run_ui.ps1

$ErrorActionPreference = "Stop"

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

function Resolve-Python {
    $pythonCandidates = @(
        (Join-Path $root ".venv\Scripts\python.exe"),
        "python3",
        "python",
        "py"
    )

    foreach ($candidate in $pythonCandidates) {
        if ($candidate -like "*.exe") {
            if (-not (Test-Path $candidate)) {
                continue
            }
            $pythonCmd = $candidate
        }
        else {
            if (-not (Get-Command $candidate -ErrorAction SilentlyContinue)) {
                continue
            }
            $pythonCmd = $candidate
        }

        try {
            & $pythonCmd --version *> $null
            if ($LASTEXITCODE -eq 0) {
                return $pythonCmd
            }
        }
        catch {
            continue
        }
    }

    return $null
}

$pythonCmd = Resolve-Python
if (-not $pythonCmd) {
    throw "Python was not found. Create .venv or install Python and add it to PATH."
}

Write-Host "Launching VideoToScreensaver UI..." -ForegroundColor Cyan

try {
    & $pythonCmd "src\app.py"
}
catch {
    $message = $_.Exception.Message
    if ($message -match "No module named") {
        Write-Host "Missing dependencies. Install them with:" -ForegroundColor Yellow
        Write-Host "  python -m pip install -r requirements.txt" -ForegroundColor Yellow
    }
    throw
}