FROM python:3.11-slim

# HF Docker Space รันเป็น UID 1000 ไม่ใช่ root — ต้องสร้าง user ก่อน
RUN useradd -m -u 1000 user
USER user

ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH \
    HF_HOME=/home/user/.cache/huggingface \
    PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1

WORKDIR $HOME/app

COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# warm cache ในฐานะ user 1000 — ล้มเหลวก็ไม่พัง build
RUN python -c "from transformers import AutoTokenizer; \
    AutoTokenizer.from_pretrained('Qwen/Qwen3-30B-A3B-Instruct-2507')" \
    || echo "tokenizer warm-up skipped"

COPY --chown=user . .

EXPOSE 7860
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "1"]