import { afterAll, beforeAll, describe, expect, test } from 'bun:test';
import { HttpClient, HttpError } from '../src/index';
import { MockServer } from './mock-server';

/**
 * Integration tests for HTTP client with real network scenarios
 * These tests use external services and may be affected by network conditions
 */

let mockServer: MockServer;
let mockServerBaseUrl: string;

beforeAll(async () => {
  mockServer = new MockServer();
  await mockServer.start();
  mockServerBaseUrl = mockServer.getBaseUrl();
});

afterAll(async () => {
  await mockServer.stop();
});

describe('HTTP Integration Tests', () => {
  let client: HttpClient;

  beforeAll(() => {
    client = new HttpClient({
      timeout: 10000,
    });
  });

  describe('Real-world scenarios', () => {
    test('should handle JSON API responses', async () => {
      try {
        const response = await client.get('https://jsonplaceholder.typicode.com/posts/1');

        expect(response.status).toBe(200);
        expect(response.data).toHaveProperty('id');
        expect(response.data).toHaveProperty('title');
        expect(response.data).toHaveProperty('body');
      } catch (error) {
        console.warn('External API test skipped due to network issues:', (error as Error).message);
      }
    });

    test('should handle large responses', async () => {
      try {
        const response = await client.get('https://jsonplaceholder.typicode.com/posts');

        expect(response.status).toBe(200);
        expect(Array.isArray(response.data)).toBe(true);
        expect(response.data.length).toBeGreaterThan(0);
      } catch (error) {
        console.warn(
          'Large response test skipped due to network issues:',
          (error as Error).message
        );
      }
    });

    test('should handle POST with JSON data', async () => {
      try {
        const postData = {
          title: 'Integration Test Post',
          body: 'This is a test post from integration tests',
          userId: 1,
        };

        const response = await client.post('https://jsonplaceholder.typicode.com/posts', postData);

        expect(response.status).toBe(201);
        expect(response.data).toHaveProperty('id');
        expect(response.data.title).toBe(postData.title);
      } catch (error) {
        console.warn(
          'POST integration test skipped due to network issues:',
          (error as Error).message
        );
      }
    });
  });

  describe('Error scenarios with mock server', () => {
    test('should handle various HTTP status codes', async () => {
      const successCodes = [200, 201];
      const errorCodes = [400, 401, 403, 404, 500, 503];

      // Test success codes
      for (const statusCode of successCodes) {
        const response = await client.get(`${mockServerBaseUrl}/status/${statusCode}`);
        expect(response.status).toBe(statusCode);
      }

      // Test error codes (should throw HttpError)
      for (const statusCode of errorCodes) {
        await expect(client.get(`${mockServerBaseUrl}/status/${statusCode}`)).rejects.toThrow(
          HttpError
        );
      }
    });

    test('should handle malformed responses gracefully', async () => {
      // Mock server returns valid JSON, so this test verifies our client handles it properly
      const response = await client.get(`${mockServerBaseUrl}/`);
      expect(response.status).toBe(200);
      expect(typeof response.data).toBe('object');
    });

    test('should handle concurrent requests', async () => {
      const requests = Array.from({ length: 5 }, (_, i) =>
        client.get(`${mockServerBaseUrl}/`, {
          headers: { 'X-Request-ID': `req-${i}` },
        })
      );

      const responses = await Promise.all(requests);

      responses.forEach((response, index) => {
        expect(response.status).toBe(200);
        expect(response.data.headers).toHaveProperty('x-request-id', `req-${index}`);
      });
    });
  });

  describe('Performance and reliability', () => {
    test('should handle rapid sequential requests', async () => {
      const startTime = Date.now();
      const requests = [];

      for (let i = 0; i < 10; i++) {
        requests.push(client.get(`${mockServerBaseUrl}/`));
      }

      const responses = await Promise.all(requests);
      const endTime = Date.now();

      expect(responses).toHaveLength(10);
      responses.forEach(response => {
        expect(response.status).toBe(200);
      });

      console.log(`Completed 10 requests in ${endTime - startTime}ms`);
    });

    test('should maintain connection efficiency', async () => {
      const clientWithKeepAlive = new HttpClient({
        timeout: 5000,
      });

      const requests = Array.from({ length: 3 }, () =>
        clientWithKeepAlive.get(`${mockServerBaseUrl}/`)
      );

      const responses = await Promise.all(requests);

      responses.forEach(response => {
        expect(response.status).toBe(200);
      });
    });
  });
});