# Use Python 3.11 slim image for smaller size
FROM python:3.11-slim

# Set working directory
WORKDIR /app

# Install system dependencies required for geospatial libraries
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    libgeos-dev \
    libproj-dev \
    proj-data \
    proj-bin \
    libgdal-dev \
    gdal-bin \
    libspatialindex-dev \
    && rm -rf /var/lib/apt/lists/*

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

# Install Python dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Copy application files
COPY . .

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

# Expose port
EXPOSE 8501

# Set environment variables for Streamlit
ENV STREAMLIT_SERVER_PORT=8501
ENV STREAMLIT_SERVER_ADDRESS=0.0.0.0
ENV STREAMLIT_SERVER_HEADLESS=true
ENV STREAMLIT_SERVER_ENABLE_CORS=false
ENV STREAMLIT_SERVER_ENABLE_XSRF_PROTECTION=false

# Health check
HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8501/_stcore/health || exit 1

# Run the application
CMD ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0"]