#Parameters
param(
    [Parameter(Mandatory=$true)]
    [string] $ResourceGroupName,

    [Parameter(Mandatory=$true)]
    [string] $VMName
)

#Azure Authentication
try {
    $AzureConnection = (Connect-AzAccount -Identity).context
}
catch {
    Write-Output "There is no system-assigned user identity. Aborting." 
    exit
}

#Get status of Azure VM
$vm = Get-AzVM -ResourceGroupName $ResourceGroupName -Name $VMName -Status
$powerState = $vm.Statuses | Where-Object { $_.Code -like "PowerState/*" } | Select-Object -ExpandProperty DisplayStatus

#Start Azure VM
if ($powerState -eq "VM stopped" -or $powerState -eq "VM deallocated") {
    Write-Output "Starting VM '$VMName'..."
    Start-AzVM -ResourceGroupName $ResourceGroupName -Name $VMName
}
else {
    Write-Output "VM '$VMName' is already running or in transition. No action taken."
}