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/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.client.transform;

import org.elasticsearch.client.Validatable;
import org.elasticsearch.client.ValidationException;
import org.elasticsearch.client.transform.transforms.TransformConfig;
import org.elasticsearch.xcontent.ToXContentObject;
import org.elasticsearch.xcontent.XContentBuilder;

import java.io.IOException;
import java.util.Objects;
import java.util.Optional;

public class PutTransformRequest implements ToXContentObject, Validatable {

    public static final String DEFER_VALIDATION = "defer_validation";
    private final TransformConfig config;
    private Boolean deferValidation;

    public PutTransformRequest(TransformConfig config) {
        this.config = config;
    }

    public TransformConfig getConfig() {
        return config;
    }

    public Boolean getDeferValidation() {
        return deferValidation;
    }

    /**
     * Indicates if deferrable validations should be skipped until the transform starts
     *
     * @param deferValidation {@code true} will cause validations to be deferred
     */
    public void setDeferValidation(boolean deferValidation) {
        this.deferValidation = deferValidation;
    }

    @Override
    public Optional validate() {
        ValidationException validationException = new ValidationException();
        if (config == null) {
            validationException.addValidationError("put requires a non-null transform config");
            return Optional.of(validationException);
        } else {
            if (config.getId() == null) {
                validationException.addValidationError("transform id cannot be null");
            }
            if (config.getSource() == null) {
                validationException.addValidationError("transform source cannot be null");
            }
            if (config.getDestination() == null) {
                validationException.addValidationError("transform destination cannot be null");
            }
        }

        if (validationException.validationErrors().isEmpty()) {
            return Optional.empty();
        } else {
            return Optional.of(validationException);
        }
    }

    @Override
    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
        return config.toXContent(builder, params);
    }

    @Override
    public int hashCode() {
        return Objects.hash(config);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        PutTransformRequest other = (PutTransformRequest) obj;
        return Objects.equals(config, other.config);
    }
}