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/*
 * Copyright (C) 2020 Graylog, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Server Side Public License, version 1,
 * as published by MongoDB, Inc.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * Server Side Public License for more details.
 *
 * You should have received a copy of the Server Side Public License
 * along with this program. If not, see
 * .
 */
package org.graylog.plugins.sidecar.mapper;

import org.graylog.plugins.sidecar.rest.models.Sidecar;

import java.util.Arrays;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

import static java.util.regex.Pattern.CASE_INSENSITIVE;

public class SidecarStatusMapper {
    private static final String statusPattern = Arrays.stream(Sidecar.Status.values()).map(Enum::toString).collect(Collectors.joining("|"));
    private static final Pattern searchQueryStatusRegex = Pattern.compile("\\bstatus:(" + statusPattern + ")\\b", CASE_INSENSITIVE);

    /**
     * Replaces status strings in search query with their number representations,
     * e.g. status:running will be transformed into status:0.
     *
     * @param query Search query that may contain one or more status strings
     * @return Search query with all status strings replaced with status codes
     */
    public String replaceStringStatusSearchQuery(String query) {
        final Matcher matcher = searchQueryStatusRegex.matcher(query);
        final StringBuffer stringBuffer = new StringBuffer();
        while(matcher.find()) {
            final String status = matcher.group(1);
            matcher.appendReplacement(stringBuffer, "status:" + Sidecar.Status.fromString(status).getStatusCode());
        }
        matcher.appendTail(stringBuffer);
        return stringBuffer.toString();
    }
}