import { IDAMetrics } from './protocol' ; export abstract class Metric { private innerMetrics : number [ ] = [ ] ; private width = 1 ; private maxMetric = 1 ; private lastIncrements = 500 ; /**
     * Index of the most recent metric. Incremented every time new metrics
     * are added.
     */ public index = 0 ; /**
     * Gets the max y value that the chart should be scaled to. Defaults to
     * get the max-higher power of 2.
     */ public get maxY ( ) { let maxY = 10 ** Math . ceil ( Math . log10 ( this . maxMetric ) ) ; if ( maxY > this . maxMetric * 2 ) { maxY /= 2 ; } if ( maxY > this . maxMetric * 2 ) { maxY /= 2 ; } return maxY ; } /**
     * Gets the value at the given index in the data, if it's still retained.
     */ public valueAt ( index ) { return this . innerMetrics [ this . innerMetrics . length - ( this . index - index ) - 1 ] ; } /**
     * Gets the metric data. May not be the complete `width` if not enough data
     * is yet available.
     */ public get metrics ( ) : number [ ] { return this . innerMetrics ; } /**
     * Gets the metric's current value.
     */ public get current ( ) : number { return this . innerMetrics [ this . innerMetrics . length - 1 ] ?? 0 ; } /**
     * Resets the number of metric buckets stored.
     */ public reset ( duration , increments ) { const steps = Math . ceil ( duration / increments ) + 3 ; this . width = steps ; if ( increments !== this . lastIncrements ) { this . maxMetric = 1 ; this . index = 0 ; this . innerMetrics = [ ] ; this . lastIncrements = increments ; } else if ( this . width > this . innerMetrics . length ) { this . innerMetrics = this . innerMetrics . slice ( - this . width ) ; } else { } } /**
     * Gets whether this metric has any data to report.
     */ public hasData ( ) { return ! ! this . innerMetrics . length ; } /**
     * Replaces the data in the metric with the given ones.
     */ public setData ( data ) { this . innerMetrics = data ; this . index = data . length ; this . maxMetric = this . recalcMax ( ) ; } /**
     * Called when new data is read from the debugger.
     */ public abstract update ( timestamp , metrics ) ; /**
     * Returns the formatted string for the metric.
     */ public abstract format ( metric ) ; /**
     * Returns the name of the metric.
     */ public abstract name ( ) ; /**
     * Returns a short label for the metric.
     */ public abstract short ( ) ; /**
     * Adds a new metric to the internal series.
     */ protected push ( _timestamp , metric ) { if ( this . innerMetrics . length === this . width ) { if ( this . innerMetrics . shift ( ) === this . maxMetric && metric < this . maxMetric ) { this . maxMetric = this . recalcMax ( ) ; } } this . maxMetric = Math . max ( this . maxMetric , metric ) ; this . innerMetrics . push ( metric ) ; this . index ++ ; } protected recalcMax ( ) { let max = 1 ; for ( const metric of this . innerMetrics ) { max = Math . max ( max , metric ) ; } return max ; } } /**
 * Metric that calculates its values by recording their change per second.
 */ export abstract class DerivativeMetric extends Metric { private lastTimeStamp = - 1 ; private lastMetric = - 1 ; @override
      public setData ( data ) { super . setData ( data ) ; this . lastTimeStamp = - 1 ; } @override
      protected push ( timestamp , metric ) { const prevTimestamp = this . lastTimeStamp ; const prevMetric = this . lastMetric ; this . lastTimeStamp = timestamp ; this . lastMetric = metric ; if ( this . lastTimeStamp !== - 1 ) { super . push ( timestamp , ( ( metric - prevMetric ) / ( timestamp - prevTimestamp ) ) * 1000 ) ; } } }