name: Component PR Welcome

on:
  pull_request_target:
    types: [opened, reopened, synchronize]
    paths:
      - 'cli-tool/components/**'

permissions:
  pull-requests: write
  issues: write

jobs:
  welcome:
    name: Welcome & Label
    runs-on: ubuntu-latest
    steps:
      - name: Add review-pending label and welcome comment
        uses: actions/github-script@v8
        with:
          script: |
            const { owner, repo } = context.repo;
            const prNumber = context.issue.number;
            const author = context.payload.pull_request.user.login;

            const labelName = 'review-pending';
            const labelColor = 'fbca04';
            const labelDescription = 'Component PR awaiting maintainer review';
            const marker = '<!-- component-pr-welcome:v1 -->';

            try {
              await github.rest.issues.getLabel({ owner, repo, name: labelName });
            } catch (err) {
              if (err.status === 404) {
                await github.rest.issues.createLabel({
                  owner,
                  repo,
                  name: labelName,
                  color: labelColor,
                  description: labelDescription,
                });
              } else {
                throw err;
              }
            }

            await github.rest.issues.addLabels({
              owner,
              repo,
              issue_number: prNumber,
              labels: [labelName],
            });

            const existing = await github.paginate(
              github.rest.issues.listComments,
              { owner, repo, issue_number: prNumber, per_page: 100 }
            );
            if (existing.some(c => c.body && c.body.includes(marker))) {
              core.info('Welcome comment already posted — skipping comment, label ensured.');
              return;
            }

            const body = [
              marker,
              `## 👋 Thanks for contributing, @${author}!`,
              ``,
              `This PR touches \`cli-tool/components/**\` and has been marked **\`review-pending\`**.`,
              ``,
              `### What happens next`,
              `1. 🤖 **Automated security audit** runs and posts results on this PR.`,
              `2. 👀 **Maintainer review** — a human reviewer validates the component with the \`component-reviewer\` agent (format, naming, security, clarity).`,
              `3. ✅ **Merge** — once approved, your PR is merged to \`main\`.`,
              `4. 📦 **Catalog regeneration** — the component catalog is rebuilt automatically.`,
              `5. 🚀 **Live on [aitmpl.com](https://www.aitmpl.com)** — your component appears on the website after deploy.`,
              ``,
              `### While you wait`,
              `- Check the **Security Audit** comment below for any issues to fix.`,
              `- Make sure your component follows the [contribution guide](https://github.com/${owner}/${repo}/blob/main/CLAUDE.md#component-system).`,
              ``,
              `_This is an automated message. No action is required from you right now — a maintainer will review soon._`,
            ].join('\n');

            await github.rest.issues.createComment({
              owner,
              repo,
              issue_number: prNumber,
              body,
            });