param(
    [string]$BuildType = "roam"  # roam or web
)

# -----------------------------
# CONFIG
# -----------------------------

$EmacsPath = "emacs"  # or full path if needed
$LogDir = "$HOME/logs"
$Timestamp = (Get-Date).ToString("o")

if ($BuildType -eq "roam") {
    $ElispFile = "$HOME/master-folder/org_files/org_roam/lisp/build.el"
    $LogFile = "$LogDir/org-roam-resource.log"
}
elseif ($BuildType -eq "web") {
    $ElispFile = "$HOME/master-folder/org_files/org_web/build-site.el"
    $LogFile = "$LogDir/org-web-resource.log"
}
else {
    Write-Host "Unknown build type"
    exit 1
}

# -----------------------------
# START TIMER
# -----------------------------

$startTime = Get-Date

# Start Emacs process
$process = Start-Process `
    -FilePath $EmacsPath `
    -ArgumentList "--batch -l `"$ElispFile`"" `
    -PassThru

# -----------------------------
# RESOURCE TRACKING LOOP
# -----------------------------

$cpuSamples = @()
$memSamples = @()

while (-not $process.HasExited) {
    try {
        $p = Get-Process -Id $process.Id -ErrorAction Stop
        $cpuSamples += $p.CPU
        $memSamples += $p.WorkingSet64
    } catch {}
    Start-Sleep -Milliseconds 500
}

$endTime = Get-Date
$duration = ($endTime - $startTime).TotalSeconds

# -----------------------------
# METRICS
# -----------------------------

$peakMemoryMB = [math]::Round(($memSamples | Measure-Object -Maximum).Maximum / 1MB, 2)
$avgMemoryMB  = [math]::Round((($memSamples | Measure-Object -Average).Average) / 1MB, 2)
$totalCpu     = ($cpuSamples | Measure-Object -Maximum).Maximum

# -----------------------------
# OUTPUT JSON
# -----------------------------

$result = @{
    buildType     = $BuildType
    timestamp     = $Timestamp
    durationSec   = [math]::Round($duration, 2)
    peakMemoryMB  = $peakMemoryMB
    avgMemoryMB   = $avgMemoryMB
    cpuTime       = $totalCpu
    status        = if ($process.ExitCode -eq 0) { "success" } else { "failure" }
}

$result | ConvertTo-Json | Out-File -FilePath $LogFile -Append

Write-Host "Build complete."
Write-Host "Duration: $duration seconds"
Write-Host "Peak Memory: $peakMemoryMB MB"