/*
 * 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.CamelContext;
import org.apache.camel.CamelExecutionException;
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.mock.MockEndpoint;
import org.apache.camel.spring.boot.CamelAutoConfiguration;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertInstanceOf;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;

import ca.uhn.hl7v2.DefaultHapiContext;
import ca.uhn.hl7v2.HL7Exception;
import ca.uhn.hl7v2.HapiContext;
import ca.uhn.hl7v2.Version;
import ca.uhn.hl7v2.model.DataTypeException;
import ca.uhn.hl7v2.model.Message;
import ca.uhn.hl7v2.model.v24.message.ADT_A01;
import ca.uhn.hl7v2.model.v24.segment.PID;
import ca.uhn.hl7v2.parser.GenericParser;
import ca.uhn.hl7v2.parser.Parser;
import ca.uhn.hl7v2.validation.ValidationContext;
import ca.uhn.hl7v2.validation.ValidationException;
import ca.uhn.hl7v2.validation.builder.ValidationRuleBuilder;
import ca.uhn.hl7v2.validation.impl.NoValidation;
import ca.uhn.hl7v2.validation.impl.ValidationContextFactory;

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, HL7ValidateTest.class,
        HL7ValidateTest.TestConfiguration.class })
public class HL7ValidateTest extends HL7TestSupport {

    @Autowired
    CamelContext camelContext;

    @Autowired
    ProducerTemplate template;

    @EndpointInject("mock:unmarshal")
    MockEndpoint mockUnmarshal;

    @EndpointInject("mock:end")
    MockEndpoint mockEnd;

    static HL7DataFormat hl7;

    @Test
    public void testUnmarshalFailed() throws Exception {
        mockUnmarshal.reset();
        mockUnmarshal.expectedMessageCount(0);

        String body = createHL7AsString();
        try {
            template.sendBody("direct:unmarshalFailed", body);
            fail("Should have thrown exception");
        } catch (CamelExecutionException e) {
            assertInstanceOf(HL7Exception.class, e.getCause());
            assertInstanceOf(DataTypeException.class, e.getCause());
            assertTrue(
                    e.getCause().getMessage()
                            .startsWith("ca.uhn.hl7v2.validation.ValidationException: Validation failed:"),
                    "Should be a validation error message");
        }

        mockUnmarshal.assertIsSatisfied();
    }

    @Test
    public void testUnmarshalOk() throws Exception {
        mockUnmarshal.reset();
        mockUnmarshal.expectedMessageCount(1);

        String body = createHL7AsString();
        template.sendBody("direct:unmarshalOk", body);

        mockUnmarshal.assertIsSatisfied();
    }

    @Test
    public void testUnmarshalOkCustom() throws Exception {
        mockUnmarshal.reset();
        mockUnmarshal.expectedMessageCount(1);
        String body = createHL7AsString();
        template.sendBody("direct:unmarshalOkCustom", body);

        mockUnmarshal.assertIsSatisfied();
    }

    @Test
    public void testMarshalWithValidation() throws Exception {
        mockEnd.reset();
        mockEnd.expectedMessageCount(0);

        Message message = createADT01Message();
        try {
            template.sendBody("direct:start1", message);
            fail("Should have thrown exception");
        } catch (CamelExecutionException e) {
            assertInstanceOf(HL7Exception.class, e.getCause());
            assertInstanceOf(ValidationException.class, e.getCause().getCause());
            System.out.println(e.getCause().getCause().getMessage());
            assertTrue(e.getCause().getCause().getMessage().startsWith("Validation failed:"),
                    "Should be a validation error message");
        }

        mockEnd.assertIsSatisfied();
    }

    @Test
    public void testMarshalWithoutValidation() throws Exception {
        mockEnd.reset();
        mockEnd.expectedMessageCount(1);

        Message message = createADT01Message();
        template.sendBody("direct:start2", message);

        mockEnd.assertIsSatisfied();
    }

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

    @Configuration
    public class TestConfiguration {

        @Bean
        public RouteBuilder routeBuilder() {
            HapiContext hapiContext = new DefaultHapiContext();
            hapiContext.setValidationContext(new NoValidation());
            Parser p = new GenericParser(hapiContext);
            hl7 = new HL7DataFormat();
            hl7.setParser(p);

            /*
             * Let's start by adding a validation rule to the default validation that disallows PID-2 to be empty.
             */
            ValidationRuleBuilder builder = new ValidationRuleBuilder() {
                private static final long serialVersionUID = 1L;

                @Override
                protected void configure() {
                    forVersion(Version.V24).message("ADT", "*").terser("PID-2", not(empty()));
                }
            };
            ValidationContext customValidationContext = ValidationContextFactory.fromBuilder(builder);

            HapiContext customContext = new DefaultHapiContext(customValidationContext);
            final Parser customParser = new GenericParser(customContext);

            camelContext.getRegistry().bind("myParser", customParser);

            return new RouteBuilder() {
                public void configure() throws Exception {
                    from("direct:unmarshalFailed").unmarshal().hl7().to("mock:unmarshal");
                    from("direct:unmarshalOk").unmarshal().hl7(false).to("mock:unmarshal");
                    from("direct:unmarshalOkCustom").unmarshal(hl7).to("mock:unmarshal");
                    from("direct:start1").marshal().hl7("myParser").to("mock:end");
                    from("direct:start2").marshal().hl7(true).to("mock:end");

                }
            };
        }
    }

    private static String createHL7AsString() {
        String line1 = "MSH|^~\\&|REQUESTING|ICE|INHOUSE|RTH00|20080808093202||ORM^O01|0808080932027444985|P|2.4|||AL|NE|||";
        String line2 = "PID|1||ICE999999^^^ICE^ICE||Testpatient^Testy^^^Mr||19740401|M|||123 Barrel Drive^^^^SW18 4RT|||||2||||||||||||||";
        String line3 = "NTE|1||Free text for entering clinical details|";
        String line4 = "PV1|1||^^^^^^^^Admin Location|||||||||||||||NHS|";
        String line5 = "ORC|NW|213||175|REQ||||20080808093202|ahsl^^Administrator||G999999^TestDoctor^GPtests^^^^^^NAT|^^^^^^^^Admin Location | 819600|200808080932||RTH00||ahsl^^Administrator||";
        String line6 = "OBR|1|213||CCOR^Serum Cortisol ^ JRH06|||200808080932||0.100||||||^|G999999^TestDoctor^GPtests^^^^^^NAT|819600|ADM162||||||820|||^^^^^R||||||||";
        String line7 = "OBR|2|213||GCU^Serum Copper ^ JRH06 |||200808080932||0.100||||||^|G999999^TestDoctor^GPtests^^^^^^NAT|819600|ADM162||||||820|||^^^^^R||||||||";
        String line8 = "OBR|3|213||THYG^Serum Thyroglobulin ^JRH06|||200808080932||0.100||||||^|G999999^TestDoctor^GPtests^^^^^^NAT|819600|ADM162||||||820|||^^^^^R||||||||";

        StringBuilder body = new StringBuilder();
        body.append(line1);
        body.append("\r");
        body.append(line2);
        body.append("\r");
        body.append(line3);
        body.append("\r");
        body.append(line4);
        body.append("\r");
        body.append(line5);
        body.append("\r");
        body.append(line6);
        body.append("\r");
        body.append(line7);
        body.append("\r");
        body.append(line8);
        return body.toString();
    }

    private static Message createADT01Message() throws Exception {
        ADT_A01 adt = new ADT_A01();
        adt.initQuickstart("ADT", "A01", "P");

        // Populate the PID Segment
        PID pid = adt.getPID();
        pid.getPatientName(0).getFamilyName().getSurname().setValue("Doe");
        pid.getPatientName(0).getGivenName().setValue("John");
        pid.getPhoneNumberBusiness(0).getPhoneNumber().setValue("333123456");
        pid.getPatientIdentifierList(0).getID().setValue("123456");

        return adt;
    }

}
