/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.
 */

package org.apache.kafka.message;

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

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Objects;

public final class StructSpec {
    private final String name;

    private final Versions versions;

    private final List<FieldSpec> fields;

    private final boolean hasKeys;

    @JsonCreator
    public StructSpec(@JsonProperty("name") String name,
                      @JsonProperty("versions") String versions,
                      @JsonProperty("fields") List<FieldSpec> fields) {
        this.name = Objects.requireNonNull(name);
        this.versions = Versions.parse(versions, null);
        if (this.versions == null) {
            throw new RuntimeException("You must specify the version of the " +
                    name + " structure.");
        }
        this.fields = Collections.unmodifiableList(fields == null ?
            Collections.emptyList() : new ArrayList<>(fields));
        this.hasKeys = this.fields.stream().anyMatch(f -> f.mapKey());
    }

    @JsonProperty
    public String name() {
        return name;
    }

    public Versions versions() {
        return versions;
    }

    @JsonProperty
    public String versionsString() {
        return versions.toString();
    }

    @JsonProperty
    public List<FieldSpec> fields() {
        return fields;
    }

    boolean hasKeys() {
        return hasKeys;
    }
}