/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.camel.component.hl7.springboot.test;

import org.apache.camel.EndpointInject;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.hl7.HL7DataFormat;
import org.apache.camel.component.hl7.HL7MLLPCodec;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.spi.DataFormat;
import org.apache.camel.spring.boot.CamelAutoConfiguration;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

import ca.uhn.hl7v2.model.Message;
import ca.uhn.hl7v2.model.v24.message.ADR_A19;
import ca.uhn.hl7v2.model.v24.message.ADT_A01;
import ca.uhn.hl7v2.model.v24.message.QRY_A19;
import ca.uhn.hl7v2.model.v24.segment.MSA;
import ca.uhn.hl7v2.model.v24.segment.PID;
import ca.uhn.hl7v2.model.v24.segment.QRD;
import ca.uhn.hl7v2.model.v24.segment.MSH;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.test.annotation.DirtiesContext;
import org.apache.camel.test.spring.junit5.CamelSpringBootTest;


@DirtiesContext
@CamelSpringBootTest
@SpringBootTest(
    classes = {
        CamelAutoConfiguration.class,
        HL7RouteTest.class,
        HL7RouteTest.TestConfiguration.class
    }
)
public class HL7RouteTest extends HL7TestSupport {

    
    @Autowired
    ProducerTemplate template;

    @EndpointInject("mock:a01")
    MockEndpoint mock01;
    
    @EndpointInject("mock:a19")
    MockEndpoint mock19;
    
    @EndpointInject("mock:unknown")
    MockEndpoint mockUnknow;

    
    @Bean(name = "hl7service")
    private MyHL7BusinessLogic getMyHL7BusinessLogic() {
        return new MyHL7BusinessLogic();
    }

    @Bean(name = "hl7codec")
    private HL7MLLPCodec addCodec() throws Exception {

        HL7MLLPCodec codec = new HL7MLLPCodec();
        codec.setCharset("iso-8859-1");

        return codec;
    }

    @Test
    public void testSendA19() throws Exception {
        mock19.reset();
        mock19.expectedMessageCount(1);
        mock19.message(0).body().isInstanceOf(Message.class);

        String line1 = "MSH|^~\\&|MYSENDER|MYSENDERAPP|MYCLIENT|MYCLIENTAPP|200612211200||QRY^A19|1234|P|2.4";
        String line2 = "QRD|200612211200|R|I|GetPatient|||1^RD|0101701234|DEM||";

        StringBuilder in = new StringBuilder();
        in.append(line1);
        in.append("\r");
        in.append(line2);

        String out = template.requestBody("mina:tcp://127.0.0.1:" + getPort() + "?sync=true&codec=#hl7codec", in.toString(),
                String.class);

        String[] lines = out.split("\r");
        assertEquals("MSH|^~\\&|MYSENDER||||200701011539||ADR^A19||||123", lines[0]);
        assertEquals("MSA|AA|123", lines[1]);

        mock19.assertIsSatisfied();
    }

    @Test
    public void testSendA01() throws Exception {
        
        mock01.expectedMessageCount(1);
        mock01.message(0).body().isInstanceOf(Message.class);

        String line1 = "MSH|^~\\&|MYSENDER|MYSENDERAPP|MYCLIENT|MYCLIENTAPP|200612211200||ADT^A01|123|P|2.4";
        String line2 = "PID|||123456||Doe^John";

        StringBuilder in = new StringBuilder();
        in.append(line1);
        in.append("\r");
        in.append(line2);

        String out = template.requestBody("mina:tcp://127.0.0.1:" + getPort() + "?sync=true&codec=#hl7codec", in.toString(),
                String.class);
        String[] lines = out.split("\r");
        assertEquals("MSH|^~\\&|MYSENDER||||200701011539||ADT^A01||||123", lines[0]);
        assertEquals("PID|||123||Doe^John", lines[1]);

        mock01.assertIsSatisfied();
    }

    @Test
    public void testSendUnknown() throws Exception {
        
        mockUnknow.expectedMessageCount(1);
        mockUnknow.message(0).body().isInstanceOf(Message.class);

        String line1 = "MSH|^~\\&|MYSENDER|MYSENDERAPP|MYCLIENT|MYCLIENTAPP|200612211200||ADT^A02|1234|P|2.4";
        String line2 = "PID|||123456||Doe^John";

        StringBuilder in = new StringBuilder();
        in.append(line1);
        in.append("\r");
        in.append(line2);

        template.requestBody("mina:tcp://127.0.0.1:" + getPort() + "?sync=true&codec=#hl7codec", in.toString());

        mockUnknow.assertIsSatisfied();
    }


    // *************************************
    // Config
    // *************************************

    @Configuration
    public static class TestConfiguration {

        @Bean
        public RouteBuilder routeBuilder() {
            return new RouteBuilder() {
                @Override
                public void configure() throws Exception {
                    // START SNIPPET: e1
                    DataFormat hl7 = new HL7DataFormat();
                    // we setup or HL7 listener on port 8888 (using the hl7codec)
                    // and in sync mode so we can return a response
                    from("mina:tcp://127.0.0.1:" + getPort() + "?sync=true&codec=#hl7codec")
                            // we use the HL7 data format to unmarshal from HL7 stream
                            // to the HAPI Message model
                            // this ensures that the camel message has been enriched
                            // with hl7 specific headers to
                            // make the routing much easier (see below)
                            .unmarshal(hl7)
                            // using choice as the content base router
                            .choice()
                            // where we choose that A19 queries invoke the handleA19
                            // method on our hl7service bean
                            .when(header("CamelHL7TriggerEvent").isEqualTo("A19")).bean("hl7service", "handleA19").to("mock:a19")
                            // and A01 should invoke the handleA01 method on our
                            // hl7service bean
                            .when(header("CamelHL7TriggerEvent").isEqualTo("A01")).to("mock:a01").bean("hl7service", "handleA01")
                            .to("mock:a19")
                            // other types should go to mock:unknown
                            .otherwise().to("mock:unknown")
                            // end choice block
                            .end()
                            // marshal response back
                            .marshal(hl7);
                    // END SNIPPET: e1
                }
            };
        }
    }
    
 // START SNIPPET: e2
    public class MyHL7BusinessLogic {

        // This is a plain POJO that has NO imports whatsoever on Apache Camel.
        // its a plain POJO only importing the HAPI library so we can much
        // easier work with the HL7 format.

        public Message handleA19(Message msg) throws Exception {
            // here you can have your business logic for A19 messages
            assertTrue(msg instanceof QRY_A19);
            // just return the same dummy response
            return createADR19Message();
        }

        public Message handleA01(Message msg) throws Exception {
            // here you can have your business logic for A01 messages
            assertTrue(msg instanceof ADT_A01);
            // just return the same dummy response
            return createADT01Message(((ADT_A01) msg).getMSH().getMessageControlID().getValue());
        }
    }
    // END SNIPPET: e2

    private static Message createADR19Message() throws Exception {
        ADR_A19 adr = new ADR_A19();

        // Populate the MSH Segment
        MSH mshSegment = adr.getMSH();
        mshSegment.getFieldSeparator().setValue("|");
        mshSegment.getEncodingCharacters().setValue("^~\\&");
        mshSegment.getDateTimeOfMessage().getTimeOfAnEvent().setValue("200701011539");
        mshSegment.getSendingApplication().getNamespaceID().setValue("MYSENDER");
        mshSegment.getSequenceNumber().setValue("123");
        mshSegment.getMessageType().getMessageType().setValue("ADR");
        mshSegment.getMessageType().getTriggerEvent().setValue("A19");

        // Populate the PID Segment
        MSA msa = adr.getMSA();
        msa.getAcknowledgementCode().setValue("AA");
        msa.getMessageControlID().setValue("123");

        QRD qrd = adr.getQRD();
        qrd.getQueryDateTime().getTimeOfAnEvent().setValue("20080805120000");

        return adr.getMessage();
    }

    private static Message createADT01Message(String msgId) throws Exception {
        ADT_A01 adt = new ADT_A01();

        // Populate the MSH Segment
        MSH mshSegment = adt.getMSH();
        mshSegment.getFieldSeparator().setValue("|");
        mshSegment.getEncodingCharacters().setValue("^~\\&");
        mshSegment.getDateTimeOfMessage().getTimeOfAnEvent().setValue("200701011539");
        mshSegment.getSendingApplication().getNamespaceID().setValue("MYSENDER");
        mshSegment.getSequenceNumber().setValue("123");
        mshSegment.getMessageType().getMessageType().setValue("ADT");
        mshSegment.getMessageType().getTriggerEvent().setValue("A01");

        // Populate the PID Segment
        PID pid = adt.getPID();
        pid.getPatientName(0).getFamilyName().getSurname().setValue("Doe");
        pid.getPatientName(0).getGivenName().setValue("John");
        pid.getPatientIdentifierList(0).getID().setValue(msgId);

        return adt;
    }

}
