import { execSync } from 'child_process';
import fs from 'fs/promises';
import { testAgent, TestAgentResult } from '../src/services/qualimetrie/testAgent';

jest.mock('child_process', () => ({ execSync: jest.fn() }));
jest.mock('fs/promises');

describe('testAgent', () => {
  const summaryJson = JSON.stringify({ total: { lines: { pct: 90 }, functions: { pct: 80 }, branches: { pct: 70 }, statements: { pct: 60 } } });
  const jestResults = JSON.stringify({ numTotalTests: 5, numPassedTests: 4, numFailedTests: 1 });
  beforeEach(() => {
    (execSync as jest.Mock).mockClear();
    (fs.readFile as jest.Mock).mockClear();
  });

  it('should return metrics and summary on successful run', async () => {
    // Simulate execSync doing nothing
    (execSync as jest.Mock).mockImplementation(() => undefined);
    // First readFile call: coverage-summary.json
    (fs.readFile as jest.Mock)
      .mockResolvedValueOnce(summaryJson)
      .mockResolvedValueOnce(jestResults);
    const res: TestAgentResult = await testAgent();
    expect(res.success).toBe(true);
    expect(res.metrics).toEqual({ lines: 90, functions: 80, branches: 70, statements: 60 });
    expect(res.summary).toMatchObject({ total: 5, passed: 4, failed: 1 });
  });

  it('should handle execSync throwing', async () => {
    const error = new Error('fail');
    (execSync as jest.Mock).mockImplementation(() => { throw error; });
    const res: TestAgentResult = await testAgent();
    expect(res.success).toBe(false);
    expect(res.output).toContain('fail');
  });
});