# =========================================================
# Dockerfile for Hugging Face Spaces (Docker SDK)
# =========================================================
FROM python:3.10-slim

# System deps needed by faiss / sentence-transformers / reportlab
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Create a non-root user (required convention for HF Spaces)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH \
    PYTHONUNBUFFERED=1 \
    HF_HOME=/home/user/.cache/huggingface \
    TRANSFORMERS_CACHE=/home/user/.cache/huggingface

WORKDIR $HOME/app

# Install Python deps first (better layer caching)
COPY --chown=user ./requirements.txt requirements.txt
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Copy the rest of the app
COPY --chown=user . .

# Hugging Face Spaces expects the app to listen on port 7860
EXPOSE 7860

# Use gunicorn with a long timeout — first request loads the embedding model
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "1", "--threads", "2", "--timeout", "300", "app:app"]