# Use Debian-based Python 3.13 slim image
FROM python:3.13-slim-bookworm

# Set working directory
WORKDIR /app

# Install system dependencies for rrdtool
RUN apt-get update && apt-get install -y \
    rrdtool \
    librrd-dev \
    build-essential \
    python3-dev \
    wget \
    && 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 --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Remove build dependencies to reduce image size
RUN apt-get purge -y build-essential python3-dev && \
    apt-get autoremove -y && \
    apt-get clean

# Copy application code
COPY app/ ./app/

# Create directory for RRD data
RUN mkdir -p /app/data

# Expose port
EXPOSE 8000

# Create non-root user for security
RUN useradd --create-home --shell /bin/bash appuser && \
    chown -R appuser:appuser /app
USER appuser

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8000/health || exit 1

# Run the application
CMD ["python", "-m", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]