FROM python:3.10-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# Install supervisor and basic system dependencies just in case
RUN apt-get update && apt-get install -y supervisor libgomp1 && rm -rf /var/lib/apt/lists/*

# Create user for HuggingFace space
RUN useradd -m -u 1000 user
USER user
ENV PATH="/home/user/.local/bin:$PATH"

WORKDIR /app
COPY --chown=user:user requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Pre-download HF model to avoid file-lock hangs at runtime on HF Spaces
RUN python -c "import os; os.environ['TF_CPP_MIN_LOG_LEVEL']='3'; from transformers import pipeline; pipeline('zero-shot-classification', model='typeform/distilbert-base-uncased-mnli', framework='tf')"

# Limit TensorFlow threads to prevent CPU thrashing on Hugging Face Spaces
ENV OMP_NUM_THREADS=2
ENV TF_NUM_INTRAOP_THREADS=2
ENV TF_NUM_INTEROP_THREADS=2

# Set Hugging Face offline mode to prevent network timeouts during inference
ENV TRANSFORMERS_OFFLINE=1
ENV HF_HUB_OFFLINE=1

COPY --chown=user:user . /app

# HF Spaces run on port 7860
EXPOSE 7860

CMD ["bash", "run.sh"]