# ──────────────────────────────────────────────
# Shortlist Frontend — Production Dockerfile
# Multi-stage build for minimal image size
# ──────────────────────────────────────────────

# Stage 1: Install dependencies
FROM node:20-alpine AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

COPY package.json package-lock.json* ./
RUN npm ci --ignore-scripts

# Stage 2: Build the application
FROM node:20-alpine AS builder
WORKDIR /app

COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Build-time env vars (public only — safe in image)
ARG NEXT_PUBLIC_API_URL
ARG NEXT_PUBLIC_SUPABASE_URL
ARG NEXT_PUBLIC_SUPABASE_ANON_KEY

ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
ENV NEXT_PUBLIC_SUPABASE_URL=${NEXT_PUBLIC_SUPABASE_URL}
ENV NEXT_PUBLIC_SUPABASE_ANON_KEY=${NEXT_PUBLIC_SUPABASE_ANON_KEY}

# Enable standalone output for minimal production image
ENV NEXT_TELEMETRY_DISABLED=1
RUN npm run build

# Stage 3: Production image
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

# Security: Run as non-root
RUN addgroup --system --gid 1001 nodejs && \
    adduser --system --uid 1001 nextjs

# Copy only what's needed for production
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

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

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