# ==================== 阶段 1：构建前端 SPA ====================
FROM node:20-alpine AS ui
WORKDIR /ui
COPY ui-src/package.json ui-src/package-lock.json ./
RUN npm ci
COPY ui-src/ ./
RUN npm run build

# ==================== 阶段 2：构建后端二进制（modernc sqlite 纯 Go，无 CGO） ====================
FROM golang:1.26 AS build
WORKDIR /app
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o rag-local .

# ==================== 阶段 3：精简运行镜像 ====================
FROM alpine:3.20
WORKDIR /app
RUN apk add --no-cache tzdata && \
    adduser -D -u 1000 app && \
    mkdir -p /app/data /app/workspace && \
    chown -R app:app /app
ENV TZ=Asia/Shanghai
COPY --from=build /app/rag-local /app/rag-local
COPY --from=build /app/config.yml /app/config.yml
COPY --from=ui /ui/dist /app/ui-src/dist
USER app
EXPOSE 8080
VOLUME ["/app/data", "/app/workspace"]
ENTRYPOINT ["/app/rag-local"]