[System.Uri]$url = 'https://ateam01serversizes.azurewebsites.net/api/sizes/location/east/connectiontype/ams'
$fqdn = $url.Host
$port = '443'

if (-not (Test-NetConnection -ComputerName $fqdn -Port $port -WarningAction 'SilentlyContinue' -ErrorAction 'Stop').TcpTestSucceeded) {
    throw "Missing access to $fqdn on tcp port $port. Stop"
}

try {
    Invoke-WebRequest -Uri $url -OutFile $jsonFile -UseBasicParsing
} 
catch {
    $webClient = New-Object -TypeName 'System.Net.WebClient'
    $webClient.DownloadFile($url, $jsonFile)
    $webClient.Dispose()
}

if (-not (Test-Path -Path $jsonFile)) {
    throw "The file $jsonFile does not exist. Stop"
}

$jsonContent = ConvertFrom-Json -InputObject (Get-Content -Path $jsonFile)
#$jsonContent.sizes

try {
    $null = Connect-VIServer -Server $VCenter -User $VCUsername -Password $VCUserPassword -ErrorAction 'Stop'
} 
catch {
    throw "Could not connect to VMware vCenter $VCenter. Stop"
}