FROM python:3.11-slim AS builder
WORKDIR /app
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

RUN apt-get update && apt-get install -y --no-install-recommends gcc build-essential && rm -rf /var/lib/apt/lists/*
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

COPY requirements.txt .
RUN pip install --default-timeout=100 --retries 5 --no-cache-dir -r requirements.txt

FROM python:3.11-slim AS runner
WORKDIR /app
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PATH="/opt/venv/bin:$PATH"

COPY --from=builder /opt/venv /opt/venv
COPY . /app

RUN useradd -m appuser && chown -R appuser:appuser /app
USER appuser

EXPOSE 8000
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
