# Build stage
FROM golang:1.22-alpine AS builder

WORKDIR /build

# Install dependencies
RUN apk add --no-cache git ca-certificates tzdata

# 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 GOARCH=amd64 go build -ldflags="-s -w" -o server ./cmd/server

# Runtime stage
FROM debian:bookworm-slim

# Install runtime dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    ca-certificates \
    tzdata \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Create non-root user
RUN groupadd -r app && useradd -r -g app app

WORKDIR /app

# Copy binary from builder
COPY --from=builder /build/server ./carrot_bbs
COPY --from=builder /build/configs ./configs

# Set ownership
RUN chown -R app:app /app

# Switch to non-root user
USER app

# Expose ports
EXPOSE 8080 50051

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8080/health || exit 1

# Run the binary
CMD ["./carrot_bbs"]