/*
 * Hibernate Search, full-text search for your domain model
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.search.test.performance.task;

import static org.hibernate.search.test.performance.scenario.TestContext.ASSERT_QUERY_RESULTS;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.apache.lucene.search.Query;
import org.hibernate.search.FullTextSession;
import org.hibernate.search.test.performance.model.Book;
import org.hibernate.search.test.performance.scenario.TestContext;

/**
 * @author Tomas Hradec
 */
public class QueryBooksBySummaryTask extends AbstractTask {

	private static final String[] PHRASES = new String[] {
			"software development career",
			"agile software craftsmanship",
			"When programming teams buy into TDD",
			"Lisa Crispin",
			"time-consuming process",
			"continuous integration",
			"Linus Torvalds",
			"configuration management tool Puppet",
			"Ruby",
			"the core model-view-controller (MVC) architectural",
			"JavaScript-based platform",
			"server-side development with Node",
			"ASP.NET MVC 4",
			"Pro C# 5.0",
			"Windows Presentation Foundation",
			"Visual Studio 2012 Professional",
			"Windows Phone, WindowsRT",
			"jQuery Mobile",
			"Spring Framework",
			"Jason Van Zyl",
			"Ant as the build tool",
			"Subversion",
			"1970s",
			"bash shell",
			"Pocket Reference",
			"most experienced system administrators",
			"GNU Emacs",
			"Perl bible",
			"Python's fundamentals",
	};

	public QueryBooksBySummaryTask(TestContext ctx) {
		super( ctx );
	}

	@Override
	@SuppressWarnings("unchecked")
	protected void execute(FullTextSession fts) {
		long bookCount = ctx.bookIdCounter.get();
		String phrase = PHRASES[(int) ( bookCount % PHRASES.length )];

		Query q = fts.getSearchFactory()
				.buildQueryBuilder()
				.forEntity( Book.class )
				.get()
				.phrase()
				.withSlop( 3 )
				.onField( "summary" )
				.sentence( phrase )
				.createQuery();

		List<Book> result = fts.createFullTextQuery( q, Book.class ).list();

		if ( ASSERT_QUERY_RESULTS ) {
			assertResult( result, phrase );
			assertResultSize( result, phrase, bookCount );
		}
	}

	private void assertResult(List<Book> result, String phrase) {
		for ( Book book : result ) {
			assertTrue( "QueryBooksBySummaryTask: phrase=" + phrase + ", summary=" + StringUtils.substring( book.getSummary(), 0, 50 ),
					StringUtils.containsIgnoreCase( book.getSummary(), phrase ) );
		}
	}

	private void assertResultSize(List<Book> result, String phrase, long estimatedBooksCount) {
		long estimatedBooksCountPerSummary = estimatedBooksCount / InsertBookTask.SUMMARIES.length;
		long tolerance = 2 * TestContext.THREADS_COUNT;

		if ( result.size() < ( estimatedBooksCountPerSummary - tolerance )
				|| result.size() > ( estimatedBooksCountPerSummary + tolerance ) ) {
			fail( "QueryBooksBySummaryTask: phrase=" + phrase + ", actual=" + result.size() + ", estimate=" + estimatedBooksCountPerSummary );
		}
	}

}