/**

  * 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.lang.reflect.InvocationTargetException;

 import java.lang.reflect.Method;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Iterator;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import org.apidesign.bck2brwsr.core.JavaScriptOnly;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 public final class KOList<T> extends ArrayList<T> {

     private final String name;

     private final String[] deps;

     private Knockout model;

     private Runnable onchange;

     public KOList(String name, String... deps) {

         this.name = name;

         this.deps = deps;

     }

     public void assign(Knockout model) {

         if (this.model != model) {

             this.model = model;

             notifyChange();

         }

     }

     public KOList<T> onChange(Runnable r) {

         if (this.onchange != null) {

             throw new IllegalStateException();

         }

         this.onchange = r;

         return this;

     }

     @Override

     public boolean add(T e) {

         boolean ret = super.add(e);

         notifyChange();

         return ret;

     }

     @Override

     public boolean addAll(Collection<? extends T> c) {

         boolean ret = super.addAll(c);

         notifyChange();

         return ret;

     }

     @Override

     public boolean addAll(int index, Collection<? extends T> c) {

         boolean ret = super.addAll(index, c);

         notifyChange();

         return ret;

     }

     @Override

     public boolean remove(Object o) {

         boolean ret = super.remove(o);

         notifyChange();

         return ret;

     }

     @Override

     public void clear() {

         super.clear();

         notifyChange();

     }

     @Override

     public boolean removeAll(Collection<?> c) {

         boolean ret = super.removeAll(c);

         notifyChange();

         return ret;

     }

     @Override

     public boolean retainAll(Collection<?> c) {

         boolean ret = super.retainAll(c);

         notifyChange();

         return ret;

     }

     @Override

     public T set(int index, T element) {

         T ret = super.set(index, element);

         notifyChange();

         return ret;

     }

     @Override

     public void add(int index, T element) {

         super.add(index, element);

         notifyChange();

     }

     @Override

     public T remove(int index) {

         T ret = super.remove(index);

         notifyChange();

         return ret;

     }

     @Override

     public String toString() {

         Iterator<T> it = iterator();

         if (!it.hasNext()) {

             return "[]";

         }

         String sep = "";

         StringBuilder sb = new StringBuilder();

         sb.append('[');

         while (it.hasNext()) {

             T t = it.next();

             sb.append(sep);

             sb.append(ConvertTypes.toJSON(t));

             sep = ",";

         }

         sb.append(']');

         return sb.toString();

     }

     @JavaScriptOnly(name = "koArray", value = "function() { return this.toArray___3Ljava_lang_Object_2(); }")

     private static native int koArray();

     public Object koData() {

         Object[] arr = toArray();

         Method toKO = null;

         for (int i = 0; i < arr.length; i++) {

             if (arr[i] == null) {

                 continue;

             }

             if (toKO == null || toKO.getDeclaringClass() != arr[i].getClass()) {

                 try {

                     toKO = arr[i].getClass().getDeclaredMethod("koData");

                     toKO.setAccessible(true);

                 } catch (NoSuchMethodException ex) {

                     LOG.log(Level.FINE, "No koData conversion for " + arr[i], ex);

                     toKO = null;

                 }

             }

             if (toKO != null) {

                 try {

                     Object prev = arr[i];

                     arr[i] = toKO.invoke(arr[i]);

                     LOG.log(Level.FINER, "{0}th element {1} replaced by {2}", new Object[]{i, prev, arr[i]});

                 } catch (IllegalAccessException | InvocationTargetException ex) {

                     LOG.log(Level.SEVERE, "Problems invoking koData on " + arr[i], ex);

                 }

             }

         }

         return Knockout.toArray(arr);

     }

     private static final Logger LOG = Logger.getLogger(KOList.class.getName());

     private void notifyChange() {

         Knockout m = model;

         if (m != null) {

             m.valueHasMutated(name);

             for (String dependant : deps) {

                 m.valueHasMutated(dependant);

             }

         }

         Runnable r = onchange;

         if (r != null) {

             r.run();

         }

     }

     @Override

     public KOList clone() {

         KOList ko = (KOList)super.clone();

         ko.model = null;

         return ko;

     }

 }