import { expect, tap } from '@git.zone/tstest/tapbundle';
import { webrequest, WebrequestClient } from '../ts/index.js';
import { TypedServer } from '@api.global/typedserver';

let testServer: TypedServer;

// Setup test server
tap.test('setup test server for v4 tests', async () => {
  testServer = new TypedServer({
    cors: false,
    forceSsl: false,
    port: 2346,
  });

  // Route that returns JSON with cache headers
  testServer.addRoute('/cached', 'GET', async (ctx) => {
    return new Response(JSON.stringify({ data: 'cached response', timestamp: Date.now() }), {
      status: 200,
      headers: {
        'Content-Type': 'application/json',
        'Cache-Control': 'max-age=60',
        'ETag': '"12345"',
      },
    });
  });

  // Route that returns different data each time
  testServer.addRoute('/dynamic', 'GET', async (ctx) => {
    return new Response(JSON.stringify({ data: 'dynamic response', timestamp: Date.now() }), {
      status: 200,
      headers: { 'Content-Type': 'application/json' },
    });
  });

  // Route that sometimes fails (for retry testing)
  let requestCount = 0;
  testServer.addRoute('/flaky', 'GET', async (ctx) => {
    requestCount++;
    if (requestCount < 3) {
      return new Response(null, { status: 500 });
    } else {
      return new Response(JSON.stringify({ success: true, attempts: requestCount }), {
        status: 200,
        headers: { 'Content-Type': 'application/json' },
      });
    }
  });

  // Route that always fails with 500 (for fallback testing)
  testServer.addRoute('/always-fails', 'GET', async (ctx) => {
    return new Response(null, { status: 500 });
  });

  // Route that takes a long time to respond (for timeout testing)
  testServer.addRoute('/slow', 'GET', async (ctx) => {
    await new Promise((resolve) => setTimeout(resolve, 5000));
    return new Response(JSON.stringify({ data: 'slow response' }), {
      status: 200,
      headers: { 'Content-Type': 'application/json' },
    });
  });

  // Route that returns 304 when ETag matches
  testServer.addRoute('/conditional', 'GET', async (ctx) => {
    const ifNoneMatch = ctx.request.headers.get('if-none-match');
    if (ifNoneMatch === '"67890"') {
      return new Response(null, { status: 304 });
    } else {
      return new Response(JSON.stringify({ data: 'conditional response' }), {
        status: 200,
        headers: {
          'Content-Type': 'application/json',
          'ETag': '"67890"',
        },
      });
    }
  });

  // POST route for testing
  testServer.addRoute('/post', 'POST', async (ctx) => {
    return new Response(JSON.stringify({ received: true }), {
      status: 200,
      headers: { 'Content-Type': 'application/json' },
    });
  });

  await testServer.start();
});

// Test 1: Basic fetch-compatible API
tap.test('should work as fetch replacement', async () => {
  const response = await webrequest('http://localhost:2346/dynamic');
  expect(response).toBeInstanceOf(Response);
  expect(response.ok).toEqual(true);
  expect(response.status).toEqual(200);

  const data = await response.json();
  expect(data).toHaveProperty('data');
  expect(data.data).toEqual('dynamic response');
});

// Test 2: getJson convenience method with generics
tap.test('should support getJson with type safety', async () => {
  interface TestData {
    data: string;
    timestamp: number;
  }

  const data = await webrequest.getJson<TestData>('http://localhost:2346/dynamic');
  expect(data).toHaveProperty('data');
  expect(data).toHaveProperty('timestamp');
  expect(typeof data.timestamp).toEqual('number');
});

// Test 3: POST with JSON
tap.test('should support postJson', async () => {
  const data = await webrequest.postJson('http://localhost:2346/post', {
    test: 'data'
  });
  expect(data).toHaveProperty('received');
  expect(data.received).toEqual(true);
});

// Test 4: Cache strategy - network-first
tap.test('should support network-first cache strategy', async () => {
  const response1 = await webrequest('http://localhost:2346/cached', {
    cacheStrategy: 'network-first'
  });
  const data1 = await response1.json();
  expect(data1).toHaveProperty('timestamp');

  // Second request should hit network but may use cache on error
  const response2 = await webrequest('http://localhost:2346/cached', {
    cacheStrategy: 'network-first'
  });
  const data2 = await response2.json();
  expect(data2).toHaveProperty('timestamp');
});

// Test 5: Cache strategy - cache-first
tap.test('should support cache-first strategy', async () => {
  // First request goes to network
  const response1 = await webrequest('http://localhost:2346/cached', {
    cacheStrategy: 'cache-first'
  });
  const data1 = await response1.json();
  const timestamp1 = data1.timestamp;

  // Second request should use cache
  const response2 = await webrequest('http://localhost:2346/cached', {
    cacheStrategy: 'cache-first'
  });
  const data2 = await response2.json();

  // Timestamps should be identical if cached
  expect(data2.timestamp).toEqual(timestamp1);
});

// Test 6: Retry system
tap.test('should retry failed requests', async () => {
  const response = await webrequest('http://localhost:2346/flaky', {
    retry: {
      maxAttempts: 3,
      backoff: 'constant',
      initialDelay: 100
    }
  });

  const data = await response.json();
  expect(data.success).toEqual(true);
  expect(data.attempts).toBeGreaterThanOrEqual(3);
});

// Test 7: Fallback URLs
tap.test('should support fallback URLs', async () => {
  const response = await webrequest('http://localhost:2346/always-fails', {
    fallbackUrls: ['http://localhost:2346/dynamic'],
    retry: {
      maxAttempts: 2
    }
  });

  expect(response.ok).toEqual(true);
  const data = await response.json();
  expect(data).toHaveProperty('data');
});

// Test 8: Request interceptors
tap.test('should support request interceptors', async () => {
  let interceptorCalled = false;

  const response = await webrequest('http://localhost:2346/dynamic', {
    interceptors: {
      request: [(req) => {
        interceptorCalled = true;
        const headers = new Headers(req.headers);
        headers.set('X-Custom-Header', 'test');
        return new Request(req, { headers });
      }]
    }
  });

  expect(interceptorCalled).toEqual(true);
  expect(response.ok).toEqual(true);
});

// Test 9: Response interceptors
tap.test('should support response interceptors', async () => {
  let interceptorCalled = false;
  let capturedStatus: number;

  const response = await webrequest('http://localhost:2346/dynamic', {
    interceptors: {
      response: [(res) => {
        interceptorCalled = true;
        capturedStatus = res.status;
        return res;
      }]
    }
  });

  expect(interceptorCalled).toEqual(true);
  expect(capturedStatus!).toEqual(200);
});

// Test 10: Global interceptors with WebrequestClient
tap.test('should support global interceptors', async () => {
  const client = new WebrequestClient();

  let globalInterceptorCalled = false;
  client.addRequestInterceptor((req) => {
    globalInterceptorCalled = true;
    return req;
  });

  await client.request('http://localhost:2346/dynamic');
  expect(globalInterceptorCalled).toEqual(true);
});

// Test 11: Request deduplication
tap.test('should deduplicate simultaneous requests', async () => {
  // Make 3 identical requests simultaneously
  const [res1, res2, res3] = await Promise.all([
    webrequest('http://localhost:2346/dynamic', { deduplicate: true }),
    webrequest('http://localhost:2346/dynamic', { deduplicate: true }),
    webrequest('http://localhost:2346/dynamic', { deduplicate: true }),
  ]);

  const [data1, data2, data3] = await Promise.all([
    res1.json(),
    res2.json(),
    res3.json(),
  ]);

  // All should have the same timestamp (same response)
  expect(data1.timestamp).toEqual(data2.timestamp);
  expect(data2.timestamp).toEqual(data3.timestamp);
});

// Test 12: Timeout
tap.test('should support timeout', async () => {
  try {
    await webrequest('http://localhost:2346/slow', {
      timeout: 100 // 100ms timeout should fail (route takes 5000ms)
    });
    throw new Error('Should have timed out');
  } catch (error) {
    expect(error.message).toContain('timeout');
  }
});

// Test 13: WebrequestClient with default options
tap.test('should support WebrequestClient with defaults', async () => {
  const client = new WebrequestClient({
    logging: false,
    cacheStrategy: 'network-first',
    timeout: 30000
  });

  const data = await client.getJson('http://localhost:2346/dynamic');
  expect(data).toHaveProperty('data');
});

// Test 14: Clear cache
tap.test('should clear cache', async () => {
  // Cache a request
  await webrequest('http://localhost:2346/cached', {
    cacheStrategy: 'cache-first'
  });

  // Clear cache
  await webrequest.clearCache();

  // This should work even though cache is cleared
  const response = await webrequest('http://localhost:2346/cached', {
    cacheStrategy: 'cache-first'
  });
  expect(response.ok).toEqual(true);
});

// Cleanup
tap.test('stop test server', async () => {
  await testServer.stop();
});

export default tap.start();