/**

 * Back 2 Browser Bytecode Translator Copyright (C) 2012 Jaroslav Tulach

 * <jaroslav.tulach@apidesign.org>

 *

 * This program is free software: you can redistribute it and/or modify it under

 * the terms of the GNU General Public License as published by the Free Software

 * Foundation, version 2 of the License.

 *

 * This program 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 for more

 * details.

 *

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

 * this program. Look for COPYING file in the top folder. If not, see

 * http://opensource.org/licenses/GPL-2.0.

 */

package org.apidesign.bck2brwsr.htmlpage;

import java.util.HashMap;

import java.util.Set;

import net.java.html.canvas.Dimension;

import net.java.html.canvas.Image;

import net.java.html.canvas.ImageData;

import net.java.html.canvas.Style;

import net.java.html.canvas.Style.Color;

import net.java.html.canvas.Style.LinearGradient;

import net.java.html.canvas.Style.Pattern;

import net.java.html.canvas.Style.RadialGradient;

import net.java.html.canvas.spi.GraphicsEnvironment;

import org.apidesign.bck2brwsr.core.JavaScriptBody;

import org.apidesign.bck2brwsr.htmlpage.api.Canvas;

/**

 *

 * @author Anton Epple <toni.epple@eppleton.de>

 */

public class HTML5GraphicsEnvironment implements GraphicsEnvironment {

    Object context;

    Canvas canvas;

    public HTML5GraphicsEnvironment(Object contextImpl, Canvas canvas) {

        this.context = contextImpl;

        this.canvas = canvas;

    }

    @JavaScriptBody(args = {"centerx", "centery", "radius", "startangle", "endangle", "ccw"},

            body = "this._context().arc(centerx,centery, radius, startangle, endangle,ccw);")

    @Override

    public native void arc(double centerX,

            double centerY,

            double startAngle,

            double radius,

            double endAngle,

            boolean ccw);

    @JavaScriptBody(args = {"x1", "y1", "x2", "y2", "r"},

            body = "this._context().arcTo(x1,y1,x2,y2,r);")

    @Override

    public native void arcTo(double x1,

            double y1,

            double x2,

            double y2,

            double r);

    @JavaScriptBody(args = {"x", "y"},

            body = "return this._context().isPointInPath(x,y);")

    @Override

    public native boolean isPointInPath(double x, double y);

    @JavaScriptBody(args = {}, body = "this._context().fill();")

    @Override

    public native void fill();

    @JavaScriptBody(args = {}, body = "this._context().stroke();")

    @Override

    public native void stroke();

    @JavaScriptBody(args = {}, body = "this._context().beginPath();")

    @Override

    public native void beginPath();

    @JavaScriptBody(args = {}, body = "this._context().closePath();")

    @Override

    public native void closePath();

    @JavaScriptBody(args = {}, body = "this._context().clip();")

    @Override

    public native void clip();

    @JavaScriptBody(args = {"x", "y"}, body = "this._context().moveTo(x,y);")

    @Override

    public native void moveTo(double x, double y);

    @JavaScriptBody(args = {"x", "y"}, body = "this._context().lineTo(x,y);")

    @Override

    public native void lineTo(double x, double y);

    @JavaScriptBody(args = {"cpx", "cpy", "x", "y"}, body = "this._context().quadraticCurveTo(cpx,cpy,x,y);")

    @Override

    public native void quadraticCurveTo(double cpx, double cpy, double x, double y);

    @JavaScriptBody(args = {"cp1x", "cp1y", "cp2x", "cp2y", "x", "y"},

            body = "this._context().bezierCurveTo(cp1x,cp1y,cp2x,cp2y,x,y);")

    @Override

    public native void bezierCurveTo(double cp1x, double cp1y, double cp2x, double cp2y, double x, double y);

    @JavaScriptBody(args = {"x", "y", "width", "height"}, body = "this._context().fillRect(x,y,width,height);")

    @Override

    public native void fillRect(double x, double y, double width, double height);

    @JavaScriptBody(args = {"x", "y", "width", "height"}, body = "this._context().strokeRect(x,y,width,height);")

    @Override

    public native void strokeRect(double x, double y, double width, double height);

    @JavaScriptBody(args = {"x", "y", "width", "height"}, body = "this._context().clearRect(x,y,width,height);")

    @Override

    public native void clearRect(double x, double y, double width, double height);

    @JavaScriptBody(args = {"x", "y", "width", "height"}, body = "this._context().rect(x,y,width,height);")

    @Override

    public native void rect(double x, double y, double width, double height);

    @JavaScriptBody(args = {}, body = "this._context().save();")

    @Override

    public native void save();

    @JavaScriptBody(args = {}, body = "this._context().restore();")

    @Override

    public native void restore();

    @JavaScriptBody(args = {"angle"}, body = "this._context().rotate(angle);")

    @Override

    public native void rotate(double angle);

    @JavaScriptBody(args = {"a", "b", "c", "d", "e", "f"}, body = "this._context().transform(a,b,c,d,e,f);")

    @Override

    public native void transform(double a, double b, double c, double d, double e, double f);

    @JavaScriptBody(args = {"a", "b", "c", "d", "e", "f"}, body = "this._context().setTransform(a,b,c,d,e,f);")

    @Override

    public native void setTransform(double a, double b, double c, double d, double e, double f);

    @JavaScriptBody(args = {"x", "y"}, body = "this._context().translate(x,y);")

    @Override

    public native void translate(double x, double y);

    @JavaScriptBody(args = {"x", "y"}, body = "this._context().scale(x,y);")

    @Override

    public native void scale(double x, double y);

    @Override

    public Object drawImage(Image image, double x, double y, Object nativeImage) {

        if (nativeImage == null) {

            nativeImage = createImage(image.getSrc());

        }

        return drawImageImpl(context, nativeImage, x, y);

    }

    @Override

    public Object drawImage(Image image, double x, double y, double width, double height, Object nativeImage) {

        if (nativeImage == null) {

            nativeImage = createImage(image.getSrc());

        }

        return drawImageImpl(context, nativeImage, x, y, width, height);

    }

    @Override

    public Object drawImage(Image image, double sx, double sy, double sWidth, double sHeight, double x, double y, double width, double height, Object nativeImage) {

        if (nativeImage == null) {

            nativeImage = createImage(image.getSrc());

        }

        return drawImageImpl(context, nativeImage, sx, sy, sWidth, sHeight, x, y, width, height);

    }

    @JavaScriptBody(args = {"ctx", "img", "x", "y", "width", "height"}, body = "img.onload=function(){ctx.drawImage(img,x,y,width,height);};ctx.drawImage(img,x,y,width,height); return img;")

    private native static Object drawImageImpl(Object ctx, Object img, double x, double y, double width, double height);

    @JavaScriptBody(args = {"ctx", "img", "sx", "sy", "swidth", "sheight", "x", "y", "width", "height"}, body = "img.onload=function(){ctx.drawImage(img,sx,sy,swidth,sheight,x,y,width,height);}; ctx.drawImage(img,sx,sy,swidth,sheight,x,y,width,height); return img;")

    private native static Object drawImageImpl(Object ctx, Object img, double sx, double sy, double sWidth, double sHeight, double x, double y, double width, double height);

    @JavaScriptBody(args = {"ctx", "img", "x", "y"}, body = "img.onload=function(){ctx.drawImage(img,x,y);}; ctx.drawImage(img,x,y); return img;")

    private native static Object drawImageImpl(Object ctx, Object img, double x, double y);

    public Object setFillStyle(Style style, Object nativeStyle) {

        if (nativeStyle == null) {

            nativeStyle = createNativeStyle(style);

        }

        setFillStyleImpl(context, nativeStyle);

        return nativeStyle;

    }

    private Object createNativeStyle(Style style) {

        if (style instanceof RadialGradient) {

            RadialGradientWrapper gradient = createRadialGradientWrapper(

                    ((RadialGradient) style).getX0(),

                    ((RadialGradient) style).getY0(),

                    ((RadialGradient) style).getR0(),

                    ((RadialGradient) style).getX1(),

                    ((RadialGradient) style).getY1(),

                    ((RadialGradient) style).getR1());

            HashMap<Double, String> stops = ((LinearGradient) style).getStops();

            Set<Double> keySet = stops.keySet();

            for (Double double1 : keySet) {

                addColorStopImpl(style, double1, stops.get(double1));

            }

            return gradient;

        } else if (style instanceof LinearGradient) {

            LinearGradientWrapper gradient = createLinearGradientWrapper(

                    ((LinearGradient) style).getX0(),

                    ((LinearGradient) style).getY0(),

                    ((LinearGradient) style).getX1(),

                    ((LinearGradient) style).getY1());

            HashMap<Double, String> stops = ((LinearGradient) style).getStops();

            Set<Double> keySet = stops.keySet();

            for (Double double1 : keySet) {

                addColorStopImpl(style, double1, stops.get(double1));

            }

            return gradient;

        } else if (style instanceof Pattern) {

            return createPatternWrapper(((Pattern) style).getImageResource(), ((Pattern) style).getRepeat());

        } else if (style instanceof Color) {

            return ((Color) style)

                    .getAsString();

        }

        return null;

    }

    @JavaScriptBody(args = {"gradient", "position", "color"}, body =

            "gradient.addColorStop(position,color)")

    private static native void addColorStopImpl(Object gradient, double position, String color);

    @JavaScriptBody(args = {"context", "obj"}, body = "console.log('style: '+obj);context.fillStyle=obj;")

    private native void setFillStyleImpl(Object context, Object obj);

    @JavaScriptBody(args = {"style"}, body = "this._context().strokeStyle=style.valueOf();")

    public native void setStrokeStyle(String style);

    @Override

    public Object setStrokeStyle(Style style, Object nativeStyle) {

        if (nativeStyle == null) {

            nativeStyle = createNativeStyle(style);

        }

        setStrokeStyleImpl(context, nativeStyle);

        return nativeStyle;

    }

    @JavaScriptBody(args = {"context", "obj"}, body = "context.strokeStyle=obj;")

    private native void setStrokeStyleImpl(Object context, Object obj);

    @JavaScriptBody(args = {"color"}, body = "this._context().shadowColor=color.valueOf();")

    @Override

    public native void setShadowColor(String color);

    @JavaScriptBody(args = {"blur"}, body = "this._context().shadowBlur=blur;")

    @Override

    public native void setShadowBlur(double blur);

    @JavaScriptBody(args = {"x"}, body = "this._context().shadowOffsetX=x;")

    @Override

    public native void setShadowOffsetX(double x);

    @JavaScriptBody(args = {"y"}, body = "this._context().shadowOffsetY=y;")

    @Override

    public native void setShadowOffsetY(double y);

    @JavaScriptBody(args = {}, body = "return this._context().strokeStyle;")

    public native String getStrokeStyle();

    @JavaScriptBody(args = {}, body = "return this._context().shadowColor;")

    @Override

    public native String getShadowColor();

    @JavaScriptBody(args = {}, body = "return this._context().shadowBlur;")

    @Override

    public native double getShadowBlur();

    @JavaScriptBody(args = {}, body = "return this._context().shadowOffsetX;")

    @Override

    public native double getShadowOffsetX();

    @JavaScriptBody(args = {}, body = "return this._context().shadowOffsetY;")

    @Override

    public native double getShadowOffsetY();

    @JavaScriptBody(args = {}, body = "return this._context().lineCap;")

    @Override

    public native String getLineCap();

    @JavaScriptBody(args = {"style"}, body = "this._context().lineCap=style.valueOf();")

    @Override

    public native void setLineCap(String style);

    @JavaScriptBody(args = {}, body = "return this._context().lineJoin;")

    @Override

    public native String getLineJoin();

    @JavaScriptBody(args = {"style"}, body = "this._context().lineJoin=style.valueOf();")

    @Override

    public native void setLineJoin(String style);

    @JavaScriptBody(args = {}, body = "return this._context().lineWidth;")

    @Override

    public native double getLineWidth();

    @JavaScriptBody(args = {"width"}, body = "this._context().lineWidth=width;")

    @Override

    public native void setLineWidth(double width);

    @JavaScriptBody(args = {}, body = "return this._context().miterLimit;")

    @Override

    public native double getMiterLimit();

    @JavaScriptBody(args = {"limit"}, body = "this._context().miterLimit=limit;")

    @Override

    public native void setMiterLimit(double limit);

    @JavaScriptBody(args = {}, body = "return this._context().font;")

    @Override

    public native String getFont();

    @JavaScriptBody(args = {"font"}, body = "this._context().font=font.valueOf();")

    @Override

    public native void setFont(String font);

    @JavaScriptBody(args = {}, body = "return this._context().textAlign;")

    @Override

    public native String getTextAlign();

    @JavaScriptBody(args = {"textalign"}, body = "this._context().textAlign=textalign.valueOf();")

    @Override

    public native void setTextAlign(String textAlign);

    @JavaScriptBody(args = {}, body = "return this._context().textBaseline;")

    @Override

    public native String getTextBaseline();

    @JavaScriptBody(args = {"textbaseline"}, body = "this._context().textBaseline=textbaseline.valueOf();")

    @Override

    public native void setTextBaseline(String textbaseline);

    @JavaScriptBody(args = {"text", "x", "y"}, body = "this._context().fillText(text,x,y);")

//    @JavaScriptBody(args = {"text", "x", "y"}, body = "console.log(text);")

    @Override

    public native void fillText(String text, double x, double y);

    @JavaScriptBody(args = {"text", "x", "y", "maxwidth"}, body = "this._context().fillText(text,x,y,maxwidth);")

    @Override

    public void fillText(String text, double x, double y, double maxWidth) {

    }

    @Override

    public Dimension measureText(String text) {

        measureTextImpl(text);

        return new Dimension(1, 1);

    }

    @JavaScriptBody(args = {"text"},

            body = "return this._context().measureText(text);")

    private native Object measureTextImpl(String text);

    @JavaScriptBody(args = {"text", "x", "y"}, body = "this._context().strokeText(text,x,y);")

    @Override

    public native void strokeText(String text, double x, double y);

    @JavaScriptBody(args = {"text", "x", "y", "maxWidth"}, body = "this._context().strokeText(text,x,y,maxWidth);")

    @Override

    public native void strokeText(String text, double x, double y, double maxWidth);

    @Override

    public ImageData createPixelMap(double x, double y) {

        return new ImageDataWrapper(createPixelMapImpl(x, y));

    }

    @JavaScriptBody(args = {"x", "y"},

            body = "return this._context().createImageData(x,y);")

    private native Object createPixelMapImpl(double x, double y);

    @Override

    public ImageData createPixelMap(ImageData imageData) {

        return new ImageDataWrapper(createPixelMapImpl(imageData.getWidth(), imageData.getHeight()));

    }

    @Override

    public ImageData getPixelMap(double x, double y, double width, double height) {

        return new ImageDataWrapper(getPixelMapImpl(x, y, width, height));

    }

    @JavaScriptBody(args = {"x", "y", "width", "height"},

            body = "return this._context().getImageData(x,y,width,height);")

    private native Object getPixelMapImpl(double x, double y, double width, double height);

    @Override

    public void putPixelMap(ImageData imageData, double x, double y) {

        putPixelMapImpl(((ImageDataWrapper) imageData).object(), x, y);

    }

    @JavaScriptBody(args = {"imageData", "x", "y"},

            body = "this._context().putImageData(imageData,x,y);")

    private native void putPixelMapImpl(Object imageData, double x, double y);

    @Override

    public void putPixelMap(ImageData imageData, double x, double y, double dirtyx, double dirtyy, double dirtywidth, double dirtyheight) {

        putPixelMapImpl(((ImageDataWrapper) imageData).object(), x, y, dirtyx, dirtyy, dirtywidth, dirtyheight);

    }

    @JavaScriptBody(args = {"imageData", "x", "y", "dirtyx", "dirtyy", "dirtywidth", "dirtyheight"},

            body = "this._context().putImageData(imageData,x,y, dirtyx, dirtyy, dirtywidth,dirtyheight);")

    private native void putPixelMapImpl(Object imageData, double x, double y, double dirtyx, double dirtyy, double dirtywidth, double dirtyheight);

    @JavaScriptBody(args = {"alpha"}, body = "this._context().globalAlpha=alpha;")

    @Override

    public native void setGlobalAlpha(double alpha);

    @JavaScriptBody(args = {}, body = "return this._context().globalAlpha;")

    @Override

    public native double getGlobalAlpha();

    @JavaScriptBody(args = {"operation"}, body = "this._context().globalCompositeOperation=operation.valueOf();")

    @Override

    public native void setGlobalCompositeOperation(String operation);

    @JavaScriptBody(args = {}, body = "return this._context().globalCompositeOperation;")

    @Override

    public native String getGlobalCompositeOperation();

    public LinearGradientWrapper createLinearGradientWrapper(double x0, double y0, double x1, double y1) {

        return new LinearGradientWrapper(createLinearGradientImpl(context, x0, y0, x1, y1));

    }

    @JavaScriptBody(args = {"context", "x0", "y0", "x1", "y1"}, body = "return context.createLinearGradient(x0,y0,x1,y1);")

    private native Object createLinearGradientImpl(Object context, double x0, double y0, double x1, double y1);

    public PatternWrapper createPatternWrapper(Image image, String repeat) {

        return new PatternWrapper(createPatternImpl(context, image, repeat));

    }

    @JavaScriptBody(args = {"context", "image", "repeat"}, body = "return context.createPattern(image, repeat);")

    private static native Object createPatternImpl(Object context, Image image, String repeat);

    public RadialGradientWrapper createRadialGradientWrapper(double x0, double y0, double r0, double x1, double y1, double r1) {

        return new RadialGradientWrapper(createRadialGradientImpl(context, x0, y0, r0, x1, y1, r1));

    }

    @JavaScriptBody(args = {"context", "x0", "y0", "r0", "x1", "y1", "r1"}, body = "return context.createRadialGradient(x0,y0,r0,x1,y1,r1);")

    private static native Object createRadialGradientImpl(Object context, double x0, double y0, double r0, double x1, double y1, double r1);

//    @JavaScriptBody(args = {"path"}, body = "var b = new Image(); b.src=path; return b;")

//    public native Image getImageForPathImpl(String path);

    @Override

    public int getHeight() {

        return canvas.getHeight();

    }

    @Override

    public int getWidth() {

        return canvas.getWidth();

    }

    @Override

    public void setHeight(int height) {

        canvas.setHeight(height);

    }

    @Override

    public void setWidth(int width) {

        canvas.setWidth(width);

    }

    @JavaScriptBody(args = {"src"}, body = "var image = new Image(); image.src = src; return image;")

    private static native Object createImage(String src);

    @Override

    public int getWidth(Image image, Object nativeImage) {

        if (nativeImage == null) {

            nativeImage = createImage(image.getSrc());

        }

        return getWidth(nativeImage);

    }

    @JavaScriptBody(args = {"nativeImage"}, body = "return nativeImage.naturalWidth;")

    private static native int getWidth(Object nativeImage);

    @Override

    public int getHeight(Image image, Object nativeImage) {

        if (nativeImage == null) {

            nativeImage = createImage(image.getSrc());

        }

        return getHeight(nativeImage);

    }

    @JavaScriptBody(args = {"nativeImage"}, body = "return nativeImage.naturalHeight;")

    private static native int getHeight(Object nativeImage);

    @Override

    public Object mergeImages(Image a, Image b, Object cachedA, Object cachedB) {

        return mergeImages(cachedA, cachedB);

    }

    @JavaScriptBody(args = {"img1", "img2"}, body = "var canvas = document.createElement('img');\n"

            + "var context = canvas.getContext(\"2d\");\n"

            + "var width = img1.width;\n"

            + "var height = img1.height;\n"

            + "canvas.width = width;\n"

            + "canvas.height = height;\n"

            + "context.drawImage(img1, 0, 0);\n"

            + "context.drawImage(img2, 0, 0);\n"

            + "url = canvas.toDataURL();\n"

            + "var resultImage = document.createElement('img');\n"

            + "resultImage.src=url;\n"

            + "return resultImage;")

    public static native Object mergeImages(Object img1, Object img2);

}