package org.apache.taverna.scufl2.validation.structural;
/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 *
*/


import static org.junit.Assert.assertEquals;

import java.util.HashMap;
import java.util.Map;

import org.apache.taverna.scufl2.api.core.Processor;
import org.apache.taverna.scufl2.api.iterationstrategy.CrossProduct;
import org.apache.taverna.scufl2.api.iterationstrategy.DotProduct;
import org.apache.taverna.scufl2.api.iterationstrategy.IterationStrategyStack;
import org.apache.taverna.scufl2.api.iterationstrategy.PortNode;
import org.apache.taverna.scufl2.api.port.InputProcessorPort;
import org.apache.taverna.scufl2.validation.structural.StructuralValidator;
import org.junit.Test;


public class StagedCombinationTest {
	
	private InputProcessorPort a;
	private InputProcessorPort b;
	
	private CrossProduct getCross(int depthA, int depthB) {
		a = new InputProcessorPort();
		a.setName("a");
		a.setDepth(0);
		CrossProduct cp = new CrossProduct();
		PortNode nipn1 = new PortNode(cp, a);
		nipn1.setDesiredDepth(depthA);
		
		b = new InputProcessorPort();
		b.setName("b");
		b.setDepth(0);
		PortNode nipn2 = new PortNode(cp, b);
		nipn2.setDesiredDepth(depthB);

		return cp;
	}
	
	private DotProduct getDot(int depthA, int depthB) {
		a = new InputProcessorPort();
		a.setName("a");
		a.setDepth(0);
		DotProduct dp = new DotProduct();
		PortNode nipn1 = new PortNode(dp, a);
		nipn1.setDesiredDepth(depthA);
		
		b = new InputProcessorPort();
		b.setName("b");
		b.setDepth(0);
		PortNode nipn2 = new PortNode(dp, b);
		nipn2.setDesiredDepth(depthB);

		return dp;
	}
	
	/**
	 * Test whether Paul's example of iterating with dot product then cross
	 * product can typecheck in a single staged iteration. This was an example
	 * where the user had two lists of folders (a1, a2, b1, b2, c1, c2) and
	 * wanted to compare all the contents of each 'a' folder with the other 'a'
	 * folder and so on, doing a dot match to only compare a1 and a2 then a
	 * cross product join within each pair to compare all contents of a1 with
	 * all contents of a2. This appears to work!
	 */
	@Test
	public void testStagedCombinationOfDotAndCross() {
		Processor p = new Processor();
		IterationStrategyStack iss = new IterationStrategyStack(p);
		iss.add(getDot(1, 1));	
		iss.add(getCross(0, 0));
		
		StructuralValidator sv = new StructuralValidator();
		sv.getValidatorState().setProcessor(p);
		Map<InputProcessorPort, Integer> tempDepths = new HashMap<InputProcessorPort, Integer>();
		tempDepths.put(a,2);
		tempDepths.put(b,2);

		assertEquals(Integer.valueOf(3), sv.calculateResultWrappingDepth(tempDepths));
	}

}