FROM golang:1.24-alpine AS build
RUN apk add --no-cache git ca-certificates protobuf-dev
WORKDIR /app

# use repo-level go.mod so modules are resolvable
COPY go.mod go.sum ./
RUN go mod download

# install Go protoc plugins
RUN go install google.golang.org/protobuf/cmd/protoc-gen-go@latest && \
    go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest

# copy service sources and proto files
COPY services/post-service ./services/post-service
COPY proto ./proto

# generate proto files
RUN mkdir -p proto/auth proto/user proto/post && \
    export PATH=/go/bin:$PATH && \
    protoc --go_out=proto --go_opt=paths=source_relative \
           --go-grpc_out=proto --go-grpc_opt=paths=source_relative \
           --proto_path=proto \
           proto/auth.proto proto/user.proto proto/post.proto && \
    ls -la proto/auth/ proto/user/ proto/post/

# build static binary
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /usr/local/bin/post-service ./services/post-service/cmd

FROM alpine:3.20
RUN apk add --no-cache ca-certificates
COPY --from=build /usr/local/bin/post-service /usr/local/bin/post-service
EXPOSE 50053
ENTRYPOINT ["/usr/local/bin/post-service"]