/*
 * Copyright (C) 2016 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.launcher3.searchlauncher;

import com.android.launcher3.Launcher;
import com.android.launcher3.Launcher.LauncherOverlay;
import com.android.launcher3.Launcher.LauncherOverlayCallbacks;
import com.google.android.libraries.gsa.launcherclient.LauncherClient;
import com.google.android.libraries.gsa.launcherclient.LauncherClientCallbacks;

/**
 * Implements {@link LauncherOverlay} and passes all the corresponding events to {@link
 * LauncherClient}. {@see setClient}
 *
 * <p>Implements {@link LauncherClientCallbacks} and sends all the corresponding callbacks to {@link
 * Launcher}.
 */
public class OverlayCallbackImpl implements LauncherOverlay, LauncherClientCallbacks {
    private final Launcher mLauncher;

    private LauncherClient mClient;
    private LauncherOverlayCallbacks mLauncherOverlayCallbacks;
    private boolean mWasOverlayAttached = false;

    public OverlayCallbackImpl(Launcher launcher) {
        mLauncher = launcher;
    }

    public void setClient(LauncherClient client) {
        mClient = client;
    }

    @Override
    public void onServiceStateChanged(boolean overlayAttached, boolean hotwordActive) {
        if (overlayAttached != mWasOverlayAttached) {
            mWasOverlayAttached = overlayAttached;
            mLauncher.setLauncherOverlay(overlayAttached ? this : null);
        }
    }

    @Override
    public void onOverlayScrollChanged(float progress) {
        if (mLauncherOverlayCallbacks != null) {
            mLauncherOverlayCallbacks.onScrollChanged(progress);
        }
    }

    @Override
    public void onScrollInteractionBegin() {
        mClient.startMove();
    }

    @Override
    public void onScrollInteractionEnd() {
        mClient.endMove();
    }

    @Override
    public void onScrollChange(float progress, boolean rtl) {
        mClient.updateMove(progress);
    }

    @Override
    public void setOverlayCallbacks(Launcher.LauncherOverlayCallbacks callbacks) {
        mLauncherOverlayCallbacks = callbacks;
    }


}