/*
 * Copyright (C) 2017 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.tileimpl;

import static android.view.accessibility.AccessibilityEvent.CONTENT_CHANGE_TYPE_STATE_DESCRIPTION;

import static com.android.systemui.qs.tileimpl.QSIconViewImpl.QS_ANIM_LENGTH;

import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.drawable.AdaptiveIconDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.RippleDrawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.PathShape;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.service.quicksettings.Tile;
import android.text.TextUtils;
import android.util.Log;
import android.util.PathParser;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.Switch;

import com.android.settingslib.Utils;
import com.android.systemui.R;
import com.android.systemui.plugins.qs.QSIconView;
import com.android.systemui.plugins.qs.QSTile;
import com.android.systemui.plugins.qs.QSTile.BooleanState;

public class QSTileBaseView extends com.android.systemui.plugins.qs.QSTileView {

    private static final String TAG = "QSTileBaseView";
    private static final int ICON_MASK_ID = com.android.internal.R.string.config_icon_mask;
    protected final Handler mHandler = new H();
    private final int[] mLocInScreen = new int[2];
    protected final FrameLayout mIconFrame;
    protected QSIconView mIcon;
    protected RippleDrawable mRipple;
    protected Drawable mTileBackground;
    private String mAccessibilityClass;
    private boolean mTileState;
    protected boolean mCollapsedView;
    protected boolean mShowRippleEffect = true;
    private float mStrokeWidthActive;
    private float mStrokeWidthInactive;

    protected final ImageView mBg;
    private final int mColorActive;
    private final int mColorInactive;
    private int mCircleColor;
    private int mBgSize;

    private static final int INVALID = -1;
    private CharSequence mStateDescriptionDeltas = null;
    private CharSequence mLastStateDescription;
    private int mLastState = INVALID;

    public QSTileBaseView(Context context, QSIconView icon) {
        this(context, icon, false);
    }

    public QSTileBaseView(Context context, QSIconView icon, boolean collapsedView) {
        super(context);
        // Default to Quick Tile padding, and QSTileView will specify its own padding.
        int padding = context.getResources().getDimensionPixelSize(R.dimen.qs_quick_tile_padding);
        mIconFrame = new FrameLayout(context);
        mStrokeWidthActive = context.getResources()
                .getDimension(com.android.internal.R.dimen.config_qsTileStrokeWidthActive);
        mStrokeWidthInactive = context.getResources()
                .getDimension(com.android.internal.R.dimen.config_qsTileStrokeWidthInactive);
        int size = context.getResources().getDimensionPixelSize(R.dimen.qs_quick_tile_size);
        addView(mIconFrame, new LayoutParams(size, size));
        mBg = new ImageView(getContext());
        Path path = new Path(PathParser.createPathFromPathData(
                context.getResources().getString(ICON_MASK_ID)));
        float pathSize = AdaptiveIconDrawable.MASK_SIZE;
        PathShape p = new PathShape(path, pathSize, pathSize);
        ShapeDrawable d = new ShapeDrawable(p);
        d.setTintList(ColorStateList.valueOf(Color.TRANSPARENT));
        float backgroundStrokeWidth = context.getResources()
                .getDimension(R.dimen.qs_tile_icon_background_stroke_width);
        if (backgroundStrokeWidth > 0) {
            d.getPaint().setStyle(Paint.Style.STROKE);
            d.getPaint().setStrokeWidth(backgroundStrokeWidth);
        }
        int bgSize = context.getResources().getDimensionPixelSize(R.dimen.qs_tile_background_size);
        d.setIntrinsicHeight(bgSize);
        d.setIntrinsicWidth(bgSize);
        mBg.setImageDrawable(d);
        FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(bgSize, bgSize, Gravity.CENTER);
        mIconFrame.addView(mBg, lp);
        mBg.setLayoutParams(lp);
        mIcon = icon;
        FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT,
                Gravity.CENTER);
        mIconFrame.addView(mIcon, params);
        mIconFrame.setClipChildren(false);
        mIconFrame.setClipToPadding(false);

        mTileBackground = newTileBackground();
        if (mTileBackground instanceof RippleDrawable) {
            setRipple((RippleDrawable) mTileBackground);
        }
        setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
        setBackground(mTileBackground);

        mColorActive = Utils.getColorAttrDefaultColor(context,
                com.android.internal.R.attr.colorAccentPrimary);
        mColorInactive = Utils.getColorAttrDefaultColor(context, R.attr.offStateColor);

        setPadding(0, 0, 0, 0);
        setClipChildren(false);
        setClipToPadding(false);
        mCollapsedView = collapsedView;
        setFocusable(true);
    }

    public View getBgCircle() {
        return mBg;
    }

    protected Drawable newTileBackground() {
        final int[] attrs = new int[]{android.R.attr.selectableItemBackgroundBorderless};
        final TypedArray ta = getContext().obtainStyledAttributes(attrs);
        final Drawable d = ta.getDrawable(0);
        ta.recycle();
        return d;
    }

    private void setRipple(RippleDrawable tileBackground) {
        mRipple = tileBackground;
        if (getWidth() != 0) {
            updateRippleSize();
        }
    }

    protected void updateRippleSize() {
        // center the touch feedback on the center of the icon, and dial it down a bit
        final int cx = mIconFrame.getMeasuredWidth() / 2 + mIconFrame.getLeft();
        final int cy = mIconFrame.getMeasuredHeight() / 2 + mIconFrame.getTop();
        final int rad = (int) (mIcon.getHeight() * .85f);
        mRipple.setHotspotBounds(cx - rad, cy - rad, cx + rad, cy + rad);
    }

    @Override
    public void init(QSTile tile) {
        init(v -> tile.click(), v -> tile.secondaryClick(), view -> {
            tile.longClick(this);
            return true;
        });
    }

    public void init(OnClickListener click, OnClickListener secondaryClick,
            OnLongClickListener longClick) {
        setOnClickListener(click);
        setOnLongClickListener(longClick);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        super.onLayout(changed, l, t, r, b);
        if (mRipple != null) {
            updateRippleSize();
        }
    }

    @Override
    public boolean hasOverlappingRendering() {
        // Avoid layers for this layout - we don't need them.
        return false;
    }

    /**
     * Update the accessibility order for this view.
     *
     * @param previousView the view which should be before this one
     * @return the last view in this view which is accessible
     */
    public View updateAccessibilityOrder(View previousView) {
        setAccessibilityTraversalAfter(previousView.getId());
        return this;
    }

    public void onStateChanged(QSTile.State state) {
        mHandler.obtainMessage(H.STATE_CHANGED, state).sendToTarget();
    }

    private void updateStrokeShapeWidth(QSTile.State state) {
        Resources resources = getContext().getResources();
        if (!(mBg.getDrawable() instanceof ShapeDrawable)) {
            return;
        }
        ShapeDrawable d = (ShapeDrawable) mBg.getDrawable();
        d.getPaint().setStyle(Paint.Style.FILL);
        switch (state.state) {
            case Tile.STATE_INACTIVE:
                if (mStrokeWidthInactive >= 0) {
                    d.getPaint().setStyle(Paint.Style.STROKE);
                    d.getPaint().setStrokeWidth(mStrokeWidthInactive);
                }
                break;
            case Tile.STATE_ACTIVE:
                if (mStrokeWidthActive >= 0) {
                    d.getPaint().setStyle(Paint.Style.STROKE);
                    d.getPaint().setStrokeWidth(mStrokeWidthActive);
                }
                break;
        }
    }

    protected void handleStateChanged(QSTile.State state) {
        updateStrokeShapeWidth(state);
        int circleColor = getCircleColor(state.state);
        boolean allowAnimations = animationsEnabled();
        if (circleColor != mCircleColor) {
            if (allowAnimations) {
                ValueAnimator animator = ValueAnimator.ofArgb(mCircleColor, circleColor)
                        .setDuration(QS_ANIM_LENGTH);
                animator.addUpdateListener(animation -> mBg.setImageTintList(ColorStateList.valueOf(
                        (Integer) animation.getAnimatedValue())));
                animator.start();
            } else {
                QSIconViewImpl.setTint(mBg, circleColor);
            }
            mCircleColor = circleColor;
        }

        mShowRippleEffect = state.showRippleEffect;
        setClickable(state.state != Tile.STATE_UNAVAILABLE);
        setLongClickable(state.handlesLongClick);
        mIcon.setIcon(state, allowAnimations);
        setContentDescription(state.contentDescription);
        final StringBuilder stateDescription = new StringBuilder();
        String text = "";
        switch (state.state) {
            case Tile.STATE_UNAVAILABLE:
                text = mContext.getString(R.string.tile_unavailable);
                break;
            case Tile.STATE_INACTIVE:
                if (state instanceof QSTile.BooleanState) {
                    text = mContext.getString(R.string.switch_bar_off);
                }
                break;
            case Tile.STATE_ACTIVE:
                if (state instanceof QSTile.BooleanState) {
                    text = mContext.getString(R.string.switch_bar_on);
                }
                break;
            default:
                break;
        }
        if (!TextUtils.isEmpty(text)) {
            stateDescription.append(text);
            if (TextUtils.isEmpty(state.secondaryLabel)) {
                state.secondaryLabel = text;
            }
        }
        if (!TextUtils.isEmpty(state.stateDescription)) {
            stateDescription.append(", ");
            stateDescription.append(state.stateDescription);
            if (mLastState != INVALID && state.state == mLastState
                    && !state.stateDescription.equals(mLastStateDescription)) {
                mStateDescriptionDeltas = state.stateDescription;
            }
        }
        setStateDescription(stateDescription.toString());
        mLastState = state.state;
        mLastStateDescription = state.stateDescription;

        mAccessibilityClass =
                state.state == Tile.STATE_UNAVAILABLE ? null : state.expandedAccessibilityClassName;
        if (state instanceof QSTile.BooleanState) {
            boolean newState = ((BooleanState) state).value;
            if (mTileState != newState) {
                mTileState = newState;
            }
        }
    }

    /* The view should not be animated if it's not on screen and no part of it is visible.
     */
    protected boolean animationsEnabled() {
        if (!isShown()) {
            return false;
        }
        if (getAlpha() != 1f) {
            return false;
        }
        getLocationOnScreen(mLocInScreen);
        return mLocInScreen[1] >= -getHeight();
    }

    protected int getCircleColor(int state) {
        switch (state) {
            case Tile.STATE_ACTIVE:
                return mColorActive;
            case Tile.STATE_INACTIVE:
            case Tile.STATE_UNAVAILABLE:
                return mColorInactive;
            default:
                Log.e(TAG, "Invalid state " + state);
                return 0;
        }
    }

    @Override
    public void setClickable(boolean clickable) {
        super.setClickable(clickable);
        setBackground(clickable && mShowRippleEffect ? mRipple : null);
    }

    @Override
    public int getDetailY() {
        return getTop() + getHeight() / 2;
    }

    public QSIconView getIcon() {
        return mIcon;
    }

    public View getIconWithBackground() {
        return mIconFrame;
    }

    @Override
    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
        super.onInitializeAccessibilityEvent(event);
        if (!TextUtils.isEmpty(mAccessibilityClass)) {
            event.setClassName(mAccessibilityClass);
        }
        if (event.getContentChangeTypes() == CONTENT_CHANGE_TYPE_STATE_DESCRIPTION
                && mStateDescriptionDeltas != null) {
            event.getText().add(mStateDescriptionDeltas);
            mStateDescriptionDeltas = null;
        }
    }

    @Override
    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
        super.onInitializeAccessibilityNodeInfo(info);
        // Clear selected state so it is not announce by talkback.
        info.setSelected(false);
        if (!TextUtils.isEmpty(mAccessibilityClass)) {
            info.setClassName(mAccessibilityClass);
            if (Switch.class.getName().equals(mAccessibilityClass)) {
                String label = getResources().getString(
                        mTileState ? R.string.switch_bar_on : R.string.switch_bar_off);
                // Set the text here for tests in
                // android.platform.test.scenario.sysui.quicksettings. Can be removed when
                // UiObject2 has a new getStateDescription() API and tests are updated.
                info.setText(label);
                info.setChecked(mTileState);
                info.setCheckable(true);
                if (isLongClickable()) {
                    info.addAction(
                            new AccessibilityNodeInfo.AccessibilityAction(
                                    AccessibilityNodeInfo.AccessibilityAction
                                            .ACTION_LONG_CLICK.getId(),
                                    getResources().getString(
                                            R.string.accessibility_long_click_tile)));
                }
            }
        }
    }

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder(getClass().getSimpleName()).append('[');
        sb.append("locInScreen=(" + mLocInScreen[0] + ", " + mLocInScreen[1] + ")");
        sb.append(", iconView=" + mIcon.toString());
        sb.append(", tileState=" + mTileState);
        sb.append("]");
        return sb.toString();
    }

    private class H extends Handler {
        private static final int STATE_CHANGED = 1;

        public H() {
            super(Looper.getMainLooper());
        }

        @Override
        public void handleMessage(Message msg) {
            if (msg.what == STATE_CHANGED) {
                handleStateChanged((QSTile.State) msg.obj);
            }
        }
    }
}