/*
 * Copyright (c) 2010-2012, Paul Merlin.
 * Copyright (c) 2012, Niclas Hedhman.
 *
 * 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.apache.zest.library.scheduler.timeline;

import java.util.List;
import org.apache.zest.api.common.UseDefaults;
import org.apache.zest.api.entity.Queryable;
import org.apache.zest.api.mixin.Mixins;
import org.apache.zest.api.property.Property;
import org.apache.zest.api.value.ValueComposite;
import org.apache.zest.library.scheduler.Scheduler;

/**
 * Record in {@link Scheduler}'s {@link Timeline}.
 *
 * {@link TimelineRecord}s are {@link Comparable} regarding their {@link TimelineRecord#timestamp()}.
 */
@Mixins( TimelineRecord.Mixin.class )
public interface TimelineRecord
    extends Comparable<TimelineRecord>, ValueComposite
{
    /**
     * @return Identity of the associated {@link Scheduler}
     */
    Property<String> scheduleIdentity();

    /**
     * @return Timestamp of this record
     */
    Property<Long> timestamp();

    /**
     * @return Name of the associated {@link org.apache.zest.library.scheduler.Task}
     */
    Property<String> taskName();

    /**
     * @return Tags of the associated {@link org.apache.zest.library.scheduler.Task}
     */
    @UseDefaults
    Property<List<String>> taskTags();

    Property<TimelineRecordStep> step();

    /**
     * @return Details text of this record
     */
    @Queryable( false )
    @UseDefaults
    Property<String> details();

    abstract class Mixin
        implements TimelineRecord
    {

        @Override
        public int compareTo( TimelineRecord o )
        {
            return timestamp().get().compareTo( o.timestamp().get() );
        }
    }

}