/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed 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 com.limemobile.app.launcher;

import android.app.Application;
import android.content.ContentResolver;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.ContentObserver;
import android.os.Handler;

import com.limemobile.app.launcher.activity.Launcher;
import com.limemobile.app.launcher.common.LauncherSettings;
import com.limemobile.app.launcher.receiver.LauncherModel;
import com.limemobile.app.launcher.util.IconCache;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class LauncherApplication extends Application {
    public LauncherModel mModel;
    public IconCache mIconCache;
    
    private static Object runtime = null;    
    private final static float TARGET_HEAP_UTILIZATION = 0.75f;    
    private final static int CWJ_HEAP_SIZE = 6* 1024* 1024 ;

    @Override
    public void onCreate() {
        //VMRuntime.getRuntime().setTargetHeapUtilization(TARGET_HEAP_UTILIZATION);
        //VMRuntime.getRuntime().setMinimumHeapSize(4 * 1024 * 1024);
        try {
            Class<?> cl = Class.forName("dalvik.system.VMRuntime");
            Method getRt = cl.getMethod("getRuntime", new Class[0]);
            runtime = getRt.invoke(null, new Object[0]);
            
            final Class<?>[] longArgsClass = new Class[1];
            longArgsClass[0] = Long.TYPE;
            Method setMiniHeaP = runtime.getClass().getMethod("setMinimumHeapSize", longArgsClass);
            setMiniHeaP.invoke(runtime, CWJ_HEAP_SIZE);
            
            final Class<?>[] floatArgsClass = new Class[1];
            floatArgsClass[0] = Float.TYPE;
            Method setTargetHeapUtilization = runtime.getClass().getMethod("setTargetHeapUtilization", floatArgsClass);
            setTargetHeapUtilization.invoke(runtime, TARGET_HEAP_UTILIZATION);
        } catch (ClassNotFoundException e) {
        } catch (SecurityException e) {
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
        } catch (IllegalAccessException e) {
        } catch (InvocationTargetException e) {
        }
        
        super.onCreate();

        mIconCache = new IconCache(this);
        mModel = new LauncherModel(this, mIconCache);

        // Register intent receivers
        IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
        filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
        filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
        filter.addDataScheme("package");
        registerReceiver(mModel, filter);
        filter = new IntentFilter();
        filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
        filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE);
        registerReceiver(mModel, filter);

        // Register for changes to the favorites
        ContentResolver resolver = getContentResolver();
        resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
                mFavoritesObserver);
    }

    /**
     * There's no guarantee that this function is ever called.
     */
    @Override
    public void onTerminate() {
        super.onTerminate();

        unregisterReceiver(mModel);

        ContentResolver resolver = getContentResolver();
        resolver.unregisterContentObserver(mFavoritesObserver);
    }

    /**
     * Receives notifications whenever the user favorites have changed.
     */
    private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
        @Override
        public void onChange(boolean selfChange) {
            mModel.startLoader(LauncherApplication.this, false);
        }
    };

    public LauncherModel setLauncher(Launcher launcher) {
        mModel.initialize(launcher);
        return mModel;
    }

    public IconCache getIconCache() {
        return mIconCache;
    }

    public LauncherModel getModel() {
        return mModel;
    }
}