[CmdletBinding()]
param()

$ErrorActionPreference = 'Stop'
$WorkDir = [IO.Path]::GetFullPath($PSScriptRoot)
$Python = (Get-Command python.exe -ErrorAction Stop).Source
$Script = Join-Path $WorkDir 'RenderSharpMesherCaptures.py'
$Stdout = Join-Path $WorkDir 'render.stdout.log'
$Stderr = Join-Path $WorkDir 'render.stderr.log'
$Runner = Get-Process -Id $PID
$Runner.PriorityClass = 'BelowNormal'
$Runner.ProcessorAffinity = [IntPtr]0xFF00

$Info = [Diagnostics.ProcessStartInfo]::new()
$Info.FileName = $Python
$Info.Arguments = ('"{0}"' -f $Script)
$Info.WorkingDirectory = $WorkDir
$Info.UseShellExecute = $false
$Info.CreateNoWindow = $true
$Info.RedirectStandardOutput = $true
$Info.RedirectStandardError = $true
$Process = [Diagnostics.Process]::new()
$Process.StartInfo = $Info
if (-not $Process.Start()) { throw 'Could not start capture renderer.' }
$Process.PriorityClass = [Diagnostics.ProcessPriorityClass]::BelowNormal
$Process.ProcessorAffinity = [IntPtr]0xFF00
$StartAt = [DateTime]::UtcNow
$OutputTask = $Process.StandardOutput.ReadToEndAsync()
$ErrorTask = $Process.StandardError.ReadToEndAsync()
$TimedOut = $false
$OverMemory = $false
$EightGB = 8L * 1024L * 1024L * 1024L
while (-not $Process.HasExited) {
    $Process.Refresh()
    if ($Process.PrivateMemorySize64 -ge $EightGB) { $OverMemory = $true; break }
    if (([DateTime]::UtcNow - $StartAt).TotalSeconds -ge 900) { $TimedOut = $true; break }
    Start-Sleep -Milliseconds 250
}
if ($TimedOut -or $OverMemory) { try { $Process.Kill() } catch {} }
$Process.WaitForExit()
$RenderStdout = $OutputTask.GetAwaiter().GetResult()
$RenderStderr = $ErrorTask.GetAwaiter().GetResult()
[IO.File]::WriteAllText($Stdout, $RenderStdout)
[IO.File]::WriteAllText($Stderr, $RenderStderr)
if ($TimedOut) { throw "Capture rendering exceeded 15 minutes. Logs: $Stdout / $Stderr" }
if ($OverMemory) { throw "Capture renderer reached the 8 GB private-memory cap. Logs: $Stdout / $Stderr" }
if ($Process.ExitCode -ne 0) {
    Write-Output "Capture rendering failed exit_code=$($Process.ExitCode) stdout=$Stdout stderr=$Stderr"
    if ($RenderStdout) { Write-Output $RenderStdout }
    if ($RenderStderr) { Write-Output $RenderStderr }
    throw 'Matched capture rendering failed.'
}
Write-Output "Capture render passed elapsed_seconds=$([Math]::Round(([DateTime]::UtcNow - $StartAt).TotalSeconds,2)) priority=BelowNormal affinity=0xFF00 stdout=$Stdout stderr=$Stderr"