/*
 * Copyright (C) 2014 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.systemui.statusbar;

import android.annotation.ColorInt;
import android.annotation.DrawableRes;
import android.annotation.StringRes;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.Configuration;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TextView;

import androidx.annotation.NonNull;

import com.android.systemui.res.R;
import com.android.systemui.statusbar.notification.row.StackScrollerDecorView;
import com.android.systemui.statusbar.notification.stack.ExpandableViewState;

public class EmptyShadeView extends StackScrollerDecorView {

    private TextView mEmptyText;
    private TextView mEmptyFooterText;

    private @StringRes int mText = R.string.empty_shade_text;

    private @DrawableRes int mFooterIcon = R.drawable.ic_friction_lock_closed;
    private @StringRes int mFooterText = R.string.unlock_to_see_notif_text;
    private @Visibility int mFooterVisibility = View.GONE;
    private int mSize;

    public EmptyShadeView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mSize = getResources().getDimensionPixelSize(
                R.dimen.notifications_unseen_footer_icon_size);
    }

    @Override
    protected void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        mSize = getResources().getDimensionPixelSize(
                R.dimen.notifications_unseen_footer_icon_size);
        mEmptyText.setText(mText);
        mEmptyFooterText.setVisibility(mFooterVisibility);
        setFooterText(mFooterText);
        setFooterIcon(mFooterIcon);
    }

    @Override
    protected View findContentView() {
        return findViewById(R.id.no_notifications);
    }

    @Override
    protected View findSecondaryView() {
        return findViewById(R.id.no_notifications_footer);
    }

    public void setTextColors(@ColorInt int onSurface, @ColorInt int onSurfaceVariant) {
        mEmptyText.setTextColor(onSurfaceVariant);
        mEmptyFooterText.setTextColor(onSurface);
        mEmptyFooterText.setCompoundDrawableTintList(ColorStateList.valueOf(onSurface));
    }

    public void setText(@StringRes int text) {
        mText = text;
        mEmptyText.setText(mText);
    }

    public void setFooterVisibility(@Visibility int visibility) {
        mFooterVisibility = visibility;
        setSecondaryVisible(/* visible = */ visibility == View.VISIBLE,
                /* animate = */false,
                /* onAnimationEnded = */ null);
    }

    public void setFooterText(@StringRes int text) {
        mFooterText = text;
        if (text != 0) {
            mEmptyFooterText.setText(mFooterText);
        } else {
            mEmptyFooterText.setText(null);
        }
    }

    public void setFooterIcon(@DrawableRes int icon) {
        mFooterIcon = icon;
        Drawable drawable;
        if (icon == 0) {
            drawable = null;
        } else {
            drawable = getResources().getDrawable(icon);
            drawable.setBounds(0, 0, mSize, mSize);
        }
        mEmptyFooterText.setCompoundDrawablesRelative(drawable, null, null, null);
    }

    @StringRes
    public int getTextResource() {
        return mText;
    }

    @StringRes
    public int getFooterTextResource() {
        return mFooterText;
    }

    @DrawableRes
    public int getFooterIconResource() {
        return mFooterIcon;
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        mEmptyText = (TextView) findContentView();
        mEmptyFooterText = (TextView) findSecondaryView();
        mEmptyFooterText.setCompoundDrawableTintList(mEmptyFooterText.getTextColors());
    }

    @Override
    @NonNull
    public ExpandableViewState createExpandableViewState() {
        return new EmptyShadeViewState();
    }

    public class EmptyShadeViewState extends ExpandableViewState {
        @Override
        public void applyToView(View view) {
            super.applyToView(view);
            if (view instanceof EmptyShadeView) {
                EmptyShadeView emptyShadeView = (EmptyShadeView) view;
                boolean visible = this.clipTopAmount <= mEmptyText.getPaddingTop() * 0.6f;
                emptyShadeView.setContentVisibleAnimated(visible && emptyShadeView.isVisible());
            }
        }
    }
}