<#
.SYNOPSIS
	Checks the ping latency from the local computer to selected Internet hosts
.DESCRIPTION
	This PowerShell script checks the ping latency from the local computer to selected Internet hosts.
	The hosts by default are: amazon.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
	✔️ Average ping is 36ms average (13ms min, 109ms max)
.LINK
	https://github.com/fleschutz/PowerShell
.NOTES
	Author: Markus Fleschutz / License: CC0
#>

param([string]$hosts = "amazon.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

	& "$PSScriptRoot/give-reply.ps1" "$($Avg)ms average ping time ($($Min)ms min, $($Max)ms max)"
	exit 0 # success
} catch {
	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
	exit 1
}