/*

 * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.lwawt.macosx;

import sun.awt.AWTAccessor;

import sun.awt.IconInfo;

import sun.java2d.SunGraphics2D;

import sun.java2d.SurfaceData;

import sun.java2d.opengl.CGLLayer;

import sun.lwawt.LWWindowPeer;

import sun.lwawt.PlatformEventNotifier;

import sun.lwawt.SecurityWarningWindow;

import java.awt.*;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

import java.lang.ref.WeakReference;

public final class CWarningWindow extends CPlatformWindow

        implements SecurityWarningWindow, PlatformEventNotifier {

    private static class Lock {}

    private final Lock lock = new Lock();

    private static final int SHOWING_DELAY = 300;

    private static final int HIDING_DELAY = 2000;

    private Rectangle bounds = new Rectangle();

    private final WeakReference<LWWindowPeer> ownerPeer;

    private final Window ownerWindow;

    /**

     * Animation stage.

     */

    private volatile int currentIcon = 0;

    /* -1 - uninitialized.

     * 0 - 16x16

     * 1 - 24x24

     * 2 - 32x32

     * 3 - 48x48

     */

    private int currentSize = -1;

    private static IconInfo[][] icons;

    private static IconInfo getSecurityIconInfo(int size, int num) {

        synchronized (CWarningWindow.class) {

            if (icons == null) {

                icons = new IconInfo[4][3];

                icons[0][0] = new IconInfo(sun.awt.AWTIcon32_security_icon_bw16_png.security_icon_bw16_png);

                icons[0][1] = new IconInfo(sun.awt.AWTIcon32_security_icon_interim16_png.security_icon_interim16_png);

                icons[0][2] = new IconInfo(sun.awt.AWTIcon32_security_icon_yellow16_png.security_icon_yellow16_png);

                icons[1][0] = new IconInfo(sun.awt.AWTIcon32_security_icon_bw24_png.security_icon_bw24_png);

                icons[1][1] = new IconInfo(sun.awt.AWTIcon32_security_icon_interim24_png.security_icon_interim24_png);

                icons[1][2] = new IconInfo(sun.awt.AWTIcon32_security_icon_yellow24_png.security_icon_yellow24_png);

                icons[2][0] = new IconInfo(sun.awt.AWTIcon32_security_icon_bw32_png.security_icon_bw32_png);

                icons[2][1] = new IconInfo(sun.awt.AWTIcon32_security_icon_interim32_png.security_icon_interim32_png);

                icons[2][2] = new IconInfo(sun.awt.AWTIcon32_security_icon_yellow32_png.security_icon_yellow32_png);

                icons[3][0] = new IconInfo(sun.awt.AWTIcon32_security_icon_bw48_png.security_icon_bw48_png);

                icons[3][1] = new IconInfo(sun.awt.AWTIcon32_security_icon_interim48_png.security_icon_interim48_png);

                icons[3][2] = new IconInfo(sun.awt.AWTIcon32_security_icon_yellow48_png.security_icon_yellow48_png);

            }

        }

        final int sizeIndex = size % icons.length;

        return icons[sizeIndex][num % icons[sizeIndex].length];

    }

    public CWarningWindow(final Window _ownerWindow, final LWWindowPeer _ownerPeer) {

        super();

        this.ownerPeer = new WeakReference<>(_ownerPeer);

        this.ownerWindow = _ownerWindow;

        initialize(null, null, _ownerPeer.getPlatformWindow());

        setOpaque(false);

        String warningString = ownerWindow.getWarningString();

        if (warningString != null) {

            contentView.setToolTip(ownerWindow.getWarningString());

        }

        updateIconSize();

    }

    /**

     * @param x,y,w,h coordinates of the untrusted window

     */

    public void reposition(int x, int y, int w, int h) {

        final Point2D point = AWTAccessor.getWindowAccessor().

                calculateSecurityWarningPosition(ownerWindow, x, y, w, h);

        setBounds((int)point.getX(), (int)point.getY(), getWidth(), getHeight());

    }

    public void setVisible(boolean visible, boolean doSchedule) {

        synchronized (taskLock) {

            cancelTasks();

            if (visible) {

                if (isVisible()) {

                    currentIcon = 0;

                } else {

                    currentIcon = 2;

                }

                showHideTask = new ShowingTask();

                LWCToolkit.performOnMainThreadAfterDelay(showHideTask, 50);

            } else {

                if (!isVisible()) {

                    return;

                }

                showHideTask = new HidingTask();

                if (doSchedule) {

                    LWCToolkit.performOnMainThreadAfterDelay(showHideTask, HIDING_DELAY);

                } else {

                    LWCToolkit.performOnMainThreadAfterDelay(showHideTask, 50);

                }

            }

        }

    }

    @Override

    public void notifyIconify(boolean iconify) {

    }

    @Override

    public void notifyZoom(boolean isZoomed) {

    }

    @Override

    public void notifyExpose(final Rectangle r) {

        repaint();

    }

    @Override

    public void notifyReshape(int x, int y, int w, int h) {

    }

    @Override

    public void notifyUpdateCursor() {

    }

    @Override

    public void notifyActivation(boolean activation, LWWindowPeer opposite) {

    }

    @Override

    public void notifyNCMouseDown() {

    }

    @Override

    public void notifyMouseEvent(int id, long when, int button, int x, int y,

                                 int absX, int absY, int modifiers,

                                 int clickCount, boolean popupTrigger,

                                 byte[] bdata) {

        LWWindowPeer peer = ownerPeer.get();

        if (id == MouseEvent.MOUSE_EXITED) {

            if (peer != null) {

                peer.updateSecurityWarningVisibility();

            }

        } else if(id == MouseEvent.MOUSE_ENTERED) {

            if (peer != null) {

                peer.updateSecurityWarningVisibility();

            }

        }

    }

    public Rectangle getBounds() {

        synchronized (lock) {

            return bounds.getBounds();

        }

    }

    @Override

    public boolean isVisible() {

        synchronized (lock) {

            return visible;

        }

    }

    @Override

    public void setVisible(boolean visible) {

        synchronized (lock) {

            execute(ptr -> {

                // Actually show or hide the window

                if (visible) {

                    CWrapper.NSWindow.orderFront(ptr);

                } else {

                    CWrapper.NSWindow.orderOut(ptr);

                }

            });

            this.visible = visible;

            // Manage parent-child relationship when showing

            if (visible) {

                // Order myself above my parent

                if (owner != null && owner.isVisible()) {

                    owner.execute(ownerPtr -> {

                        execute(ptr -> {

                            CWrapper.NSWindow.orderWindow(ptr,

                        });

                    });

                    // do not allow security warning to be obscured by other windows

                    applyWindowLevel(ownerWindow);

                }

            }

        }

    }

    @Override

    public void notifyMouseWheelEvent(long when, int x, int y, int absX,

                                      int absY, int modifiers, int scrollType,

                                      int scrollAmount, int wheelRotation,

                                      double preciseWheelRotation,

                                      byte[] bdata) {

    }

    @Override

    public void notifyKeyEvent(int id, long when, int modifiers, int keyCode,

                               char keyChar, int keyLocation) {

    }

    protected int getInitialStyleBits() {

        int styleBits = 0;

        CPlatformWindow.SET(styleBits, CPlatformWindow.UTILITY, true);

        return styleBits;

    }

    protected void deliverMoveResizeEvent(int x, int y, int width, int height,

                                          boolean byUser) {

        boolean isResize;

        synchronized (lock) {

            isResize = (bounds.width != width || bounds.height != height);

            bounds = new Rectangle(x, y, width, height);

        }

        if (isResize) {

            replaceSurface();

        }

        super.deliverMoveResizeEvent(x, y, width, height, byUser);

    }

    protected CPlatformResponder createPlatformResponder() {

        return new CPlatformResponder(this, false);

    }

    protected CPlatformView createContentView() {

        return new CPlatformView() {

            public GraphicsConfiguration getGraphicsConfiguration() {

                LWWindowPeer peer = ownerPeer.get();

                return peer.getGraphicsConfiguration();

            }

            public Rectangle getBounds() {

                return CWarningWindow.this.getBounds();

            }

            public CGLLayer createCGLayer() {

                return new CGLLayer(null) {

                    public Rectangle getBounds() {

                        return CWarningWindow.this.getBounds();

                    }

                    public GraphicsConfiguration getGraphicsConfiguration() {

                        LWWindowPeer peer = ownerPeer.get();

                        return peer.getGraphicsConfiguration();

                    }

                    public boolean isOpaque() {

                        return false;

                    }

                };

            }

        };

    }

    @Override

    public void dispose() {

        cancelTasks();

        SurfaceData surfaceData = contentView.getSurfaceData();

        if (surfaceData != null) {

            surfaceData.invalidate();

        }

        super.dispose();

    }

    private void cancelTasks() {

        synchronized (taskLock) {

            if (showHideTask != null) {

                showHideTask.cancel();

                showHideTask = null;

            }

        }

    }

    private void updateIconSize() {

        int newSize = -1;

        if (ownerWindow != null) {

            Insets insets = ownerWindow.getInsets();

            int max = Math.max(insets.top, Math.max(insets.bottom,

                    Math.max(insets.left, insets.right)));

            if (max < 24) {

                newSize = 0;

            } else if (max < 32) {

                newSize = 1;

            } else if (max < 48) {

                newSize = 2;

            } else {

                newSize = 3;

            }

        }

        // Make sure we have a valid size

        if (newSize == -1) {

            newSize = 0;

        }

        synchronized (lock) {

            if (newSize != currentSize) {

                currentSize = newSize;

                IconInfo ico = getSecurityIconInfo(currentSize, 0);

                AWTAccessor.getWindowAccessor().setSecurityWarningSize(

            }

        }

    }

    private Graphics getGraphics() {

        SurfaceData sd = contentView.getSurfaceData();

        if (ownerWindow == null || sd == null) {

            return null;

        }

        return new SunGraphics2D(sd, SystemColor.windowText, SystemColor.window,

    }

    private void repaint() {

        final Graphics g = getGraphics();

        if (g != null) {

            try {

                ((Graphics2D) g).setComposite(AlphaComposite.Src);

                g.drawImage(getSecurityIconInfo().getImage(), 0, 0, null);

            } finally {

                g.dispose();

            }

        }

    }

    private void replaceSurface() {

        SurfaceData oldData = contentView.getSurfaceData();

        replaceSurfaceData();

        if (oldData != null && oldData != contentView.getSurfaceData()) {

            oldData.flush();

        }

    }

    private int getWidth() {

        return getSecurityIconInfo().getWidth();

    }

    private int getHeight() {

        return getSecurityIconInfo().getHeight();

    }

    private IconInfo getSecurityIconInfo() {

        return getSecurityIconInfo(currentSize, currentIcon);

    }

    private final Lock taskLock = new Lock();

    private CancelableRunnable showHideTask;

    private abstract static class CancelableRunnable implements Runnable {

        private volatile boolean perform = true;

        public final void cancel() {

            perform = false;

        }

        @Override

        public final void run() {

            if (perform) {

                perform();

            }

        }

        public abstract void perform();

    }

    private class HidingTask extends CancelableRunnable {

        @Override

        public void perform() {

            synchronized (lock) {

                setVisible(false);

            }

            synchronized (taskLock) {

                showHideTask = null;

            }

        }

    }

    private class ShowingTask extends CancelableRunnable {

        @Override

        public void perform() {

            synchronized (lock) {

                if (!isVisible()) {

                    setVisible(true);

                }

                repaint();

            }

            synchronized (taskLock) {

                if (currentIcon > 0) {

                    currentIcon--;

                    showHideTask = new ShowingTask();

                    LWCToolkit.performOnMainThreadAfterDelay(showHideTask, SHOWING_DELAY);

                } else {

                    showHideTask = null;

                }

            }

        }

    }

}