name: Sync public mirror

on:
  push:
    branches: [ main ]

jobs:
  sync:
    runs-on: ubuntu-latest

    steps:
      - name: Install tools (rsync)
        run: |
          sudo apt-get update && sudo apt-get install -y rsync

      - name: Checkout private repo
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Prepare SSH
        env:
          SSH_KEY: ${{ secrets.PUBLIC_REPO_SSH_KEY }}
        run: |
          set -euo pipefail
          mkdir -p ~/.ssh
          echo "$SSH_KEY" > ~/.ssh/id_sync
          chmod 600 ~/.ssh/id_sync
          printf 'Host 192.168.1.15\n  HostName 192.168.1.15\n  Port 22\n  User git\n  IdentityFile ~/.ssh/id_sync\n  IdentitiesOnly yes\n' >> ~/.ssh/config
          ssh-keyscan -p 22 192.168.1.15 >> ~/.ssh/known_hosts

      - name: Clone public repo
        run: |
          git clone --depth 1 ssh://git@192.168.1.15:22/Bausager/Flux-oss.git /tmp/public

      - name: Sync files using .gitea/workflows/oss-keep.txt
        run: |
          set -euo pipefail

          KEEP_FILE=".gitea/workflows/oss-keep.txt"
          INCLUDE_FILE="$(pwd)/.oss-include.rsync"

          echo "Generating rsync include list from $KEEP_FILE"
          : > "$INCLUDE_FILE"
          echo "## Generated from $KEEP_FILE" >> "$INCLUDE_FILE"
          echo "+ */" >> "$INCLUDE_FILE"

          while IFS= read -r line; do
            line="${line%%#*}"
            line="$(echo "$line" | xargs || true)"
            [ -z "$line" ] && continue
            case "$line" in
              !*)
                pat="${line#!}"
                echo "- $pat" >> "$INCLUDE_FILE"
                ;;
              *)
                echo "+ $line" >> "$INCLUDE_FILE"
                ;;
            esac
          done < "$KEEP_FILE"

          echo "- *" >> "$INCLUDE_FILE"
          echo "Rsync include rules:"
          cat "$INCLUDE_FILE"

          echo "Syncing files to /tmp/public"
          rsync -a --delete --prune-empty-dirs \
            --exclude '.git/' \
            --include-from="$INCLUDE_FILE" \
            ./ /tmp/public/

          cd /tmp/public
          git config user.name "Gitea CI"
          git config user.email "ci@bausager.org"

          git add -A
          if git diff --cached --quiet; then
            echo "✅ No public-eligible changes to push."
          else
            echo "🚀 Pushing filtered subset to Flux-oss..."
            git commit -m "Sync public subset from Flux (private)"
            git push origin HEAD:main
          fi