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/*
 * Copyright 2010-2012 Luca Molino (molino.luca--at--gmail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.orientechnologies.orient.object.enumerations;

import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import com.orientechnologies.orient.core.record.ORecord;

public class OObjectEnumLazyMap extends HashMap implements Serializable,
		OLazyObjectEnumSerializer {
	private static final long					serialVersionUID	= -8606432090996808181L;

	private final ORecord					sourceRecord;
	private final Map	underlying;
	private boolean										converted					= false;
	private final Class					enumClass;

	public OObjectEnumLazyMap(final Class iEnumClass, final ORecord iSourceRecord, final Map iRecordMap) {
		super();
		this.sourceRecord = iSourceRecord;
		this.underlying = iRecordMap;
		converted = iRecordMap.isEmpty();
		this.enumClass = iEnumClass;
	}

	public OObjectEnumLazyMap(final Class iEnumClass, final ORecord iSourceRecord, final Map iRecordMap,
			final Map iSourceMap) {
		this(iEnumClass, iSourceRecord, iRecordMap);
		putAll(iSourceMap);
	}

	@Override
	public int size() {
		return underlying.size();
	}

	@Override
	public boolean isEmpty() {
		return underlying.isEmpty();
	}

	@Override
	public boolean containsKey(final Object k) {
		return underlying.containsKey(k);
	}

	@Override
	public boolean containsValue(final Object o) {
		boolean underlyingContains = underlying.containsValue(o.toString());
		return underlyingContains || super.containsValue(o);
	}

	@Override
	public Object put(final Object iKey, final Object e) {
		setDirty();
		underlying.put(iKey, ((TYPE) e).name());
		return super.put(iKey, e);
	}

	@Override
	public Object remove(final Object iKey) {
		underlying.remove((String) iKey);
		setDirty();
		return super.remove(iKey);
	}

	@Override
	public void clear() {
		converted = true;
		underlying.clear();
		super.clear();
		setDirty();
	}

	public boolean isConverted() {
		return converted;
	}

	@Override
	public String toString() {
		return underlying.toString();
	}

	@Override
	public Set> entrySet() {
		convertAll();
		return super.entrySet();
	}

	@Override
	public Object get(final Object iKey) {
		convert(iKey);
		return super.get(iKey);
	}

	@Override
	public Set keySet() {
		convertAll();
		return underlying.keySet();
	}

	@Override
	public void putAll(final Map iMap) {
		for (java.util.Map.Entry e : iMap.entrySet()) {
			put(e.getKey(), e.getValue());
		}
	}

	@Override
	public Collection values() {
		convertAll();
		return super.values();
	}

	public void setDirty() {
		if (sourceRecord != null)
			sourceRecord.setDirty();
	}

	/**
	 * Assure that the requested key is converted.
	 */
	private void convert(final Object iKey) {
		if (converted)
			return;

		if (super.containsKey(iKey))
			return;

		Object o = underlying.get(String.valueOf(iKey));
		if (o instanceof Number)
			super.put(iKey, enumClass.getEnumConstants()[((Number) o).intValue()]);
		else
			super.put(iKey, Enum.valueOf(enumClass, o.toString()));
	}

	public void detach() {
		convertAll();
	}

	/**
	 * Converts all the items
	 */
	protected void convertAll() {
		if (converted)
			return;

		for (java.util.Map.Entry e : underlying.entrySet()) {
			if (e.getValue() instanceof Number)
				super.put(e.getKey(), enumClass.getEnumConstants()[((Number) e.getValue()).intValue()]);
			else
				super.put(e.getKey(), Enum.valueOf(enumClass, e.getValue().toString()));
		}

		converted = true;
	}

}