Express.js server for AI Interviewer, providing API endpoints for generating interview questions, scoring answers, and summarizing results using Google Gemini API.

• Health Check: GET /api/health returns server status.
• Generate Questions: POST /api/gemini/generate-questions accepts { resumeText } and returns 6 AI-generated interview questions.
• Score Answers: POST /api/gemini/score-answer accepts { question, answer, timeSpent } and returns a score and feedback.
• Generate Summary: POST /api/gemini/generate-summary accepts { answers } and returns an overall score and summary.
• Circuit Breaker Pattern: Resilient to API failures with configurable thresholds.
• CORS Support: Configurable allowed origins.

• Node.js (v14 or higher)
• npm

cd backend
npm install

Create a .env file in the backend directory with:

GEMINI_API_KEY=your_google_gemini_api_key
CORS_ALLOWED_ORIGINS=http://localhost:5173
PORT=5000

• GEMINI_API_KEY: API key for Google Gemini.
• CORS_ALLOWED_ORIGINS (optional): Comma-separated list of allowed origins for CORS.
• PORT (optional): Port number (default: 5000).

npm start

The server will start on http://localhost:5000.

• GET /api/health: Check server status.
• POST /api/gemini/generate-questions
  • Request body: { resumeText: string }
  • Response: Array of question objects: { id, question, difficulty, timeLimit, expectedAnswer }.
• POST /api/gemini/score-answer
  • Request body: { question: object, answer: string, timeSpent: number }
  • Response: { score: number, feedback: string }.
• POST /api/gemini/generate-summary
  • Request body: { answers: Array }
  • Response: { score: number, summary: string }.