/*
 * Copyright (C) 2019 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.uioverrides;

import static android.view.View.VISIBLE;

import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
import static com.android.launcher3.LauncherState.NORMAL;
import static com.android.launcher3.LauncherState.OVERVIEW;

import androidx.annotation.Nullable;

import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherState;
import com.android.launcher3.LauncherStateManager.StateHandler;
import com.android.launcher3.anim.AnimatorPlaybackController;
import com.android.launcher3.util.TouchController;
import com.android.quickstep.OverviewInteractionState;
import com.android.quickstep.views.RecentsView;

/**
 * Provides recents-related {@link UiFactory} logic and classes.
 */
public final class RecentsUiFactory {

    // Scale recents takes before animating in
    private static final float RECENTS_PREPARE_SCALE = 1.33f;

    private RecentsUiFactory() {}

    /**
     * Creates and returns a touch controller for swiping recents tasks.
     *
     * @param launcher the launcher activity
     * @return the touch controller for recents tasks
     */
    public static @Nullable TouchController createTaskSwipeController(Launcher launcher) {
        return new LauncherTaskViewController(launcher);
    }

    /**
     * Creates and returns a touch controller for swiping from overview state to the all apps state
     * if such an action is supported.
     *
     * @param launcher the launcher activity
     * @return the touch controller for swiping from overview to all apps
     */
    public static @Nullable TouchController createOverviewToAllAppsTouchController(
            Launcher launcher) {
        boolean swipeUpEnabled = OverviewInteractionState.INSTANCE.get(launcher)
                .isSwipeUpGestureEnabled();
        if (!swipeUpEnabled || launcher.getDeviceProfile().isVerticalBarLayout()) {
            return new OverviewToAllAppsTouchController(launcher);
        }
        return null;
    }

    /**
     * Creates and returns the controller responsible for recents view state transitions.
     *
     * @param launcher the launcher activity
     * @return state handler for recents
     */
    public static StateHandler createRecentsViewStateController(Launcher launcher) {
        return new RecentsViewStateController(launcher);
    }

    /**
     * Prepare the recents view to animate in.
     *
     * @param launcher the launcher activity
     */
    public static void prepareToShowRecents(Launcher launcher) {
        RecentsView overview = launcher.getOverviewPanel();
        if (overview.getVisibility() != VISIBLE || overview.getContentAlpha() == 0) {
            SCALE_PROPERTY.set(overview, RECENTS_PREPARE_SCALE);
        }
    }

    /**
     * Clean-up logic that occurs when recents is no longer in use/visible.
     *
     * @param launcher the launcher activity
     */
    public static void resetRecents(Launcher launcher) {
        RecentsView recents = launcher.getOverviewPanel();
        recents.reset();
    }

    /**
     * Recents logic that triggers when launcher state changes or launcher activity stops/resumes.
     *
     * @param launcher the launcher activity
     */
    public static void onLauncherStateOrResumeChanged(Launcher launcher) {
        LauncherState state = launcher.getStateManager().getState();
        if (state == NORMAL) {
            launcher.<RecentsView>getOverviewPanel().setSwipeDownShouldLaunchApp(false);
        }
    }

    private static final class LauncherTaskViewController extends
            TaskViewTouchController<Launcher> {

        LauncherTaskViewController(Launcher activity) {
            super(activity);
        }

        @Override
        protected boolean isRecentsInteractive() {
            return mActivity.isInState(OVERVIEW);
        }

        @Override
        protected void onUserControlledAnimationCreated(AnimatorPlaybackController animController) {
            mActivity.getStateManager().setCurrentUserControlledAnimation(animController);
        }
    }
}