package unify;

import junit.framework.Assert;

import org.junit.Test;

import de.dhbwstuttgart.syntaxtree.type.RefType;
import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
import de.dhbwstuttgart.typeinference.Menge;
import de.dhbwstuttgart.typeinference.Pair;
import de.dhbwstuttgart.typeinference.Pair.PairOperator;
import de.dhbwstuttgart.typeinference.unify.Unify;

public class UnifyTest {
	
	@Test
	public void unifyTestSimpleTypes() {

	}
	
	@Test
	public void unifyTestInheritance() {
		
		// Init Factories and Builders
		UnifyTypeFactory typeFactory = new UnifyTypeFactory();
		Unify_FC_TTO_Builder fcBuilder = new Unify_FC_TTO_Builder();
		UnifyPairMengenBuilder assumptionBuilder = new UnifyPairMengenBuilder();
		UnifyPairMengenBuilder resultBuilder = new UnifyPairMengenBuilder();
		
		// Init Types
		RefType tBool = typeFactory.GetSimpleType("java.lang.Boolean");
		RefType tString = typeFactory.GetSimpleType("java.lang.String");
		RefType tInt = typeFactory.GetSimpleType("java.lang.Integer");
		TypePlaceholder tphA = typeFactory.GetTypePlaceholder("a");
		
		// Build inheritance hierachy
		// Bool <. String <. Int
		fcBuilder.AddInheritance(tBool, tString);
		fcBuilder.AddInheritance(tString, tInt);
		
		// Build Assumptions
		assumptionBuilder.addPair(tphA, tString);

		// Build expected result
		resultBuilder.addPair(tphA, tBool, PairOperator.Equal);
		resultBuilder.addPair(tphA, typeFactory.GetExtendsType(tBool), PairOperator.Equal);
		resultBuilder.addPair(tphA, tString, PairOperator.Equal);
		resultBuilder.addPair(tphA, typeFactory.GetExtendsType(tString), PairOperator.Equal);
		
		// Assert
		Menge<Menge<Pair>> actualResult = Unify.unify(assumptionBuilder.getPairMenge(), fcBuilder.Get_FC_TTO());
		
		System.out.println(actualResult);
		System.out.println("-------------------");
		System.out.println(resultBuilder.getNestedPairMenge());
		
		Assert.assertTrue(mengeEquals(resultBuilder.getNestedPairMenge(), actualResult));
	}
	
	@Test
	public void unifyTestWildcards() {
		
	}
	
	protected boolean mengeEquals(Menge<Menge<Pair>> m1, Menge<Menge<Pair>> m2) {
		return m1.containsAll(m2) && m2.containsAll(m1);
	}
}