/*
 * #%L
 * Bio-Formats Plugins for ImageJ: a collection of ImageJ plugins including the
 * Bio-Formats Importer, Bio-Formats Exporter, Bio-Formats Macro Extensions,
 * Data Browser and Stack Slicer.
 * %%
 * Copyright (C) 2006 - 2015 Open Microscopy Environment:
 *   - Board of Regents of the University of Wisconsin-Madison
 *   - Glencoe Software, Inc.
 *   - University of Dundee
 * %%
 * 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, either version 2 of the 
 * License, or (at your option) any later version.
 * 
 * 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.  If not, see
 * <http://www.gnu.org/licenses/gpl-2.0.html>.
 * #L%
 */

package loci.plugins.util;

import ij.Prefs;

import loci.formats.ClassList;
import loci.formats.IFormatReader;
import loci.formats.ImageReader;
import loci.formats.in.ND2Reader;
import loci.formats.in.PictReader;
import loci.formats.in.QTReader;
import loci.formats.in.SDTReader;
import loci.formats.in.TiffDelegateReader;

/**
 * Utility methods for ImageJ preferences for Bio-Formats plugins.
 */
public final class LociPrefs {

  // -- Constants --

  public static final String PREF_READER_ENABLED = "bioformats.enabled";
  public static final String PREF_READER_WINDOWLESS = "bioformats.windowless";

  public static final String PREF_ND2_NIKON = "bioformats.nd2.nikon";
  public static final String PREF_PICT_QTJAVA = "bioformats.pict.qtjava";
  public static final String PREF_QT_QTJAVA = "bioformats.qt.qtjava";
  public static final String PREF_SDT_INTENSITY = "bioformats.sdt.intensity";
  public static final String PREF_TIFF_IMAGEIO = "bioformats.tiff.imageio";

  // -- Constructor --

  private LociPrefs() { }

  // -- Utility methods --

  /**
   * Creates an image reader according to the current configuration settings,
   * including which format readers are currently enabled, as well as
   * format-specific configuration settings.
   */
  public static ImageReader makeImageReader() {
    ClassList<IFormatReader> defaultClasses =
      ImageReader.getDefaultReaderClasses();
    Class<? extends IFormatReader>[] c = defaultClasses.getClasses();

    // include only enabled classes
    ClassList<IFormatReader> enabledClasses =
      new ClassList<IFormatReader>(IFormatReader.class);
    for (int i=0; i<c.length; i++) {
      boolean on = LociPrefs.isReaderEnabled(c[i]);
      if (on) enabledClasses.addClass(c[i]);
    }
    ImageReader reader = new ImageReader(enabledClasses);

    // toggle reader-specific options
    boolean nd2Nikon = LociPrefs.isND2Nikon();
    boolean pictQTJava = LociPrefs.isPictQTJava();
    boolean qtQTJava = LociPrefs.isQTQTJava();
    boolean sdtIntensity = LociPrefs.isSDTIntensity();
    boolean tiffImageIO = LociPrefs.isTiffImageIO();
    IFormatReader[] r = reader.getReaders();
    for (int i=0; i<r.length; i++) {
      if (r[i] instanceof ND2Reader) {
        ND2Reader nd2 = (ND2Reader) r[i];
        nd2.setLegacy(nd2Nikon);
      }
      else if (r[i] instanceof PictReader) {
        PictReader pict = (PictReader) r[i];
        pict.setLegacy(pictQTJava);
      }
      else if (r[i] instanceof QTReader) {
        QTReader qt = (QTReader) r[i];
        qt.setLegacy(qtQTJava);
      }
      else if (r[i] instanceof SDTReader) {
        SDTReader sdt = (SDTReader) r[i];
        sdt.setIntensity(sdtIntensity);
      }
      else if (r[i] instanceof TiffDelegateReader) {
        TiffDelegateReader tiff = (TiffDelegateReader) r[i];
        tiff.setLegacy(tiffImageIO);
      }
    }

    return reader;
  }

  /**
   * Gets whether windowless mode should be used when
   * opening this reader's currently initialized dataset.
   */
  public static boolean isWindowless(IFormatReader r) {
    return getPref(PREF_READER_WINDOWLESS, r.getClass(), false);
  }

  public static boolean isReaderEnabled(Class<? extends IFormatReader> c) {
    return getPref(PREF_READER_ENABLED, c, true);
  }

  public static boolean isND2Nikon() {
    return Prefs.get(PREF_ND2_NIKON, false);
  }

  public static boolean isPictQTJava() {
    return Prefs.get(PREF_PICT_QTJAVA, false);
  }

  public static boolean isQTQTJava() {
    return Prefs.get(PREF_QT_QTJAVA, false);
  }

  public static boolean isSDTIntensity() {
    return Prefs.get(PREF_SDT_INTENSITY, false);
  }

  public static boolean isTiffImageIO() {
    return Prefs.get(PREF_TIFF_IMAGEIO, false);
  }

  // -- Helper methods --

  private static boolean getPref(String pref,
    Class<? extends IFormatReader> c, boolean defaultValue)
  {
    String n = c.getName();
    String readerName = n.substring(n.lastIndexOf(".") + 1, n.length() - 6);
    String key = pref + "." + readerName;
    return Prefs.get(key, defaultValue);
  }

}