/*
 * #%L
 * HAPI FHIR JPA Server
 * %%
 * Copyright (C) 2014 - 2024 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%
 */
package ca.uhn.fhir.jpa.entity;

import ca.uhn.fhir.i18n.Msg;
import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.Id;
import jakarta.persistence.Lob;
import org.apache.commons.io.IOUtils;
import org.hibernate.annotations.Immutable;
import org.hibernate.annotations.Subselect;

import java.io.IOException;
import java.io.Reader;
import java.io.Serializable;
import java.sql.Clob;
import java.sql.SQLException;

@Entity
@Immutable
@Subselect(
                /*
                 * Note about the CONCAT function below- We need a primary key (an @Id) column
                 * because hibernate won't allow the view the function without it, but
                 */
                "SELECT CONCAT_WS(' ', vsc.PID, vscd.PID) AS PID, " + "       vsc.PID                         AS CONCEPT_PID, "
                                + "       vsc.VALUESET_PID                AS CONCEPT_VALUESET_PID, "
                                + "       vsc.VALUESET_ORDER              AS CONCEPT_VALUESET_ORDER, "
                                + "       vsc.SYSTEM_URL                  AS CONCEPT_SYSTEM_URL, "
                                + "       vsc.CODEVAL                     AS CONCEPT_CODEVAL, "
                                + "       vsc.DISPLAY                     AS CONCEPT_DISPLAY, "
                                + "       vsc.SYSTEM_VER                  AS SYSTEM_VER, "
                                + "       vsc.SOURCE_PID                  AS SOURCE_PID, "
                                + "       vsc.SOURCE_DIRECT_PARENT_PIDS   AS SOURCE_DIRECT_PARENT_PIDS, "
                                + "       vscd.PID                        AS DESIGNATION_PID, "
                                + "       vscd.LANG                       AS DESIGNATION_LANG, "
                                + "       vscd.USE_SYSTEM                 AS DESIGNATION_USE_SYSTEM, "
                                + "       vscd.USE_CODE                   AS DESIGNATION_USE_CODE, "
                                + "       vscd.USE_DISPLAY                AS DESIGNATION_USE_DISPLAY, "
                                + "       vscd.VAL                        AS DESIGNATION_VAL "
                                + "FROM TRM_VALUESET_CONCEPT vsc "
                                + "LEFT OUTER JOIN TRM_VALUESET_C_DESIGNATION vscd ON vsc.PID = vscd.VALUESET_CONCEPT_PID")
public class TermValueSetConceptView implements Serializable, ITermValueSetConceptView {
        private static final long serialVersionUID = 1L;

        @Id
        @Column(name = "PID", length = 1000 /* length only needed to satisfy JpaEntityTest, it's not used*/)
        private String id; // still set automatically

        @Column(name = "CONCEPT_PID")
        private Long myConceptPid;

        @Column(name = "CONCEPT_VALUESET_PID")
        private Long myConceptValueSetPid;

        @Column(name = "CONCEPT_VALUESET_ORDER")
        private int myConceptOrder;

        @Column(name = "CONCEPT_SYSTEM_URL", length = TermCodeSystem.MAX_URL_LENGTH)
        private String myConceptSystemUrl;

        @Column(name = "CONCEPT_CODEVAL", length = TermConcept.MAX_CODE_LENGTH)
        private String myConceptCode;

        @Column(name = "CONCEPT_DISPLAY", length = TermConcept.MAX_DESC_LENGTH)
        private String myConceptDisplay;

        @Column(name = "SYSTEM_VER", length = TermCodeSystemVersion.MAX_VERSION_LENGTH)
        private String myConceptSystemVersion;

        @Column(name = "DESIGNATION_PID")
        private Long myDesignationPid;

        @Column(name = "DESIGNATION_LANG", length = TermConceptDesignation.MAX_LENGTH)
        private String myDesignationLang;

        @Column(name = "DESIGNATION_USE_SYSTEM", length = TermConceptDesignation.MAX_LENGTH)
        private String myDesignationUseSystem;

        @Column(name = "DESIGNATION_USE_CODE", length = TermConceptDesignation.MAX_LENGTH)
        private String myDesignationUseCode;

        @Column(name = "DESIGNATION_USE_DISPLAY", length = TermConceptDesignation.MAX_LENGTH)
        private String myDesignationUseDisplay;

        @Column(name = "DESIGNATION_VAL", length = TermConceptDesignation.MAX_VAL_LENGTH)
        private String myDesignationVal;

        @Column(name = "SOURCE_PID", nullable = true)
        private Long mySourceConceptPid;

        @Lob
        @Column(name = "SOURCE_DIRECT_PARENT_PIDS", nullable = true)
        private Clob mySourceConceptDirectParentPids;

        @Override
        public Long getSourceConceptPid() {
                return mySourceConceptPid;
        }

        @Override
        public String getSourceConceptDirectParentPids() {
                if (mySourceConceptDirectParentPids != null) {
                        try (Reader characterStream = mySourceConceptDirectParentPids.getCharacterStream()) {
                                return IOUtils.toString(characterStream);
                        } catch (IOException | SQLException e) {
                                throw new InternalErrorException(Msg.code(828) + e);
                        }
                }
                return null;
        }

        @Override
        public Long getConceptPid() {
                return myConceptPid;
        }

        @Override
        public String getConceptSystemUrl() {
                return myConceptSystemUrl;
        }

        @Override
        public String getConceptCode() {
                return myConceptCode;
        }

        @Override
        public String getConceptDisplay() {
                return myConceptDisplay;
        }

        @Override
        public Long getDesignationPid() {
                return myDesignationPid;
        }

        @Override
        public String getDesignationLang() {
                return myDesignationLang;
        }

        @Override
        public String getDesignationUseSystem() {
                return myDesignationUseSystem;
        }

        @Override
        public String getDesignationUseCode() {
                return myDesignationUseCode;
        }

        @Override
        public String getDesignationUseDisplay() {
                return myDesignationUseDisplay;
        }

        @Override
        public String getDesignationVal() {
                return myDesignationVal;
        }

        @Override
        public String getConceptSystemVersion() {
                return myConceptSystemVersion;
        }
}