# Use Python 3.11 slim image for better compatibility
FROM python:3.11-slim

# Set working directory
WORKDIR /app

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

# Install system dependencies in one layer
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    curl \
    build-essential \
    libffi-dev \
    libssl-dev \
    python3-dev \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Copy requirements first for better caching
COPY requirements.txt .

# Install Python dependencies with optimizations
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# Create non-root user for security
RUN useradd -m -u 1000 streamlit && \
    chown -R streamlit:streamlit /app
USER streamlit

# Expose port (Hugging Face Spaces uses port 7860)
EXPOSE 7860

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

# Run the application
CMD ["python", "start_services.py"]