# Use a lightweight Python image
FROM python:3.10-slim

# Set environment variables
ENV PYTHONUNBUFFERED=1
ENV PORT=7860

# Set working directory
WORKDIR /app

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

# Copy requirements and install
# Note: requirements.txt should be in the same directory as Dockerfile (backend/)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the backend code
COPY . .

# HuggingFace Spaces uses port 7860 by default
EXPOSE 7860

# Run the FastAPI app
# We use 0.0.0.0 to allow external connections within the container
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]