/*
 * 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.qs;

import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Canvas;
import android.graphics.Path;
import android.graphics.Point;
import android.util.AttributeSet;
import android.view.View;
import android.widget.FrameLayout;

import com.android.settingslib.Utils;
import com.android.systemui.R;
import com.android.systemui.qs.customize.QSCustomizer;
import com.android.systemui.statusbar.ExpandableOutlineView;

/**
 * Wrapper view with background which contains {@link QSPanel} and {@link BaseStatusBarHeader}
 */
public class QSContainerImpl extends FrameLayout {

    private final Point mSizePoint = new Point();
    private final Path mClipPath = new Path();

    private int mHeightOverride = -1;
    protected View mQSPanel;
    private View mQSDetail;
    protected View mHeader;
    protected float mQsExpansion;
    private QSCustomizer mQSCustomizer;
    private View mQSFooter;
    private View mBackground;
    private float mRadius;
    private int mSideMargins;

    public QSContainerImpl(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        mQSPanel = findViewById(R.id.quick_settings_panel);
        mQSDetail = findViewById(R.id.qs_detail);
        mHeader = findViewById(R.id.header);
        mQSCustomizer = findViewById(R.id.qs_customize);
        mQSFooter = findViewById(R.id.qs_footer);
        mBackground = findViewById(R.id.quick_settings_background);
        mRadius = getResources().getDimensionPixelSize(
                Utils.getThemeAttr(mContext, android.R.attr.dialogCornerRadius));
        mSideMargins = getResources().getDimensionPixelSize(R.dimen.notification_side_paddings);

        setClickable(true);
        setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO);
        setMargins();
    }

    @Override
    public boolean performClick() {
        // Want to receive clicks so missing QQS tiles doesn't cause collapse, but
        // don't want to do anything with them.
        return true;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        getDisplay().getRealSize(mSizePoint);

        // Since we control our own bottom, be whatever size we want.
        // Otherwise the QSPanel ends up with 0 height when the window is only the
        // size of the status bar.
        Configuration config = getResources().getConfiguration();
        boolean navBelow = config.smallestScreenWidthDp >= 600
                || config.orientation != Configuration.ORIENTATION_LANDSCAPE;
        MarginLayoutParams params = (MarginLayoutParams) mQSPanel.getLayoutParams();
        int maxQs = mSizePoint.y - params.topMargin - params.bottomMargin - getPaddingBottom()
                - getResources().getDimensionPixelSize(R.dimen.qs_notif_collapsed_space);
        if (navBelow) {
            maxQs -= getResources().getDimensionPixelSize(R.dimen.navigation_bar_height);
        }
        mQSPanel.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(maxQs, MeasureSpec.AT_MOST));

        int width = mQSPanel.getMeasuredWidth();
        LayoutParams layoutParams = (LayoutParams) mQSPanel.getLayoutParams();
        int height = layoutParams.topMargin + layoutParams.bottomMargin
                + mQSPanel.getMeasuredHeight();
        super.onMeasure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY),
                MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));

        // QSCustomizer will always be the height of the screen, but do this after
        // other measuring to avoid changing the height of the QS.
        mQSCustomizer.measure(widthMeasureSpec,
                MeasureSpec.makeMeasureSpec(mSizePoint.y, MeasureSpec.EXACTLY));
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        updateExpansion();
    }

    @Override
    protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
        boolean ret;
        canvas.save();
        if (child != mQSCustomizer) {
            canvas.clipPath(mClipPath);
        }
        ret = super.drawChild(canvas, child, drawingTime);
        canvas.restore();
        return ret;
    }

    /**
     * Overrides the height of this view (post-layout), so that the content is clipped to that
     * height and the background is set to that height.
     *
     * @param heightOverride the overridden height
     */
    public void setHeightOverride(int heightOverride) {
        mHeightOverride = heightOverride;
        updateExpansion();
    }

    public void updateExpansion() {
        int height = calculateContainerHeight();
        setBottom(getTop() + height);
        mQSDetail.setBottom(getTop() + height);
        // Pin QS Footer to the bottom of the panel.
        mQSFooter.setTranslationY(height - mQSFooter.getHeight());
        mBackground.setTop(mQSPanel.getTop());
        mBackground.setBottom(height);

        ExpandableOutlineView.getRoundedRectPath(0, 0, getWidth(), height, mRadius,
                mRadius,
                mClipPath);
    }

    protected int calculateContainerHeight() {
        int heightOverride = mHeightOverride != -1 ? mHeightOverride : getMeasuredHeight();
        return mQSCustomizer.isCustomizing() ? mQSCustomizer.getHeight()
                : Math.round(mQsExpansion * (heightOverride - mHeader.getHeight()))
                + mHeader.getHeight();
    }

    public void setExpansion(float expansion) {
        mQsExpansion = expansion;
        updateExpansion();
    }

    private void setMargins() {
        setMargins(mQSDetail);
        setMargins(mBackground);
        setMargins(mQSFooter);
        setMargins(mQSPanel);
        setMargins(mHeader);
        setMargins(mQSCustomizer);
    }

    private void setMargins(View view) {
        FrameLayout.LayoutParams lp = (LayoutParams) view.getLayoutParams();
        lp.rightMargin = mSideMargins;
        lp.leftMargin = mSideMargins;
    }
}