FROM python:3.11-slim

ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    OMP_NUM_THREADS=2 \
    TOKENIZERS_PARALLELISM=false \
    TORCH_HOME=/data/models

# tesseract-ocr + pacote de idioma português + libs de imagem do MuPDF
RUN apt-get update && apt-get install -y --no-install-recommends \
        tesseract-ocr \
        tesseract-ocr-por \
        tesseract-ocr-eng \
        curl \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# PyTorch só com CPU: o wheel padrão traz ~4 GB de bibliotecas CUDA, inúteis aqui.
RUN pip install --no-cache-dir \
        --index-url https://download.pytorch.org/whl/cpu \
        "torch==2.5.1"

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

COPY app ./app
COPY tests ./tests

RUN mkdir -p /data/vector_db /data/pdfs /data/models

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
    CMD curl -fsS http://localhost:8000/api/health || exit 1

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