name: Swedish Accounting Compliance Review

# Stage 2 of the fork-safe compliance review (stage 1 is swedish-compliance-diff.yml).
#
# SECURITY: this is the privileged half: it has the AWS Bedrock secrets and a
# write token. It is triggered by `workflow_run` (NOT pull_request_target) and
# checks out ONLY the base repo, so it never executes fork PR code. The untrusted
# input (the PR diff) arrives as a downloaded artifact and is fed to the model
# as DATA: never run. This is the pattern GitHub recommends instead of
# `pull_request_target` + checking out the PR head.

on:
  workflow_run:
    # Must match the `name:` field in swedish-compliance-diff.yml exactly.
    # A rename there silently stops this trigger from firing on all subsequent PRs.
    workflows: ["Compliance diff"]
    types: [completed]

permissions:
  contents: read
  actions: read          # required to download the artifact from the triggering run
  pull-requests: write   # required to post the review comment

jobs:
  review:
    runs-on: ubuntu-latest
    timeout-minutes: 10
    # Only act on PR-triggered diffs that actually produced an artifact.
    if: >
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.conclusion == 'success'
    steps:
      # Base repo only: the TRUSTED copy of the script and .claude/skills/.
      # persist-credentials: false, no later step needs git push creds, so don't
      # leave the token in .git/config for the steps that handle untrusted input.
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
        with:
          persist-credentials: false
      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
        with:
          node-version: 20
      - name: Download diff artifact
        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
        with:
          name: compliance-input
          run-id: ${{ github.event.workflow_run.id }}
          github-token: ${{ secrets.GITHUB_TOKEN }}
      - name: Resolve PR number
        id: pr
        run: |
          set -euo pipefail
          NUM=$(cat pr-number.txt)
          # Guard: pr-number.txt must be a plain integer (artifact is untrusted input).
          if ! [[ "$NUM" =~ ^[0-9]+$ ]]; then
            echo "Refusing to continue: pr-number.txt is not a number" >&2
            exit 1
          fi
          echo "number=$NUM" >> "$GITHUB_OUTPUT"
      - name: Install Anthropic Bedrock SDK
        # Pinned exact version + --ignore-scripts: this is the privileged job
        # (write token in env), so no floating @latest and no dependency
        # lifecycle scripts may execute here.
        run: npm install --no-save --no-package-lock --ignore-scripts @anthropic-ai/bedrock-sdk@0.31.0
      - name: Run compliance review
        env:
          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
          AWS_REGION: ${{ secrets.AWS_REGION || 'eu-north-1' }}
          REVIEW_MODEL: eu.anthropic.claude-sonnet-4-6
          # Two-stage mode: read the diff from the artifact instead of git-diffing.
          DIFF_FILE: diff.patch
          FILES_FILE: files.txt
        run: node scripts/swedish-compliance-review.mjs
      - name: Find previous compliance comment
        uses: peter-evans/find-comment@3eae4d37986fb5a8592848f6a574fdf654e61f9e # v3
        id: find-comment
        with:
          issue-number: ${{ steps.pr.outputs.number }}
          comment-author: 'github-actions[bot]'
          body-includes: '<!-- swedish-compliance-review-bot -->'
      - name: Post or update PR comment
        uses: peter-evans/create-or-update-comment@e8674b075228eee787fea43ef493e45ece1004c9 # v5
        with:
          issue-number: ${{ steps.pr.outputs.number }}
          comment-id: ${{ steps.find-comment.outputs.comment-id }}
          body-path: review.md
          edit-mode: replace