# 编译阶段
FROM golang:1.24 AS builder

ENV CGO_ENABLED=0 \
    GOOS=linux \
    GOARCH=amd64 \
    GOPROXY=https://goproxy.cn|https://proxy.golang.google.cn|direct \
    GOSUMDB=sum.golang.google.cn

WORKDIR /src/ai-chat-backend

# 先复制依赖描述文件，最大化利用缓存
COPY go.mod go.sum ./

RUN --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    go mod download -x

# 再复制源码
COPY . .

RUN --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    go build -trimpath -ldflags="-s -w" -o /out/ai-chat-backend ./cmd

# 运行阶段
FROM alpine:3.18 AS runtime

COPY ./curl-amd64 /usr/bin/curl
RUN chmod +x /usr/bin/curl

LABEL maintainer="nick"

WORKDIR /app/

COPY ./dev.config.yaml /app/config.yaml
COPY ./www /app/www
COPY --from=builder /out/ai-chat-backend ./ai-chat-backend

ENTRYPOINT ["./ai-chat-backend"]
CMD ["--config=config.yaml"]