# Build stage
FROM golang:1.23-alpine AS builder

WORKDIR /app

# Install git for go mod download
RUN apk add --no-cache git

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

# Download dependencies
RUN go mod download

# Copy source code
COPY . .

# Build the application
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o billing-service ./cmd/server

# Final stage
FROM alpine:3.19

WORKDIR /app

# Install ca-certificates for HTTPS requests (Stripe API)
RUN apk --no-cache add ca-certificates tzdata

# Copy binary from builder
COPY --from=builder /app/billing-service .

# Expose port
EXPOSE 8083

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8083/health || exit 1

# Run the application
CMD ["./billing-service"]