# ============================================================
# 阶段1: 构建
# ============================================================
FROM golang:1.26-alpine AS builder

WORKDIR /app

# 安装构建工具
RUN apk add --no-cache git make

# 配置 Go 代理（国内加速）
ENV GOPROXY=https://goproxy.cn,https://goproxy.io,direct
ENV GOSUMDB=sum.golang.google.cn

# 复制依赖文件并下载
COPY go.mod go.sum ./
RUN go mod download && go mod verify

# 复制全部源码
COPY . .

# 编译二进制文件
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
    -ldflags="-s -w" \
    -o /app/sdk-generator \
    .

# ============================================================
# 阶段2: 运行
# ============================================================
FROM alpine:latest

# 安装运行时依赖
RUN apk add --no-cache ca-certificates tzdata

# 创建非 root 用户
RUN adduser -D -g '' appuser

# 设置时区
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

# 设置工作目录
WORKDIR /app

# 复制二进制文件
COPY --from=builder /app/sdk-generator /app/sdk-generator

# 复制静态文件（web 目录）
COPY --chown=appuser:appuser ./web /app/web

# 创建数据目录并设置权限
RUN mkdir -p /app/outputs /app/uploads && \
    chown -R appuser:appuser /app

# 切换到非 root 用户
USER appuser

# 暴露端口
EXPOSE 5002

# 健康检查
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:5002/health || exit 1

# 启动应用
ENTRYPOINT ["/app/sdk-generator"]