FROM python:3.11-slim

# Set working directory
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first (for Docker layer caching)
COPY requirements.txt .

# Install Python dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Copy all backend code
COPY . .

# Set Python path so imports resolve correctly
ENV PYTHONPATH=/app

# Download NLTK data at build time
RUN python -c "import nltk; nltk.download('punkt'); nltk.download('punkt_tab')"

# HuggingFace Spaces uses port 7860
EXPOSE 7860

# Start the API
CMD ["uvicorn", "api.main:app", "--host", "0.0.0.0", "--port", "7860"]