param(
    [Parameter(Mandatory=$true)][string]$Executable,
    [Parameter(Mandatory=$true)][string]$OutputDirectory,
    [ValidateSet(8,24,72)][int]$Hours = 72,
    [ValidateRange(1,3600)][int]$SampleSeconds = 60
)
$ErrorActionPreference = 'Stop'
$exe = (Resolve-Path $Executable).Path
$directory = [IO.Path]::GetFullPath($OutputDirectory)
if (Test-Path $directory) { throw 'Use a new output directory; endurance evidence is never overwritten.' }
[IO.Directory]::CreateDirectory($directory) | Out-Null
$utf8 = New-Object Text.UTF8Encoding($false)
$started = [DateTimeOffset]::UtcNow
$info = @{
    StartedAt=$started.ToString('o')
    ExpectedFinish=$started.AddHours($Hours).ToString('o')
    Hours=$Hours
    SampleSeconds=$SampleSeconds
    Executable=$exe
    BinarySha256=(Get-FileHash $exe -Algorithm SHA256).Hash
    SessionId=[Diagnostics.Process]::GetCurrentProcess().SessionId
    OperatingSystem=[Environment]::OSVersion.VersionString
    WritesMessages=$false
}
[IO.File]::WriteAllText("$directory\run-info.json", ($info | ConvertTo-Json), $utf8)
$code = 1
try {
    & $exe endurance --hours $Hours --sample-seconds $SampleSeconds --output "$directory\metrics" |
        ForEach-Object { [IO.File]::AppendAllText("$directory\console.json", $_ + [Environment]::NewLine, $utf8) }
    $code = $LASTEXITCODE
} catch {
    [IO.File]::WriteAllText("$directory\launcher-error.txt", $_.Exception.GetType().FullName, $utf8)
} finally {
    [IO.File]::WriteAllText("$directory\exit-code.txt", [string]$code, $utf8)
    [IO.File]::WriteAllText("$directory\finished-at.txt", [DateTimeOffset]::UtcNow.ToString('o'), $utf8)
}
exit $code