# syntax=docker/dockerfile:1

# ---- deps: instala dependencias (capa cacheable) ----
FROM node:22-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci

# ---- build: compila Next.js en modo standalone ----
FROM node:22-alpine AS build
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Variables NEXT_PUBLIC_* se incrustan en el bundle del cliente en build-time,
# por eso llegan como build-arg (desde docker-compose) y no solo como env de
# runtime del contenedor final.
ARG NEXT_PUBLIC_API_URL
ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
ENV NEXT_TELEMETRY_DISABLED=1

RUN npm run build

# ---- runtime: imagen final mínima (next.config.ts tiene output: "standalone") ----
FROM node:22-alpine AS runtime
WORKDIR /app
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1
ENV PORT=3000
ENV HOSTNAME=0.0.0.0

RUN addgroup -g 1001 -S nodejs && adduser -S nextjs -u 1001
USER nextjs

COPY --from=build --chown=nextjs:nodejs /app/public ./public
COPY --from=build --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=build --chown=nextjs:nodejs /app/.next/static ./.next/static

EXPOSE 3000
ENTRYPOINT ["node", "server.js"]