# 1. Install dependencies
FROM node:20-alpine AS deps
WORKDIR /app
COPY package*.json ./
RUN npm install

# 2. Build the application
FROM node:20-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Inject NEXT_PUBLIC_ vars at build time (required for client-side embedding)
ARG NEXT_PUBLIC_GUEST_EMAIL
ARG NEXT_PUBLIC_GUEST_PASSWORD

ENV NEXT_PUBLIC_GUEST_EMAIL=$NEXT_PUBLIC_GUEST_EMAIL
ENV NEXT_PUBLIC_GUEST_PASSWORD=$NEXT_PUBLIC_GUEST_PASSWORD

RUN npm run build

# 3. Run production image (Node.js server)
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV PORT=3002

# Create a system user for enhanced security
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy public assets and 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

# Create analytics data directory and assign proper permissions
RUN mkdir -p /app/data && chown -R nextjs:nodejs /app/data

USER nextjs

EXPOSE 3002

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