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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 com.alipay.lookout.core;

import com.alipay.lookout.api.*;
import com.alipay.lookout.api.composite.MixinMetric;
import com.alipay.lookout.core.common.MeasurementUtil;

import static com.alipay.lookout.common.LookoutConstants.DOT;

/**
 * a mixinMetric contains a lots of basic metrics
 * 
 * all component metrics share the same Id;
 * 
 * Created by [email protected] on 2017/1/26.
 */
final class DefaultMixinMetric implements MixinMetric {
    private final Id       id;
    private final Registry registry; //inner registry

    public DefaultMixinMetric(Id id, AbstractRegistry registry) {
        this.id = id;
        this.registry = registry;
    }

    @Override
    public Id id() {
        return id;
    }

    @Override
    public Counter counter(String componentCounterName) {
        return registry.counter(registry.createId(componentCounterName));
    }

    @Override
    public Timer timer(String componentTimerName) {
        return registry.timer(registry.createId(componentTimerName));
    }

    @Override
    public DistributionSummary distributionSummary(String componentDistributionSummaryName) {
        return registry.distributionSummary(registry.createId(componentDistributionSummaryName));
    }

    @Override
    public  Gauge gauge(final String componentGaugeName,
                                             final Gauge componentGauge) {
        return registry.gauge(registry.createId(componentGaugeName), componentGauge);
    }

    @Override
    public Indicator measure() {
        Indicator indicator = new Indicator(registry.clock().wallTime(), id);
        for (Metric metricEntry : registry) {
            Indicator tmp = metricEntry.measure();
            for (Object measureObj : tmp.measurements()) {
                Measurement measure = (Measurement) measureObj;
                //add componentName to measureName;
                String measureName = measure.name();
                if (!MeasurementUtil.isEmptyMeasureName(measureName)) {
                    measureName = metricEntry.id().name() + DOT + measureName;
                } else {
                    measureName = metricEntry.id().name();
                }
                indicator.addMeasurement(new Measurement(measureName, measure.value()));
            }
        }
        return indicator;
    }

}