# Dockerfile
FROM python:3.12-slim AS builder

# 设置环境变量
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

WORKDIR /app

# 安装系统依赖（faiss-cpu 编译需要）
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    g++ \
    libopenblas-dev \
    libomp-dev \
    && rm -rf /var/lib/apt/lists/*

# 复制依赖文件并安装
COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# 最终镜像
FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

WORKDIR /app

# 运行时需要的系统库
RUN apt-get update && apt-get install -y --no-install-recommends \
    libopenblas-dev \
    libomp-dev \
    && rm -rf /var/lib/apt/lists/*

# 从 builder 复制已安装的 Python 包
COPY --from=builder /usr/local/lib/python3.12/site-packages /usr/local/lib/python3.12/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

# 复制项目代码
COPY . .

# 暴露端口
EXPOSE 8000

# 启动命令（使用字符串路径，兼容 reload）
CMD ["uvicorn", "api:app", "--host", "0.0.0.0", "--port", "8000"]