FROM python:3.9-slim

# Create user and set up environment
RUN useradd -m -u 1000 user
USER user
ENV PATH="/home/user/.local/bin:$PATH"
ENV HF_HOME=/home/user/huggingface
WORKDIR /app

# Copy requirements first to leverage Docker cache
COPY --chown=user ./requirements.txt .
COPY --chown=user ./models ./models

# Install dependencies
RUN pip install --no-cache-dir --upgrade -r requirements.txt && \
    pip install --upgrade langchain pydantic transformers && \
    pip install -U langchain-huggingface faiss-gpu

# Copy application code
COPY --chown=user ./app.py .

EXPOSE 7860

CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860", "--reload"]