name: Update Community PRs After Merge

on:
  push:
    branches: [main]
    paths:
      - 'community/**'
      - 'schemas/community_submission.v1.schema.json'

permissions:
  contents: write
  pull-requests: write

jobs:
  update-open-prs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.12"

      - name: Install dependencies
        run: pip install jsonschema

      - name: Find and update open community PRs
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # Get list of open community PRs
          prs=$(gh pr list --label community --state open --json number,headRefName --jq '.[] | "\(.number) \(.headRefName)"')
          
          if [ -z "$prs" ]; then
            echo "No open community PRs found"
            exit 0
          fi
          
          echo "$prs" | while read pr_number branch_name; do
            echo "Processing PR #$pr_number (branch: $branch_name)"
            
            # Checkout PR branch
            git fetch origin "$branch_name"
            git checkout "$branch_name"
            
            git config user.name "github-actions[bot]"
            git config user.email "github-actions[bot]@users.noreply.github.com"
            
            # Get the community submission file(s) and schema from this branch
            community_files=$(git diff --name-only origin/main...HEAD -- 'community/' 'schemas/')
            
            if [ -z "$community_files" ]; then
              echo "  No community/schema files found in PR #$pr_number, skipping"
              git checkout main
              continue
            fi
            
            echo "  Files to preserve: $community_files"
            
            # Save the community files content
            mkdir -p /tmp/pr_files
            for file in $community_files; do
              if [ -f "$file" ]; then
                mkdir -p "/tmp/pr_files/$(dirname "$file")"
                cp "$file" "/tmp/pr_files/$file"
              fi
            done
            
            # Reset branch to main (clean slate)
            git reset --hard origin/main
            
            # Restore the community files
            for file in $community_files; do
              if [ -f "/tmp/pr_files/$file" ]; then
                mkdir -p "$(dirname "$file")"
                cp "/tmp/pr_files/$file" "$file"
              fi
            done
            rm -rf /tmp/pr_files
            
            # Regenerate schema with current main + this submission's tags
            python -m src.contributions.regenerate_pr_schema || true
            
            # Stage and commit all changes
            git add community/ schemas/
            if ! git diff --cached --quiet; then
              git commit -m "Community submission (rebased on main)"
              git push --force origin "$branch_name"
              echo "  Rebased PR #$pr_number onto main"
            else
              echo "  No changes needed for PR #$pr_number"
            fi
            
            git checkout main
          done