# Build stage
FROM golang:1.21-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 -ldflags="-s -w" -o /server ./cmd/server

# Final stage - minimal image
FROM alpine:3.19

RUN apk add --no-cache ca-certificates tzdata

WORKDIR /app

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

# Create data directory
RUN mkdir -p /data

# Expose port
EXPOSE 8080

# Run as non-root user
RUN adduser -D -u 1000 appuser
RUN chown -R appuser:appuser /app /data
USER appuser

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

ENTRYPOINT ["/app/server"]
CMD ["--port", "8080", "--data", "/data"]