# Parses every .ps1 in the repository and reports syntax errors.
#
# Why this exists: most of this project's PowerShell was written on a Mac, where
# no parser is available. "It looks right" is not a check — a single stray
# character stops the Windows installer from running at all, and there is no way
# to find that out except on Windows.
#
# Run from the repository root:
#     powershell -ExecutionPolicy Bypass -File portable\advanced\Check-PowerShell.ps1
#
# Exit code is the number of files with errors, so CI can use it too.

$ErrorActionPreference = 'Stop'
$root = Split-Path -Parent (Split-Path -Parent $PSScriptRoot)
$failed = 0
$checked = 0

Write-Host ""
Write-Host "  Parsing every .ps1 under $root" -ForegroundColor Cyan
Write-Host ""

Get-ChildItem -Path $root -Recurse -Filter *.ps1 -File |
    Where-Object { $_.FullName -notmatch '\\node_modules\\|\\app\\|\\\.git\\' } |
    Sort-Object FullName |
    ForEach-Object {
        $checked++
        $errors = $null
        $relative = $_.FullName.Substring($root.Length).TrimStart('\')
        [void][System.Management.Automation.Language.Parser]::ParseFile($_.FullName, [ref]$null, [ref]$errors)

        if ($errors -and $errors.Count -gt 0) {
            $failed++
            Write-Host ("  FAIL  " + $relative) -ForegroundColor Red
            foreach ($e in $errors) {
                $line = $e.Extent.StartLineNumber
                Write-Host ("        line " + $line + ": " + $e.Message) -ForegroundColor Red
            }
        } else {
            Write-Host ("  ok    " + $relative) -ForegroundColor Green
        }
    }

Write-Host ""
if ($failed -eq 0) {
    Write-Host "  $checked file(s) parsed, no syntax errors." -ForegroundColor Green
} else {
    Write-Host "  $failed of $checked file(s) have syntax errors." -ForegroundColor Red
    Write-Host "  Send the red lines above to whoever wrote them." -ForegroundColor Yellow
}
Write-Host ""

exit $failed