# 姜十三论坛 — 多阶段构建：Node 前端（Vike SSR）+ Go API，双服务共用镜像
# 不使用 # syntax=docker/dockerfile:1，避免构建前额外拉取 docker.io/docker/dockerfile
#
# 国内网络：默认经 DaoCloud 拉取基础镜像，npm/go 走国内代理
# 海外或已配置 Docker registry-mirrors 时可传空前缀：
#   docker build --build-arg IMAGE_PREFIX= ...
#
# 运行形态（docker compose 双容器，同一镜像两种角色）：
#   api —— Go 二进制，纯 API（:3001 内部，/data 数据卷）
#   web —— Node 渲染服务器（对外 :3000：SSR + 静态资源 + API 反代）
# 镜像默认入口为 api 角色；web 角色在 compose 中以 node 用户覆盖 entrypoint。

ARG IMAGE_PREFIX=docker.m.daocloud.io/library/
ARG VERSION=dev

# ── Stage 1: 前端构建（Vike → dist/client 静态资源 + dist/server SSR 入口）──
FROM ${IMAGE_PREFIX}node:24-bookworm-slim AS frontend
WORKDIR /src/frontend
COPY frontend/package.json frontend/package-lock.json ./
RUN npm config set registry https://registry.npmmirror.com \
    && npm ci
COPY frontend/ ./
RUN npm run build

# ── Stage 2: Go 编译（纯 Go SQLite，CGO_ENABLED=0；仅 API，无内嵌前端）─────
FROM ${IMAGE_PREFIX}golang:1.26-bookworm AS builder
ARG VERSION
ENV GOPROXY=https://goproxy.cn,direct
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 go build -trimpath \
    -ldflags "-s -w -X main.version=${VERSION}" \
    -o /out/jiang13 ./cmd/jiang13

# ── Stage 3: 运行镜像（Node 运行时承载 SSR 渲染与静态资源，附带 Go API 二进制）
FROM ${IMAGE_PREFIX}node:24-bookworm-slim
RUN apt-get update \
    && apt-get install -y --no-install-recommends gosu ca-certificates tzdata \
    && rm -rf /var/lib/apt/lists/*

ENV TZ=Asia/Shanghai \
    NODE_ENV=production

WORKDIR /app
COPY --from=builder /out/jiang13 /app/jiang13
COPY --from=frontend /src/frontend /app/frontend
COPY docker-entrypoint.sh /docker-entrypoint.sh
RUN chmod +x /app/jiang13 /docker-entrypoint.sh

# 以 root 启动，entrypoint 修正 /data 卷权限后 gosu 降权为 uid 1000（node 用户）
VOLUME ["/data"]
EXPOSE 3000 3001

HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
    CMD node -e "fetch('http://127.0.0.1:3001/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"

ENTRYPOINT ["/docker-entrypoint.sh"]
CMD ["--work-path", "/app", "--data", "/data", "--port", "3001"]