import * as path from 'path';
import * as fs from 'fs';
import * as os from 'os';

describe('CLI Integration', () => {
  const tempDir = path.join(os.tmpdir(), 'type-from-json-cli-test');

  beforeAll(() => {
    fs.mkdirSync(tempDir, { recursive: true });
  });

  afterAll(() => {
    fs.rmSync(tempDir, { recursive: true, force: true });
  });

  it('should process a JSON file and generate declaration', async () => {
    const jsonPath = path.join(tempDir, 'cli-test.json');
    const dtsPath = path.join(tempDir, 'cli-test.d.ts');

    fs.writeFileSync(jsonPath, JSON.stringify({ 
      id: 1, 
      name: 'Test User',
      active: true 
    }));

    const { readJsonFile, writeDeclarationFile } = await import('../src/file-watcher.js');
    const { TypeInferrer } = await import('../src/type-inferrer.js');
    const { DeclarationGenerator } = await import('../src/declaration-generator.js');

    const data = await readJsonFile(jsonPath);
    const inferrer = new TypeInferrer({ rootName: 'CliTest' });
    const result = inferrer.infer(data);

    const generator = new DeclarationGenerator();
    const declaration = generator.generate(result.types);

    await writeDeclarationFile(dtsPath, declaration);

    expect(fs.existsSync(dtsPath)).toBe(true);
    
    const content = fs.readFileSync(dtsPath, 'utf-8');
    expect(content).toContain('export interface CliTest');
    expect(content).toContain('id: number');
    expect(content).toContain('name: string');
    expect(content).toContain('active: boolean');
  });

  it('should handle multiple JSON samples', async () => {
    const jsonPath = path.join(tempDir, 'multi-sample.json');
    const dtsPath = path.join(tempDir, 'multi-sample.d.ts');

    fs.writeFileSync(jsonPath, JSON.stringify([
      { id: 1, status: 'active' },
      { id: 2, status: 'pending' }
    ]));

    const { readJsonFile, writeDeclarationFile } = await import('../src/file-watcher.js');
    const { extractJsonSamplesFromFile } = await import('../src/file-watcher.js');
    const { TypeInferrer } = await import('../src/type-inferrer.js');
    const { DeclarationGenerator } = await import('../src/declaration-generator.js');

    const samples = extractJsonSamplesFromFile(jsonPath);
    const inferrer = new TypeInferrer({ rootName: 'MultiSample' });
    const result = inferrer.inferFromMultiple(samples);

    const generator = new DeclarationGenerator();
    const declaration = generator.generate(result.types);

    await writeDeclarationFile(dtsPath, declaration);

    expect(fs.existsSync(dtsPath)).toBe(true);
    
    const content = fs.readFileSync(dtsPath, 'utf-8');
    expect(content).toContain('export interface MultiSample');
  });
});