package unify;

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

import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
import de.dhbwstuttgart.typeinference.unify.model.MPair;
import de.dhbwstuttgart.typeinference.unify.model.MPair.PairOperator;
import de.dhbwstuttgart.typeinference.unify.model.FiniteClosure;
import de.dhbwstuttgart.typeinference.unify.model.UnifyType;

public class FiniteClosureTest extends FiniteClosure {
	
	@Test
	public void testMatch() {
		TypeFactory tf = new TypeFactory();
		
		UnifyType a = tf.getPlaceholderType("a");
		UnifyType b = tf.getPlaceholderType("b");
		UnifyType c = tf.getPlaceholderType("c");
		
		UnifyType A = tf.getSimpleType("A");
		UnifyType B = tf.getSimpleType("B");
		UnifyType C1 = tf.getSimpleType("C", a, b, c);
		UnifyType C2 = tf.getSimpleType("C", a, A, b);
		UnifyType C3 = tf.getSimpleType("C", A, B, A);
		UnifyType D1 = tf.getSimpleType("D", C1, a, b, c);
		UnifyType D2 = tf.getSimpleType("D", C3, A, B, A);
		
		System.out.println(match(C2, C1));
		System.out.println(match(C3, C1));
		System.out.println(match(D2, D1));
		Assert.assertFalse(match(C3, C2).isPresent());
		Assert.assertFalse(match(C1, C2).isPresent());
	}
	
	@Test
	public void testGreater() {
		IFiniteClosure fc = new FiniteClosureBuilder().getCollectionExample();
		TypeFactory tf = new TypeFactory();

		System.out.println("\n\n----- Greater Test -----");
		System.out.println("Greater(LinkedList<T>) = " + fc.greater(tf.getSimpleType("LinkedList", "T")));
		System.out.println("Greater(TreeSet<T>) = " + fc.greater(tf.getSimpleType("TreeSet", "T")));
		System.out.println("Greater(Collection) = " + fc.greater(tf.getSimpleType("Collection")));
	}
	
	@Test
	public void testGrArg() {
		IFiniteClosure fc = new FiniteClosureBuilder().getCollectionExample();
		TypeFactory tf = new TypeFactory();
		
		System.out.println("\n\n----- GrArg Test -----");
		System.out.println("GrArg(List<T>) = " + fc.grArg(tf.getSimpleType("List", "T")));
		System.out.println("GrArg(? extends List<T>) = " + fc.grArg(tf.getExtendsType(tf.getSimpleType("List", "T"))));
		System.out.println("GrArg(? super List<T>) = " + fc.grArg(tf.getSuperType(tf.getSimpleType("List", "T"))));
	}
	
	@Test
	public void testSmaller() {
		FiniteClosureBuilder fcb = new FiniteClosureBuilder();
		TypeFactory tf = new TypeFactory();
		
		fcb.add(tf.getSimpleType("Integer"), tf.getSimpleType("Number"));
		IFiniteClosure fc = fcb.getCollectionExample();
		
		System.out.println("\n\n----- Smaller Test -----");
		System.out.println("Smaller(List<? extends Number>) = " + fc.smaller(tf.getSimpleType("List", tf.getExtendsType(tf.getSimpleType("Number")))));
		System.out.println("Smaller(List<T>) = " + fc.smaller(tf.getSimpleType("List", "T")));
		System.out.println("Smaller(TreeSet<T>) = " + fc.smaller(tf.getSimpleType("TreeSet", "T")));
		System.out.println("Smaller(Collection) = " + fc.smaller(tf.getSimpleType("Collection")));
	}
	
	@Test
	public void testSmArg() {
		IFiniteClosure fc = new FiniteClosureBuilder().getCollectionExample();
		TypeFactory tf = new TypeFactory();
		
		System.out.println("\n\n----- SmArg Test -----");
		System.out.println("SmArg(List<T>) = " + fc.smArg(tf.getSimpleType("List", "T")));
		System.out.println("SmArg(? extends List<T>) = " + fc.smArg(tf.getExtendsType(tf.getSimpleType("List", "T"))));
		System.out.println("SmArg(? super List<T>) = " + fc.smArg(tf.getSuperType(tf.getSimpleType("List", "T"))));
	}
	
	@Test
	public void testGetGenericType() {
		
		// TODO
	}
}