/*
 * Copyright 2009 ZXing authors
 *
 * 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.google.zxing.client.j2se;

import com.google.zxing.common.BitMatrix;

import java.io.File;
import java.io.OutputStream;
import java.io.IOException;

/**
 * @author
 */
public final class SvgImage {
  
  private final StringBuilder content;
  
  public String getContent() { 
    return content.toString();
  }
  public void setContent(String value) { 
    content.setLength(0); if (value != null) content.append(value);
  }
  
  public SvgImage() {
    content = new StringBuilder();
  }
  
  public SvgImage(String content) {
    this.content = new StringBuilder(content);
  }
  
  public String toString() {
    return content.toString();
  }
  
  void addHeader() {
    content.append("<?xml version=\"1.0\" standalone=\"no\"?>");
    content.append("<!-- Created with ZXing (http://code.google.com/p/zxing/) -->");
    content.append("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">");
  }
  
  void addEnd() {
    content.append("</svg>");
  }
  
  void addTag(int displaysizeX, int displaysizeY, int viewboxSizeX, int viewboxSizeY, SvgImageColor background, SvgImageColor fill) {
    
    if (displaysizeX <= 0 || displaysizeY <= 0)
    content.append(String.format("<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.2\" baseProfile=\"tiny\" viewBox=\"0 0 %d %d\" viewport-fill=\"rgb(%s)\" viewport-fill-opacity=\"%f\" fill=\"rgb(%s)\" fill-opacity=\"%f\" %s>",
    viewboxSizeX,
    viewboxSizeY,
    getColorRgb(background),
    convertAlpha(background),
    getColorRgb(fill),
    convertAlpha(fill),
    getBackgroundStyle(background)
    ));
    else
    content.append(String.format("<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.2\" baseProfile=\"tiny\" viewBox=\"0 0 %d %d\" viewport-fill=\"rgb(%s)\" viewport-fill-opacity=\"%f\" fill=\"rgb(%s)\" fill-opacity=\"%f\" %s width=\"%d\" height=\"%d\">",
    viewboxSizeX,
    viewboxSizeY,
    getColorRgb(background),
    convertAlpha(background),
    getColorRgb(fill),
    convertAlpha(fill),
    getBackgroundStyle(background),
    displaysizeX,
    displaysizeY));
  }
  
  void addRec(int posX, int posY, int width, int height) {
    content.append(String.format("<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:#000000;fill-opacity:1;stroke:none\"/>", posX, posY, width, height));
  }
  
  static double convertAlpha(SvgImageColor alpha) {
    return Math.round((((double)alpha.A) / (double)255));
  }
  
  static String getBackgroundStyle(SvgImageColor color) {
    double alpha = convertAlpha(color);
    return String.format("style=\"background-color:rgb(%d,%d,%d);background-color:rgba(%f);\"",
    color.R, color.G, color.B, alpha);
  }
  
  static String getColorRgb(SvgImageColor color) {
    return color.R + "," + color.G + "," + color.B;
  }
  
  static String getColorRgba(SvgImageColor color) {
    double alpha = convertAlpha(color);
    return color.R + "," + color.G + "," + color.B + "," + alpha;
  }
}