<#
.SYNOPSIS
  Ermittelt das nächste offene Ticket aus Forgejo (via status:todo Label).
.DESCRIPTION
  Sortierung: priority:high (0) → normal (1) → priority:low (2), dann Issue-Nummer aufsteigend.
  Gibt Nummer, Typ-Label, Titel und Order (= Issue-Nummer) aus.
.PARAMETER IssueNumber
  Optional: Direkt eine Issue-Nummer abfragen statt automatischer Suche.
#>
param([int]$IssueNumber)

$forgejoBase = "https://git.bollwerk.online/api/v1"
$repo        = "bollwerkadmin/bollwerk"
$tokenFile   = Join-Path $PSScriptRoot "forgejo-token.txt"
$token       = (Get-Content $tokenFile -Raw -ErrorAction Stop).Trim()
$headers     = @{ Authorization = "token $token" }

function Get-IssueType($labelNames) {
    if ($labelNames -contains "block-planning") { "[B]" }
    elseif ($labelNames -contains "migration")     { "[M]" }
    elseif ($labelNames -contains "feature")       { "[F]" }
    elseif ($labelNames -contains "refactoring")   { "[F]" }
    elseif ($labelNames -contains "tech-decision") { "[T]" }
    elseif ($labelNames -contains "infrastructure") { "[I]" }
    elseif ($labelNames -contains "planning")      { "[P]" }
    elseif ($labelNames -contains "test")          { "[X]" }
    else { "[?]" }
}

if ($IssueNumber -gt 0) {
    # Variante A: Explizite Issue-Nummer → Forgejo REST API
    $url  = "$forgejoBase/repos/$repo/issues/$IssueNumber"
    $issue = (Invoke-WebRequest -Uri $url -Headers $headers -UseBasicParsing).Content | ConvertFrom-Json
    $labelNames = $issue.labels | ForEach-Object { $_.name }
    $type = Get-IssueType $labelNames
    Write-Host "#$($issue.number) $type $($issue.title)"
}
else {
    # Variante B: Nächstes Ticket per Forgejo-Label status:todo
    $url    = "$forgejoBase/repos/$repo/issues?state=open&type=issues&labels=status%3Atodo&limit=50&sort=oldest"
    $issues = (Invoke-WebRequest -Uri $url -Headers $headers -UseBasicParsing).Content | ConvertFrom-Json
    if ($null -eq $issues -or $issues.Count -eq 0) {
        Write-Host "Keine offenen Tickets mit 'status:todo' gefunden."
        return
    }
    $todos = $issues | ForEach-Object {
        $labelNames = $_.labels | ForEach-Object { $_.name }
        $prio = if ($labelNames -contains "priority:high") { 0 }
                elseif ($labelNames -contains "priority:low")  { 2 }
                else { 1 }
        $type = Get-IssueType $labelNames
        [PSCustomObject]@{
            Number = $_.number
            Title  = $_.title
            Order  = $_.number   # Issue-Nummer als Tiebreaker (aufsteigend = älteste zuerst)
            Prio   = $prio
            Type   = $type
        }
    } | Sort-Object Prio, Order | Select-Object -First 1

    if ($todos) {
        Write-Host "#$($todos.Number) $($todos.Type) $($todos.Title) (Order: $($todos.Order))"
    }
    else {
        Write-Host "Keine offenen Tickets gefunden."
    }
}