FROM python:3.11-slim

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    STREAMLIT_SERVER_PORT=7860 \
    STREAMLIT_SERVER_ADDRESS=0.0.0.0

WORKDIR /app

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

# Copy requirements first for better caching
COPY requirements.txt .
RUN pip3 install --no-cache-dir -r requirements.txt

# Copy the rest of the application
COPY . .

# Pre-download models to speed up startup and avoid runtime download issues
RUN python3 download_models.py

# Hugging Face Spaces use port 7860 by default
EXPOSE 7860

# Health check to ensure the container is running correctly
HEALTHCHECK CMD curl --fail http://localhost:7860/_stcore/health

# Run the application
ENTRYPOINT ["streamlit", "run", "multimodal_rag_langgraph_gemini_st.py"]