/*
 * $Id: GBSigBasedTest.java 5591 2016-08-17 21:41:22Z kredel $
 */

package edu.jas.gb;


import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;

import edu.jas.arith.BigRational;
// import edu.jas.kern.ComputerThreads;
import edu.jas.poly.GenPolynomial;
import edu.jas.poly.GenPolynomialRing;
import edu.jas.poly.GenPolynomialTokenizer;
import edu.jas.poly.PolynomialList;


/**
 * Groebner base sig based via jython tests with JUnit.
 * @author Heinz Kredel.
 */

public class GBSigBasedTest extends TestCase {


    private static final Logger logger = Logger.getLogger(GBSigBasedTest.class);


    /**
     * main
     @param args not used
     */
    public static void main(String[] args) {
        BasicConfigurator.configure();
        junit.textui.TestRunner.run(suite());
    }


    /**
     * Constructs a <CODE>GBSigBasedTest</CODE> object.
     * @param name String.
     */
    public GBSigBasedTest(String name) {
        super(name);
    }


    /**
     * suite.
     * @return test suite.
     */
    public static Test suite() {
        TestSuite suite = new TestSuite(GBSigBasedTest.class);
        return suite;
    }


    GenPolynomialRing<BigRational> fac;


    List<GenPolynomial<BigRational>> L;


    PolynomialList<BigRational> F;


    List<GenPolynomial<BigRational>> G, Gn;


    GroebnerBaseAbstract<BigRational> bb;


    GroebnerBaseAbstract<BigRational> bbn;


    GenPolynomial<BigRational> a, b, c, d, e;


    int rl = 3; //4; //3; 


    int kl = 5; //10;


    int ll = 5; //7;


    int el = 3;


    float q = 0.2f; //0.4f


    @Override
    protected void setUp() {
        BigRational coeff = new BigRational(9);
        fac = new GenPolynomialRing<BigRational>(coeff, rl);
        a = b = c = d = e = null;
        //bb = new GBSigBased<BigRational>();
        bb = new GBSigBased<BigRational>(GBSigBased.GBAlgo.ggv1); //sbgb);
        //bbn = new GroebnerBaseSeq<BigRational>(new ReductionSeq<BigRational>(),new OrderedSyzPairlist<BigRational>());
        bbn = new GroebnerBaseSeq<BigRational>();
        //logger.info("using " + bb);
    }


    @Override
    protected void tearDown() {
        int s = bb.cancel();
        logger.debug("canceled tasks: " + s);
        //assertTrue("s >= 0 " + s, s >= 0);
        a = b = c = d = e = null;
        fac = null;
        bb = null;
        bbn = null;
    }


    /**
     * Test GBase.
     */
    public void testGBase() {
        L = new ArrayList<GenPolynomial<BigRational>>();

        a = fac.random(kl, ll, el, q);
        b = fac.random(kl, ll, el, q);
        c = fac.random(kl, ll, el, q);
        d = fac.random(kl, ll, el, q);
        e = d; //fac.random(kl, ll, el, q );

        if (a.isZERO() || b.isZERO() || c.isZERO() || d.isZERO()) {
            return;
        }

        L.add(a);
        L = bb.GB(L);
        assertTrue("isGB( { a } )", bb.isGB(L));

        L.add(b);
        //System.out.println("L = " + L.size() );
        L = bb.GB(L);
        assertTrue("isGB( { a, b } )", bb.isGB(L));

        L.add(c);
        L = bb.GB(L);
        assertTrue("isGB( { a, b, c } )", bb.isGB(L));

        L.add(d);
        L = bb.GB(L);
        assertTrue("isGB( { a, b, c, d } )", bb.isGB(L));

        L.add(e);
        L = bb.GB(L);
        assertTrue("isGB( { a, b, c, d, e } )", bb.isGB(L));
    }


    /**
     * Test Trinks7 GBase.
     */
    @SuppressWarnings({ "unchecked", "cast" })
    public void testTrinks7GBase() {
        //String exam = "Mod 32003 (B,S,T,Z,P,W) L " 
        String exam = "Rat (B,S,T,Z,P,W) L " + "( " + "( 45 P + 35 S - 165 B - 36 ), "
                        + "( 35 P + 40 Z + 25 T - 27 S ), " + "( 15 W + 25 S P + 30 Z - 18 T - 165 B**2 ), "
                        + "( - 9 W + 15 T P + 20 S Z ), " + "( P W + 2 T Z - 11 B**3 ), "
                        + "( 99 W - 11 B S + 3 B**2 ) " + "( 10000 B**2 + 6600 B + 2673 ) " + ") ";
        Reader source = new StringReader(exam);
        GenPolynomialTokenizer parser = new GenPolynomialTokenizer(source);
        try {
            F = (PolynomialList<BigRational>) parser.nextPolynomialSet();
        } catch (ClassCastException e) {
            fail("" + e);
        } catch (IOException e) {
            fail("" + e);
        }
        //System.out.println("F = " + F);

        long t;
        t = System.currentTimeMillis();
        Gn = bbn.GB(F.list);
        t = System.currentTimeMillis() - t;
        System.out.println("bbn took = " + t);
        G = bb.GB(F.list);
        G = bb.GB(F.list);
        assertEquals("#GB(Trinks7) == 6", 6, G.size());
        assertTrue("isGB( GB(Trinks7) ) " + G, bb.isGB(G));
        assertEquals("#G == #Gn", G.size(), Gn.size());
        assertTrue("t >= 0 ", t >= 0);
        //PolynomialList<BigRational> trinks = new PolynomialList<BigRational>(F.ring, G);
        //System.out.println("G = " + trinks);
        //         t = System.currentTimeMillis();
        //         Gn = bbn.GB(F.list);
        //         t = System.currentTimeMillis() - t;
        //         System.out.println("bbn took = " + t);
        //         G = bb.GB(F.list);
        //         assertEquals("#G == #Gn", G.size(), Gn.size());
        //         t = System.currentTimeMillis();
        //         Gn = bbn.GB(F.list);
        //         t = System.currentTimeMillis() - t;
        //         System.out.println("bbn took = " + t);
        //         G = bb.GB(F.list);
        //         assertEquals("#G == #Gn", G.size(), Gn.size());
        //         assertEquals("#GB(Trinks7) == 6", 6, G.size());
    }

}