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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.messageprocessors;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.auto.value.AutoValue;
import org.graylog.autovalue.WithBeanGetter;
import org.graylog2.plugin.messageprocessors.MessageProcessor;

import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;

@JsonAutoDetect
@AutoValue
@WithBeanGetter
public abstract class MessageProcessorsConfigWithDescriptors {
    @JsonProperty("processor_order")
    public abstract List processorOrder();

    @JsonProperty("disabled_processors")
    public abstract Set disabledProcessors();

    @JsonCreator
    public static MessageProcessorsConfigWithDescriptors create(@JsonProperty("processor_order") List processorOrder,
                                                                @JsonProperty("disabled_processors") Set disabledProcessors) {
        return builder()
                .processorOrder(processorOrder)
                .disabledProcessors(disabledProcessors)
                .build();
    }

    public static MessageProcessorsConfigWithDescriptors fromConfig(MessageProcessorsConfig config,
                                                                    Set descriptors) {
        final Map descriptorMap = descriptors.stream()
                .collect(Collectors.toMap(MessageProcessor.Descriptor::className, descriptor -> descriptor));

        return builder()
                .processorOrder(config.processorOrder().stream()
                        .map(s -> MessageProcessorDescriptor.fromDescriptor(descriptorMap.get(s)))
                        .collect(Collectors.toList()))
                .disabledProcessors(config.disabledProcessors())
                .build();
    }

    public MessageProcessorsConfig toConfig() {
        return MessageProcessorsConfig.builder()
                .processorOrder(processorOrder().stream()
                        .map(MessageProcessorDescriptor::className)
                        .collect(Collectors.toList()))
                .disabledProcessors(disabledProcessors())
                .build();
    }

    public static Builder builder() {
        return new AutoValue_MessageProcessorsConfigWithDescriptors.Builder();
    }

    public abstract Builder toBuilder();

    @AutoValue.Builder
    public static abstract class Builder {
        public abstract Builder processorOrder(List processorOrder);

        public abstract Builder disabledProcessors(Set disabledMessageProcessors);

        public abstract MessageProcessorsConfigWithDescriptors build();
    }
}