name: Mirror External PR to Internal Repo

on:
  pull_request_target:
    types: [opened, synchronize]
    branches:
      - amd-staging

jobs:
  mirror_pr:
    runs-on: ubuntu-latest
    if: github.event.pull_request.head.repo.full_name != 'AMD-ROCm-Internal/aqlprofile'

    steps:
      - name: Checkout PR base
        uses: actions/checkout@v4

      - name: Setup Git User
        run: |
          git config --global user.name 'External PR Mirror Bot'
          git config --global user.email 'bot@users.noreply.github.com'

      - uses: wei/git-sync@v3
        name: Push branch to Internal Repository
        with:
          source_repo: "https://${{ secrets.EXTERNAL_REPO_TOKEN }}@github.com/ROCm/aqlprofile.git"
          source_branch: "${{ github.event.pull_request.head.ref }}"
          destination_repo: "https://${{ secrets.INTERNAL_REPO_TOKEN }}@github.com/AMD-ROCm-Internal/aqlprofile.git"
          destination_branch: "external-pr/${{ github.event.pull_request.number }}"

      - name: Create Pull Request in Internal Repository
        if: ${{ github.event.action == 'opened' }}
        id: create_internal_pr
        env:
          GH_TOKEN: ${{ secrets.INTERNAL_REPO_TOKEN }}
          INTERNAL_REPO: "AMD-ROCm-Internal/aqlprofile"
          INTERNAL_BASE_BRANCH: "amd-staging"
          HEAD_BRANCH: "external-pr/${{ github.event.pull_request.number }}"
          PR_TITLE: "Mirror: ${{ github.event.pull_request.title }} (Ext PR #${{ github.event.pull_request.number }})"
          PR_BODY: |
            This PR mirrors changes from external pull request: ${{ github.event.pull_request.html_url }}

            Original PR Body:
            -------------------
            ${{ github.event.pull_request.body }}
        run: |
          # Create PR and capture its URL
          INTERNAL_PR_URL=$(gh pr create \
            --repo "$INTERNAL_REPO" \
            --base "$INTERNAL_BASE_BRANCH" \
            --head "$HEAD_BRANCH" \
            --title "$PR_TITLE" \
            --body "$PR_BODY")

          if [ -z "$INTERNAL_PR_URL" ]; then
            echo "Failed to create internal PR. URL is empty."
            # Check if PR already exists (gh pr create might not fail if branch has open PR)
            EXISTING_PR_URL=$(gh pr list --repo "$INTERNAL_REPO" --head "$HEAD_BRANCH" --json url -q '.[0].url')
            if [ -n "$EXISTING_PR_URL" ]; then
              echo "Internal PR already exists: $EXISTING_PR_URL"
              echo "INTERNAL_PR_URL=$EXISTING_PR_URL" >> $GITHUB_OUTPUT
            else
              echo "::error::Failed to create or find existing internal PR."
              exit 1
            fi
          fi


      - name: Comment on and Close External PR
        if: steps.create_internal_pr.outputs.INTERNAL_PR_URL != ''
        env:
          GH_TOKEN: ${{ secrets.EXTERNAL_REPO_TOKEN }}
          EXTERNAL_PR_NUMBER: ${{ github.event.pull_request.number }}
          EXTERNAL_REPO: ${{ github.repository }}
        run: |
          COMMENT_BODY="This pull request has been mirrored to our internal repository for review and integration. Thank you for your contribution!"

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

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