package geniusweb.bidspace.pareto;

import static org.junit.Assert.assertEquals;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import com.fasterxml.jackson.databind.ObjectMapper;

import geniusweb.profile.Profile;
import geniusweb.profile.utilityspace.LinearAdditive;
import geniusweb.profile.utilityspace.LinearAdditiveUtilitySpace;

/**
 * Test pareto functionality with some real profiles in an e2e test
 */
@RunWith(Parameterized.class)
public class ParetoE2Etest {
	private final static ObjectMapper jackson = new ObjectMapper();

	@Parameters
	public static Collection<Object[]> data() {
		return Arrays.asList(new Object[][] {
				{ "src/test/resources/jobs/jobs1.json",
						"src/test/resources/jobs/jobs2.json", 18 },
				{ "src/test/resources/7issues/7issues1.json",
						"src/test/resources/7issues/7issues2.json", 351 } });
	}

	private Path path1;
	private Path path2;
	private int expectedNrPoints;

	public ParetoE2Etest(String profile1file, String profile2file,
			int expectedNr) {
		this.path1 = Paths.get(profile1file);
		this.path2 = Paths.get(profile2file);
		this.expectedNrPoints = expectedNr;
	}

	@Test
	public void checkGenerciPareto() throws IOException {
		String file1 = new String(Files.readAllBytes(path1));
		LinearAdditiveUtilitySpace profile1 = (LinearAdditiveUtilitySpace) jackson
				.readValue(file1, Profile.class);
		String file2 = new String(Files.readAllBytes(path2));
		LinearAdditiveUtilitySpace profile2 = (LinearAdditiveUtilitySpace) jackson
				.readValue(file2, Profile.class);

		List<LinearAdditive> profiles = new LinkedList<>();
		profiles.add(profile1);
		profiles.add(profile2);
		ParetoFrontier linaddpareto = new ParetoLinearAdditive(profiles);
		System.out.println("linaddpareto result" + linaddpareto);
		assertEquals(expectedNrPoints, linaddpareto.getPoints().size());

		if (expectedNrPoints < 40) {
			ParetoFrontier generalpareto = new GenericPareto(profiles);
			assertEquals(generalpareto.getPoints(), linaddpareto.getPoints());
			System.out.println("generalpareto result" + generalpareto);
		} else {
			System.out.println("Skippedn generalpareto - expected too slow");
		}
	}

}