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/*
 * 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.common.requests;

import java.nio.ByteBuffer;
import java.util.Map;
import java.util.stream.Collectors;
import org.apache.kafka.common.message.UpdateFeaturesResponseData;
import org.apache.kafka.common.message.UpdateFeaturesResponseData.UpdatableFeatureResult;
import org.apache.kafka.common.message.UpdateFeaturesResponseData.UpdatableFeatureResultCollection;
import org.apache.kafka.common.protocol.ApiKeys;
import org.apache.kafka.common.protocol.Errors;
import org.apache.kafka.common.protocol.types.Struct;


/**
 * Possible error codes:
 *
 *   - {@link Errors#CLUSTER_AUTHORIZATION_FAILED}
 *   - {@link Errors#NOT_CONTROLLER}
 *   - {@link Errors#INVALID_REQUEST}
 *   - {@link Errors#FEATURE_UPDATE_FAILED}
 */
public class UpdateFeaturesResponse extends AbstractResponse {

    private final UpdateFeaturesResponseData data;

    public UpdateFeaturesResponse(UpdateFeaturesResponseData data) {
        this.data = data;
    }

    public UpdateFeaturesResponse(Struct struct) {
        final short latestVersion = (short) (UpdateFeaturesResponseData.SCHEMAS.length - 1);
        this.data = new UpdateFeaturesResponseData(struct, latestVersion);
    }

    public UpdateFeaturesResponse(Struct struct, short version) {
        this.data = new UpdateFeaturesResponseData(struct, version);
    }

    public Map errors() {
        return data.results().valuesSet().stream().collect(
            Collectors.toMap(
                result -> result.feature(),
                result -> new ApiError(Errors.forCode(result.errorCode()), result.errorMessage())));
    }

    @Override
    public Map errorCounts() {
        return apiErrorCounts(errors());
    }

    @Override
    public int throttleTimeMs() {
        return data.throttleTimeMs();
    }

    @Override
    protected Struct toStruct(short version) {
        return data.toStruct(version);
    }

    @Override
    public String toString() {
        return data.toString();
    }

    public UpdateFeaturesResponseData data() {
        return data;
    }

    public static UpdateFeaturesResponse parse(ByteBuffer buffer, short version) {
        return new UpdateFeaturesResponse(ApiKeys.UPDATE_FEATURES.parseResponse(version, buffer), version);
    }

    public static UpdateFeaturesResponse createWithErrors(ApiError topLevelError, Map updateErrors, int throttleTimeMs) {
        final UpdatableFeatureResultCollection results = new UpdatableFeatureResultCollection();
        for (final Map.Entry updateError : updateErrors.entrySet()) {
            final String feature = updateError.getKey();
            final ApiError error = updateError.getValue();
            final UpdatableFeatureResult result = new UpdatableFeatureResult();
            result.setFeature(feature)
                .setErrorCode(error.error().code())
                .setErrorMessage(error.message());
            results.add(result);
        }
        final UpdateFeaturesResponseData responseData = new UpdateFeaturesResponseData()
            .setThrottleTimeMs(throttleTimeMs)
            .setErrorCode(topLevelError.error().code())
            .setErrorMessage(topLevelError.message())
            .setResults(results)
            .setThrottleTimeMs(throttleTimeMs);
        return new UpdateFeaturesResponse(responseData);
    }
}