# Checks each URL in backlinks_raw.txt for presence of 'biharfuture.com' in page content.
# Outputs CSV to backlink_check_results.csv

$in = "backlinks_raw.txt"
$out = "backlink_check_results.csv"

if (-not (Test-Path $in)) {
    Write-Error "$in not found in current directory"
    exit 1
}

"URL,Status,ContainsLink,Note" | Out-File -FilePath $out -Encoding utf8

Get-Content $in | Where-Object { $_ -and $_.Trim() -ne "" } | ForEach-Object -Parallel {
    param($url, $out)
} -ArgumentList $_, $out -ThrottleLimit 5

# Fallback serial processing (safer across PowerShell versions)
Get-Content $in | Where-Object { $_ -and $_.Trim() -ne "" } | ForEach-Object {
    $url = $_.Trim()
    try {
        $headers = @{ 'User-Agent' = 'Mozilla/5.0 (compatible; Bingbot/2.0; +http://www.bing.com/bingbot.htm)'}
        $resp = Invoke-WebRequest -Uri $url -UseBasicParsing -Headers $headers -TimeoutSec 15 -ErrorAction Stop
        $status = $resp.StatusCode.ToString()
        $body = $resp.Content
        if ($body -match 'biharfuture\.com' -or $body -match 'biharfuture') {
            $contains = 'YES'
            $note = ''
        } else {
            $contains = 'NO'
            $note = ''
        }
    } catch {
        $status = 'ERROR'
        $contains = 'NO'
        $note = $_.Exception.Message -replace '"','""'
    }
    $line = '"' + $url + '",' + $status + ',' + $contains + ',"' + $note + '"'
    $line | Out-File -FilePath $out -Encoding utf8 -Append
    Write-Output $line
}

Write-Output "Results written to $out"