package Hypotheek;
import org.junit.* ;
import static org.junit.Assert.* ;
import static Hypotheek.Util.* ;

public class InkomenBelasting2009_test {

    static float ACCURACY = 0.001f ;

    static InkomenBelasting2009 Bref = new InkomenBelasting2009() ;

    static int TAX_SCHIJF1 = toInt(calcPercentage(Bref.schijf1_taxrate, Bref.schijf1_max)) ;
    static int BIJD_ZGV_SCHIJF1 = toInt(calcPercentage(Bref.bijdrage_zorgverz_rate, Bref.schijf1_max)) ;
    static int TAX_SCHIJF2 = TAX_SCHIJF1
                            +
                            toInt(calcPercentage(Bref.schijf2_taxrate, Bref.schijf2_max - Bref.schijf1_max)) ;
    static int BIJD_ZGV_SCHIJF2 = toInt(calcPercentage(Bref.bijdrage_zorgverz_rate, Bref.schijf2_max)) ;
    static int TAX_SCHIJF3 = TAX_SCHIJF2
                            +
                            toInt(calcPercentage(Bref.schijf3_taxrate, Bref.schijf3_max - Bref.schijf2_max)) ;


    @Test
    public void test_tax_a10_S1() {
        System.out.println(">>> TESTING inkomensbelasting schijf-1, 10-year age ...") ;
        InkomenBelasting2009 B = new InkomenBelasting2009() ;
        int inkomen = 100 ; // 100 cent
        int age = 10 ;
        int bijdrage_zorgvz = toInt(calcPercentage(Bref.bijdrage_zorgverz_rate,inkomen)) ;
        //System.out.println(">>> bijdrage_zorgvz: " + bijdrage_zorgvz) ;
        int expected_tax = toInt(calcPercentage(Bref.schijf1_taxrate,inkomen + bijdrage_zorgvz))
                            -
                            B.calcArbeidskorting(inkomen, age)
                            ;
        int tax = B.calcInkomenBelasting(inkomen,age);
        System.out.println(">>> calculated tax: " + tax + ", expected: " + expected_tax) ;
        assertTrue(approxEq(tax,expected_tax,ACCURACY)) ;
    }

    @Test
    public void test_tax_a10_S2() {
        System.out.println(">>> TESTING inkomensbelasting schijf-2, 10-year age ...") ;
        InkomenBelasting2009 B = new InkomenBelasting2009() ;
        int D = 1000 ;
        int age = 10 ;
        int inkomen = Bref.schijf1_max + D ; // in cent
        
        int bijdrage_zorgvz = toInt(calcPercentage(Bref.bijdrage_zorgverz_rate,inkomen)) ;
        int expected_tax = TAX_SCHIJF1 + toInt(calcPercentage(Bref.schijf2_taxrate, D + bijdrage_zorgvz))
                            -
                            B.calcArbeidskorting(inkomen, age) ;
        int tax = B.calcInkomenBelasting(inkomen,age);
        System.out.println(">>> calculated tax: " + tax + ", expected: " + expected_tax) ;
        assertTrue(approxEq(tax,expected_tax,ACCURACY)) ;
    }

    @Test
    public void test_tax_a10_S3() {
        System.out.println(">>> TESTING inkomensbelasting schijf-3, 10-year age ...") ;
        InkomenBelasting2009 B = new InkomenBelasting2009() ;
        int D = 2000 ;
        int age = 10 ;
        int inkomen = Bref.schijf2_max + D ; // in cent

        int bijdrage_zorgvz = toInt(calcPercentage(Bref.bijdrage_zorgverz_rate,inkomen)) ;
        int expected_tax = TAX_SCHIJF2 + toInt(calcPercentage(Bref.schijf3_taxrate, D + bijdrage_zorgvz))
                            -
                            B.calcArbeidskorting(inkomen, age) ;
        int tax = B.calcInkomenBelasting(inkomen,age);
        System.out.println(">>> calculated tax: " + tax + ", expected: " + expected_tax) ;
        assertTrue(approxEq(tax,expected_tax,ACCURACY)) ;
    }

    @Test
    public void test_tax_a10_S4() {
        System.out.println(">>> TESTING inkomensbelasting schijf-4, 10-year age ...") ;
        InkomenBelasting2009 B = new InkomenBelasting2009() ;
        int D = 2000 ;
        int age = 10 ;
        int inkomen = Bref.schijf3_max + D ; // in cent
        // System.out.println(">>> S3 tax = " +  TAX_SCHIJF3) ;
        int bijdrage_zorgvz = B.calcBijdrageZorgverzekering(inkomen, age) ;
        int expected_tax = TAX_SCHIJF3 + toInt(calcPercentage(Bref.schijf4_taxrate, D + bijdrage_zorgvz))
                            -
                            B.calcArbeidskorting(inkomen, age) ;
        int tax = B.calcInkomenBelasting(inkomen,age);
        System.out.println(">>> calculated tax: " + tax + ", expected: " + expected_tax) ;
        assertTrue(approxEq(tax,expected_tax,ACCURACY)) ;
    }


       @Test
        public void test_tax_allAges_S4() {
        System.out.println(">>> TESTING inkomensbelasting schijf-4, various ages ...") ;
        InkomenBelasting2009 B = new InkomenBelasting2009() ;
        int D = 2000 ;
        int inkomen = Bref.schijf3_max + D ; // in cent
        for (int age=0; age<=70; age++) {
            int bijdrage_zorgvz = B.calcBijdrageZorgverzekering(inkomen, age) ;
            int expected_tax = TAX_SCHIJF3 + toInt(calcPercentage(Bref.schijf4_taxrate, D + bijdrage_zorgvz))
                            -
                            B.calcArbeidskorting(inkomen, age) ;
            int tax = B.calcInkomenBelasting(inkomen,age);
            System.out.println(">>> age " + age + ", calculated tax: " + tax + ", expected: " + expected_tax) ;
            assertTrue(approxEq(tax,expected_tax,ACCURACY)) ;
        }
    }



}