# ERP Nutzfahrzeuge — Frontend Dockerfile
# Node 18 + Next.js 14.2.5 standalone build
# Multi-stage build: deps -> builder -> runner

# ============ Stage 1: Dependencies ============
FROM node:18-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci

# ============ Stage 2: Build ============
FROM node:18-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Build-time environment variables
ARG NEXT_PUBLIC_API_URL=http://localhost:8000/api/v1
ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL

RUN npm run build

# ============ Stage 3: Runner (production) ============
FROM node:18-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production

# Non-root user for security
RUN addgroup --system --gid 1001 nodejs && \
    adduser --system --uid 1001 nextjs

# Copy standalone build output
COPY --from=builder /app/public ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=5s --retries=3 --start-period=10s \
    CMD wget --no-verbose --tries=1 --spider http://127.0.0.1:3000/ || exit 1

CMD ["node", "server.js"]