

                map = new HashMap<IMobileWebRuntime, IPackager>();

                packagers.put(packager.getTargetRuntime(), map);

            }

            map.put(packager.getSourceRuntime(), packager);

        }

    }

    private void collectRuntimes() {

        runtimes = new TreeMap<String, IMobileWebRuntime>();

        IConfigurationElement[] elements = Platform.getExtensionRegistry().getConfigurationElementsFor(

                TMWCore.PLUGIN_ID, "runtimes");

        for (IConfigurationElement element : elements) {

            final MobileWebRuntime runtime = new MobileWebRuntime(element);

            runtimes.put(getInternalId(runtime.getId(), runtime.getVersion()), runtime);

        }

    }

    public IMobileWebRuntime[] getAllRuntimes() {

        if (runtimes == null) {

            collectRuntimes();

        }

        final Collection<IMobileWebRuntime> rts = runtimes.values();

        return rts.toArray(new IMobileWebRuntime[rts.size()]);

    }

    public IPackager getPackager(IMTWProject project) {

        return getPackager(project, project.getTargetRuntime());

    }

    public IPackager getPackager(IMTWProject project, IMobileWebRuntime runtime) {

        if (packagers == null) {

            collectPackagers();

        }

        final Map<IMobileWebRuntime, IPackager> map = packagers.get(runtime);

        if (map != null) {

            return map.get(project.getTargetRuntime());

        }

        return null;

    }

    public IMobileWebRuntime getRuntime(String id, String version) {

        if (runtimes == null) {

            collectRuntimes();

        }

        final IMobileWebRuntime runtime = runtimes.get(getInternalId(id, version));

        if (runtime == null) {

            TMWCore.log(String.format("Runtime %s@%s", id, version), new Exception());

        }

        return runtime;

    }

    private String getInternalId(String id, String version) {

        return id + ":" + version;

    }

}