# ── Build stage: compile C extensions ──────────────────────────────────
FROM python:3.12.9-slim-bookworm AS builder

WORKDIR /build

RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.txt .
RUN pip install --no-cache-dir --prefix=/install -r requirements.txt

# ── Runtime stage: lean production image ───────────────────────────────
FROM python:3.12.9-slim-bookworm

# Create non-root user first, then copy with correct ownership (DW-2)
RUN useradd -m -u 1000 appuser

WORKDIR /app

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

# Copy application code with correct ownership — avoids redundant chown layer
COPY --chown=appuser:appuser . .

# Make entrypoint executable
RUN chmod +x entrypoint.sh

USER appuser

EXPOSE 8000

# Use entrypoint with exec so uvicorn runs as PID 1 and receives signals (DW-5)
ENTRYPOINT ["./entrypoint.sh"]