name: "Label Fixed Issues"

on:
  pull_request:
    types: [closed]
    branches:
      - develop

jobs:
  label-issues:
    name: "Add 'fixed in develop' label to referenced issues"
    runs-on: ubuntu-latest
    # Only run if the PR was actually merged (not just closed)
    if: github.event.pull_request.merged == true
    permissions:
      issues: write
      pull-requests: read
    steps:
      - name: Extract issue numbers from PR
        id: extract_issues
        uses: actions/github-script@v8
        with:
          script: |
            const prBody = context.payload.pull_request.body || '';
            const prTitle = context.payload.pull_request.title || '';

            // Strip <details> blocks (used by dependabot PRs) and fenced code
            // blocks from the body to avoid matching issue numbers that appear
            // in collapsed/code sections rather than as real references.
            const strippedBody = prBody
              .replace(/<details[\s\S]*?<\/details>/gi, '')
              .replace(/```[\s\S]*?```/g, '');

            const combinedText = `${prTitle}\n${strippedBody}`;

            // Match patterns like "fixes #123", "fixes owner/repo#456",
            // "fixes https://github.com/owner/repo/issues/789", etc.
            // This regex matches common GitHub issue reference patterns
            const issueRegex = /(?:close[sd]?|fix(?:e[sd])?|resolve[sd]?|ref(?:erence)?|see|issue)\s+(?:https?:\/\/github\.com\/[^\/]+\/[^\/]+\/issues\/(\d+)|[^\/\s]+\/[^\/\s]+#(\d+)|[:#]?\s*(\d+))|#(\d+)/gi;
            const matches = [...combinedText.matchAll(issueRegex)];

            // Extract unique issue numbers
            const issueNumbers = [...new Set(matches.map(match => match[1] || match[2] || match[3] || match[4]))];

            console.log(`Found issue references: ${issueNumbers.join(', ')}`);

            // If a PR references more than two issues it is likely a broad
            // change that should not automatically label every mentioned issue.
            if (issueNumbers.length > 2) {
              console.log(`Skipping: PR references ${issueNumbers.length} issues (more than 2).`);
              return [];
            }

            return issueNumbers;

      - name: Add label to issues
        uses: actions/github-script@v8
        with:
          script: |
            const issueNumbers = ${{ steps.extract_issues.outputs.result }};

            if (!issueNumbers || issueNumbers.length === 0) {
              console.log('No issues found to label');
              return;
            }

            const label = 'fixed in develop';
            const owner = context.repo.owner;
            const repo = context.repo.repo;

            for (const issueNumber of issueNumbers) {
              try {
                // Add the label to the issue
                await github.rest.issues.addLabels({
                  owner,
                  repo,
                  issue_number: parseInt(issueNumber),
                  labels: [label],
                });

                console.log(`Added '${label}' label to issue #${issueNumber}`);
              } catch (error) {
                const msg = `Failed to label issue #${issueNumber}`;
                console.error(`${msg}: ${error.message}`);
              }
            }