// test/03a_cameraPose.test.js
const { execSync } = require('child_process');
const fs = require('fs');
const path = require('path');

describe('Camera Pose Script', () => {
  const projectRoot = path.resolve(__dirname, '..');
  const scriptPath = path.resolve(projectRoot, 'programs/03a_cameraPose.py');
  const timestamp = 1778819665744;
  const screenshotDir = path.join(__dirname, 'data', 'screenShots');
  const detectionFiles = [
    'snapshot_video0_1778819665744_aruco_detection.json',
    'snapshot_video1_1778819665744_aruco_detection.json',
  ];
  const robotFile = path.resolve(projectRoot, 'test/data/robot/robot.json');
  const sceneFile = path.join(screenshotDir, `scene_${timestamp}.json`);
  const outputFile = path.join(screenshotDir, `scene_${timestamp}_cameras.json`);

  beforeEach(() => {
    detectionFiles.forEach((file) => {
      const src = path.join(screenshotDir, file);
      if (!fs.existsSync(src)) {
        throw new Error(`Missing test fixture detection file: ${src}`);
      }
    });

    if (!fs.existsSync(sceneFile)) {
      throw new Error(`Missing scene file generated by step 2: ${sceneFile}`);
    }

    if (fs.existsSync(outputFile)) {
      fs.unlinkSync(outputFile);
    }
  });

  afterEach(() => {
    // Keep the generated scene and camera JSON in the screenshot directory.
  });

  test('should exist and be executable', () => {
    expect(fs.existsSync(scriptPath)).toBe(true);
  });

  test('should have scene file', () => {
    expect(fs.existsSync(sceneFile)).toBe(true);
  });

  test('should have robot file', () => {
    expect(fs.existsSync(robotFile)).toBe(true);
  });

  test('should compute camera poses with timestamp parameter', () => {
    // Führe das Python-Skript mit den korrekten Parametern aus
    const cmd = `python "${scriptPath}" -scene "${sceneFile}" -robot "${robotFile}" -out "${outputFile}"`;
    
    try {
      execSync(cmd, { stdio: 'inherit', cwd: projectRoot });  
    } catch (error) {
      throw new Error(`Failed to compute camera poses: ${error.message}`);
    }
    // Überprüfe, ob die erwartete Ausgabedatei erstellt wurde
    expect(fs.existsSync(outputFile)).toBe(true);
    
    // Prüfe den Inhalt der JSON-Datei
    const jsonData = JSON.parse(fs.readFileSync(outputFile, 'utf8'));
    expect(jsonData).toBeDefined();
    expect(typeof jsonData).toBe('object');
    expect(jsonData).toHaveProperty('camera_poses');
  });

  test('should handle timestamp parameter correctly', () => {
    expect(timestamp).toBe(1778819665744);
  });
});