# --- Build Stage ---
FROM golang:1.22-alpine AS builder

# 安装构建依赖
RUN apk add --no-cache git ca-certificates

WORKDIR /app

# 预先下载依赖，利用 Docker 缓存层
COPY go.mod go.sum ./
RUN go mod download

# 复制源代码
COPY . .

# 编译 (CGO_ENABLED=0 静态链接，添加版本信息)
ARG VERSION=dev
ARG BUILD_TIME
RUN CGO_ENABLED=0 GOOS=linux go build \
  -ldflags="-w -s -X main.Version=${VERSION} -X main.BuildTime=${BUILD_TIME}" \
  -o chainsql ./cmd/main.go

# --- Final Stage ---
FROM alpine:3.19

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

WORKDIR /app

# 安装必要的运行时库
RUN apk add --no-cache ca-certificates tzdata && \
  update-ca-certificates

# 从 Build 阶段复制二进制文件
COPY --from=builder /app/chainsql .

# 复制配置文件
COPY --chown=chainsql:chainsql configs/ ./configs/

# 创建日志目录
RUN mkdir -p /app/logs && chown -R chainsql:chainsql /app

# 切换到非 root 用户
USER chainsql

# 暴露 HTTP API 端口
EXPOSE 8080

# 健康检查
HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:8080/health || exit 1

# 运行
CMD ["./chainsql"]