package jalview.io;

import jalview.exceptions.NoFileSelectedException;
import jalview.gui.AlignViewport;
import jalview.gui.AlignmentPanel;
import jalview.gui.FeatureRenderer;
import jalview.util.MessageManager;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;

public class BioJsHTMLOutput
{
  private AlignViewport av;


  public BioJsHTMLOutput(AlignmentPanel ap,
          FeatureRenderer fr1)
  {

    if (ap != null)
    {

      this.av = ap.av;
      av.setFeatureRenderer(new FeatureRenderer(ap));
    }
    exportJalviewAlignmentAsBioJsHtmlFile();
  }

  private void exportJalviewAlignmentAsBioJsHtmlFile()
  {
    try
    {
      String outputFile = getOutputFile();
      String jalviewAlignmentJson = JSONFile.getJSONData(av);
      String bioJSTemplateString = getBioJsTemplateAsString(this);
      String generatedBioJsWithJalviewAlignmentAsJson = bioJSTemplateString
              .replaceAll(
"#sequenceData#", jalviewAlignmentJson)
              .toString();

      PrintWriter out = new java.io.PrintWriter(new java.io.FileWriter(
              outputFile));
      out.print(generatedBioJsWithJalviewAlignmentAsJson);
      out.flush();
      out.close();
      jalview.util.BrowserLauncher.openURL("file:///" + outputFile);
    } catch (NoFileSelectedException ex)
    {
      // do noting if no file was selected
    } catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  public String getOutputFile() throws NoFileSelectedException
  {
    String selectedFile = null;
    JalviewFileChooser jvFileChooser = new JalviewFileChooser(
            jalview.bin.Cache.getProperty("LAST_DIRECTORY"), new String[]
            { "html" }, new String[]
            { "HTML files" }, "HTML files");
    jvFileChooser.setFileView(new JalviewFileView());

    // TODO uncomment when supported by MassageManager
    jvFileChooser.setDialogTitle(MessageManager
            .getString("label.save_as_biojs_html"));
    jvFileChooser.setDialogTitle("save as BioJs HTML");
    jvFileChooser.setToolTipText(MessageManager.getString("action.save"));

    int fileChooserOpt = jvFileChooser.showSaveDialog(null);
    if (fileChooserOpt == JalviewFileChooser.APPROVE_OPTION)
    {
      jalview.bin.Cache.setProperty("LAST_DIRECTORY", jvFileChooser
              .getSelectedFile().getParent());
      selectedFile = jvFileChooser.getSelectedFile().getPath();
    }
    else
    {
      throw new NoFileSelectedException("No file was selected.");
    }
    return selectedFile;
  }


  public static String getBioJsTemplateAsString(Object currentObj)
          throws IOException
  {
    InputStreamReader isReader = null;
    BufferedReader buffReader = null;
    StringBuilder sb = new StringBuilder();
    URL url = currentObj.getClass().getResource(
            "/templates/BioJSTemplate.txt");
    if (url != null)
    {
      try
      {
        isReader = new InputStreamReader(url.openStream());
        buffReader = new BufferedReader(isReader);
        String line;
        String lineSeparator = System.getProperty("line.separator");
        while ((line = buffReader.readLine()) != null)
        {
          sb.append(line).append(lineSeparator);
        }

      } catch (Exception ex)
      {
        ex.printStackTrace();
      } finally
      {
        if (isReader != null)
        {
          isReader.close();
        }

        if (buffReader != null)
        {
          buffReader.close();
        }
      }
    }
    return sb.toString();
  }
}