# ========== 阶段一：构建前端 dist ==========
FROM node:20-alpine AS frontend-builder

WORKDIR /app/frontend

COPY frontend/package.json frontend/package-lock.json* ./
RUN npm ci --ignore-scripts || npm install --legacy-peer-deps

COPY frontend/ ./
RUN npm run build

# ========== 阶段二：构建后端 JAR（含 dist 到 static） ==========
FROM eclipse-temurin:17-jdk-alpine AS backend-builder

WORKDIR /app

# 安装 Maven
RUN apk add --no-cache maven

COPY backend/ ./backend/
COPY --from=frontend-builder /app/frontend/dist ./backend/src/main/resources/static

WORKDIR /app/backend
RUN mvn package -DskipTests -q -B

# ========== 阶段三：运行 ==========
FROM eclipse-temurin:17-jre-alpine

WORKDIR /app

# 上传目录与数据持久化
RUN mkdir -p /app/data/uploads

COPY --from=backend-builder /app/backend/target/datatool-backend-*.jar ./app.jar

EXPOSE 8080

ENTRYPOINT ["java", "-jar", "app.jar"]