FROM python:3.11-slim

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PORT=7860 \
    HOME=/home/user

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

# Create user for HF Spaces (UID 1000 required)
RUN useradd -m -u 1000 user

# Set working directory
WORKDIR /home/user/app

# Copy requirements and install dependencies
COPY --chown=user:user requirements.txt .
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Copy application files
COPY --chown=user:user app.py .
COPY --chown=user:user .streamlit .streamlit/
COPY --chown=user:user README.md .

# Switch to non-root user
USER user

# Expose port
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/_stcore/health || exit 1

# Run Streamlit
CMD ["streamlit", "run", "app.py", \
    "--server.port=7860", \
    "--server.address=0.0.0.0", \
    "--server.headless=true", \
    "--browser.gatherUsageStats=false", \
    "--server.enableCORS=false", \
    "--server.enableXsrfProtection=false"]