FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    TIKTOKEN_CACHE_DIR=/opt/tiktoken_cache

WORKDIR /app

COPY backend/requirements.txt /tmp/requirements.txt
RUN pip install --upgrade pip -i https://pypi.tuna.tsinghua.edu.cn/simple \
    && pip install -r /tmp/requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple \
    && rm -f /tmp/requirements.txt

RUN python -c "import fastapi, uvicorn, psycopg, psycopg_pool, sqlalchemy, redis, jwt, passlib, httpx, minio, alembic; print('backend dependency check ok')"

RUN mkdir -p /opt/yg-ft/logs/backend /data/yg-ft \
    && chmod -R 0775 /opt/yg-ft /data/yg-ft

# 离线打包 tiktoken cl100k_base 词表，避免无网环境下运行时联网下载
COPY docker/app/tiktoken /opt/tiktoken_cache

EXPOSE 8000

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