/*
 *    Fernflower - The Analytical Java Decompiler
 *    http://www.reversed-java.com
 *
 *    (C) 2008 - 2010, Stiver
 *
 *    This software is NEITHER public domain NOR free software 
 *    as per GNU License. See license.txt for more details.
 *
 *    This software is distributed WITHOUT ANY WARRANTY; without 
 *    even the implied warranty of MERCHANTABILITY or FITNESS FOR 
 *    A PARTICULAR PURPOSE. 
 */

package org.jetbrains.java.decompiler.util;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;

public class VBStyleCollection<E, K> extends ArrayList<E> {
	
	private HashMap<K, Integer> map = new HashMap<K, Integer>();
	
	private ArrayList<K> lstKeys = new ArrayList<K>();
	
	public VBStyleCollection() {
		super();
	}
	
	public VBStyleCollection(int initialCapacity) {
		super(initialCapacity);
		lstKeys = new ArrayList<K>(initialCapacity);
		map = new HashMap<K, Integer>(initialCapacity);
	}
	
	public VBStyleCollection(Collection<E> c) {
		super(c);
	}
	
	public boolean add(E element) {
		lstKeys.add(null);
		super.add(element);
		return true;
	}
	
	public boolean remove(Object element) {   // TODO: error on void remove(E element) 
		throw new RuntimeException("not implemented!");
	}
	
	public boolean addAll(Collection<? extends E> c) {
		for(int i=c.size()-1;i>=0;i--) {
			lstKeys.add(null);
		}
		return super.addAll(c);
	}

	public void addAllWithKey(VBStyleCollection<E, K> c) {
		for(int i=0;i<c.size();i++) {
			addWithKey(c.get(i), c.getKey(i));
		}
	}

	public void addAllWithKey(Collection<E> elements, Collection<K> keys) {
		int index = super.size();

		for(K key : keys) {
			map.put(key, index++);
		}

		super.addAll(elements);
		lstKeys.addAll(keys);
	}
	
	public void addWithKey(E element, K key) {
		map.put(key, super.size());
		super.add(element);
		lstKeys.add(key);
	}

	// TODO: speed up the method
	public E putWithKey(E element, K key) {
		Integer index = map.get(key);
		if (index == null) {
			addWithKey(element, key);
		} else {
			return super.set(index, element);
		}
		return null;
	}
	
	public void add(int index, E element) {
		addToListIndex(index, 1);
		lstKeys.add(index, null);
		super.add(index, element);
	}
	
	public void addWithKeyAndIndex(int index, E element, K key) {
		addToListIndex(index, 1);
		map.put(key, new Integer(index));
		super.add(index, element);
		lstKeys.add(index, key);
	}
	
	public void removeWithKey(K key) {
		int index = ((Integer) map.get(key)).intValue();
		addToListIndex(index + 1, -1);
		super.remove(index);
		lstKeys.remove(index);
		map.remove(key);
	}
	
	public E remove(int index) {
		addToListIndex(index + 1, -1);
		Object obj = lstKeys.get(index);
		if (obj != null) {
			map.remove(obj);
		}
		lstKeys.remove(index);
		return super.remove(index);
	}
	
	public E getWithKey(K key) {
		Integer index = map.get(key);
		if (index == null) {
			return null;
		}
		return super.get(index.intValue());
	}

	public int getIndexByKey(K key) {
		return map.get(key).intValue();
	}
	
	public E getLast() {
		return super.get(super.size()-1);
	}
	
	public boolean containsKey(K key) {
		return map.containsKey(key);
	}
	
	public void clear() {
		map.clear();
		lstKeys.clear();
		super.clear();
	}
	
	public VBStyleCollection<E, K> clone() {
		VBStyleCollection<E, K> c = new VBStyleCollection<E, K>();
		c.addAll(new ArrayList<E>(this));
		c.setMap(new HashMap<K, Integer>(map));
		c.setLstKeys(new ArrayList<K>(lstKeys));
		return c;
	}
	
	public void swap(int index1, int index2) {
		
		Collections.swap(this, index1, index2);
		Collections.swap(lstKeys, index1, index2);
		
		K key = lstKeys.get(index1);
		if(key!=null) {
			map.put(key, new Integer(index1));
		}
		
		key = lstKeys.get(index2);
		if(key!=null) {
			map.put(key, new Integer(index2));
		}
		
	}
	
	public HashMap<K, Integer> getMap() {
		return map;
	}
	
	public void setMap(HashMap<K, Integer> map) {
		this.map = map;
	}
	
	public K getKey(int index) {
		return lstKeys.get(index);
	}
	
	public ArrayList<K> getLstKeys() {
		return lstKeys;
	}
	
	public void setLstKeys(ArrayList<K> lstKeys) {
		this.lstKeys = lstKeys;
	}
	
	private void addToListIndex(int index, int diff) {
		for (int i = lstKeys.size() - 1; i >= index; i--) {
			K obj = lstKeys.get(i);
			if (obj != null) {
				map.put(obj, new Integer(i + diff));
			}
		}
	}
	
}