package jmri.jmrix.can.adapters.gridconnect.canrs;

import jmri.jmrix.can.CanReply;
import jmri.util.JUnitUtil;

import org.junit.Assert;
import org.junit.jupiter.api.*;

/**
 * Tests for the jmri.jmrix.can.adapters.gridconnect.canrs.MergReply class
 *
 * @author Bob Jacobsen Copyright 2008, 2009
 */
public class MergReplyTest extends jmri.jmrix.AbstractMessageTestBase {

    // :S1260N12345678;
    @Test
    public void testOne() {

        MergReply g = new MergReply(":S1260N12345678;");

        CanReply r = g.createReply();

        Assert.assertEquals("extended", false, r.isExtended());
        Assert.assertEquals("rtr", false, r.isRtr());
        Assert.assertEquals("header", unMungeStdHeader(0x1260), r.getHeader());
        Assert.assertEquals("num elements", 4, r.getNumDataElements());
        Assert.assertEquals("el 0", 0x12, r.getElement(0));
        Assert.assertEquals("el 1", 0x34, r.getElement(1));
        Assert.assertEquals("el 2", 0x56, r.getElement(2));
        Assert.assertEquals("el 3", 0x78, r.getElement(3));
    }

    // :XF00DN;
    @Test
    public void testTwo() {

        MergReply g = new MergReply(":XF00DN;");

        CanReply r = g.createReply();

        Assert.assertEquals("extended", true, r.isExtended());
        Assert.assertEquals("rtr", false, r.isRtr());
        Assert.assertEquals("header", 0xF00D, r.getHeader());
        Assert.assertEquals("num elements", 0, r.getNumDataElements());
    }

    @Test
    public void testThree() {

        MergReply g = new MergReply(":X123R12345678;");

        CanReply r = g.createReply();

        Assert.assertEquals("extended", true, r.isExtended());
        Assert.assertEquals("rtr", true, r.isRtr());
        Assert.assertEquals("header", 0x123, r.getHeader());
        Assert.assertEquals("num elements", 4, r.getNumDataElements());
        Assert.assertEquals("el 0", 0x12, r.getElement(0));
        Assert.assertEquals("el 1", 0x34, r.getElement(1));
        Assert.assertEquals("el 2", 0x56, r.getElement(2));
        Assert.assertEquals("el 3", 0x78, r.getElement(3));
    }

    @Test
    public void testThreeAlt() {

        MergReply g = new MergReply(":X0000123R12345678;");

        CanReply r = g.createReply();

        Assert.assertEquals("extended", true, r.isExtended());
        Assert.assertEquals("rtr", true, r.isRtr());
        Assert.assertEquals("header", 0x123, r.getHeader());
        Assert.assertEquals("num elements", 4, r.getNumDataElements());
        Assert.assertEquals("el 0", 0x12, r.getElement(0));
        Assert.assertEquals("el 1", 0x34, r.getElement(1));
        Assert.assertEquals("el 2", 0x56, r.getElement(2));
        Assert.assertEquals("el 3", 0x78, r.getElement(3));
    }

    @Test
    public void testThreeBis() {

        MergReply g = new MergReply(":X000123R12345678;");

        CanReply r = g.createReply();

        Assert.assertEquals("extended", true, r.isExtended());
        Assert.assertEquals("rtr", true, r.isRtr());
        Assert.assertEquals("header", 0x123, r.getHeader());
        Assert.assertEquals("num elements", 4, r.getNumDataElements());
        Assert.assertEquals("el 0", 0x12, r.getElement(0));
        Assert.assertEquals("el 1", 0x34, r.getElement(1));
        Assert.assertEquals("el 2", 0x56, r.getElement(2));
        Assert.assertEquals("el 3", 0x78, r.getElement(3));
    }

    @Test
    public void testFour() {

        MergReply g = new MergReply(":XFFE3FFFFR63;");

        CanReply r = g.createReply();

        Assert.assertEquals("extended", true, r.isExtended());
        Assert.assertEquals("rtr", true, r.isRtr());
        Assert.assertEquals("header", unMungeExtHeader(0xFFE3FFFF), r.getHeader());
        Assert.assertEquals("num elements", 1, r.getNumDataElements());
        Assert.assertEquals("el 1", 0x63, r.getElement(0));
    }

    @Test
    public void testZeroLengthRtr() {
        MergReply g = new MergReply(":SB0F0R;");
        CanReply r = g.createReply();
        
        Assert.assertEquals("rtr", true, r.isRtr());
        Assert.assertEquals("extended", false, r.isExtended());
        Assert.assertEquals("header", 1415, r.getHeader());
        Assert.assertEquals("num elements", 0, r.getNumDataElements());
    }

    @Test
    public void testZeroLengthStandard() {
        MergReply g = new MergReply(":SB180N;");
        CanReply r = g.createReply();
        
        Assert.assertEquals("rtr", false, r.isRtr());
        Assert.assertEquals("extended", false, r.isExtended());
        Assert.assertEquals("header", 1420, r.getHeader());
        Assert.assertEquals("num elements", 0, r.getNumDataElements());
    }
    
    // Left shift a standard header from CBUS specific format
    public int unMungeStdHeader(int h) {
        return (h >> 5);
    }

    // Un-munge extended header from CBUS specific format
    public int unMungeExtHeader(int h) {
        return (((h >> 3) & 0x1FFC0000) | (h & 0x3FFFF));
    }

    @Override
    @BeforeEach
    public void setUp() {
        JUnitUtil.setUp();
        m = new MergReply(":S1260N12345678;");
    }

    @AfterEach
    @Override
    public void tearDown() {
        m = null;
        JUnitUtil.tearDown();
    }
}