#!/usr/bin/env node

/**
 * Test script for webhook signature verification
 * Tests both valid and invalid signatures to ensure security is working
 */

import crypto from 'crypto';
import http from 'http';

const TEST_PORT = 3099;
const TEST_SECRET = 'test-secret-12345';

// Test payload
const payload = JSON.stringify({
  ref: 'refs/heads/main',
  repository: {
    name: 'test-repo',
    full_name: 'user/test-repo'
  },
  pusher: {
    username: 'testuser'
  }
});

// Generate valid signature
function generateSignature(payload, secret) {
  const hmac = crypto.createHmac('sha256', secret);
  hmac.update(payload, 'utf8');
  return hmac.digest('hex');
}

// Send webhook request
async function sendWebhook(port, payload, signature, description) {
  return new Promise((resolve, reject) => {
    const options = {
      hostname: '127.0.0.1',
      port: port,
      path: '/webhook',
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Content-Length': Buffer.byteLength(payload),
        'X-Gogs-Event': 'push',
        'X-Gogs-Delivery': '12345'
      }
    };

    if (signature) {
      options.headers['X-Gogs-Signature'] = signature;
    }

    const req = http.request(options, (res) => {
      let data = '';
      res.on('data', chunk => data += chunk);
      res.on('end', () => {
        resolve({
          statusCode: res.statusCode,
          body: data,
          description
        });
      });
    });

    req.on('error', reject);
    req.write(payload);
    req.end();
  });
}

// Start test server
async function startTestServer() {
  const { WebhookServer } = await import('./src/server.js');
  const server = new WebhookServer({
    host: '127.0.0.1',
    port: TEST_PORT,
    secret: TEST_SECRET
  });

  return new Promise((resolve) => {
    server.start();
    // Give server time to start
    setTimeout(() => resolve(server), 500);
  });
}

// Run tests
async function runTests() {
  console.log('🧪 Starting signature verification tests...\n');

  const server = await startTestServer();

  try {
    // Test 1: Valid signature
    const validSignature = generateSignature(payload, TEST_SECRET);
    const test1 = await sendWebhook(
      TEST_PORT,
      payload,
      validSignature,
      'Valid signature'
    );

    console.log(`✓ Test 1: ${test1.description}`);
    console.log(`  Status: ${test1.statusCode} ${test1.statusCode === 200 ? '✓ PASS' : '✗ FAIL'}`);
    console.log(`  Response: ${test1.body}\n`);

    // Test 2: Invalid signature
    const test2 = await sendWebhook(
      TEST_PORT,
      payload,
      'invalid-signature-123',
      'Invalid signature'
    );

    console.log(`✓ Test 2: ${test2.description}`);
    console.log(`  Status: ${test2.statusCode} ${test2.statusCode === 401 ? '✓ PASS' : '✗ FAIL'}`);
    console.log(`  Response: ${test2.body}\n`);

    // Test 3: Missing signature
    const test3 = await sendWebhook(
      TEST_PORT,
      payload,
      null,
      'Missing signature'
    );

    console.log(`✓ Test 3: ${test3.description}`);
    console.log(`  Status: ${test3.statusCode} ${test3.statusCode === 401 ? '✓ PASS' : '✗ FAIL'}`);
    console.log(`  Response: ${test3.body}\n`);

    // Summary
    const results = [test1, test2, test3];
    const passed = results.filter((r, i) => {
      if (i === 0) return r.statusCode === 200;
      return r.statusCode === 401;
    }).length;

    console.log('═══════════════════════════════════════');
    console.log(`Results: ${passed}/3 tests passed`);
    console.log('═══════════════════════════════════════\n');

    if (passed === 3) {
      console.log('✅ All signature verification tests passed!');
      console.log('   - Valid signatures are accepted (200)');
      console.log('   - Invalid signatures are rejected (401)');
      console.log('   - Missing signatures are rejected (401)');
    } else {
      console.log('❌ Some tests failed!');
      process.exitCode = 1;
    }

  } finally {
    await server.stop();
    console.log('\n🛑 Test server stopped');
  }
}

runTests().catch(err => {
  console.error('❌ Test error:', err);
  process.exit(1);
});