FROM node:20-alpine AS base

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

# Install dependencies based on the preferred package manager
COPY package.json package-lock.json* pnpm-lock.yaml* ./
RUN if [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm i --frozen-lockfile; \
    elif [ -f package-lock.json ]; then npm ci; \
    else npm i; fi

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

# Next.js collects completely anonymous telemetry data about general usage.
ENV NEXT_TELEMETRY_DISABLED=1

# Build-time environment variables for Next.js
ARG NEXT_PUBLIC_BASE_URL
ARG NEXT_PUBLIC_UMAMI_WEBSITE_ID
ARG NEXT_PUBLIC_UMAMI_SCRIPT_URL

ENV NEXT_PUBLIC_BASE_URL=$NEXT_PUBLIC_BASE_URL
ENV NEXT_PUBLIC_UMAMI_WEBSITE_ID=$NEXT_PUBLIC_UMAMI_WEBSITE_ID
ENV NEXT_PUBLIC_UMAMI_SCRIPT_URL=$NEXT_PUBLIC_UMAMI_SCRIPT_URL

# Build the application
RUN if [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm run build; \
    else npm run build; fi

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

# Install curl for health checks
RUN apk add --no-cache curl

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

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

COPY --from=builder /app/public ./public

# Set the correct permission for prerender cache
RUN mkdir .next
RUN chown nextjs:nodejs .next

# Automatically leverage output traces to reduce image size
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"]