import { expect, tap } from '@push.rocks/tapbundle';
import { SmartProxy } from '../ts/index.js';

/**
 * Test that verifies mutex prevents race conditions during concurrent route updates
 */
tap.test('should handle concurrent route updates without race conditions', async (tools) => {
  tools.timeout(10000);
  
  const settings = {
    port: 6001,
    routes: [
      {
        name: 'initial-route',
        match: {
          ports: 80
        },
        action: {
          type: 'forward' as const,
          targetUrl: 'http://localhost:3000'
        }
      }
    ],
    acme: {
      email: 'test@test.com',
      port: 80
    }
  };
  
  const proxy = new SmartProxy(settings);
  await proxy.start();
  
  // Simulate concurrent route updates
  const updates = [];
  for (let i = 0; i < 5; i++) {
    updates.push(proxy.updateRoutes([
      ...settings.routes,
      {
        name: `route-${i}`,
        match: {
          ports: [443]
        },
        action: {
          type: 'forward' as const,
          targetUrl: `https://localhost:${3001 + i}`,
          tls: {
            mode: 'terminate' as const,
            certificate: 'auto'
          }
        }
      }
    ]));
  }
  
  // All updates should complete without errors
  await Promise.all(updates);
  
  // Verify final state
  const currentRoutes = proxy['settings'].routes;
  tools.expect(currentRoutes.length).toEqual(2); // Initial route + last update
  
  await proxy.stop();
});

/**
 * Test that verifies mutex serializes route updates
 */
tap.test('should serialize route updates with mutex', async (tools) => {
  tools.timeout(10000);
  
  const settings = {
    port: 6002,
    routes: [{
      name: 'test-route',
      match: { ports: [80] },
      action: {
        type: 'forward' as const,
        targetUrl: 'http://localhost:3000'
      }
    }]
  };
  
  const proxy = new SmartProxy(settings);
  await proxy.start();
  
  let updateStartCount = 0;
  let updateEndCount = 0;
  let maxConcurrent = 0;
  
  // Wrap updateRoutes to track concurrent execution
  const originalUpdateRoutes = proxy['updateRoutes'].bind(proxy);
  proxy['updateRoutes'] = async (routes: any[]) => {
    updateStartCount++;
    const concurrent = updateStartCount - updateEndCount;
    maxConcurrent = Math.max(maxConcurrent, concurrent);
    
    // If mutex is working, only one update should run at a time
    tools.expect(concurrent).toEqual(1);
    
    const result = await originalUpdateRoutes(routes);
    updateEndCount++;
    return result;
  };
  
  // Trigger multiple concurrent updates
  const updates = [];
  for (let i = 0; i < 5; i++) {
    updates.push(proxy.updateRoutes([
      ...settings.routes,
      {
        name: `concurrent-route-${i}`,
        match: { ports: [2000 + i] },
        action: {
          type: 'forward' as const,
          targetUrl: `http://localhost:${3000 + i}`
        }
      }
    ]));
  }
  
  await Promise.all(updates);
  
  // All updates should have completed
  tools.expect(updateStartCount).toEqual(5);
  tools.expect(updateEndCount).toEqual(5);
  tools.expect(maxConcurrent).toEqual(1); // Mutex ensures only one at a time
  
  await proxy.stop();
});

/**
 * Test that challenge route state is preserved across certificate manager recreations
 */
tap.test('should preserve challenge route state during cert manager recreation', async (tools) => {
  tools.timeout(10000);
  
  const settings = {
    port: 6003,
    routes: [{
      name: 'acme-route',
      match: { ports: [443] },
      action: {
        type: 'forward' as const,
        targetUrl: 'https://localhost:3001',
        tls: {
          mode: 'terminate' as const,
          certificate: 'auto'
        }
      }
    }],
    acme: {
      email: 'test@test.com',
      port: 80
    }
  };
  
  const proxy = new SmartProxy(settings);
  
  // Track certificate manager recreations
  let certManagerCreationCount = 0;
  const originalCreateCertManager = proxy['createCertificateManager'].bind(proxy);
  proxy['createCertificateManager'] = async (...args: any[]) => {
    certManagerCreationCount++;
    return originalCreateCertManager(...args);
  };
  
  await proxy.start();
  
  // Initial creation
  tools.expect(certManagerCreationCount).toEqual(1);
  
  // Multiple route updates
  for (let i = 0; i < 3; i++) {
    await proxy.updateRoutes([
      ...settings.routes,
      {
        name: `dynamic-route-${i}`,
        match: { ports: [9000 + i] },
        action: {
          type: 'forward' as const,
          targetUrl: `http://localhost:${5000 + i}`
        }
      }
    ]);
  }
  
  // Certificate manager should be recreated for each update
  tools.expect(certManagerCreationCount).toEqual(4); // 1 initial + 3 updates
  
  // State should be preserved (challenge route active)
  const globalState = proxy['globalChallengeRouteActive'];
  tools.expect(globalState).toBeDefined();
  
  await proxy.stop();
});

export default tap;