// This software is released into the Public Domain.  See copying.txt for details.
package org.openstreetmap.osmosis.pgsnapshot.v0_6.impl;

import org.junit.Assert;
import org.junit.Test;

import org.openstreetmap.osmosis.pgsnapshot.common.InMemoryNodeLocationStore;
import org.openstreetmap.osmosis.pgsnapshot.common.NodeLocation;
import org.openstreetmap.osmosis.pgsnapshot.common.NodeLocationStore;
import org.openstreetmap.osmosis.pgsnapshot.common.PersistentNodeLocationStore;
import org.openstreetmap.osmosis.core.util.FixedPrecisionCoordinateConvertor;


/**
 * Tests the node location store implementations.
 * 
 * @author Brett Hendersons
 */
public class NodeLocationStoreTest {
	
	private void testStoreImplementation(NodeLocationStore store) {
		// Add a large number of locations to the store.
		for (int i = 0; i < 100000; i++) {
			double longitude;
			double latitude;
			
			// Stores typically use fixed precision storage therefore ensure we
			// have a good spread of values.
			// The longitude and latitude must be different values to ensure they don't get mixed up.
			longitude = FixedPrecisionCoordinateConvertor.convertToDouble(1 << (i % 32));
			latitude = FixedPrecisionCoordinateConvertor.convertToDouble(1 << ((i + 1) % 32));
			
			// Add the location to the store but leave every node invalid.
			store.addLocation(i * 2, new NodeLocation(longitude, latitude));
		}
		

		// Verify that the data from the store matches.
		for (int i = 0; i < 100000; i++) {
			double longitude;
			double latitude;
			NodeLocation location;
			
			// Stores typically use fixed precision storage therefore ensure we
			// have a good spread of values.
			// The longitude and latitude must be different values to ensure they don't get mixed up.
			longitude = FixedPrecisionCoordinateConvertor.convertToDouble(1 << (i % 32));
			latitude = FixedPrecisionCoordinateConvertor.convertToDouble(1 << ((i + 1) % 32));
			
			location = store.getNodeLocation(i * 2);
			Assert.assertTrue("The node location should be valid.", location.isValid());
			Assert.assertEquals("The longitude is incorrect.", longitude, location.getLongitude(), 0);
			Assert.assertEquals("The latitude is incorrect.", latitude, location.getLatitude(), 0);
			
			location = store.getNodeLocation((i * 2) + 1);
			Assert.assertFalse("The node location should be invalid.", location.isValid());
		}
		
		store.close();
	}
	
	
	/**
	 * Tests the temporary file implementation.
	 */
	@Test
	public void testTempFile() {
		testStoreImplementation(new PersistentNodeLocationStore());
	}
	
	
	/**
	 * Tests the in-memory implementation.
	 */
	@Test
	public void testInMemory() {
		testStoreImplementation(new InMemoryNodeLocationStore());
	}
}