# ------------------------------------
# Stage 1: Build dependencies
# ------------------------------------
FROM python:3.11-slim-bookworm AS builder

WORKDIR /build
COPY requirements.txt .

# Install dependencies to a specific directory
RUN pip install --no-cache-dir --target=/build/packages -r requirements.txt

# ------------------------------------
# Stage 2: Final distroless image
# ------------------------------------
# Using Debian 12 (Bookworm) based distroless to match builder
FROM gcr.io/distroless/python3-debian12

WORKDIR /app

# Add our packages to python path
ENV PYTHONPATH=/app/packages
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# Copy dependencies
COPY --from=builder /build/packages /app/packages

# Copy application code
COPY app.py .

# Expose port (metadata only, distroless doesn't enforce)
EXPOSE 5000

# Run app.py directly (which uses waitress with signal handling)
CMD ["app.py"]