/*
 * Copyright (C) 2017 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.android.tv.app;

import com.android.tv.TvApplication;
import com.android.tv.TvSingletons;
import com.android.tv.analytics.Analytics;
import com.android.tv.analytics.StubAnalytics;
import com.android.tv.analytics.Tracker;
import com.android.tv.common.dagger.ApplicationModule;
import com.android.tv.common.flags.impl.DefaultBackendKnobsFlags;
import com.android.tv.common.flags.impl.DefaultCloudEpgFlags;
import com.android.tv.common.flags.impl.DefaultUiFlags;
import com.android.tv.common.singletons.HasSingletons;
import com.android.tv.modules.TvSingletonsModule;
import com.android.tv.perf.PerformanceMonitor;
import com.android.tv.tunerinputcontroller.BuiltInTunerManager;

import com.google.common.base.Optional;

import dagger.android.AndroidInjector;

import javax.inject.Inject;

/** The top level application for Live TV. */
public class LiveTvApplication extends TvApplication implements HasSingletons<TvSingletons> {

    static {
        STARTUP_MEASURE.onAppClassLoaded();
    }

    private final DefaultBackendKnobsFlags mBackendKnobsFlags = new DefaultBackendKnobsFlags();
    private final DefaultCloudEpgFlags mCloudEpgFlags = new DefaultCloudEpgFlags();
    private final DefaultUiFlags mUiFlags = new DefaultUiFlags();

    private Analytics mAnalytics;
    private Tracker mTracker;
    @Inject PerformanceMonitor mPerformanceMonitor;

    @Override
    protected AndroidInjector<LiveTvApplication> applicationInjector() {
        return DaggerLiveTvApplicationComponent.builder()
                .applicationModule(new ApplicationModule(this))
                .tvSingletonsModule(new TvSingletonsModule(this))
                .build();
    }

    @Override
    public void onCreate() {
        super.onCreate();
        STARTUP_MEASURE.onAppCreate(this);
    }

    @Override
    public PerformanceMonitor getPerformanceMonitor() {
        return mPerformanceMonitor;
    }

    @Override
    public DefaultBackendKnobsFlags getBackendKnobs() {
        return mBackendKnobsFlags;
    }

    /** Returns the {@link Analytics}. */
    @Override
    public synchronized Analytics getAnalytics() {
        if (mAnalytics == null) {
            mAnalytics = StubAnalytics.getInstance(this);
        }
        return mAnalytics;
    }

    /** Returns the default tracker. */
    @Override
    public synchronized Tracker getTracker() {
        if (mTracker == null) {
            mTracker = getAnalytics().getDefaultTracker();
        }
        return mTracker;
    }

    @Override
    public DefaultCloudEpgFlags getCloudEpgFlags() {
        return mCloudEpgFlags;
    }

    @Override
    public DefaultUiFlags getUiFlags() {
        return mUiFlags;
    }

    @Override
    public Optional<BuiltInTunerManager> getBuiltInTunerManager() {
        return Optional.absent();
    }

    @Override
    public TvSingletons singletons() {
        return this;
    }
}