# Stage 1: Build the Go Binary
FROM golang:1.21 as builder

WORKDIR /app

# 1. Copy ALL files first (including main.go)
# We do this so 'go mod tidy' can see the imports in main.go
COPY . .

# 2. Generate go.sum and download dependencies
RUN go mod tidy

# 3. Build the binary named "server"
RUN CGO_ENABLED=0 GOOS=linux go build -o server main.go

# Stage 2: Run the Binary (Small Image)
FROM alpine:latest

WORKDIR /app

# Install CA certificates for HTTPS calls
RUN apk --no-cache add ca-certificates

# Create a non-root user (Required by HF Spaces)
RUN adduser -D -u 1000 user
USER user

# Copy the binary from builder
COPY --from=builder /app/server .

# Expose HF Port
EXPOSE 7860

# Run
CMD ["./server"]