FROM python:3.10-slim

# Set timezone and noninteractive to avoid prompts during apt-get
ENV DEBIAN_FRONTEND=noninteractive
ENV TZ=UTC

# Install system dependencies if required for some python packages
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

# Install dependencies (CPU versions of torch are much smaller and better for free tier)
RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

# Create a non-root user (Required for Hugging Face Spaces)
RUN useradd -m -u 1000 user
USER user

ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

WORKDIR $HOME/app

COPY --chown=user . $HOME/app

# Hugging Face Spaces expose port 7860
CMD ["uvicorn", "backend_api:app", "--host", "0.0.0.0", "--port", "7860"]