package jalview.io;

import jalview.api.FeatureRenderer;
import jalview.datamodel.AlignmentExportData;
import jalview.datamodel.SequenceI;
import jalview.gui.AlignViewport;
import jalview.gui.AlignmentPanel;
import jalview.gui.HTMLOptions;
import jalview.math.AlignmentDimension;
import jalview.util.MessageManager;

import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.io.File;
import java.io.FileOutputStream;

import org.jfree.graphics2d.svg.SVGGraphics2D;
import org.jfree.graphics2d.svg.SVGHints;

public class HtmlSvgOutput
{
  AlignViewport av;

  FeatureRenderer fr;
  AlignmentPanel ap;


  public HtmlSvgOutput(File file, AlignmentPanel ap)
  {
    this.av = ap.av;
    this.ap = ap;
    fr = ap.cloneFeatureRenderer();
    generateHtmlSvgOutput(file);
  }

  public void generateHtmlSvgOutput(File file)
  {
    try
    {
      if (file == null)
      {

      JalviewFileChooser chooser = getHTMLChooser();
      chooser.setFileView(new jalview.io.JalviewFileView());
      chooser.setDialogTitle(ap.alignFrame.getTitle());
      chooser.setToolTipText(MessageManager.getString("action.save"));
      int value = chooser.showSaveDialog(ap.alignFrame);

      if (value == jalview.io.JalviewFileChooser.APPROVE_OPTION)
      {
        jalview.bin.Cache.setProperty("LAST_DIRECTORY", chooser
                .getSelectedFile().getParent());
        file = chooser.getSelectedFile();
      }
      }

      AlignmentDimension aDimension = ap.getAlignmentDimension();
      SVGGraphics2D g1 = new SVGGraphics2D(aDimension.getWidth(),
              aDimension.getHeight());
      SVGGraphics2D g2 = new SVGGraphics2D(aDimension.getWidth(),
              aDimension.getHeight());

      String renderStyle = jalview.bin.Cache.getDefault("HTML_RENDERING",
              "Prompt each time");

      // If we need to prompt, and if the GUI is visible then
      // Prompt for rendering style
      if (renderStyle.equalsIgnoreCase("Prompt each time")
              && !(System.getProperty("java.awt.headless") != null && System
                      .getProperty("java.awt.headless").equals("true")))
      {
        HTMLOptions svgOption = new HTMLOptions();
        renderStyle = svgOption.getValue();

        if (renderStyle == null || svgOption.cancelled)
        {
          return;
        }
      }

      if (renderStyle.equalsIgnoreCase("lineart"))
      {
        g1.setRenderingHint(SVGHints.KEY_DRAW_STRING_TYPE,
                SVGHints.VALUE_DRAW_STRING_TYPE_VECTOR);
        g2.setRenderingHint(SVGHints.KEY_DRAW_STRING_TYPE,
                SVGHints.VALUE_DRAW_STRING_TYPE_VECTOR);
      }
      printUnwrapped(aDimension.getWidth(), aDimension.getHeight(), 0, g1,
              g2);

      String titleSvgData = g1.getSVGDocument();
      String alignSvgData = g2.getSVGDocument();
      String jsonData = null;
      boolean isEmbbedBioJSON = Boolean.valueOf(jalview.bin.Cache
              .getDefault("EXPORT_EMBBED_BIOJSON", "true"));
      if (isEmbbedBioJSON)
      {
        AlignmentExportData exportData = jalview.gui.AlignFrame
                .getAlignmentForExport(
              JSONFile.FILE_DESC, av);
      if (exportData.getSettings().isCancelled())
      {
        return;
      }
        jsonData = new FormatAdapter(ap, exportData.getSettings())
              .formatSequences(JSONFile.FILE_DESC, exportData
                      .getAlignment(), exportData.getOmitHidden(),
                        exportData.getStartEndPostions(),
                        av.getColumnSelection());
      }
      String htmlData = getHtml(titleSvgData, alignSvgData, jsonData);
      FileOutputStream out = new FileOutputStream(file);
      out.write(htmlData.getBytes());
      out.flush();
      out.close();
      if (!(System.getProperty("java.awt.headless") != null && System
              .getProperty("java.awt.headless").equals("true")))
      {
      jalview.util.BrowserLauncher.openURL("file:///" + file);
      }
    } catch (Exception e)
    {
      e.printStackTrace();
    }
  }
  
  static JalviewFileChooser getHTMLChooser()
  {
    return new jalview.io.JalviewFileChooser(
            jalview.bin.Cache.getProperty("LAST_DIRECTORY"), new String[]
            { "html" }, new String[]
            { "Hypertext Markup Language" }, "Hypertext Markup Language");
  }

  public int printUnwrapped(int pwidth, int pheight, int pi, Graphics... pg)
          throws PrinterException
  {
    int idWidth = ap.getVisibleIdWidth(false);
    FontMetrics fm = ap.getFontMetrics(av.getFont());
    int scaleHeight = av.getCharHeight() + fm.getDescent();

    pg[0].setColor(Color.white);
    pg[0].fillRect(0, 0, pwidth, pheight);
    pg[0].setFont(av.getFont());

    // //////////////////////////////////
    // / How many sequences and residues can we fit on a printable page?
    int totalRes = (pwidth - idWidth) / av.getCharWidth();
    int totalSeq = (pheight - scaleHeight) / av.getCharHeight() - 1;
    int pagesWide = (av.getAlignment().getWidth() / totalRes) + 1;

    // ///////////////////////////
    // / Only print these sequences and residues on this page
    int startRes;

    // ///////////////////////////
    // / Only print these sequences and residues on this page
    int endRes;

    // ///////////////////////////
    // / Only print these sequences and residues on this page
    int startSeq;

    // ///////////////////////////
    // / Only print these sequences and residues on this page
    int endSeq;
    startRes = (pi % pagesWide) * totalRes;
    endRes = (startRes + totalRes) - 1;

    if (endRes > (av.getAlignment().getWidth() - 1))
    {
      endRes = av.getAlignment().getWidth() - 1;
    }
    startSeq = (pi / pagesWide) * totalSeq;
    endSeq = startSeq + totalSeq;
    if (endSeq > av.getAlignment().getHeight())
    {
      endSeq = av.getAlignment().getHeight();
    }
    int pagesHigh = ((av.getAlignment().getHeight() / totalSeq) + 1)
            * pheight;
    if (av.isShowAnnotation())
    {
      pagesHigh += ap.getAnnotationPanel().adjustPanelHeight() + 3;
    }
    pagesHigh /= pheight;
    if (pi >= (pagesWide * pagesHigh))
    {
      return Printable.NO_SUCH_PAGE;
    }

    // draw Scale
    pg[1].translate(0, 0);
    ap.getScalePanel().drawScale(pg[1], startRes, endRes, pwidth - idWidth,
            scaleHeight);
    pg[1].translate(-idWidth, scaleHeight);

    // //////////////
    // Draw the ids
    Color currentColor = null;
    Color currentTextColor = null;
    pg[0].translate(0, scaleHeight);
    pg[0].setFont(ap.getIdPanel().getIdCanvas().getIdfont());
    SequenceI seq;
    for (int i = startSeq; i < endSeq; i++)
    {
      seq = av.getAlignment().getSequenceAt(i);
      if ((av.getSelectionGroup() != null)
              && av.getSelectionGroup().getSequences(null).contains(seq))
      {
        currentColor = Color.gray;
        currentTextColor = Color.black;
      }
      else
      {
        currentColor = av.getSequenceColour(seq);
        currentTextColor = Color.black;
      }
      pg[0].setColor(currentColor);
      pg[0].fillRect(0, (i - startSeq) * av.getCharHeight(), idWidth,
              av.getCharHeight());
      pg[0].setColor(currentTextColor);
      int xPos = 0;
      if (av.isRightAlignIds())
      {
        fm = pg[0].getFontMetrics();
        xPos = idWidth
                - fm.stringWidth(seq.getDisplayId(av.getShowJVSuffix()))
                - 4;
      }
      pg[0].drawString(
              seq.getDisplayId(av.getShowJVSuffix()),
              xPos,
              (((i - startSeq) * av.getCharHeight()) + av.getCharHeight())
                      - (av.getCharHeight() / 5));
    }
    pg[0].setFont(av.getFont());
    pg[0].translate(idWidth, 0);

    // draw main sequence panel
    pg[1].translate(idWidth, 0);
    ap.getSeqPanel().seqCanvas.drawPanel(pg[1], startRes, endRes, startSeq,
            endSeq, 0);
    if (av.isShowAnnotation() && (endSeq == av.getAlignment().getHeight()))
    {
      // draw annotation label - need to offset for current scroll position
      int offset = -ap.getAlabels().getScrollOffset();
      pg[0].translate(0, offset);
      pg[0].translate(-idWidth - 3,
              (endSeq - startSeq) * av.getCharHeight() + 3);
      ap.getAlabels().drawComponent(pg[0], idWidth);
      pg[0].translate(idWidth + 3, 0);
      pg[0].translate(0, -offset);

      // draw annotation - need to offset for current scroll position
      pg[1].translate(0, offset);
      pg[1].translate(-idWidth - 3,
              (endSeq - startSeq) * av.getCharHeight() + 3);
      pg[1].translate(idWidth + 3, 0);
      ap.getAnnotationPanel().renderer.drawComponent(
              ap.getAnnotationPanel(), av, pg[1], -1, startRes, endRes + 1);
      pg[1].translate(0, -offset);
    }

    return Printable.PAGE_EXISTS;
  }
  
  private String getHtml(String titleSvg, String alignmentSvg,
          String jsonData)
  {
    StringBuilder htmlSvg = new StringBuilder();
    htmlSvg.append("<html>\n");
    if (jsonData != null)
    {
      htmlSvg.append("<button onclick=\"javascipt:openJalviewUsingCurrentUrl();\">Launch in Jalview</button>");
      htmlSvg.append("<input type=\"hidden\" name=\"seqData\" id=\"seqData\" value='"
              + jsonData + "'>");
    }
    htmlSvg.append("\n<style type=\"text/css\"> "
            + "div.parent{ width:100%;<!-- overflow: auto; -->}\n"
            + "div.titlex{ width:11%; float: left; }\n"
            + "div.align{ width:89%; float: right; }\n"
            + ".sub-category-container {overflow-y: scroll; overflow-x: hidden; width: 100%; height: 100%;}\n"
            + "object {pointer-events: none;}"
            + "</style>");
    htmlSvg.append("<div>");
    htmlSvg.append(
"<div class=\"titlex\">");
    htmlSvg.append(
"<div class=\"sub-category-container\"> ")
            .append(titleSvg)
            .append("</div>")
            .append("</div>\n\n<!-- ========================================================================================== -->\n\n");
    htmlSvg.append(
"<div class=\"align\" >");
    htmlSvg.append(
            "<div class=\"sub-category-container\"> <div style=\"overflow-x: scroll;\">")
            .append(alignmentSvg)
.append("</div></div>")
            .append("</div>");
    htmlSvg.append("</div>");

    htmlSvg.append("<script language=\"JavaScript\" type=\"text/javascript\" src=\"http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js\"></script>\n"
            + "<script language=\"JavaScript\" type=\"text/javascript\"  src=\"//ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js\"></script>\n"
            + "<script>\n"
            + "var subCatContainer = $(\".sub-category-container\");\n"
            + "subCatContainer.scroll(\nfunction() {\n"
            + "subCatContainer.scrollTop($(this).scrollTop());\n});\n");

    htmlSvg.append("</script>\n");

    // javascript for launching file in Jalview

    htmlSvg.append("<script language=\"JavaScript\">\n");
    htmlSvg.append("function openJalviewUsingCurrentUrl(){\n");
    htmlSvg.append("    var json = JSON.parse(document.getElementById(\"seqData\").value);\n");
    htmlSvg.append("    var jalviewVersion = json['appSettings'].version;\n");
    htmlSvg.append("    var url = json['appSettings'].webStartUrl;\n");
    htmlSvg.append("    var myForm = document.createElement(\"form\");\n\n");
    htmlSvg.append("    var heap = document.createElement(\"input\");\n");
    htmlSvg.append("    heap.setAttribute(\"name\", \"jvm-max-heap\") ;\n");
    htmlSvg.append("    heap.setAttribute(\"value\", \"2G\");\n\n");
    htmlSvg.append("    var target = document.createElement(\"input\");\n");
    htmlSvg.append("    target.setAttribute(\"name\", \"open\");\n");
    htmlSvg.append("    target.setAttribute(\"value\", document.URL);\n\n");
    htmlSvg.append("    var jvVersion = document.createElement(\"input\");\n");
    htmlSvg.append("    jvVersion.setAttribute(\"name\", \"version\") ;\n");
    htmlSvg.append("    jvVersion.setAttribute(\"value\", jalviewVersion);\n\n");
    htmlSvg.append("    myForm.action = url;\n");
    htmlSvg.append("    myForm.appendChild(heap);\n");
    htmlSvg.append("    myForm.appendChild(target);\n");
    htmlSvg.append("    myForm.appendChild(jvVersion);\n");
    htmlSvg.append("    document.body.appendChild(myForm);\n");
    htmlSvg.append("    myForm.submit() ;\n");
    htmlSvg.append("    document.body.removeChild(myForm);\n");
    htmlSvg.append("}\n");
    htmlSvg.append("</script>\n");
    htmlSvg.append("</hmtl>");
    return htmlSvg.toString();
  }
}