# syntax=docker/dockerfile:1

# ===== STAGE 1: Builder =====
FROM python:3.11-slim AS builder

WORKDIR /build

# Instala dependências em virtualenv isolado
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

COPY requirements.txt .

# Cache de pip para builds mais rápidas
RUN --mount=type=cache,target=/root/.cache/pip \
    pip install --upgrade pip && \
    pip install -r requirements.txt

# ===== STAGE 2: Production (Distroless) =====
FROM gcr.io/distroless/python3-debian12:nonroot

# Variáveis de ambiente Python otimizadas
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH="/opt/venv/lib/python3.11/site-packages"

WORKDIR /app

# Copia virtualenv do builder (apenas site-packages pois distroless já tem python)
COPY --from=builder /opt/venv/lib/python3.11/site-packages /opt/venv/lib/python3.11/site-packages

# Copia código fonte
COPY src ./src

EXPOSE 8000

# Uvicorn com workers otimizados
CMD ["/opt/venv/lib/python3.11/site-packages/bin/uvicorn", "src.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "1"]