$src = Resolve-Path "$PSScriptRoot\..\..\docs\Notes"
$dst = "$PSScriptRoot\wwwroot\docs\notes"
if (Test-Path $dst) { Remove-Item "$dst\*" -Force -ErrorAction SilentlyContinue }
New-Item -ItemType Directory -Path $dst -Force | Out-Null

$entries = @()
Get-ChildItem -Path $src -Filter "*.md" | ForEach-Object {
    $base = $_.BaseName
    $slug = $base.ToLowerInvariant()
    $slug = $slug -replace "'", ""
    $slug = $slug -replace "\.", ""
    $slug = $slug -replace "[^a-z0-9 -]", ""
    $slug = $slug -replace "\s+", "-"
    $slug = $slug -replace "-+", "-"
    $slug = $slug.Trim('-')

    Copy-Item $_.FullName (Join-Path $dst "$slug.md")

    $category = $null
    $content = Get-Content $_.FullName -Raw
    if ($content -match '(?s)^---\s*\n(.*?)\n---') {
        $frontmatter = $Matches[1]
        if ($frontmatter -match '(?m)^category:\s*(.+)$') {
            $category = $Matches[1].Trim().Trim('"')
        }
    }

    $entry = @{ slug = $slug; title = $base }
    if ($category) { $entry.category = $category }
    $entries += $entry
}

$indexPath = "$PSScriptRoot\wwwroot\docs\notes-index.json"
$index = @{ notes = $entries } | ConvertTo-Json
Set-Content -Path $indexPath -Value $index -Encoding UTF8