FROM python:3.13.5-slim

WORKDIR /app

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

# Create writable cache dir for Hugging Face
RUN mkdir -p /app/hf_cache && chmod -R 777 /app/hf_cache
ENV HF_HOME=/app/hf_cache
ENV TRANSFORMERS_CACHE=/app/hf_cache

# Copy requirements and install
COPY requirements.txt ./
RUN pip3 install --no-cache-dir -r requirements.txt

# Pre-download the SentenceTransformer model to avoid runtime PermissionError
RUN python3 -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('sentence-transformers/all-MiniLM-L6-v2', cache_folder='/app/hf_cache')"

# Copy app source code
COPY src/ ./src/

EXPOSE 8501

HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health || exit 1

ENTRYPOINT ["streamlit", "run", "src/streamlit_app.py", "--server.port=8501", "--server.address=0.0.0.0"]