FROM python:3.11-slim

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Copy and install Python dependencies first (layer caching)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# Set PYTHONPATH so all imports resolve correctly
ENV PYTHONPATH=/app

# HF Spaces uses port 7860 (NOT 8000)
EXPOSE 7860

# Health check — judges will ping this
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Correct module path: server/app.py, not api/main.py
CMD ["uvicorn", "server.app:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "1"]