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/*
 * RED5 Open Source Media Server - https://github.com/Red5/
 * 
 * Copyright 2006-2016 by respective authors (see below). All rights reserved.
 * 
 * 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 org.red5.server.api.stream.support;

import org.red5.server.api.stream.IPlayItem;
import org.red5.server.messaging.IMessageInput;

/**
 * Simple playlist item implementation
 */
public class SimplePlayItem implements IPlayItem, Comparable {

    private long created = System.nanoTime();

    /**
     * Playlist item name
     */
    protected final String name;

    /**
     * Start mark
     */
    protected final long start;

    /**
     * Length - amount to play
     */
    protected final long length;

    /**
     * Message source
     */
    protected IMessageInput msgInput;

    private SimplePlayItem(String name) {
        this.name = name;
        this.start = -2L;
        this.length = -1L;
    }

    private SimplePlayItem(String name, long start, long length) {
        this.name = name;
        this.start = start;
        this.length = length;
    }

    /**
     * Returns play item length in milliseconds
     * 
     * @return Play item length in milliseconds
     */
    public long getLength() {
        return length;
    }

    /**
     * Returns IMessageInput object. IMessageInput is an endpoint for a consumer to connect.
     * 
     * @return IMessageInput object
     */
    public IMessageInput getMessageInput() {
        return msgInput;
    }

    /**
     * Returns item name
     * 
     * @return item name
     */
    public String getName() {
        return name;
    }

    /**
     * Returns boolean value that specifies whether item can be played
     */
    public long getStart() {
        return start;
    }

    /**
     * Alias for getMessageInput
     * 
     * @return Message input source
     */
    public IMessageInput getMsgInput() {
        return msgInput;
    }

    /**
     * Setter for message input
     *
     * @param msgInput
     *            Message input
     */
    public void setMsgInput(IMessageInput msgInput) {
        this.msgInput = msgInput;
    }

    /**
     * @return the created
     */
    public long getCreated() {
        return created;
    }

    /**
     * @param created
     *            the created to set
     */
    public void setCreated(long created) {
        this.created = created;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        result = prime * result + (int) (start ^ (start >>> 32));
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        SimplePlayItem other = (SimplePlayItem) obj;
        if (name == null) {
            if (other.name != null)
                return false;
        } else if (!name.equals(other.name))
            return false;
        if (start != other.start)
            return false;
        return true;
    }

    @Override
    public int compareTo(SimplePlayItem that) {
        if (created > that.getCreated()) {
            return -1;
        } else if (created < that.getCreated()) {
            return 1;
        }
        return 0;
    }

    /**
     * Builder for SimplePlayItem
     * 
     * @param name
     *            name
     * @return play item instance
     */
    public static SimplePlayItem build(String name) {
        SimplePlayItem playItem = new SimplePlayItem(name);
        return playItem;
    }

    /**
     * Builder for SimplePlayItem
     * 
     * @param name
     *            name
     * @param start
     *            start
     * @param length
     *            length
     * @return play item instance
     */
    public static SimplePlayItem build(String name, long start, long length) {
        SimplePlayItem playItem = new SimplePlayItem(name, start, length);
        return playItem;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "SimplePlayItem [created=" + created + ", name=" + name + ", start=" + start + ", length=" + length + "]";
    }

}