# Build stage (use build platform to keep multi-arch builds off QEMU)
FROM --platform=$BUILDPLATFORM node:20-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./
RUN npm ci

# Copy source code
COPY . .

# Build arguments for environment variables
ARG NEXT_PUBLIC_FLASK_BACKEND_URL
ARG NEXT_PUBLIC_BASE_PATH
ENV NEXT_PUBLIC_FLASK_BACKEND_URL=$NEXT_PUBLIC_FLASK_BACKEND_URL
ENV NEXT_PUBLIC_BASE_PATH=$NEXT_PUBLIC_BASE_PATH

# Build Next.js app
RUN npm run build

# Production stage
FROM node:20-alpine AS runner

WORKDIR /app

ENV NODE_ENV=production

# Copy necessary files from builder
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

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