// Package "statistics" provides a way to observer reduction speed during
// execution.
package statistics

import (
	"fmt"
	"strings"
)

// Statistics for a specific reduction.
type Results struct {
	StepsTaken  uint64 // Number of steps taken during execution.
	TimeElapsed uint64 // The time (ms) taken for execution to complete.
}

// Returns the average number of operations per second of the execution.
func (r Results) OpsPerSecond() float32 {
	return float32(r.StepsTaken) / (float32(r.TimeElapsed) / 1000)
}

// Format the results as a string.
func (r Results) String() string {
	builder := strings.Builder{}
	fmt.Fprintln(&builder, "Time Spent:", r.TimeElapsed, "ms")
	fmt.Fprintln(&builder, "Steps:", r.StepsTaken)
	fmt.Fprintln(&builder, "Speed:", r.OpsPerSecond(), "ops")
	return builder.String()
}