/*
 * 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.kylin.rest.response;

import java.util.List;
import java.util.Map;

import org.apache.kylin.metadata.model.ComputedColumnDesc;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import lombok.Data;

@Data
public class ComputedColumnUsageResponse {

    @JsonProperty("usages")
    private Map<String, Usage> usageMap = Maps.newHashMap();

    public void addUsage(ComputedColumnDesc computedColumnDesc, String usedByModel) {
        Usage usage = new Usage();
        usage.setDesc(computedColumnDesc);
        if (!usageMap.containsKey(computedColumnDesc.getFullName())) {
            usageMap.put(computedColumnDesc.getFullName(), usage);
        }
        usageMap.get(computedColumnDesc.getFullName()).getModels().add(usedByModel);
    }

    @Data
    public class Usage {
        @JsonProperty("cc_desc")
        private ComputedColumnDesc desc;

        @JsonProperty("used_by_models")
        private List<String> models = Lists.newArrayList();
    }
}
