<#
.SYNOPSIS
    Liest spezifische Confluence-Seiten per API
#>

$ConfluenceUrl = "https://arija-confluence.jaas.service.deutschebahn.com"
$ApiBase = "$ConfluenceUrl/rest/api"
$OutputDir = "project-audit\data\confluence-ttsi"

$PageIds = @(
    @{ id = "424295009"; name = "TAF-TAP-TSI-Programmakte" }
    @{ id = "428930895"; name = "TAF-TAP-TSI-Programmsteuerung" }
    @{ id = "490596078"; name = "TAF-TAP-TSI-Fachliche-Dokumentation" }
)

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

Write-Host "============================================================"
Write-Host "  Confluence TTSI-Space Seiten lesen"
Write-Host "============================================================"

$PAT = Read-Host "Confluence PAT"
$Headers = @{ "Authorization" = "Bearer $PAT" }

New-Item -ItemType Directory -Path $OutputDir -Force | Out-Null

Add-Type -AssemblyName System.Web -ErrorAction SilentlyContinue

function Convert-HtmlToText($html) {
    if ($null -eq $html) { return "" }
    $text = $html -replace '<br\s*/?>', "`n"
    $text = $text -replace '<p[^>]*>', "`n"
    $text = $text -replace '</p>', ""
    $text = $text -replace '<li[^>]*>', "`n- "
    $text = $text -replace '<h[1-6][^>]*>', "`n## "
    $text = $text -replace '</h[1-6]>', "`n"
    $text = $text -replace '<tr[^>]*>', "`n| "
    $text = $text -replace '<td[^>]*>', " | "
    $text = $text -replace '<th[^>]*>', " | "
    $text = $text -replace '<[^>]+>', ''
    try { $text = [System.Web.HttpUtility]::HtmlDecode($text) } catch {}
    return $text.Trim()
}

foreach ($Page in $PageIds) {
    $PageId = $Page.id
    $PName = $Page.name
    Write-Host ""
    Write-Host ">> $PName (ID: $PageId)" -ForegroundColor Yellow

    $Uri = "$ApiBase/content/$PageId`?expand=body.storage,version,space,children.page"
    try {
        $Resp = Invoke-WebRequest -Uri $Uri -Headers $Headers -UseBasicParsing -ErrorAction Stop
        $Data = $Resp.Content | ConvertFrom-Json
        Write-Host "  Titel: $($Data.title) (v$($Data.version.number))" -ForegroundColor Green

        # HTML speichern
        $HtmlContent = ""
        if ($Data.body -and $Data.body.storage) { $HtmlContent = $Data.body.storage.value }
        $HtmlContent | Out-File "$OutputDir\$PName.html" -Encoding UTF8

        # Markdown speichern
        $TextContent = Convert-HtmlToText $HtmlContent
        $MdContent = "# $($Data.title)`n`n> Page ID: $PageId | Version: $($Data.version.number) | Space: $($Data.space.key)`n`n---`n`n$TextContent"
        $MdContent | Out-File "$OutputDir\$PName.md" -Encoding UTF8

        Write-Host "  Gespeichert ($($HtmlContent.Length) Zeichen)"

        # Kindseiten auflisten
        if ($Data.children -and $Data.children.page -and $Data.children.page.results) {
            Write-Host "  Kindseiten:" -ForegroundColor DarkGray
            foreach ($Child in $Data.children.page.results) {
                Write-Host "    - $($Child.title) (ID: $($Child.id))"
            }

            # Kindseiten auch lesen
            foreach ($Child in $Data.children.page.results) {
                Write-Host "  >> Kindseite: $($Child.title)..." -NoNewline
                $ChildUri = "$ApiBase/content/$($Child.id)`?expand=body.storage,version"
                try {
                    $CResp = Invoke-WebRequest -Uri $ChildUri -Headers $Headers -UseBasicParsing -ErrorAction Stop
                    $CData = $CResp.Content | ConvertFrom-Json
                    $CHtml = ""
                    if ($CData.body -and $CData.body.storage) { $CHtml = $CData.body.storage.value }
                    $CText = Convert-HtmlToText $CHtml
                    $SafeTitle = $Child.title -replace '[\\/:*?"<>|]', '_'
                    if ($SafeTitle.Length -gt 60) { $SafeTitle = $SafeTitle.Substring(0, 60) }
                    $CMd = "# $($Child.title)`n`n> Page ID: $($Child.id) | Parent: $PName`n`n---`n`n$CText"
                    $CMd | Out-File "$OutputDir\$PName`_$SafeTitle.md" -Encoding UTF8
                    $CHtml | Out-File "$OutputDir\$PName`_$SafeTitle.html" -Encoding UTF8
                    Write-Host " OK" -ForegroundColor Green
                } catch {
                    Write-Host " FEHLER" -ForegroundColor Red
                }
            }
        }
    } catch {
        Write-Host "  FEHLER: $($_.Exception.Message)" -ForegroundColor Red
    }
}

Write-Host ""
Write-Host "============================================================" -ForegroundColor Green
Write-Host "  FERTIG! Ergebnisse in $OutputDir" -ForegroundColor Green
Write-Host "============================================================" -ForegroundColor Green