name: Close Discussion on PR Merge

on:
  pull_request:
    types: [closed]

jobs:
  closeDiscussion:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Check if PR was merged
        if: github.event.pull_request.merged == true
        run: echo "PR was merged"
        
      - name: Extract Discussion Number & Close If any Were Found
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        if: github.event.pull_request.merged == true
        id: extract-discussion
        run: |
          pr_body="${{ github.event.pull_request.body }}"
          discussion_ids=$(echo "$pr_body" | grep -oP '(?i)(resolve|fix|close)[s|d]? #\K[0-9]+')
          
          if [ -z "$discussion_ids" ]; then
            echo "No discussion IDs found."
            exit 0
          fi

          for discussion_id in $discussion_ids; do
            echo "Closing discussion #$discussion_id"
            response=$(curl -s -o /dev/null -w "%{http_code}" -X PATCH -H "Authorization: token $GITHUB_TOKEN" \
                 -d '{"state": "closed"}' \
                 "https://api.github.com/repos/${{ github.repository }}/discussions/$discussion_id")
            
            if [ "$response" -ne 200 ]; then
              echo "Failed to close discussion #$discussion_id. HTTP status code: $response"
              exit 1
            fi
          done
        shell: bash