# ---- Stage 1: Build frontend ----
FROM node:20-alpine AS frontend-build
WORKDIR /frontend

# 依赖层：package*.json 不变则复用 npm 缓存
COPY frontend/package*.json ./
RUN npm ci --registry=https://registry.npmmirror.com

# 源码层：业务代码变更不影响上层依赖
COPY frontend/ .
RUN npm run build

# ---- Stage 2: Python backend ----
FROM python:3.12-slim
WORKDIR /app

RUN sed -i 's|http://deb.debian.org|https://mirrors.aliyun.com|g; s|http://security.debian.org|https://mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources

# Install tini as PID 1 to properly reap orphan processes
RUN apt-get update && apt-get install -y --no-install-recommends tini && rm -rf /var/lib/apt/lists/*

# 系统依赖层：apt 包安装，缓存 deb 包避免重复下载
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
      curl \
    && rm -rf /var/lib/apt/lists/*

# Python 依赖层：requirements.txt 不变则复用 pip 缓存
COPY backend/requirements.txt .
RUN pip install --index-url https://pypi.tuna.tsinghua.edu.cn/simple \
      --trusted-host pypi.tuna.tsinghua.edu.cn \
      -r requirements.txt

# 源码层：业务代码变更不影响上面所有依赖层
COPY backend/ .

# 前端构建产物
COPY --from=frontend-build /frontend/dist ./static

RUN mkdir -p /app/data

ENV PYTHONPATH=/app
ENV DATABASE_URL=sqlite:////app/data/app.db

EXPOSE 8000

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