/*
 * Copyright (C) 2020 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.allapps;

import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_TURN_OFF_WORK_APPS_TAP;
import static com.android.launcher3.workprofile.PersonalWorkSlidingTabStrip.getTabWidth;

import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup.MarginLayoutParams;
import android.view.WindowInsets;
import android.widget.Button;

import androidx.core.graphics.Insets;
import androidx.core.view.WindowInsetsCompat;

import com.android.launcher3.DeviceProfile;
import com.android.launcher3.Insettable;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.anim.KeyboardInsetAnimationCallback;
import com.android.launcher3.config.FeatureFlags;
import com.android.launcher3.model.StringCache;
import com.android.launcher3.views.ActivityContext;
import com.android.launcher3.workprofile.PersonalWorkSlidingTabStrip;

/**
 * Work profile toggle switch shown at the bottom of AllApps work tab
 */
public class WorkModeSwitch extends Button implements Insettable, View.OnClickListener,
        KeyboardInsetAnimationCallback.KeyboardInsetListener,
        PersonalWorkSlidingTabStrip.OnActivePageChangedListener {

    private static final int FLAG_FADE_ONGOING = 1 << 1;
    private static final int FLAG_TRANSLATION_ONGOING = 1 << 2;
    private static final int FLAG_PROFILE_TOGGLE_ONGOING = 1 << 3;

    private final Rect mInsets = new Rect();
    private final Rect mImeInsets = new Rect();
    private int mFlags;
    private boolean mWorkEnabled;
    private boolean mOnWorkTab;

    public WorkModeSwitch(Context context) {
        this(context, null, 0);
    }

    public WorkModeSwitch(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public WorkModeSwitch(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        setSelected(true);
        setOnClickListener(this);
        if (Utilities.ATLEAST_R) {
            KeyboardInsetAnimationCallback keyboardInsetAnimationCallback =
                    new KeyboardInsetAnimationCallback(this);
            setWindowInsetsAnimationCallback(keyboardInsetAnimationCallback);
        }
        ActivityContext activityContext = ActivityContext.lookupContext(getContext());
        DeviceProfile grid = activityContext.getDeviceProfile();
        setInsets(grid.getInsets());

        StringCache cache = activityContext.getStringCache();
        if (cache != null) {
            setText(cache.workProfilePauseButton);
        }
    }

    @Override
    public void setInsets(Rect insets) {
        mInsets.set(insets);
        updateTranslationY();
        MarginLayoutParams lp = (MarginLayoutParams) getLayoutParams();
        if (lp != null) {
            int bottomMargin = getResources().getDimensionPixelSize(R.dimen.work_fab_margin_bottom);
            DeviceProfile dp = ActivityContext.lookupContext(getContext()).getDeviceProfile();
            if (FeatureFlags.ENABLE_FLOATING_SEARCH_BAR.get()) {
                bottomMargin += dp.hotseatQsbHeight;
            }

            if (!dp.isGestureMode && dp.isTaskbarPresent) {
                bottomMargin += dp.taskbarSize;
            } else {
                bottomMargin += insets.bottom;
            }

            lp.bottomMargin = bottomMargin;
        }
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        DeviceProfile dp = ActivityContext.lookupContext(getContext()).getDeviceProfile();
        View parent = (View) getParent();
        int size = parent.getWidth() - parent.getPaddingLeft() - parent.getPaddingRight()
                - 2 * dp.allAppsLeftRightPadding;
        int tabWidth = getTabWidth(getContext(), size);
        int shift = (size - tabWidth) / 2 + dp.allAppsLeftRightPadding;
        setTranslationX(Utilities.isRtl(getResources()) ? shift : -shift);
    }

    @Override
    public void onActivePageChanged(int page) {
        mOnWorkTab = page == ActivityAllAppsContainerView.AdapterHolder.WORK;
        updateVisibility();
    }

    @Override
    public void onClick(View view) {
        if (Utilities.ATLEAST_P && isEnabled()) {
            setFlag(FLAG_PROFILE_TOGGLE_ONGOING);
            ActivityContext activityContext = ActivityContext.lookupContext(getContext());
            activityContext.getStatsLogManager().logger().log(LAUNCHER_TURN_OFF_WORK_APPS_TAP);
            activityContext.getAppsView().getWorkManager().setWorkProfileEnabled(false);
        }
    }

    @Override
    public boolean isEnabled() {
        return super.isEnabled() && getVisibility() == VISIBLE && mFlags == 0;
    }

    /**
     * Sets the enabled or disabled state of the button
     */
    public void updateCurrentState(boolean isEnabled) {
        removeFlag(FLAG_PROFILE_TOGGLE_ONGOING);
        if (mWorkEnabled != isEnabled) {
            mWorkEnabled = isEnabled;
            updateVisibility();
        }
    }

    private void updateVisibility() {
        clearAnimation();
        if (mWorkEnabled && mOnWorkTab) {
            setFlag(FLAG_FADE_ONGOING);
            setVisibility(VISIBLE);
            animate().alpha(1).withEndAction(() -> removeFlag(FLAG_FADE_ONGOING)).start();
        } else if (getVisibility() != GONE) {
            setFlag(FLAG_FADE_ONGOING);
            animate().alpha(0).withEndAction(() -> {
                removeFlag(FLAG_FADE_ONGOING);
                this.setVisibility(GONE);
            }).start();
        }
    }

    @Override
    public WindowInsets onApplyWindowInsets(WindowInsets insets) {
        WindowInsetsCompat windowInsetsCompat =
                WindowInsetsCompat.toWindowInsetsCompat(insets, this);
        if (windowInsetsCompat.isVisible(WindowInsetsCompat.Type.ime())) {
            setInsets(mImeInsets, windowInsetsCompat.getInsets(WindowInsetsCompat.Type.ime()));
        } else {
            mImeInsets.setEmpty();
        }
        updateTranslationY();
        return super.onApplyWindowInsets(insets);
    }

    private void updateTranslationY() {
        setTranslationY(-mImeInsets.bottom);
    }

    @Override
    public void setTranslationY(float translationY) {
        // Always translate at least enough for nav bar insets.
        super.setTranslationY(Math.min(translationY, -mInsets.bottom));
    }

    private void setInsets(Rect rect, Insets insets) {
        rect.set(insets.left, insets.top, insets.right, insets.bottom);
    }

    @Override
    public void onTranslationStart() {
        setFlag(FLAG_TRANSLATION_ONGOING);
    }

    @Override
    public void onTranslationEnd() {
        removeFlag(FLAG_TRANSLATION_ONGOING);
    }

    private void setFlag(int flag) {
        mFlags |= flag;
    }

    private void removeFlag(int flag) {
        mFlags &= ~flag;
    }
}