FROM python:3.9-slim

# Set working directory
WORKDIR /app

# System deps (minimal)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    curl \
    git \
    && rm -rf /var/lib/apt/lists/*

# Install Python deps first for better caching
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy app source (make sure these paths exist in your repo)
COPY app.py ./app.py
COPY src/ ./src/
COPY data/ ./data/
COPY .streamlit/ ./.streamlit/
COPY README.md ./README.md

# Streamlit defaults
ENV STREAMLIT_SERVER_HEADLESS=true
EXPOSE 8501

# Healthcheck for Streamlit
HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health || exit 1

# Run the Streamlit app (root-level app.py)
ENTRYPOINT ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0"]