# 使用官方Go镜像作为构建环境
FROM golang:1.19-alpine AS builder

# 设置工作目录
WORKDIR /app

# 安装必要的包
RUN apk add --no-cache git ca-certificates tzdata

# 复制go mod文件
COPY go.mod go.sum ./

# 下载依赖
RUN go mod download

# 复制源代码
COPY . .

# 构建应用
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .

# 使用轻量级的alpine镜像作为运行环境
FROM alpine:latest

# 安装ca-certificates和tzdata
RUN apk --no-cache add ca-certificates tzdata

# 设置时区
RUN cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo "Asia/Shanghai" > /etc/timezone

# 创建非root用户
RUN addgroup -g 1001 -S appgroup && \
    adduser -u 1001 -S appuser -G appgroup

# 设置工作目录
WORKDIR /root/

# 从构建阶段复制二进制文件
COPY --from=builder /app/main .

# 复制配置文件
COPY --from=builder /app/config/config.yaml ./config/

# 创建日志目录
RUN mkdir -p /root/logs && chown -R appuser:appgroup /root

# 切换到非root用户
USER appuser

# 暴露端口
EXPOSE 8080

# 健康检查
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8080/health || exit 1

# 运行应用
CMD ["./main"]