name: Deploy to HF Space

# Two triggers:
#   - workflow_dispatch: manual, always deploys.
#   - schedule: nightly at 00:00 UTC, but only if main has changed since
#     the last deploy (compared directly against what's already on the
#     hf-tts remote) — a no-op night doesn't rebuild the Space.
on:
  workflow_dispatch: {}
  schedule:
    - cron: "0 0 * * *"

jobs:
  check-for-changes:
    name: Check for changes since last deploy
    if: github.event_name == 'schedule'
    runs-on: ubuntu-latest
    outputs:
      changed: ${{ steps.check.outputs.changed }}
    steps:
      - uses: actions/checkout@v7

      - id: check
        env:
          HF_TOKEN: ${{ secrets.HF_TOKEN }}
        run: |
          git remote add hf-tts "https://user:${HF_TOKEN}@huggingface.co/spaces/GarchenArchive/ArchiveAI-TTS"
          if git fetch hf-tts main --quiet 2>/dev/null && [ "$(git rev-parse HEAD)" = "$(git rev-parse hf-tts/main)" ]; then
            echo "No changes on main since the last deploy — skipping nightly run."
            echo "changed=false" >> "$GITHUB_OUTPUT"
          else
            echo "main has changed (or no prior deploy found) — proceeding."
            echo "changed=true" >> "$GITHUB_OUTPUT"
          fi

  deploy:
    name: Push to GarchenArchive/ArchiveAI-TTS
    needs: check-for-changes
    if: always() && (github.event_name == 'workflow_dispatch' || needs.check-for-changes.outputs.changed == 'true')
    runs-on: ubuntu-latest
    concurrency:
      group: archiveai-tts-deploy
      cancel-in-progress: false
    steps:
      - uses: actions/checkout@v7
        with:
          lfs: true
          fetch-depth: 0  # HF's git server rejects a shallow push ("shallow update not allowed")

      - name: Push to HF Space
        env:
          HF_TOKEN: ${{ secrets.HF_TOKEN }}
        run: |
          git remote add hf-tts "https://user:${HF_TOKEN}@huggingface.co/spaces/GarchenArchive/ArchiveAI-TTS"
          git push hf-tts HEAD:main --force