/*
 * ParserTest.java
 *
 * Created on March 15, 2002, 9:57 AM
 */

package ca.uhn.hl7v2.parser;

import java.util.Iterator;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import ca.uhn.hl7v2.model.*;
import ca.uhn.hl7v2.util.Terser;
import ca.uhn.hl7v2.HL7Exception;
import junit.framework.TestCase;

/**
 * JUnit test harness for Parser
 * 
 * @author Bryan Tripp
 */
public class ParserTest extends TestCase
{
    private static final Log ourLog = LogFactory.getLog(ParserTest.class);


    /** Creates a new instance of ParserTest */
    public ParserTest(String arg) {
        super(arg);
    }


    public void testMakeControlMSH() throws HL7Exception {
        ModelClassFactory factory = new DefaultModelClassFactory();
        Segment msh = Parser.makeControlMSH("2.4", factory);
        assertTrue(msh instanceof ca.uhn.hl7v2.model.v24.segment.MSH);
        msh = Parser.makeControlMSH("2.2", factory);
        assertTrue(msh instanceof ca.uhn.hl7v2.model.v22.segment.MSH);
        try {
            msh = Parser.makeControlMSH("1", factory);
            fail("should have thrown exception with version = 1");
        } catch (Exception e) {
        }
    }


    public void testEventMap() throws Exception {
        String message = "MSH|^~\\&|||||||ADT^A04|1|D|2.4\r";
        PipeParser p = new PipeParser();
        Message m = p.parse(message);
        assertEquals("ADT_A01", m.getName());

        // shouldn't be a map entry, so should return an ACK
        message = "MSH|^~\\&|||||||ACK|1|D|2.4\r";
        p = new PipeParser();
        m = p.parse(message);
        assertEquals("ACK", m.getName());

        // no maps for v2.1 so should map to self
        message = "MSH|^~\\&|||||||ADT^A01|1|D|2.1\r";
        p = new PipeParser();
        m = p.parse(message);
        assertEquals("ADT_A01", m.getName());
    }


    public void testGenericMessage() throws Exception {
        // a valid ORU_R01 message in which MSH-9 has been changed
        String message = "MSH|^~\\&|LABGL1||DMCRES||19951002185200||ZZZ^ZZZ|LABGL1199510021852632|P|2.2\r"
                + "PID|||T12345||TEST^PATIENT^P||19601002|M||||||||||123456\r"
                + "PV1|||NER|||||||GSU||||||||E||||||||||||||||||||||||||19951002174900|19951006\r"
                + "OBR|1||09527539437000040|7000040^ETHANOL^^^ETOH|||19951002180500|||||||19951002182500||||1793561||0952753943||19951002185200||100|F||^^^^^RT\r"
                + "OBX||NM|7000040^ETHANOL^^^ETOH|0001|224|mg/dL|||||F|||19951002185200||182\r"
                + "NTE|||          Reference Ranges\r" + "NTE|||          ****************\r"
                + "NTE|||           Normal:              Negative\r"
                + "NTE|||           Toxic Concentration: >80 mg/dL\r";

        PipeParser p = new PipeParser();
        Message m = p.parse(message);
        p.encode(m);
        p.encode(m);
        p.encode(m);
        p.encode(m);
        p.encode(m);
        p.encode(m);

        assertEquals(GenericMessage.V22.class, m.getClass());
        Terser t = new Terser(m);
        assertEquals("DMCRES", t.get("/MSH-5"));
        assertEquals("NM", t.get("/OBX-2"));
    }

    
    /**
     * Disabled- This might be nice to handle gracefully, but we don't, we never did,
     * and the spec doesn't say we need to.
     */
    public void __tstUnknownVersionMessage() throws Exception {
        // a valid ORU_R01 message in which MSH-9 has been changed
        String message = "MSH|^~\\&|LABGL1||DMCRES||19951002185200||ORU^R01|LABGL1199510021852632|P|2.999\r"
                + "PID|||T12345||TEST^PATIENT^P||19601002|M||||||||||123456\r"
                + "PV1|||NER|||||||GSU||||||||E||||||||||||||||||||||||||19951002174900|19951006\r"
                + "OBR|1||09527539437000040|7000040^ETHANOL^^^ETOH|||19951002180500|||||||19951002182500||||1793561||0952753943||19951002185200||100|F||^^^^^RT\r"
                + "OBX||NM|7000040^ETHANOL^^^ETOH|0001|224|mg/dL|||||F|||19951002185200||182\r"
                + "NTE|||          Reference Ranges\r" + "NTE|||          ****************\r"
                + "NTE|||           Normal:              Negative\r"
                + "NTE|||           Toxic Concentration: >80 mg/dL\r";

        PipeParser p = new PipeParser();
        Message m = p.parse(message);
        p.encode(m);

        assertEquals(GenericMessage.V22.class, m.getClass());
        Terser t = new Terser(m);
        assertEquals("DMCRES", t.get("/MSH-5"));
        assertEquals("NM", t.get("/OBX-2"));
    }


    public void testGenericMessageAllVersions() throws Exception {
        List versions = Parser.getValidVersions();
        for (Iterator iterator = versions.iterator(); iterator.hasNext();) {
            String next = (String)iterator.next();
            if (next.startsWith("2.0")) {
                continue; // generic messages in 2.0 aren't handled
            }
            if (next.startsWith("2.1")) {
                continue; // generic messages in 2.0 aren't handled
            }

            // a valid ORU_R01 message in which MSH-9 has been changed
            String message = "MSH|^~\\&|LABGL1||DMCRES||19951002185200||ZZZ^ZZZ|LABGL1199510021852632|P|"
                    + next
                    + "\r"
                    + "PID|||T12345||TEST^PATIENT^P||19601002|M||||||||||123456\r"
                    + "PV1|||NER|||||||GSU||||||||E||||||||||||||||||||||||||19951002174900|19951006\r"
                    + "OBR|1||09527539437000040|7000040^ETHANOL^^^ETOH|||19951002180500|||||||19951002182500||||1793561||0952753943||19951002185200||100|F||^^^^^RT\r"
                    + "OBX||NM|7000040^ETHANOL^^^ETOH|0001|224|mg/dL|||||F|||19951002185200||182\r"
                    + "NTE|||          Reference Ranges\r" + "NTE|||          ****************\r"
                    + "NTE|||           Normal:              Negative\r"
                    + "NTE|||           Toxic Concentration: >80 mg/dL\r";

            ourLog.info("Parsing generic for version " + next);
            PipeParser p = new PipeParser();
            Message m;
            try {
                m = p.parse(message);
            } catch (HL7Exception e) {
                ourLog.error("Failed to parse: ", e);
                fail("Failed to parse message for version " + next + ". Possibly GenericMessage needs to be modified: " + e.getMessage());
                return;
            }
            Terser t = new Terser(m);
            assertEquals("DMCRES", t.get("/MSH-5"));
            assertEquals("NM", t.get("/OBX-2"));

        }
    }

}