# Multi-stage build for Next.js
FROM node:20-alpine AS base

# Install dependencies only when needed
FROM base AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Install dependencies
COPY package.json package-lock.json* ./
RUN npm install

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Disable telemetry during the build
ENV NEXT_TELEMETRY_DISABLED 1

# 빌드 시 환경변수 설정 (ARG로 받아서 ENV로 설정)
ARG NEXT_PUBLIC_API_URL=https://api.vexplor.com
ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL

# Build the application
ENV DISABLE_ESLINT_PLUGIN=true
RUN npm run build

# Production image, copy all the files and run next
FROM base AS runner
WORKDIR /app

ENV NODE_ENV production
ENV NEXT_TELEMETRY_DISABLED 1

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy the Next.js build output
COPY --from=builder /app/public ./public

# Production 모드에서는 .next 폴더 전체를 복사
COPY --from=builder --chown=nextjs:nodejs /app/.next ./.next
COPY --from=builder --chown=nextjs:nodejs /app/package.json ./package.json

# node_modules 복사 (production dependencies)
COPY --from=deps --chown=nextjs:nodejs /app/node_modules ./node_modules

USER nextjs

EXPOSE 3000

ENV PORT 3000
ENV HOSTNAME "0.0.0.0"

# Next.js start 명령어 사용
CMD ["npm", "start"]