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

$scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
Set-Location $scriptDir

function Test-EnvVarLine {
    param(
        [Parameter(Mandatory = $true)][string]$FilePath,
        [Parameter(Mandatory = $true)][string]$Name
    )
    if (-not (Test-Path -LiteralPath $FilePath)) {
        return $false
    }
    return [bool](Select-String -Path $FilePath -Pattern ("^\s*" + [regex]::Escape($Name) + "=") -Quiet)
}

if (-not (Get-Command python -ErrorAction SilentlyContinue)) {
    $venvPython = Join-Path $scriptDir ".venv\Scripts\python.exe"
    if (-not (Test-Path -LiteralPath $venvPython)) {
        throw "Python was not found in PATH and .venv\\Scripts\\python.exe is missing. Install Python 3.11+ or create .venv first."
    }
}

$pythonExe = $null
$venvPython = Join-Path $scriptDir ".venv\Scripts\python.exe"
if (Test-Path -LiteralPath $venvPython) {
    $pythonExe = $venvPython
} else {
    $pythonCmd = Get-Command python -ErrorAction SilentlyContinue
    if ($null -eq $pythonCmd) {
        throw "Python was not found in PATH. Install Python 3.11+ or create .venv first."
    }
    $pythonExe = $pythonCmd.Source
}

$envFile = Join-Path $scriptDir ".env"
if (-not (Test-Path -LiteralPath $envFile)) {
    Write-Warning ".env was not found at $envFile. Server startup may fail if required vars are missing."
} else {
    if (-not (Test-EnvVarLine -FilePath $envFile -Name "OPENAI_API_KEY")) {
        Write-Warning ".env is missing OPENAI_API_KEY."
    }
    if (-not (Test-EnvVarLine -FilePath $envFile -Name "SCREENJOB_TOKEN")) {
        Write-Warning ".env is missing SCREENJOB_TOKEN."
    }
}

Write-Host "Starting ScreenJob backend on configured host/port..." -ForegroundColor Cyan
& $pythonExe main.py server