/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.
 */

/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.index.mapper;

import org.apache.lucene.document.Field;
import org.opensearch.common.annotation.PublicApi;
import org.opensearch.common.xcontent.XContentType;
import org.opensearch.core.common.bytes.BytesReference;
import org.opensearch.core.xcontent.MediaType;
import org.opensearch.index.mapper.MapperService.MergeReason;
import org.opensearch.index.mapper.ParseContext.Document;

import java.util.List;

/**
 * The result of parsing a document.
 *
 * @opensearch.api
 */
@PublicApi(since = "1.0.0")
public class ParsedDocument {

    private final Field version;

    private final String id;
    private final SeqNoFieldMapper.SequenceIDFields seqID;

    private final String routing;

    private final List<Document> documents;

    private BytesReference source;
    private MediaType mediaType;

    private Mapping dynamicMappingsUpdate;

    public ParsedDocument(
        Field version,
        SeqNoFieldMapper.SequenceIDFields seqID,
        String id,
        String routing,
        List<Document> documents,
        BytesReference source,
        MediaType mediaType,
        Mapping dynamicMappingsUpdate
    ) {
        this.version = version;
        this.seqID = seqID;
        this.id = id;
        this.routing = routing;
        this.documents = documents;
        this.source = source;
        this.dynamicMappingsUpdate = dynamicMappingsUpdate;
        this.mediaType = mediaType;
    }

    public String id() {
        return this.id;
    }

    public Field version() {
        return version;
    }

    public void updateSeqID(long sequenceNumber, long primaryTerm) {
        this.seqID.seqNo.setLongValue(sequenceNumber);
        this.seqID.seqNoDocValue.setLongValue(sequenceNumber);
        this.seqID.primaryTerm.setLongValue(primaryTerm);
    }

    /**
     * Makes the processing document as a tombstone document rather than a regular document.
     * Tombstone documents are stored in Lucene index to represent delete operations or Noops.
     */
    ParsedDocument toTombstone() {
        assert docs().size() == 1 : "Tombstone should have a single doc [" + docs() + "]";
        this.seqID.tombstoneField.setLongValue(1);
        rootDoc().add(this.seqID.tombstoneField);
        return this;
    }

    public String routing() {
        return this.routing;
    }

    public Document rootDoc() {
        return documents.get(documents.size() - 1);
    }

    public List<Document> docs() {
        return this.documents;
    }

    public BytesReference source() {
        return this.source;
    }

    public MediaType getMediaType() {
        return this.mediaType;
    }

    public void setSource(BytesReference source, XContentType xContentType) {
        this.source = source;
        this.mediaType = xContentType;
    }

    /**
     * Return dynamic updates to mappings or {@code null} if there were no
     * updates to the mappings.
     */
    public Mapping dynamicMappingsUpdate() {
        return dynamicMappingsUpdate;
    }

    public void addDynamicMappingsUpdate(Mapping update) {
        if (dynamicMappingsUpdate == null) {
            dynamicMappingsUpdate = update;
        } else {
            dynamicMappingsUpdate = dynamicMappingsUpdate.merge(update, MergeReason.MAPPING_UPDATE);
        }
    }

    @Override
    public String toString() {
        return "Document id[" + id + "] doc [" + documents + ']';
    }

}
