/*
 * Copyright 2007 Yusuke Yamamoto
 *
 * 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 twitter4j.internal.json;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import twitter4j.HashtagEntity;
import twitter4j.TwitterException;

/**
 * A data class representing one single Hashtag entity.
 * 
 * @author Yusuke Yamamoto - yusuke at mac.com
 * @since Twitter4J 2.1.9
 */
/* package */class HashtagEntityJSONImpl implements HashtagEntity {

	/**
	 * 
	 */
	private static final long serialVersionUID = 2514471410110223225L;
	private int start = -1;
	private int end = -1;
	private String text;

	/* For serialization purposes only. */
	/* package */HashtagEntityJSONImpl() {

	}

	/* package */HashtagEntityJSONImpl(final int start, final int end, final String text) {
		super();
		this.start = start;
		this.end = end;
		this.text = text;
	}

	/* package */HashtagEntityJSONImpl(final JSONObject json) throws TwitterException {
		super();
		init(json);
	}

	@Override
	public boolean equals(final Object o) {
		if (this == o) return true;
		if (o == null || getClass() != o.getClass()) return false;

		final HashtagEntityJSONImpl that = (HashtagEntityJSONImpl) o;

		if (end != that.end) return false;
		if (start != that.start) return false;
		if (text != null ? !text.equals(that.text) : that.text != null) return false;

		return true;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public int getEnd() {
		return end;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public int getStart() {
		return start;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public String getText() {
		return text;
	}

	@Override
	public int hashCode() {
		int result = start;
		result = 31 * result + end;
		result = 31 * result + (text != null ? text.hashCode() : 0);
		return result;
	}

	@Override
	public String toString() {
		return "HashtagEntityJSONImpl{" + "start=" + start + ", end=" + end + ", text='" + text + '\'' + '}';
	}

	private void init(final JSONObject json) throws TwitterException {
		try {
			final JSONArray indicesArray = json.getJSONArray("indices");
			start = indicesArray.getInt(0);
			end = indicesArray.getInt(1);

			if (!json.isNull("text")) {
				text = json.getString("text");
			}
		} catch (final JSONException jsone) {
			throw new TwitterException(jsone);
		}
	}
}