FROM golang:1.23.2-alpine AS builder

WORKDIR /app

# Download dependencies and install required tools
COPY go.mod go.sum ./
RUN go mod download && \
    go install github.com/swaggo/swag/cmd/swag@latest

# Copy source code
COPY . .

# Install tools
RUN apk add --no-cache upx make

# Generate assets and build with optimizations
RUN set -eux; \
    cd /app; \
    make generate; \
    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
    -ldflags='-s -w -extldflags "-static"' \
    -tags netgo,osusergo \
    -o /go/bin/app

# Final stage
FROM scratch

# Copy static files and assets
COPY --from=builder /app/docs /docs
COPY --from=builder /go/bin/app /app

ENTRYPOINT ["/app"]