/**
 * This file is a part of Angry IP Scanner source code,
 * see http://www.angryip.org/ for more information.
 * Licensed under GPLv2.
 */
package net.azib.ipscan.core;

import net.azib.ipscan.core.values.*;
import org.junit.Test;

import java.net.InetAddress;
import java.net.UnknownHostException;

import static java.util.Arrays.asList;
import static java.util.Arrays.sort;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

/**
 * ScanningResultComparatorTest
 *
 * @author Anton Keks
 */
public class ScanningResultComparatorTest {
	ScanningResultComparator comparator = new ScanningResultComparator();
	
	@Test
	public void compareDifferentTypes() throws Exception {
		comparator.byIndex(0, true);

		// nulls are the same as n/a 
		assertTrue(comparator.compare(res("a"), res((String)null)) < 0);
		assertTrue(comparator.compare(res((Integer)null), res(12)) > 0);
		
		// n/s > n/a, so that n/s are always at the end of sorted data, preceded by n/a
		assertTrue(comparator.compare(res(NotAvailable.VALUE), res(NotAvailable.VALUE)) == 0);
		assertTrue(comparator.compare(res(NotScanned.VALUE), res(NotAvailable.VALUE)) > 0);
		assertTrue(comparator.compare(res(NotAvailable.VALUE), res(NotScanned.VALUE)) < 0);
		
		// n/a and n/s are at the end
		assertTrue(comparator.compare(res(125), res(NotScanned.VALUE)) < 0);
		assertTrue(comparator.compare(res(9090), res(NotAvailable.VALUE)) < 0);
		
		assertTrue(comparator.compare(res(9090), res(new NumericRangeList(asList(9090), false))) == 0);
		assertTrue(comparator.compare(res(new NumericRangeList(asList(154), false)), res(155)) < 0);
		assertTrue(comparator.compare(res(new NumericRangeList(asList(1, 2, 3), false)), res(new NumericRangeList(asList(5, 6), false))) > 0);
		
		assertTrue(comparator.compare(res("abc"), res("def")) < 0);
		assertTrue(comparator.compare(res("123"), res(123)) == 0);
		assertTrue(comparator.compare(res("ZZZ"), res(99)) > 0);
		assertTrue(comparator.compare(res("125"), res("13")) < 0);
		assertTrue(comparator.compare(res(125), res(13)) > 0);
		
		assertTrue(comparator.compare(res(new IntegerWithUnit(125, "ms")), res(new IntegerWithUnit(13, "ms"))) > 0);
	}
	
	@Test
	public void differentIndexesSupported() throws Exception {
		comparator.byIndex(0, true);
		assertTrue(comparator.compare(res("a", "z"), res("z", "a")) < 0);
		
		comparator.byIndex(1, true);
		assertTrue(comparator.compare(res("a", "z"), res("z", "a")) > 0);
		
		comparator.byIndex(2, false);
		assertTrue(comparator.compare(res("a", "x", "mmm"), res("a", "y", "mmm")) == 0);
	}
	
	@Test
	public void descendingWorks() throws Exception {
		comparator.byIndex(0, false);
		
		assertTrue(comparator.compare(res("a"), res(NotAvailable.VALUE)) < 0);
		assertTrue(comparator.compare(res(NotScanned.VALUE), res(NotAvailable.VALUE)) > 0);
		assertTrue(comparator.compare(res(2), res(1)) < 0);
		assertTrue(comparator.compare(res("A"), res("Z")) > 0);
	}
	
	@Test
	public void stringsComparedCaseInsensitively() throws Exception {
		comparator.byIndex(0, true);
		
		assertTrue(comparator.compare(res("a"), res("A")) == 0);
		assertTrue(comparator.compare(res("Anton"), res("ANT")) > 0);
		assertTrue(comparator.compare(res("Z"), res("a")) > 0);
	}
	
	@Test
	public void fallbackToIP() throws Exception {
		Object ip1 = new InetAddressHolder(InetAddress.getByName("127.0.0.25"));
		Object ip2 = new InetAddressHolder(InetAddress.getByName("127.0.0.30"));
		Object ip3 = new InetAddressHolder(InetAddress.getByName("128.0.0.25"));

		comparator.byIndex(1, true);		
		assertTrue(comparator.compare(res(ip1, "a"), res(ip1, "A")) == 0);
		assertTrue(comparator.compare(res(ip1, "a"), res(ip2, "a")) < 0);
		assertTrue(comparator.compare(res(ip3, "a"), res(ip2, "a")) > 0);
		
		comparator.byIndex(1, false);		
		assertTrue(comparator.compare(res(ip1, null), res(ip2, null)) > 0);
		assertTrue(comparator.compare(res(ip3, null), res(ip2, null)) < 0);
	}

	@Test
	public void sortingWorksInBothDirections() throws Exception {
		var results = new ScanningResult[]{
				res(NotScanned.VALUE),
				res(NotAvailable.VALUE),
				res(15),
				res(NotScanned.VALUE),
				res(1),
				res(NotAvailable.VALUE),
				res("a")
		};
		
		comparator.byIndex(0, true);
		sort(results, comparator);
		
		assertEquals(1, results[0].getValues().get(0));
		assertEquals(15, results[1].getValues().get(0));
		assertEquals("a", results[2].getValues().get(0));
		assertEquals(NotAvailable.VALUE, results[3].getValues().get(0));
		assertEquals(NotAvailable.VALUE, results[4].getValues().get(0));
		assertEquals(NotScanned.VALUE, results[5].getValues().get(0));
		assertEquals(NotScanned.VALUE, results[6].getValues().get(0));

		comparator.byIndex(0, false);
		sort(results, comparator);
		
		assertEquals("a", results[0].getValues().get(0));
		assertEquals(15, results[1].getValues().get(0));
		assertEquals(1, results[2].getValues().get(0));
		assertEquals(NotAvailable.VALUE, results[3].getValues().get(0));
		assertEquals(NotScanned.VALUE, results[5].getValues().get(0));
	}
		
	private ScanningResult res(Object ... values) throws UnknownHostException {
		var result = new ScanningResult(InetAddress.getByName("127.0.0.1"), values.length);
		for (var i = 0; i < values.length; i++) {
			result.setValue(i, values[i]);
		}
		return result;
	}
}
