# syntax=docker/dockerfile:1.4

# ============================================
# 多阶段构建：Maven 编译 + 运行时镜像
# 使用 Docker 层缓存加速构建
# ============================================

# ============ 构建阶段 ============
FROM eclipse-temurin:17-jdk-alpine AS builder

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

WORKDIR /build

# 构建参数
ARG MODULE_NAME
ARG JAR_NAME
ARG SKIP_TESTS=true

# 复制 pom 文件（利用 Docker 层缓存）
# 先复制 pom，再下载依赖，这样依赖层可以被缓存
COPY pom.xml .
COPY viewsh-dependencies/pom.xml viewsh-dependencies/
COPY viewsh-framework/pom.xml viewsh-framework/
COPY viewsh-gateway/pom.xml viewsh-gateway/
COPY viewsh-module-system/pom.xml viewsh-module-system/
COPY viewsh-module-system/viewsh-module-system-api/pom.xml viewsh-module-system/viewsh-module-system-api/
COPY viewsh-module-system/viewsh-module-system-server/pom.xml viewsh-module-system/viewsh-module-system-server/
COPY viewsh-module-infra/pom.xml viewsh-module-infra/
COPY viewsh-module-infra/viewsh-module-infra-api/pom.xml viewsh-module-infra/viewsh-module-infra-api/
COPY viewsh-module-infra/viewsh-module-infra-server/pom.xml viewsh-module-infra/viewsh-module-infra-server/
COPY viewsh-module-iot/pom.xml viewsh-module-iot/
COPY viewsh-module-iot/viewsh-module-iot-core/pom.xml viewsh-module-iot/viewsh-module-iot-core/
COPY viewsh-module-iot/viewsh-module-iot-api/pom.xml viewsh-module-iot/viewsh-module-iot-api/
COPY viewsh-module-iot/viewsh-module-iot-server/pom.xml viewsh-module-iot/viewsh-module-iot-server/
COPY viewsh-module-iot/viewsh-module-iot-gateway/pom.xml viewsh-module-iot/viewsh-module-iot-gateway/

# 下载依赖（这一层会被缓存，除非 pom 文件变化）
RUN mvn dependency:go-offline -B -q || true

# 复制源代码（代码变化不会影响依赖层的缓存）
COPY . .

# 编译打包
RUN mvn clean package -pl ${MODULE_NAME} -am -DskipTests=${SKIP_TESTS} -B -q

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

# 安装必要工具（用于健康检查）
RUN apk add --no-cache wget curl

# 构建参数
ARG MODULE_NAME
ARG JAR_NAME
ARG APP_PORT=48080

# 元数据标签
LABEL maintainer="XW-AIOT Team"
LABEL service="${MODULE_NAME}"

# 创建非 root 用户
RUN addgroup -g 1000 appuser && \
    adduser -D -u 1000 -G appuser appuser

# 创建应用目录
RUN mkdir -p /app/logs /app/config && \
    chown -R appuser:appuser /app

WORKDIR /app

# 从构建阶段复制 JAR 文件
COPY --from=builder --chown=appuser:appuser /build/${MODULE_NAME}/target/${JAR_NAME}.jar app.jar

# 切换到非 root 用户
USER appuser

# 环境变量
ENV TZ=Asia/Shanghai \
    JAVA_OPTS="-Xms256m -Xmx512m -XX:+UseG1GC -XX:MaxGCPauseMillis=200 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/app/logs/heap-dump.hprof" \
    SPRING_PROFILES_ACTIVE=prod \
    APP_ARGS=""

# 暴露端口
EXPOSE ${APP_PORT}

# 健康检查
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:${APP_PORT}/actuator/health || exit 1

# 启动应用
ENTRYPOINT ["sh", "-c", "java ${JAVA_OPTS} -Djava.security.egd=file:/dev/./urandom -jar app.jar ${APP_ARGS}"]