# Optimized Dockerfile for Raspberry Pi Zero (ARMv6)
# Minimal memory footprint and no compilation required
# Using Python 3.11 for compatibility with Pydantic v1
FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    TZ=Europe/Berlin \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

# Install only essential runtime dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    tzdata \
    && rm -rf /var/lib/apt/lists/* \
    && ln -snf /usr/share/zoneinfo/$TZ /etc/localtime \
    && echo $TZ > /etc/timezone

# Set working directory
WORKDIR /app

# Copy requirements file first for better layer caching
COPY requirements-pizero.txt .

# Install Python dependencies one by one for better memory management on Pi Zero
# Using versions that are compatible with Python 3.11 and don't require compilation
RUN pip install --no-cache-dir --no-compile fastapi==0.95.2
RUN pip install --no-cache-dir --no-compile pydantic==1.10.9
RUN pip install --no-cache-dir --no-compile uvicorn==0.22.0
RUN pip install --no-cache-dir --no-compile httpx==0.24.1
RUN pip install --no-cache-dir --no-compile icalendar==5.0.7
RUN pip install --no-cache-dir --no-compile jinja2==3.1.2
RUN pip install --no-cache-dir --no-compile apscheduler==3.10.1
RUN pip install --no-cache-dir --no-compile pytz==2023.3
RUN pip install --no-cache-dir --no-compile python-multipart==0.0.6

# Copy application files
COPY main.py .
COPY Vektor-Logo.svg ./

# Create static directory and copy logo
RUN mkdir -p static && \
    cp Vektor-Logo.svg static/logo.svg

# Expose port
EXPOSE 8000

# Run with limited workers and basic asyncio loop for Pi Zero
# Using explicit python command to ensure correct Python version
CMD ["python3.11", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "1", "--loop", "asyncio"]