# Configuration
$ThresholdAlert = 85  # Email alert threshold
$ThresholdRestart = 90  # Restart threshold
$CheckInterval = 60  # Check every 60 seconds
$LogPath = "C:\MemoryMonitor.log"
$SmtpServer = "your.smtp.server.com"
$FromAddress = "alert@yourdomain.com"
$ToAddress = "admin@yourdomain.com"
$SmtpCredential = Get-Credential  # Store credentials securely in production

# Email body template
$EmailSubject = "Memory Alert on $env:COMPUTERNAME"
$EmailBody = @"
Server: $env:COMPUTERNAME
Time: {0}
Memory Usage: {1}%
Status: {2}
"@

function Write-Log {
    param([string]$Message)
    Add-Content -Path $LogPath -Value "$(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') - $Message"
}

try {
    while($true) {
        $MemoryUsage = (Get-Counter '\Memory\% Committed Bytes In Use').CounterSamples.CookedValue
        $MemoryUsage = [math]::Round($MemoryUsage, 2)
        
        if($MemoryUsage -ge $ThresholdRestart) {
            # Log and restart
            $Message = "CRITICAL: Memory at ${MemoryUsage}% - Initiating restart"
            Write-Log $Message
            
            Send-MailMessage -From $FromAddress -To $ToAddress -Subject "$EmailSubject - RESTARTING" `
                -Body ($EmailBody -f (Get-Date), $MemoryUsage, $Message) `
                -SmtpServer $SmtpServer -Credential $SmtpCredential -Priority High
            
            Restart-Computer -Force
            exit
        }
        elseif($MemoryUsage -ge $ThresholdAlert) {
            # Send alert
            $Message = "WARNING: Memory at ${MemoryUsage}%"
            Write-Log $Message
            
            Send-MailMessage -From $FromAddress -To $ToAddress -Subject "$EmailSubject - WARNING" `
                -Body ($EmailBody -f (Get-Date), $MemoryUsage, $Message `
                -SmtpServer $SmtpServer -Credential $SmtpCredential
        }
        
        Start-Sleep -Seconds $CheckInterval
    }
}
catch {
    Write-Log "ERROR: $($_.Exception.Message)"
    exit 1
}