# ACCESS Core — Multi-stage Dockerfile
# Build stage: install Python dependencies
# Runtime stage: minimal image with gunicorn

FROM python:3.13-slim AS base

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

WORKDIR /app

# System dependencies (PostgreSQL client, etc.)
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# ── Build Stage ──────────────────────────────────────────────────────────────

FROM base AS builder

COPY requirements.txt .
RUN pip install --prefix=/install -r requirements.txt

# ── Runtime Stage ────────────────────────────────────────────────────────────

FROM base AS runtime

# Default matches the variable contract used by infra/ (POSTGRES_*, PHI_KMS_KEY_ID).
# Compose and ECS task definitions override this per environment.
ENV DJANGO_SETTINGS_MODULE=access_core.settings.base \
    PORT=8000 \
    GUNICORN_WORKERS=4 \
    GUNICORN_THREADS=2 \
    GUNICORN_TIMEOUT=120

# Copy Python packages from builder
COPY --from=builder /install /usr/local

# Copy application code
COPY . .

# Create non-root user for security
RUN groupadd -r appuser && useradd -r -g appuser -d /app appuser \
    && chown -R appuser:appuser /app
USER appuser

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD python manage.py check --deploy || exit 1

# EXPOSE does not expand ENV vars; the runtime bind port is ${PORT} (default 8000).
EXPOSE 8000

CMD gunicorn access_core.wsgi:application \
    --bind 0.0.0.0:${PORT} \
    --workers ${GUNICORN_WORKERS} \
    --threads ${GUNICORN_THREADS} \
    --timeout ${GUNICORN_TIMEOUT} \
    --access-logfile - \
    --error-logfile -