package com.onaro.sanscreen.client.view.policy;

import com.netapp.oci.serviceassurance.interfaces.data.PolicyCondition;
import com.netapp.oci.serviceassurance.interfaces.data.ThresholdType;
import com.netapp.sanscreen.server.product.shared.serviceassurance.interfaces.data.PerformanceViolation;
import com.onaro.performance.interfaces.data.MetricType;

/**
 * Immutable class that defines a (non-SAN Path) threshold. It can be
 * thought of as a version of the server's performance PolicyCondition,
 * with server text replaced with client-composed display text.
 */
public final class Threshold {
    
    private final ThresholdType thresholdType;
    private final MetricType metricType;
    private final Double value;

    /**
     * Gets a {@link Threshold} from a performance violation.
     * @param violation a {@link PerformanceViolation}
     * @return
     */
    public static Threshold getFromViolation(PerformanceViolation violation) {
        PolicyCondition condition = violation.getPolicyCondition();
        MetricType metricType = MetricType.valueOf(violation.getObjectType(), condition.getCounterName());
        ThresholdType thresholdType = condition.getThresholdType();
        Double value = condition.getThresholdValue();
        return new Threshold(thresholdType, metricType, value);
    }
    
    /**
     * Creates a {@link Threshold}.
     * @param thresholdType {@link ThresholdType}
     * @param metricType {@link MetricType}
     * @param value
     */
    public Threshold (ThresholdType thresholdType, MetricType metricType, Double value) {
        this.thresholdType = thresholdType;
        this.metricType = metricType;
        this.value = value;
    }
    
    /**
     * Gets the threshold type: MIN or MAX
     * @return the {@link ThresholdType}
     */
    public ThresholdType getThresholdType() {
        return thresholdType;
    }
    
    /**
     * Gets the threshold metric: display name and units (if any)
     * @return the {@link MetricType}
     */
    public MetricType getMetricType() {
        return metricType;
    }
    
    /**
     * Gets the threshold value
     * @return the value
     */
    public Double getValue() {
        return value;
    }
}