name: Close external PR

on:
  pull_request_target:
    types: [closed]
    branches: 
      - amd-staging

jobs:
  git-mirror:
    runs-on: ubuntu-latest
    if: github.event.pull_request.head.repo.full_name == 'AMD-ROCm-Internal/aqlprofile' && contains(github.event.pull_request.head.ref, 'external-pr')
    steps:
      - name: Get Current PR Body
        id: current_pr
        run: |
          # Use the PR body directly from the event payload
          # This is the body as it was when the 'opened' or 'edited' event was triggered.
          RAW_PR_BODY="${{ github.event.pull_request.body }}"

          # Handle cases where the body might be null (e.g., an empty PR description)
          # In bash, an unset or null variable in quotes becomes an empty string,
          # but it's good practice to be explicit or test.
          # If RAW_PR_BODY is null from the JSON payload, it will be treated as an empty string here by bash.
          # For more robust null handling if needed elsewhere: PR_BODY_FOR_SCRIPT="${RAW_PR_BODY:-}"
          PR_BODY_FOR_SCRIPT="$RAW_PR_BODY"

          echo "PR Body from event payload (first 500 chars):"
          echo "${PR_BODY_FOR_SCRIPT:0:500}" # Print a snippet for logging
          echo "-------------------"

          # If you need to pass this body to subsequent steps via GITHUB_OUTPUT,
          # the multiline escaping is still crucial.
          ESCAPED_PR_BODY="${RAW_PR_BODY//'%'/'%25'}"
          ESCAPED_PR_BODY="${ESCAPED_PR_BODY//$'\n'/'%0A'}"
          ESCAPED_PR_BODY="${ESCAPED_PR_BODY//$'\r'/'%0D'}"

          echo "PR_BODY_CONTENT<<EOF" >> $GITHUB_OUTPUT
          echo "$ESCAPED_PR_BODY" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      - name: Extract Remote PR URL and Info
        id: remote_pr_info
        run: |
          PR_BODY="${{ steps.current_pr.outputs.PR_BODY_CONTENT }}"
          echo "Current PR Body:"
          echo "${PR_BODY}"
          echo "-------------------"

          # Regex to find GitHub PR URLs. This is a common pattern.
          # It captures owner, repo, and pr_number.
          REMOTE_PR_URL_REGEX="https://github.com/([^/]+)/([^/]+)/pull/([0-9]+)"

          if [[ "$PR_BODY" =~ $REMOTE_PR_URL_REGEX ]]; then
            REMOTE_PR_URL="${BASH_REMATCH[0]}"
            REMOTE_OWNER="${BASH_REMATCH[1]}"
            REMOTE_REPO="${BASH_REMATCH[2]}"
            REMOTE_PR_NUMBER="${BASH_REMATCH[3]}"

            echo "Found Remote PR URL: $REMOTE_PR_URL"
            echo "Remote Owner: $REMOTE_OWNER"
            echo "Remote Repo: $REMOTE_REPO"
            echo "Remote PR Number: $REMOTE_PR_NUMBER"

            echo "REMOTE_PR_URL=$REMOTE_PR_URL" >> $GITHUB_OUTPUT
            echo "REMOTE_OWNER=$REMOTE_OWNER" >> $GITHUB_OUTPUT
            echo "REMOTE_REPO=$REMOTE_REPO" >> $GITHUB_OUTPUT
            echo "REMOTE_PR_NUMBER=$REMOTE_PR_NUMBER" >> $GITHUB_OUTPUT
            echo "FOUND_URL=true" >> $GITHUB_OUTPUT
          else
            echo "::warning::No GitHub PR URL found in the current PR body."
            echo "FOUND_URL=false" >> $GITHUB_OUTPUT
          fi

      - name: Output Results
        if: steps.remote_pr_info.outputs.FOUND_URL == 'true'
        run: |
          echo "Successfully retrieved branch info from remote PR."
          echo "Remote PR URL: ${{ steps.remote_pr_info.outputs.REMOTE_PR_URL }}"

      - name: Handle No URL Found
        if: steps.remote_pr_info.outputs.FOUND_URL == 'false'
        run: |
          echo "No remote PR URL was found in the body of PR #${{ github.event.pull_request.number }}."
      
      - name: Comment on and Close External PR
        if: steps.remote_pr_info.outputs.FOUND_URL == 'true'
        env:
          GH_TOKEN: ${{ secrets.EXT_TOKEN }}
          EXTERNAL_PR_NUMBER: ${{ steps.remote_pr_info.outputs.REMOTE_PR_NUMBER }}
          EXTERNAL_REPO: "ROCm/aqlprofile"
        run: |
          COMMENT_BODY="This pull request has been closed in the internal repository. Thank you for your contribution!"

          gh pr comment "$EXTERNAL_PR_NUMBER" \
            --repo "$EXTERNAL_REPO" \
            --body "$COMMENT_BODY"

          gh pr close "$EXTERNAL_PR_NUMBER" \
            --repo "$EXTERNAL_REPO"

          echo "Commented on and Closed external PR #${EXTERNAL_PR_NUMBER}"