# ==============================
# STAGE 1 – Build das dependências
# ==============================
FROM python:3.12-slim AS builder

WORKDIR /app

# Copia apenas requirements para cache eficiente
COPY requirements.txt .

# Instala dependências necessárias apenas para build
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc libffi-dev libssl-dev python3-dev firebird-dev build-essential curl nano \
 && pip install --upgrade pip \
 && pip install --no-cache-dir --prefix=/install -r requirements.txt \
 && apt-get purge -y gcc build-essential python3-dev \
 && apt-get autoremove -y && rm -rf /var/lib/apt/lists/*

# ==============================
# STAGE 2 – Runtime (produção)
# ==============================
FROM python:3.12-slim AS runtime

# Define diretório de trabalho
WORKDIR /app

# Copia dependências instaladas do estágio builder
COPY --from=builder /install /usr/local

# Copia todo o código do projeto
COPY . .

# Define timezone e variáveis de ambiente padrão
ENV TZ=America/Sao_Paulo \
    PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    UVICORN_WORKERS=4 \
    UVICORN_PORT=8000 \
    UVICORN_HOST=0.0.0.0 \
    GUNICORN_CMD_ARGS="--log-level info --timeout 60 --graceful-timeout 30 --keep-alive 10"

# Instala utilitários para debug e health checks
RUN apt-get update && apt-get install -y --no-install-recommends curl nano \
 && rm -rf /var/lib/apt/lists/*

# Expõe a porta padrão do app
EXPOSE 8000

# ==============================
# HEALTHCHECK automático
# ==============================
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD curl -f http://localhost:8000/health || exit 1

# ==============================
# Comando de inicialização
# (Gunicorn + Uvicorn Workers)
# ==============================
CMD ["sh", "-c", "\
gunicorn main:app \
  --worker-class uvicorn.workers.UvicornWorker \
  --workers ${UVICORN_WORKERS:-4} \
  --bind ${UVICORN_HOST:-0.0.0.0}:${UVICORN_PORT:-8000} \
  --access-logfile '-' \
  --error-logfile '-' \
"]