# Fallback for fork PRs: phase 1 (codeowner-approved-label.yml) handles
# non-fork PRs directly but can't write labels on fork PRs (read-only token).
# This workflow re-determines the action and applies it if needed.

name: Codeowner Approved Label Update

on:
  workflow_run:
    workflows: ["Codeowner Approved Label"]
    types: [completed]

permissions:
  issues: write
  pull-requests: read
  contents: read

jobs:
  update-label:
    name: Run
    if: >
      github.event.workflow_run.conclusion == 'success' &&
      github.event.workflow_run.event == 'pull_request_review'
    runs-on: ubuntu-latest
    steps:
      - name: Get PR details
        id: pr
        env:
          GH_TOKEN: ${{ github.token }}
          HEAD_SHA: ${{ github.event.workflow_run.head_sha }}
          REPO: ${{ github.repository }}
        run: |
          pr_data=$(gh pr list --repo "$REPO" --state open --search "$HEAD_SHA" \
            --json number,baseRefName --jq '.[0] // empty')

          if [ -z "$pr_data" ]; then
            echo "No open PR found for SHA $HEAD_SHA, skipping"
            echo "skip=true" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          pr_number=$(echo "$pr_data" | jq -r '.number')
          base_ref=$(echo "$pr_data" | jq -r '.baseRefName')

          echo "pr_number=$pr_number" >> "$GITHUB_OUTPUT"
          echo "base_ref=$base_ref" >> "$GITHUB_OUTPUT"
          echo "Found PR #$pr_number targeting $base_ref"

      - name: Checkout base repository
        if: steps.pr.outputs.skip != 'true'
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          repository: ${{ github.repository }}
          ref: ${{ steps.pr.outputs.base_ref }}
          sparse-checkout: |
            .github/scripts/codeowners.js
            CODEOWNERS

      - name: Update label
        if: steps.pr.outputs.skip != 'true'
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        env:
          PR_NUMBER: ${{ steps.pr.outputs.pr_number }}
        with:
          script: |
            const { loadCodeowners, determineLabelAction, LabelAction } = require('./.github/scripts/codeowners.js');

            const owner = context.repo.owner;
            const repo = context.repo.repo;
            const pr_number = parseInt(process.env.PR_NUMBER, 10);
            const LABEL_NAME = 'code-owner-approved';

            console.log(`Processing PR #${pr_number} for codeowner approval label`);

            const codeownersPatterns = loadCodeowners();
            const action = await determineLabelAction(
              github, owner, repo, pr_number, codeownersPatterns, LABEL_NAME
            );

            if (action === LabelAction.ADD) {
              await github.rest.issues.addLabels({
                owner, repo, issue_number: pr_number, labels: [LABEL_NAME]
              });
              console.log(`Added '${LABEL_NAME}' label`);
            } else if (action === LabelAction.REMOVE) {
              try {
                await github.rest.issues.removeLabel({
                  owner, repo, issue_number: pr_number, name: LABEL_NAME
                });
                console.log(`Removed '${LABEL_NAME}' label`);
              } catch (error) {
                if (error.status !== 404) throw error;
              }
            } else {
              console.log('No label change needed');
            }