<#
.SYNOPSIS
	Pings remote hosts to measure the latency 
.DESCRIPTION
	This PowerShell script measures the ping roundtrip times from the local computer to remote ones (10 Internet servers by default).
.PARAMETER hosts
	Specifies the hosts to ping, seperated by commata (10 Internet servers by default)
.EXAMPLE
	PS> ./ping-internet.ps1
	✅ Internet ping: 12ms (9...18ms range)
.LINK
	https://github.com/fleschutz/PowerShell
.NOTES
	Author: Markus Fleschutz | License: CC0
#>

param([string]$hosts = "bing.com,cnn.com,dropbox.com,github.com,google.com,ibm.com,live.com,meta.com,x.com,youtube.com")

try {
	$hostsArray = $hosts.Split(",")
	$tasks = $hostsArray | foreach { (New-Object Net.NetworkInformation.Ping).SendPingAsync($_,1000) }
	[int]$min = 9999999
	[int]$max = [int]$avg = [int]$success = 0
	[int]$total = $hostsArray.Count
	[Threading.Tasks.Task]::WaitAll($tasks)
	foreach($ping in $tasks.Result) {
		if ($ping.Status -ne "Success") { continue }
		$success++
		[int]$latency = $ping.RoundtripTime
		$avg += $latency
		if ($latency -lt $min) { $min = $latency }
		if ($latency -gt $max) { $max = $latency }
	}
	[int]$loss = $total - $success
	if ($success -eq 0) {
		Write-Host "⚠️ Internet offline (100% ping loss)"
	} elseif ($loss -gt 0) {
		[float]$speed = [math]::round([float]$avg / [float]$success, 1)
		Write-Host "✅ Online with $loss/$total ping loss and $($min)...$($max)ms latency - $($speed)ms average"
	} else {
		[float]$speed = [math]::round([float]$avg / [float]$success, 1)
		Write-Host "✅ Internet ping: $($speed)ms ($min...$($max)ms range)"
	}
	exit 0 # success
} catch {
	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
	exit 1
}
