[Console]::OutputEncoding = [System.Text.Encoding]::UTF8
$wiki = 'D:\Applications\app\kepano-obsidian-main\wiki'
$vault = 'D:\Applications\app\kepano-obsidian-main'

# Get all available pages in vault
$allMd = Get-ChildItem -Path $vault -Filter '*.md' -File -Recurse
$availablePages = @{}
foreach ($f in $allMd) {
    $bn = $f.BaseName
    $availablePages[$bn] = $true
    # Also register with Chinese characters variations
}

# Scan wiki files for broken links
$brokenLinks = @()
$wikiFiles = Get-ChildItem -Path $wiki -Filter '*.md' -File

foreach ($f in $wikiFiles) {
    $content = [System.IO.File]::ReadAllText($f.FullName)
    # Match [[Link]] or [[Link|Display]]
    $matches = [regex]::Matches($content, '\[\[([^\]|]+)(?:\|[^\]]+)?\]\]')
    foreach ($m in $matches) {
        $linkTarget = $m.Groups[1].Value.Trim()
        # Skip anchors and external links
        if ($linkTarget -match '^http' -or $linkTarget -match '^#') { continue }
        
        if (-not $availablePages.ContainsKey($linkTarget)) {
            $brokenLinks += [PSCustomObject]@{
                File = $f.Name
                BrokenLink = $linkTarget
            }
        }
    }
}

if ($brokenLinks.Count -eq 0) {
    Write-Output "BROKEN_LINKS: 0"
} else {
    Write-Output "BROKEN_LINKS: $($brokenLinks.Count)"
    $brokenLinks | ForEach-Object { Write-Output "$($_.File) -> [[$($_.BrokenLink)]]" }
}