// file1: utils/fs-wrapper.js
// Simple wrapper around fs.readFileSync to demonstrate the issue
import { readFileSync } from 'node:fs';

export default function readFile(path: string): string {
    return readFileSync(path, 'utf8');
}

// file2: utils/file-processor.js
// Module that depends on fs-wrapper
import readFile from './fs-wrapper.js';

export default function processFile(path: string): string {
    const content = readFile(path);
    return content.toUpperCase();
}

// file3: test/cache-issue.test.js
// Test demonstrating the ES module cache issue
import { test, describe, beforeEach, mock } from 'node:test';
import assert from 'node:assert/strict';

describe('ES Module Cache Issue with mock.restoreAll()', () => {
    beforeEach(() => {
        mock.restoreAll();
    });

    test('first test - should use mock', async (t) => {
        // Mock the fs-wrapper module
        const mockReadFile = mock.fn(() => 'mocked content from test 1');
        t.mock.module('../utils/fs-wrapper.js', {
            defaultExport: mockReadFile,
        });

        // Import the module that depends on fs-wrapper
        const fileProcessorModule = await import('../utils/file-processor.js');
        const processFile = fileProcessorModule.default;

        const result = processFile('dummy-path.txt');

        assert.strictEqual(result, 'MOCKED CONTENT FROM TEST 1');
        assert.strictEqual(mockReadFile.mock.callCount(), 1);
    });

    test('second test - should use different mock but fails due to cache', async (t) => {
        // Mock with different return value
        const mockReadFile = mock.fn(() => 'mocked content from test 2');
        t.mock.module('../utils/fs-wrapper.js', {
            defaultExport: mockReadFile,
        });

        // This import returns cached version that still references the old mock
        const fileProcessorModule = await import('../utils/file-processor.js');
        const processFile = fileProcessorModule.default;

        const result = processFile('dummy-path.txt');

        // This assertion will fail because the cached module still uses the old mock
        assert.strictEqual(result, 'MOCKED CONTENT FROM TEST 2');
        assert.strictEqual(mockReadFile.mock.callCount(), 1);
    });

    test('third test - workaround with cache busting', async (t) => {
        // Mock with third return value
        const mockReadFile = mock.fn(() => 'mocked content from test 3');
        t.mock.module('../utils/fs-wrapper.js', {
            defaultExport: mockReadFile,
        });

        // Use cache busting query parameter to force fresh import
        const fileProcessorModule = await import('../utils/file-processor.js?v=' + Date.now());
        const processFile = fileProcessorModule.default;

        const result = processFile('dummy-path.txt');

        // This assertion passes because we bypassed the cache
        assert.strictEqual(result, 'MOCKED CONTENT FROM TEST 3');
        assert.strictEqual(mockReadFile.mock.callCount(), 1);
    });
});

// Command line: node --test --experimental-test-module-mocks