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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.graylog2.rest.models.system.responses;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableMap;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

@JsonAutoDetect
@AutoValue
public abstract class LocalesResponse {
    @JsonProperty("locales")
    public abstract ImmutableMap locales();

    public static LocalesResponse create(Locale[] locales) {
        final Map localeMap = new HashMap<>();
        Arrays.stream(locales)
                .map(LocaleDescription::create)
                .forEach(localeDescription -> localeMap.put(localeDescription.languageTag(), localeDescription));
        return new AutoValue_LocalesResponse(ImmutableMap.copyOf(localeMap));
    }

    @JsonAutoDetect
    @AutoValue
    public static abstract class LocaleDescription {
        @JsonProperty("language_tag")
        public abstract String languageTag();

        @JsonProperty("display_name")
        public abstract String displayName();

        public static LocaleDescription create(Locale locale) {
            return create(locale.toLanguageTag(), locale.getDisplayName(Locale.ENGLISH));
        }

        private static LocaleDescription create(String languageTag, String displayName) {
            return new AutoValue_LocalesResponse_LocaleDescription(languageTag, displayName);
        }
    }
}