Dockerfile.cleanup

# Dockerfile for Math2Visual Cleanup Service
# This is a minimal image containing only what's needed to run the cleanup cron job

FROM python:3.12-slim

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

# Install minimal system dependencies (cron for scheduling, procps for process management)
RUN apt-get update && apt-get install -y --no-install-recommends \
    cron \
    procps \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# Create app user for security
RUN useradd -m -u 1000 appuser && \
    mkdir -p /app /app/storage/output /app/storage/temp_svgs && \
    chown -R appuser:appuser /app

# Set working directory
WORKDIR /app

# Copy minimal requirements for cleanup service
COPY --chown=appuser:appuser backend/requirements-cleanup.txt .

# Install Python dependencies as appuser
USER appuser
# Install packages one by one to handle slow/unstable network connections
# This allows Docker to cache individual packages and makes retries faster
# Using default-timeout for better handling of slow connections
RUN pip install --user --no-cache-dir --default-timeout=600 --retries=10 SQLAlchemy==2.0.43
RUN pip install --user --no-cache-dir --default-timeout=600 --retries=10 psycopg2-binary==2.9.11
RUN pip install --user --no-cache-dir --default-timeout=600 --retries=10 python-dotenv==1.0.1

# Add user's local bin to PATH
ENV PATH=/home/appuser/.local/bin:$PATH

# Switch back to root for remaining operations
USER root

# Copy only the necessary backend code (scripts and config)
# We don't need the full backend application - just the cleanup script and its dependencies
COPY --chown=appuser:appuser backend/scripts/ /app/scripts/
COPY --chown=appuser:appuser backend/app/config/ /app/app/config/
COPY --chown=appuser:appuser backend/app/utils/ /app/app/utils/
COPY --chown=appuser:appuser backend/app/models/ /app/app/models/
COPY --chown=appuser:appuser backend/app/services/tutor/session_storage.py /app/app/services/tutor/session_storage.py

# Create __init__.py files for Python package structure
RUN touch /app/app/__init__.py /app/app/services/__init__.py /app/app/services/tutor/__init__.py

# Ensure storage directories have correct permissions for appuser
RUN chown -R appuser:appuser /app/storage && \
    chmod -R 755 /app/storage

# The cleanup service will be configured and started via docker-compose command
# No CMD needed here as docker-compose will override it