# Production Dockerfile for Frontend
# Multi-stage build with Next.js standalone output

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

COPY package*.json ./
RUN npm ci --only=production

# Stage 2: Builder
FROM node:20-alpine AS builder
WORKDIR /app

COPY package*.json ./
COPY tsconfig.json ./
COPY tailwind.config.ts ./
COPY next.config.js ./
RUN npm ci

COPY src ./src
RUN mkdir -p public
COPY public* ./public/ 2>/dev/null || true

# Build arguments
ARG NEXT_PUBLIC_API_URL
ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}

RUN npm run build

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

ENV NODE_ENV=production
ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

# Create non-root user
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy standalone output
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
RUN mkdir -p public
COPY --from=builder --chown=nextjs:nodejs /app/public/* ./public/ 2>/dev/null || true

USER nextjs

EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=30s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000/login', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

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