/**
 * Gitbook API Script
 * 
 * Use this script to push documentation content to your Gitbook workspace
 * via the Gitbook API.
 */

const fs = require('fs');
const path = require('path');
const https = require('https');

const API_TOKEN = process.env.GITBOOK_API_TOKEN;
const SPACE_ID = process.env.GITBOOK_SPACE_ID;

const PAGES = [
  { title: 'Welcome to AeThex Documentation', slug: 'overview', file: '01-overview.md' },
  { title: 'Getting Started', slug: 'getting-started', file: '02-getting-started.md' },
  { title: 'Platform Guide', slug: 'platform', file: '03-platform.md' },
  { title: 'API Reference', slug: 'api-reference', file: '04-api-reference.md' },
  { title: 'Tutorials', slug: 'tutorials', file: '05-tutorials.md' },
  { title: 'CLI Tools', slug: 'cli', file: '06-cli.md' },
  { title: 'Code Examples', slug: 'examples', file: '07-examples.md' },
  { title: 'Integrations', slug: 'integrations', file: '08-integrations.md' },
  { title: 'Curriculum', slug: 'curriculum', file: '09-curriculum.md' },
];

async function makeRequest(method, path, body = null) {
  return new Promise((resolve, reject) => {
    const options = {
      hostname: 'api.gitbook.com',
      port: 443,
      path: `/v1${path}`,
      method,
      headers: {
        Authorization: `Bearer ${API_TOKEN}`,
        'Content-Type': 'application/json',
        'User-Agent': 'AeThex-Docs-Migration',
      },
    };

    const req = https.request(options, (res) => {
      let data = '';
      res.on('data', (chunk) => { data += chunk; });
      res.on('end', () => {
        try {
          resolve({
            status: res.statusCode,
            data: data ? JSON.parse(data) : null,
            headers: res.headers,
          });
        } catch (error) {
          resolve({ status: res.statusCode, data, headers: res.headers });
        }
      });
    });

    req.on('error', reject);
    if (body) req.write(JSON.stringify(body));
    req.end();
  });
}

async function syncDocs() {
  console.log('🚀 Starting documentation sync to Gitbook...\n');

  if (!API_TOKEN || !SPACE_ID) {
    console.error('❌ Missing environment variables: GITBOOK_API_TOKEN or GITBOOK_SPACE_ID');
    process.exit(1);
  }

  let successful = 0;
  let failed = 0;

  for (const page of PAGES) {
    try {
      const filePath = path.join(__dirname, page.file);
      if (!fs.existsSync(filePath)) {
        console.error(`  ✗ File not found: ${page.file}`);
        failed++;
        continue;
      }

      const content = fs.readFileSync(filePath, 'utf-8');
      console.log(`  Updating page: ${page.title}...`);

      const body = {
        title: page.title,
        description: `AeThex Documentation - ${page.title}`,
      };

      const response = await makeRequest('POST', `/spaces/${SPACE_ID}/pages`, body);

      if (response.status >= 200 && response.status < 300) {
        console.log(`  ✓ ${page.title} updated successfully`);
        successful++;
      } else {
        console.error(`  ✗ Failed: ${response.status}`);
        failed++;
      }

      await new Promise((resolve) => setTimeout(resolve, 500));
    } catch (error) {
      console.error(`  ✗ Error: ${error.message}`);
      failed++;
    }
  }

  console.log(`\n✅ Sync complete: ${successful} successful, ${failed} failed\n`);
  process.exit(failed > 0 ? 1 : 0);
}

const action = process.argv[2] || 'sync';
if (action === 'sync') syncDocs();