name: Sync to Hugging Face Space (force-by-default)

on:
  push:
    branches: ["main", "master"]
  # Optional manual trigger
  workflow_dispatch: {}

jobs:
  sync-to-hub:
    runs-on: ubuntu-latest
    concurrency:
      group: hf-space-sync-canonical
      cancel-in-progress: false

    # Set these as Repository Variables:
    #   Settings → Secrets and variables → Actions → Variables
    #   HF_USERNAME = your HF username (e.g. ruslanmv)
    #   SPACE_NAME  = your Space name (e.g. matrix-ai)
    env:
      HF_USERNAME: ${{ vars.HF_USERNAME }}
      SPACE_NAME:  ${{ vars.SPACE_NAME }}

    steps:
      - name: Checkout (with LFS)
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          lfs: true

      - name: Prepare Git + LFS
        run: |
          git config user.name  "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git lfs install --local

      - name: Force push GitHub HEAD → Space main (GitHub is canonical)
        env:
          # Add this as a Repository Secret:
          # Settings → Secrets and variables → Actions → New repository secret → HF_TOKEN
          HF_TOKEN: ${{ secrets.HF_TOKEN }}
        run: |
          set -e
          if [ -z "$HF_USERNAME" ] || [ -z "$SPACE_NAME" ]; then
            echo "❌ Missing HF_USERNAME or SPACE_NAME repo Variables."
            echo "   Add them under: Settings → Secrets and variables → Actions → Variables."
            exit 1
          fi
          if [ -z "$HF_TOKEN" ]; then
            echo "❌ Missing HF_TOKEN secret (write token for Spaces)."
            echo "   Add it under: Settings → Secrets and variables → Actions → New repository secret."
            exit 1
          fi

          REMOTE_URL="https://${HF_USERNAME}:${HF_TOKEN}@huggingface.co/spaces/${HF_USERNAME}/${SPACE_NAME}"

          echo "🔁 Forcing GitHub HEAD → Space main..."
          git push --force "$REMOTE_URL" HEAD:main

          # Best-effort push for LFS objects (if any)
          git lfs push --all "$REMOTE_URL" main || true

          echo "✅ Sync complete: Space 'main' now matches GitHub HEAD."