# =======================================================
# Optimized Production Dockerfile for Django Backend
# Using Debian-slim for instant pre-compiled binary wheels
# (scikit-image, numpy, scipy install in seconds vs 10m on Alpine)
# =======================================================
FROM python:3.10-slim

# Set work directory
WORKDIR /usr/src/app

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    CHROME_BIN=/usr/bin/chromium \
    CHROME_DRIVER=/usr/bin/chromedriver \
    DISPLAY=:99

# 1. System Dependencies (Cached permanently unless system packages change)
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    g++ \
    curl \
    git \
    libpq-dev \
    libjpeg62-turbo-dev \
    zlib1g-dev \
    libfreetype6-dev \
    gettext \
    ffmpeg \
    chromium \
    chromium-driver \
    && rm -rf /var/lib/apt/lists/*

# 2. Python Dependencies (Cached unless requirements.txt changes)
COPY ./requirements.txt .
RUN pip install --upgrade pip && \
    pip install -r requirements.txt

# 3. Entrypoint script (Cached)
COPY ./entrypoint.sh .
RUN sed -i 's/\r$//g' /usr/src/app/entrypoint.sh && \
    chmod +x /usr/src/app/entrypoint.sh

# 4. Application Source Code (Changes frequently on git push)
COPY . .

# Run entrypoint
ENTRYPOINT ["/usr/src/app/entrypoint.sh"]