name: Clean up Forgejo Container Registry

on:
  schedule:
    - cron: '0 0 * * 0' # Runs every Sunday at midnight
  workflow_dispatch: # Allows manual triggering

jobs:
  delete-old-images:
    runs-on: almalinux-10
    steps:
      - name: Delete old versions
        run: |
          REGISTRY="forge.pc-rytteren.dk"
          OWNER="${{ github.repository_owner }}"
          IMAGE="my-ostree-os"
          MIN_KEEP=50
          TOKEN="${{ secrets.PACKAGE_TOKEN }}"

          # Fetch all container packages with this name, sorted oldest first (by id)
          # API returns a list of package objects, each with "id" and "version"
          RAW=$(curl -s -H "Authorization: token ${TOKEN}" \
            "https://${REGISTRY}/api/v1/packages/${OWNER}?type=container&q=${IMAGE}&limit=200")

          # Filter only packages with the correct name and extract id, sort oldest first
          IDS=$(echo "$RAW" | tr '{' '\n' | grep "\"name\":\"${IMAGE}\"" | \
            sed 's/.*"id":\([0-9]*\).*/\1/' | sort -n)

          TOTAL=$(echo "$IDS" | grep -c '[0-9]' || true)
          echo "Found ${TOTAL} packages total, keeping ${MIN_KEEP}"

          if [ "$TOTAL" -le "$MIN_KEEP" ]; then
            echo "No packages to delete"
            exit 0
          fi

          # Delete the oldest (lowest ids) beyond MIN_KEEP
          TO_DELETE=$(echo "$IDS" | head -n $(( TOTAL - MIN_KEEP )))
          for ID in $TO_DELETE; do
            echo "Deleting package id: ${ID}"
            curl -s -X DELETE -H "Authorization: token ${TOKEN}" \
              "https://${REGISTRY}/api/v1/packages/${OWNER}/${ID}"
          done