# ===================================================================
# Stage 1: Builder - Install dependencies
# ===================================================================
FROM python:3.12-slim-bookworm AS builder

# Install build dependencies for mysqlclient and other packages
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    default-libmysqlclient-dev \
    pkg-config \
    && rm -rf /var/lib/apt/lists/*

# Install Python dependencies
COPY requirements.txt /tmp/
RUN pip install --user --no-cache-dir -r /tmp/requirements.txt \
    && pip install --user --no-cache-dir mysqlclient gunicorn

# ===================================================================
# Stage 2: Runtime - Minimal production image
# ===================================================================
FROM python:3.12-slim-bookworm

# Install runtime dependencies only
RUN apt-get update && apt-get install -y --no-install-recommends \
    default-mysql-client \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Create django user (non-root for security)
RUN useradd -m -u 1000 -s /bin/bash django

# Set working directory
WORKDIR /app

# Copy Python dependencies from builder stage
COPY --from=builder /root/.local /home/django/.local

# Copy application code
COPY --chown=django:django . /app/

# Create directories for media and static files
RUN mkdir -p /app/media /app/staticfiles && \
    chown -R django:django /app/media /app/staticfiles

# Switch to django user
USER django

# Add .local/bin to PATH for installed packages
ENV PATH=/home/django/.local/bin:$PATH

# Set Python to run in unbuffered mode (better for Docker logs)
ENV PYTHONUNBUFFERED=1

# Expose port 8000 for Gunicorn
EXPOSE 8000

# Health check - ping the API endpoint
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD curl -f http://localhost:8000/api/ || exit 1

# Entrypoint script handles migrations, static collection, and service startup
ENTRYPOINT ["/app/docker/entrypoint.sh"]

# Default command is to run Gunicorn
CMD ["gunicorn"]