# ---------- deps ----------
FROM node:20-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci

# ---------- build ----------
FROM node:20-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
ENV NODE_ENV=production
# Build-time public env (baked into client bundle). You can override by rebuilding.
ARG NEXT_PUBLIC_API_BASE_URL=http://battlbuilder-api:8080
ENV NEXT_PUBLIC_API_BASE_URL=$NEXT_PUBLIC_API_BASE_URL
RUN npm run build

# ---------- runner ----------
FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production

# If you want slightly better security:
RUN addgroup -S nextjs && adduser -S nextjs -G nextjs

# Standalone output includes server + minimal node_modules
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public

USER nextjs
EXPOSE 3000
CMD ["node", "server.js"]