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/*
 * Copyright (c) CQSE GmbH
 *
 * 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.
 */

package org.conqat.engine.index.shared;

import java.util.Comparator;

import org.conqat.engine.commons.findings.DetachedFinding;
import org.conqat.engine.commons.findings.location.ElementLocation;
import org.conqat.lib.commons.test.IndexValueClass;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;

/**
 * A {@link DetachedFinding} with additional attributes required for index-based analysis.
 *
 * This class is used as DTO during communication with IDE clients via
 * {@link com.teamscale.ide.commons.client.IIdeServiceClient}, special care has to be taken when
 * changing its signature!
 */
@IndexValueClass(containedInBackup = true)
public class IndexFinding extends DetachedFinding {

	/** Version for serialization. */
	private static final long serialVersionUID = 1;

	/** A comparator for stable sorting of {@link IndexFinding}s. */
	public static final Comparator STABLE_INDEX_FINDING_COMPARATOR = Comparator
			.comparing(IndexFinding::getLocationString).thenComparing(IndexFinding::getTypeId)
			.thenComparing(IndexFinding::getMessage);

	/**
	 * Value for {@link #analysisTimestamp} that indicates that there is no timestamp available (i.e.,
	 * the finding is created by a Teamscale-internal analysis).
	 */
	public static final long NO_TIMESTAMP = -1;

	/** The separator for components of a finding type ID. */
	public static final String TYPE_ID_SEPARATOR = "/";

	/**
	 * The timestamp of the analysis creating this finding. This is {@link #NO_TIMESTAMP} if the finding
	 * is updated in real-time (i.e., is created by a Teamscale-internal analysis).
	 * 
	 * A better field name would be "externalAnalysisTimestamp" since it is always {@link #NO_TIMESTAMP}
	 * for internal-analysis findings, but that rename would require a migration.
	 */
	@JsonProperty("analysisTimestamp")
	private long analysisTimestamp = NO_TIMESTAMP;

	/** A unique ID for the type of finding. */
	@JsonProperty("typeId")
	private final String typeId;

	/** Constructor. */
	public IndexFinding(DetachedFinding finding, long analysisTimestamp) {
		super(finding);
		this.analysisTimestamp = analysisTimestamp;
		this.typeId = determineTypeId();
	}

	public IndexFinding(DetachedFinding finding, long analysisTimestamp, String typeId) {
		super(finding);
		this.analysisTimestamp = analysisTimestamp;
		this.typeId = typeId;
	}

	/**
	 * Creates a {@link IndexFinding} from a {@link DetachedFinding}.
	 */
	public static IndexFinding asRealtimeFinding(DetachedFinding finding) {
		return new IndexFinding(finding, NO_TIMESTAMP);
	}

	@JsonCreator
	public IndexFinding(@JsonProperty(GROUP_NAME_PROPERTY) String groupName,
			@JsonProperty(CATEGORY_NAME_PROPERTY) String categoryName, @JsonProperty(MESSAGE_PROPERTY) String message,
			@JsonProperty(LOCATION_PROPERTY) ElementLocation location) {
		super(groupName, categoryName, message, location);
		this.typeId = determineTypeId();
	}

	/** Returns the type ID to be used during construction. */
	private String determineTypeId() {
		return makeFindingTypeId(getCategoryName(), getGroupName());
	}

	/** Creates a finding type ID for given category and group. */
	public static String makeFindingTypeId(String category, String group) {
		return category + TYPE_ID_SEPARATOR + group;
	}

	/** Copy constructor. */
	public IndexFinding(IndexFinding other) {
		super(other);
		this.analysisTimestamp = other.analysisTimestamp;
		this.typeId = other.typeId;
	}

	/**
	 * Returns the analysis timestamp. This may be {@link #NO_TIMESTAMP} to indicate that no analysis
	 * timestamp is available.
	 */
	public long getAnalysisTimestamp() {
		return analysisTimestamp;
	}

	/** Sets the analysis timestamp. */
	public void setAnalysisTimestamp(long timestamp) {
		this.analysisTimestamp = timestamp;
	}

	/** Returns the type id of this finding. */
	public String getTypeId() {
		return typeId;
	}

	/**
	 * Checks whether the finding is updated in real-time (whether this is an external-upload finding).
	 * 
	 * @return true if the finding is updated in real-time (created by a Teamscale-internal
	 *         analysis during analysis of a commit), false if it is created for an
	 *         explicit timestamp from an external finding upload (via one of the finding-report formats
	 *         or {@link com.teamscale.service.external.input.SimpleExternalFindingImportService}).
	 */
	public boolean isRealTime() {
		return analysisTimestamp == NO_TIMESTAMP;
	}
}