<#
.SYNOPSIS
	Checks the ping latency from the local computer to selected Internet hosts
.DESCRIPTION
	This script checks the ping latency from the local computer to selected Internet hosts.
	The hosts by default are: amazon.com,apple.com,bing.com,cnn.com,dropbox.com,facebook.com,google.com,live.com,twitter.com,youtube.com
.PARAMETER hosts
	Specifies the hosts to check (separated by comma)
.EXAMPLE
	PS> ./check-ping
	✔️ 36 ms ping average (13 ms min, 109 ms max, 10 hosts)
.LINK
	https://github.com/fleschutz/PowerShell
.NOTES
	Author: Markus Fleschutz · License: CC0
#>

param([string]$hosts = "amazon.com,apple.com,bing.com,cnn.com,dropbox.com,facebook.com,google.com,live.com,twitter.com,youtube.com")

try {
	write-progress "Sending pings to $hosts..."
	$HostsArray = $hosts.Split(",")
	$Pings = test-connection -count 1 -computerName $HostsArray

	[int]$Min = 9999999
	[int]$Max = 0
	[int]$Avg = 0
	foreach($Ping in $Pings) {
		if ($IsLinux) {
			[int]$Latency = $Ping.latency
		} else {
			[int]$Latency = $Ping.ResponseTime
		}
		if ($Latency -lt $Min) { $Min = $Latency }
		if ($Latency -gt $Max) { $Max = $Latency }
		$Avg += $Latency
	}
	$Avg = $Avg / $Pings.count

	"✔️ $Avg ms ping average ($Min ms min, $Max ms max, $($Pings.count) hosts)"
	exit 0 # success
} catch {
	"⚠️ Error: $($Error[0]) ($($MyInvocation.MyCommand.Name):$($_.InvocationInfo.ScriptLineNumber))"
	exit 1
}