name: Contributor Attribution Check

on:
  workflow_call:
    outputs:
      review_status:
        description: "JSON array of review status objects"
        value: ${{ jobs.check-attribution.outputs.review_status }}

permissions:
  contents: read

jobs:
  check-attribution:
    runs-on: ubuntu-latest
    timeout-minutes: 10
    outputs:
      review_status: ${{ steps.check-emails.outputs.review_status }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
        with:
          fetch-depth: 0  # Full history needed for git log

      - name: Check for unmapped contributor emails
        id: check-emails
        run: |
          # Get the merge base between this PR and main
          MERGE_BASE=$(git merge-base origin/main HEAD)

          # Find any new author emails in this PR's commits
          NEW_EMAILS=$(git log ${MERGE_BASE}..HEAD --format='%ae' --no-merges | sort -u)

          if [ -z "$NEW_EMAILS" ]; then
            echo "No new commits to check."
            echo "review_status=[]" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          # An email is mapped if it has a file in contributors/emails/
          # (one file per email — conflict-free) or an entry in the frozen
          # legacy AUTHOR_MAP in scripts/release.py.
          MISSING=""
          while IFS= read -r email; do
            # Skip teknium and bot emails
            case "$email" in
              *teknium*|*noreply@github.com*|*dependabot*|*github-actions*|*anthropic.com*|*cursor.com*)
                continue ;;
            esac

            if echo "$email" | grep -qP '\+.*@users\.noreply\.github\.com'; then
              continue  # GitHub id+login noreply emails auto-resolve
            fi

            if [ -f "contributors/emails/${email}" ]; then
              continue  # mapped via the contributors directory
            fi

            if ! grep -qF "\"${email}\"" scripts/release.py 2>/dev/null; then
              AUTHOR=$(git log --author="$email" --format='%an' -1)
              MISSING="${MISSING}\n  ${email} (${AUTHOR})"
            fi
          done <<< "$NEW_EMAILS"

          if [ -n "$MISSING" ]; then
            echo ""
            echo "⚠️  New contributor email(s) without a mapping:"
            echo -e "$MISSING"
            echo ""
            echo "Add a mapping file (do NOT edit AUTHOR_MAP in release.py):"
            echo -e "$MISSING" | while read -r line; do
              email=$(echo "$line" | sed 's/^ *//' | cut -d' ' -f1)
              [ -z "$email" ] && continue
              echo "    python3 scripts/add_contributor.py ${email} <github-username>"
            done
            echo ""
            echo "To find the GitHub username for an email:"
            echo "  gh api 'search/users?q=EMAIL+in:email' --jq '.items[0].login'"

            # Emit review_status for unmapped emails
            DETAIL=$(echo -e "$MISSING" | sed '/^$/d; s/^  //')
            HOW_TO_FIX=$'Add mappings to scripts/release.py AUTHOR_MAP:\n```\n"<email>": "<github-username>",\n```\nTo find the GitHub username for an email:\n```\ngh api \'search/users?q=EMAIL+in:email\' --jq \'.items[0].login\'\n```\n'
            REVIEW_STATUS=$(jq -nc \
              --arg detail "$DETAIL" \
              --arg how_to_fix "$HOW_TO_FIX" \
              '[{"source":"contributor attribution","results":[{"kind":"action_required","title":"Unmapped contributor email(s)","summary":"New contributor email(s) are not in AUTHOR_MAP.","detail":$detail,"how_to_fix":$how_to_fix}]}]')
            echo "review_status=$REVIEW_STATUS" >> "$GITHUB_OUTPUT"

            exit 1
          else
            echo "✅ All contributor emails are mapped."
          fi