# Legacy Windows compatibility only.
# NSSM supervises the single Python scheduler process; this script never creates
# Windows Task Scheduler entries and does not own business schedule rules.
param(
    [string]$ProjectRoot = (Resolve-Path (Join-Path $PSScriptRoot "..\..")).Path,
    [string]$DataRoot = "",
    [string]$ServiceName = "gyxx-flow-scheduler",
    [string]$NssmPath = "nssm.exe"
)

$ErrorActionPreference = "Stop"
Set-StrictMode -Version Latest

$project = (Resolve-Path -LiteralPath $ProjectRoot).Path
if ([string]::IsNullOrWhiteSpace($DataRoot)) {
    $DataRoot = Join-Path $project "var"
}
$data = [IO.Path]::GetFullPath($DataRoot)
$python = Join-Path $project ".venv\Scripts\python.exe"
if (-not (Test-Path -LiteralPath $python -PathType Leaf)) {
    throw "Python environment not found: $python"
}
$nssm = (Get-Command $NssmPath -ErrorAction Stop).Source
$serviceLogRoot = Join-Path $data "logs\scheduler-service"
New-Item -ItemType Directory -Path $serviceLogRoot -Force | Out-Null

function Invoke-Nssm([string[]]$Arguments) {
    & $nssm @Arguments
    if ($LASTEXITCODE -ne 0) {
        throw "NSSM failed with exit code $LASTEXITCODE"
    }
}

Invoke-Nssm -Arguments @("install", $ServiceName, $python)
Invoke-Nssm -Arguments @("set", $ServiceName, "AppDirectory", $project)
Invoke-Nssm -Arguments @("set", $ServiceName, "AppParameters", "-m gyxx_flow schedule run")
Invoke-Nssm -Arguments @(
    "set", $ServiceName, "AppEnvironmentExtra",
    "GYXX_PROJECT_ROOT=$project", "GYXX_DATA_ROOT=$data", "PYTHONUTF8=1"
)
Invoke-Nssm -Arguments @("set", $ServiceName, "AppStdout", (Join-Path $serviceLogRoot "service.log"))
Invoke-Nssm -Arguments @("set", $ServiceName, "AppStderr", (Join-Path $serviceLogRoot "service-error.log"))
Invoke-Nssm -Arguments @("set", $ServiceName, "AppRotateFiles", "1")
Invoke-Nssm -Arguments @("set", $ServiceName, "AppRotateBytes", "10485760")
Invoke-Nssm -Arguments @("set", $ServiceName, "AppExit", "Default", "Restart")
Invoke-Nssm -Arguments @("set", $ServiceName, "Start", "SERVICE_AUTO_START")

Write-Host "Service installed: $ServiceName"
Write-Host "Before starting it, set the Log On account and production environment as documented."
Write-Host "Start with: nssm start $ServiceName"