# W7: add <meta name="robots" content="noindex,follow"> to duplicate-canonical pages
$repo = Split-Path -Parent (Split-Path -Parent $PSScriptRoot)
$dupFile = Join-Path $repo 'seo-audit-2026-05-27\gsc\duplicate-canonical.txt'
if (-not (Test-Path $dupFile)) { Write-Host "Missing $dupFile"; exit 1 }
$urls = (Get-Content $dupFile) | Where-Object { $_ -match '^https://' }
Write-Host "Total duplicate-canonical URLs: $($urls.Count)"

function UrlToLocal([string]$url, [string]$repo) {
  $p = $url -replace '^https?://www\.odoo-expertos\.com', ''
  $p = $p.Split('#')[0].Split('?')[0]
  if ($p -eq '' -or $p -eq '/') { return (Join-Path $repo 'index.html') }
  if ($p -match '\.html?$') { return (Join-Path $repo ($p.TrimStart('/').Replace('/','\'))) }
  $p = $p.TrimEnd('/')
  return (Join-Path $repo ($p.TrimStart('/').Replace('/','\') + '\index.html'))
}

$opts = [System.Text.RegularExpressions.RegexOptions]::IgnoreCase
$noindexed = 0
$missing = 0
foreach ($u in $urls) {
  $lf = UrlToLocal $u $repo
  if (-not (Test-Path $lf)) { $missing++; continue }
  $c = [System.IO.File]::ReadAllText($lf)
  if (-not $c) { continue }
  # Check if noindex already present
  if ([regex]::IsMatch($c, 'name="robots"[^>]*noindex', $opts)) { continue }
  # If a <meta name="robots" ...> exists, replace its content; else inject new meta
  $existing = [regex]::Match($c, '<meta\s+name="robots"\s+content="[^"]*"\s*/?>', $opts)
  if ($existing.Success) {
    $repl = '<meta name="robots" content="noindex,follow">'
    $c = $c.Substring(0, $existing.Index) + $repl + $c.Substring($existing.Index + $existing.Length)
  } else {
    # Inject before </head>
    $c = [regex]::Replace($c, '</head>', '<meta name="robots" content="noindex,follow">' + "`r`n</head>", $opts)
  }
  [System.IO.File]::WriteAllText($lf, $c)
  $noindexed++
}
Write-Host "Pages noindexed: $noindexed; missing local: $missing"