# Build stage
FROM golang:1.22-alpine AS builder

WORKDIR /app

# Install dependencies
RUN apk add --no-cache git

# Copy go mod files
COPY go.mod go.sum* ./
RUN go mod download

# Copy source code
COPY . .

# Build binary
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o api-gateway .

# Runtime stage
FROM alpine:3.19

WORKDIR /app

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

# Copy binary from builder
COPY --from=builder /app/api-gateway .

# Create non-root user
RUN adduser -D -g '' appuser
USER appuser

# Expose port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:8080/health || exit 1

# Run
CMD ["./api-gateway"]