name: PR Comment

# WARNING:
# THIS WORKFLOW ALWAYS RUNS FOR EXTERNAL CONTRIBUTORS WITHOUT ANY APPROVAL.
# THIS WORKFLOW RUNS FROM MAIN BRANCH, NOT FROM THE PR BRANCH.
# DO NOT PULL THE PR OR EXECUTE ANY CODE FROM THE PR.

on:
  pull_request_target:
    types: [opened, reopened, synchronize]
    branches:
      - main


jobs:
  comment-on-pr:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write

    steps:
      # NOTE: The following checks may not be accurate depending on Org or Repo settings.
      - name: Check user and potential secret access
        id: check-secrets-access
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          USER_LOGIN="${{ github.event.pull_request.user.login }}"
          REPO_OWNER="${{ github.repository_owner }}"
          REPO_NAME="${{ github.event.repository.name }}"

          echo "Pull request opened by: $USER_LOGIN"

          # Check if PR is from a fork
          IS_FORK=$([[ "${{ github.event.pull_request.head.repo.full_name }}" != "${{ github.repository }}" ]] && echo "true" || echo "false")

          HAS_ACCESS="false"

          # Check user's permission level on the repository
          USER_PERMISSION=$(gh api repos/$REPO_OWNER/$REPO_NAME/collaborators/$USER_LOGIN/permission --jq '.permission')

          if [[ "$USER_PERMISSION" == "admin" || "$USER_PERMISSION" == "write" ]]; then
            HAS_ACCESS="true"
          elif [[ "$USER_PERMISSION" == "read" ]]; then
            # For read access, we need to check if the user has been explicitly granted secret access
            # This information is not directly available via API, so we'll make an assumption
            # that read access does not imply secret access
            HAS_ACCESS="false"
          fi

          # Check if repo owner is an organization
          IS_ORG=$(gh api users/$REPO_OWNER --jq '.type == "Organization"')

          if [[ "$IS_ORG" == "true" && "$HAS_ACCESS" == "false" ]]; then
            # Check if user is a member of any team with write or admin access to the repo
            TEAMS_WITH_ACCESS=$(gh api repos/$REPO_OWNER/$REPO_NAME/teams --jq '.[] | select(.permission == "push" or .permission == "admin") | .slug')
            for team in $TEAMS_WITH_ACCESS; do
              IS_TEAM_MEMBER=$(gh api orgs/$REPO_OWNER/teams/$team/memberships/$USER_LOGIN --silent && echo "true" || echo "false")
              if [[ "$IS_TEAM_MEMBER" == "true" ]]; then
                HAS_ACCESS="true"
                break
              fi
            done
          fi

          # If it's a fork, set HAS_ACCESS to false regardless of other checks
          if [[ "$IS_FORK" == "true" ]]; then
            HAS_ACCESS="false"
          fi

          echo "has_secrets_access=$HAS_ACCESS" >> $GITHUB_OUTPUT
          if [[ "$HAS_ACCESS" == "true" ]]; then
            echo "User $USER_LOGIN likely has access to secrets"
          else
            echo "User $USER_LOGIN likely does not have access to secrets"
          fi


      - uses: actions/checkout@v4

      - name: Delete old comments
        if: steps.check-secrets-access.outputs.has_secrets_access != 'true'
        env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
            # Delete previous comment if it exists
            previous_comment_ids=$(gh api "repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments" \
              --jq '.[] | select(.body | startswith("<!-- INTEGRATION_TESTS -->")) | .id')
            echo "Previous comment IDs: $previous_comment_ids"
            # Iterate over each comment ID and delete the comment
            if [ ! -z "$previous_comment_ids" ]; then
              echo "$previous_comment_ids" | while read -r comment_id; do
                echo "Deleting comment with ID: $comment_id"
                gh api "repos/${{ github.repository }}/issues/comments/$comment_id" -X DELETE
              done
            fi

      - name: Comment on PR
        if: steps.check-secrets-access.outputs.has_secrets_access != 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          COMMIT_SHA: ${{ github.event.pull_request.head.sha }}
        run: |
          gh pr comment ${{ github.event.pull_request.number }} --body \
          "<!-- INTEGRATION_TESTS -->
          Run integration tests manually:
          [go/deco-tests-run/cli](https://go/deco-tests-run/cli)

          Inputs:
          * PR number: ${{github.event.pull_request.number}}
          * Commit SHA: \`${{ env.COMMIT_SHA }}\`

          Checks will be approved automatically on success.
          "