package ca.uhn.fhir.jpa.subscription.model;

/*-
 * #%L
 * HAPI FHIR Subscription Server
 * %%
 * Copyright (C) 2014 - 2021 Smile CDR, Inc.
 * %%
 * Licensed 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.
 * #L%
 */

import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.model.api.IModelJson;
import com.fasterxml.jackson.annotation.JsonProperty;
import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.hl7.fhir.instance.model.api.IIdType;
import org.hl7.fhir.instance.model.api.IPrimitiveType;
import org.hl7.fhir.r4.model.IdType;
import org.hl7.fhir.r4.model.Subscription;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static org.apache.commons.lang3.StringUtils.isNotBlank;

public class CanonicalSubscription implements Serializable, Cloneable, IModelJson {

        private static final long serialVersionUID = 1L;

        @JsonProperty("id")
        private String myIdElement;
        @JsonProperty("criteria")
        private String myCriteriaString;
        @JsonProperty("endpointUrl")
        private String myEndpointUrl;
        @JsonProperty("payload")
        private String myPayloadString;
        @JsonProperty("headers")
        private List<String> myHeaders;
        @JsonProperty("channelType")
        private CanonicalSubscriptionChannelType myChannelType;
        @JsonProperty("status")
        private Subscription.SubscriptionStatus myStatus;
        @JsonProperty("triggerDefinition")
        private CanonicalEventDefinition myTrigger;
        @JsonProperty("emailDetails")
        private EmailDetails myEmailDetails;
        @JsonProperty("restHookDetails")
        private RestHookDetails myRestHookDetails;
        @JsonProperty("extensions")
        private Map<String, List<String>> myChannelExtensions;
        @JsonProperty("payloadSearchCriteria")
        private String myPayloadSearchCriteria;

        /**
         * Constructor
         */
        public CanonicalSubscription() {
                super();
        }

        public String getPayloadSearchCriteria() {
                return myPayloadSearchCriteria;
        }

        public void setPayloadSearchCriteria(String thePayloadSearchCriteria) {
                myPayloadSearchCriteria = thePayloadSearchCriteria;
        }

        /**
         * For now we're using the R4 TriggerDefinition, but this
         * may change in the future when things stabilize
         */
        public void addTrigger(CanonicalEventDefinition theTrigger) {
                myTrigger = theTrigger;
        }

        public CanonicalSubscriptionChannelType getChannelType() {
                return myChannelType;
        }

        public void setChannelType(CanonicalSubscriptionChannelType theChannelType) {
                myChannelType = theChannelType;
        }

        public String getCriteriaString() {
                return myCriteriaString;
        }

        public void setCriteriaString(String theCriteriaString) {
                myCriteriaString = theCriteriaString;
        }

        public EmailDetails getEmailDetails() {
                if (myEmailDetails == null) {
                        myEmailDetails = new EmailDetails();
                }
                return myEmailDetails;
        }

        public String getEndpointUrl() {
                return myEndpointUrl;
        }

        public void setEndpointUrl(String theEndpointUrl) {
                myEndpointUrl = theEndpointUrl;
        }

        @Nonnull
        public List<String> getHeaders() {
                return myHeaders != null ? Collections.unmodifiableList(myHeaders) : Collections.emptyList();
        }

        public void setHeaders(List<? extends IPrimitiveType<String>> theHeader) {
                myHeaders = new ArrayList<>();
                for (IPrimitiveType<String> next : theHeader) {
                        if (isNotBlank(next.getValueAsString())) {
                                myHeaders.add(next.getValueAsString());
                        }
                }
        }

        public void setHeaders(String theHeaders) {
                myHeaders = new ArrayList<>();
                if (isNotBlank(theHeaders)) {
                        myHeaders.add(theHeaders);
                }
        }

        public String getChannelExtension(String theUrl) {
                String retVal = null;
                List<String> strings = myChannelExtensions.get(theUrl);
                if (strings != null && strings.isEmpty() == false) {
                        retVal = strings.get(0);
                }
                return retVal;
        }

        @Nonnull
        public List<String> getChannelExtensions(String theUrl) {
                List<String> retVal = myChannelExtensions.get(theUrl);
                if (retVal == null) {
                        retVal = Collections.emptyList();
                } else {
                        retVal = Collections.unmodifiableList(retVal);
                }
                return retVal;
        }

        public void setChannelExtensions(Map<String, List<String>> theChannelExtensions) {
                myChannelExtensions = new HashMap<>();
                for (String url : theChannelExtensions.keySet()) {
                        List<String> values = theChannelExtensions.get(url);
                        if (isNotBlank(url) && values != null) {
                                myChannelExtensions.put(url, values);
                        }
                }
        }

        @Nullable
        public IIdType getIdElement(FhirContext theContext) {
                IIdType retVal = null;
                if (isNotBlank(myIdElement)) {
                        retVal = theContext.getVersion().newIdType().setValue(myIdElement);
                }
                return retVal;
        }

        public String getIdPart() {
                return new IdType(getIdElementString()).getIdPart();
        }

        public String getIdElementString() {
                return myIdElement;
        }

        public String getPayloadString() {
                return myPayloadString;
        }

        public void setPayloadString(String thePayloadString) {
                myPayloadString = thePayloadString;
        }

        public RestHookDetails getRestHookDetails() {
                if (myRestHookDetails == null) {
                        myRestHookDetails = new RestHookDetails();
                }
                return myRestHookDetails;
        }

        public Subscription.SubscriptionStatus getStatus() {
                return myStatus;
        }

        public void setStatus(Subscription.SubscriptionStatus theStatus) {
                myStatus = theStatus;
        }

        /**
         * For now we're using the R4 triggerdefinition, but this
         * may change in the future when things stabilize
         */
        public CanonicalEventDefinition getTrigger() {
                return myTrigger;
        }

        @Override
        public boolean equals(Object theO) {
                if (this == theO) return true;

                if (theO == null || getClass() != theO.getClass()) return false;

                CanonicalSubscription that = (CanonicalSubscription) theO;

                EqualsBuilder b = new EqualsBuilder();
                b.append(myIdElement, that.myIdElement);
                b.append(myCriteriaString, that.myCriteriaString);
                b.append(myEndpointUrl, that.myEndpointUrl);
                b.append(myPayloadString, that.myPayloadString);
                b.append(myHeaders, that.myHeaders);
                b.append(myChannelType, that.myChannelType);
                b.append(myStatus, that.myStatus);
                b.append(myTrigger, that.myTrigger);
                b.append(myEmailDetails, that.myEmailDetails);
                b.append(myRestHookDetails, that.myRestHookDetails);
                b.append(myChannelExtensions, that.myChannelExtensions);
                return b.isEquals();
        }

        @Override
        public int hashCode() {
                return new HashCodeBuilder(17, 37)
                        .append(myIdElement)
                        .append(myCriteriaString)
                        .append(myEndpointUrl)
                        .append(myPayloadString)
                        .append(myHeaders)
                        .append(myChannelType)
                        .append(myStatus)
                        .append(myTrigger)
                        .append(myEmailDetails)
                        .append(myRestHookDetails)
                        .append(myChannelExtensions)
                        .toHashCode();
        }

        public void setIdElement(IIdType theIdElement) {
                myIdElement = null;
                if (theIdElement != null) {
                        myIdElement = theIdElement.toUnqualifiedVersionless().getValue();
                }
        }

        /**
         * Adds a header
         *
         * @param theHeader The header, e.g. "Authorization: Bearer AAAAA"
         */
        public void addHeader(String theHeader) {
                if (isNotBlank(theHeader)) {
                        initHeaders();
                        myHeaders.add(theHeader);
                }
        }

        private void initHeaders() {
                if (myHeaders == null) {
                        myHeaders = new ArrayList<>();
                }
        }

        @Override
        public String toString() {
                return new ToStringBuilder(this)
                        .append("myIdElement", myIdElement)
                        .append("myStatus", myStatus)
                        .append("myCriteriaString", myCriteriaString)
                        .append("myEndpointUrl", myEndpointUrl)
                        .append("myPayloadString", myPayloadString)
//                      .append("myHeaders", myHeaders)
                        .append("myChannelType", myChannelType)
//                      .append("myTrigger", myTrigger)
//                      .append("myEmailDetails", myEmailDetails)
//                      .append("myRestHookDetails", myRestHookDetails)
//                      .append("myChannelExtensions", myChannelExtensions)
                        .toString();
        }

        public static class EmailDetails implements IModelJson {

                @JsonProperty("from")
                private String myFrom;
                @JsonProperty("subjectTemplate")
                private String mySubjectTemplate;

                /**
                 * Construcor
                 */
                public EmailDetails() {
                        super();
                }

                public String getFrom() {
                        return myFrom;
                }

                public void setFrom(String theFrom) {
                        myFrom = theFrom;
                }

                public String getSubjectTemplate() {
                        return mySubjectTemplate;
                }

                public void setSubjectTemplate(String theSubjectTemplate) {
                        mySubjectTemplate = theSubjectTemplate;
                }

                @Override
                public boolean equals(Object theO) {
                        if (this == theO) return true;

                        if (theO == null || getClass() != theO.getClass()) return false;

                        EmailDetails that = (EmailDetails) theO;

                        return new EqualsBuilder()
                                .append(myFrom, that.myFrom)
                                .append(mySubjectTemplate, that.mySubjectTemplate)
                                .isEquals();
                }

                @Override
                public int hashCode() {
                        return new HashCodeBuilder(17, 37)
                                .append(myFrom)
                                .append(mySubjectTemplate)
                                .toHashCode();
                }
        }

        public static class RestHookDetails implements IModelJson {

                @JsonProperty("stripVersionId")
                private boolean myStripVersionId;
                @JsonProperty("deliverLatestVersion")
                private boolean myDeliverLatestVersion;

                /**
                 * Constructor
                 */
                public RestHookDetails() {
                        super();
                }

                public boolean isDeliverLatestVersion() {
                        return myDeliverLatestVersion;
                }

                public void setDeliverLatestVersion(boolean theDeliverLatestVersion) {
                        myDeliverLatestVersion = theDeliverLatestVersion;
                }


                public boolean isStripVersionId() {
                        return myStripVersionId;
                }

                public void setStripVersionId(boolean theStripVersionId) {
                        myStripVersionId = theStripVersionId;
                }

                @Override
                public boolean equals(Object theO) {
                        if (this == theO) return true;

                        if (theO == null || getClass() != theO.getClass()) return false;

                        RestHookDetails that = (RestHookDetails) theO;

                        return new EqualsBuilder()
                                .append(myStripVersionId, that.myStripVersionId)
                                .append(myDeliverLatestVersion, that.myDeliverLatestVersion)
                                .isEquals();
                }

                @Override
                public int hashCode() {
                        return new HashCodeBuilder(17, 37)
                                .append(myStripVersionId)
                                .append(myDeliverLatestVersion)
                                .toHashCode();
                }

        }

        public static class CanonicalEventDefinition implements IModelJson {

                /**
                 * Constructor
                 */
                public CanonicalEventDefinition() {
                        // nothing yet
                }

        }
}