FROM python:3.10-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    STREAMLIT_SERVER_HEADLESS=true \
    STREAMLIT_BROWSER_GATHERUSAGESTATS=false

WORKDIR /app

# Install Python dependencies
COPY requirements.txt .
RUN python -m pip install --upgrade pip && \
    pip install -r requirements.txt

# Copy app code
COPY . .

# Start Streamlit on the port provided by HF Spaces (fallback to 7860)
# Also unset STREAMLIT_SERVER_PORT to avoid empty env var issues
CMD ["bash", "-lc", "unset STREAMLIT_SERVER_PORT; exec streamlit run main.py --server.address=0.0.0.0 --server.port=${PORT:-7860}"]