name: Two-Way Sync: GitHub ↔ Hugging Face Hub

on:
  push:
    branches:
      - main

  workflow_dispatch:
    inputs:
      sync_direction:
        description: "Choose sync direction"
        required: true
        default: "github-to-huggingface"
        type: choice
        options:
          - github-to-huggingface
          - huggingface-to-github

permissions:
  contents: write

concurrency:
  group: repo-sync-main
  cancel-in-progress: false

jobs:
  sync-github-to-huggingface:
    name: Sync GitHub to Hugging Face
    if: github.event_name == 'push' || github.event.inputs.sync_direction == 'github-to-huggingface'
    runs-on: ubuntu-latest

    steps:
      - name: Checkout GitHub repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Validate required secrets
        env:
          HF_TOKEN: ${{ secrets.HF_TOKEN }}
          HF_USERNAME: ${{ secrets.HF_USERNAME }}
        run: |
          test -n "$HF_TOKEN" || (echo "HF_TOKEN is missing" && exit 1)
          test -n "$HF_USERNAME" || (echo "HF_USERNAME is missing" && exit 1)

      - name: Configure Git identity
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"

      - name: Add Hugging Face remote
        env:
          HF_TOKEN: ${{ secrets.HF_TOKEN }}
          HF_USERNAME: ${{ secrets.HF_USERNAME }}
        run: |
          REPO_NAME="${GITHUB_REPOSITORY#*/}"

          git remote remove huggingface 2>/dev/null || true
          git remote add huggingface "https://${HF_USERNAME}:${HF_TOKEN}@huggingface.co/spaces/${HF_USERNAME}/${REPO_NAME}"

      - name: Verify remotes
        run: |
          git remote -v | sed 's#https://.*@huggingface.co#https://***@huggingface.co#g'

      - name: Fetch Hugging Face state
        run: |
          git fetch huggingface main || true

      - name: Push GitHub main to Hugging Face
        run: |
          git push huggingface main:main --force-with-lease

  sync-huggingface-to-github:
    name: Sync Hugging Face to GitHub
    if: github.event_name == 'workflow_dispatch' && github.event.inputs.sync_direction == 'huggingface-to-github'
    runs-on: ubuntu-latest

    steps:
      - name: Validate required secrets
        env:
          HF_TOKEN: ${{ secrets.HF_TOKEN }}
          HF_USERNAME: ${{ secrets.HF_USERNAME }}
          GH_PAT: ${{ secrets.GH_PAT }}
        run: |
          test -n "$HF_TOKEN" || (echo "HF_TOKEN is missing" && exit 1)
          test -n "$HF_USERNAME" || (echo "HF_USERNAME is missing" && exit 1)
          test -n "$GH_PAT" || (echo "GH_PAT is missing" && exit 1)

      - name: Checkout GitHub repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GH_PAT }}

      - name: Configure Git identity
        run: |
          git config --global user.name "repo-sync-bot"
          git config --global user.email "repo-sync-bot@users.noreply.github.com"

      - name: Add Hugging Face remote
        env:
          HF_TOKEN: ${{ secrets.HF_TOKEN }}
          HF_USERNAME: ${{ secrets.HF_USERNAME }}
        run: |
          REPO_NAME="${GITHUB_REPOSITORY#*/}"

          git remote remove huggingface 2>/dev/null || true
          git remote add huggingface "https://${HF_USERNAME}:${HF_TOKEN}@huggingface.co/spaces/${HF_USERNAME}/${REPO_NAME}"

      - name: Fetch Hugging Face main
        run: |
          git fetch huggingface main

      - name: Merge Hugging Face into GitHub
        run: |
          git checkout main
          git merge huggingface/main --no-edit --allow-unrelated-histories

      - name: Push merged state to GitHub
        run: |
          git push origin main