name: Check for outdated GitHub Actions
on:
  schedule:
    - cron: '37 20 * * 3'
  workflow_dispatch:

jobs:
  check-actions:
    name: Check for GHA updates
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'

      - name: Install actions-up
        run: npm install -g actions-up

      - name: Run actions-up check
        id: actions-check
        run: |
          echo "GitHub Actions Update Check..."

          # Initialize variables
          HAS_UPDATES=false
          UPDATE_COUNT=0

          # Run actions-up and capture output
          echo "Running actions-up to check for updates..."
          actions-up --dry-run > actions-up-raw.txt 2>&1 || true

          # Parse the output to detect updates
          if grep -q "→" actions-up-raw.txt; then
            HAS_UPDATES=true
            # Count the number of updates (lines with arrows)
            UPDATE_COUNT=$(grep -c "→" actions-up-raw.txt || echo "0")
          fi

          # Create formatted output
          if [ "$HAS_UPDATES" = true ]; then
            echo "Found $UPDATE_COUNT GitHub Actions with available updates"
            echo "actions-up output:"
            cat actions-up-raw.txt
          else
            echo "All GitHub Actions are up to date."
          fi

      - name: Comment PR with updates
        if: github.event_name == 'pull_request'
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            const report = fs.readFileSync('actions-up-report.md', 'utf8');
            const hasUpdates = '${{ steps.actions-check.outputs.has-updates }}' === 'true';
            const updateCount = '${{ steps.actions-check.outputs.update-count }}';

            // Check if we already commented
            const comments = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number
            });

            const botComment = comments.data.find(comment =>
              comment.user.type === 'Bot' &&
              comment.body.includes('GitHub Actions Update Report')
            );

            const commentBody = `${report}

            ---
            *Generated by [actions-up](https://github.com/azat-io/actions-up) | Last check: ${new Date().toISOString()}*`;

            // Only comment if there are updates or if we previously commented
            if (hasUpdates || botComment) {
              if (botComment) {
                // Update existing comment
                await github.rest.issues.updateComment({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  comment_id: botComment.id,
                  body: commentBody
                });
                console.log('Updated existing comment');
              } else {
                // Create new comment only if there are updates
                await github.rest.issues.createComment({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.issue.number,
                  body: commentBody
                });
                console.log('Created new comment');
              }
            } else {
              console.log('No updates found and no previous comment exists - skipping comment');
            }

            // Add or update PR labels based on status
            const labels = await github.rest.issues.listLabelsOnIssue({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number
            });

            const hasOutdatedLabel = labels.data.some(label => label.name === 'outdated-actions');

            if (hasUpdates && !hasOutdatedLabel) {
              // Add label if updates are found
              try {
                await github.rest.issues.addLabels({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.issue.number,
                  labels: ['outdated-actions']
                });
                console.log('Added outdated-actions label');
              } catch (error) {
                console.log('Could not add label (might not exist in repo):', error.message);
              }
            } else if (!hasUpdates && hasOutdatedLabel) {
              // Remove label if no updates
              try {
                await github.rest.issues.removeLabel({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.issue.number,
                  name: 'outdated-actions'
                });
                console.log('Removed outdated-actions label');
              } catch (error) {
                console.log('Could not remove label:', error.message);
              }
            }

      - name: Fail if outdated actions found
        if: steps.actions-check.outputs.has-updates == 'true'
        run: |
          echo "::error:: Found ${{ steps.actions-check.outputs.update-count }} outdated GitHub Actions. Please update them before merging."
          echo ""
          echo "You can update them by running: npx actions-up"
          echo "Or manually update the versions in your workflow files."
          exit 1