# Base image with system dependencies + Python packages.
# These change rarely — build once, reuse on every --no-cache.
#
# Rebuild manually when requirements.txt or system deps change:
#   docker build -f klausur-service/Dockerfile.base -t klausur-base:latest klausur-service/
#
FROM python:3.11-slim

WORKDIR /app

# System dependencies (Tesseract OCR, curl for healthcheck)
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    tesseract-ocr \
    tesseract-ocr-deu \
    tesseract-ocr-eng \
    libgl1 \
    libglib2.0-0 \
    fonts-liberation \
    && rm -rf /var/lib/apt/lists/*

# Python dependencies
COPY backend/requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Clean up pip cache
RUN rm -rf /root/.cache/pip