####
# This Dockerfile is used to build a production-ready Next.js application
####

## Stage 1: Dependencies
FROM node:20-alpine AS deps
WORKDIR /app

# Install dependencies based on the preferred package manager
COPY package.json package-lock.json* ./
RUN npm ci --only=production

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

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

COPY . .

# Build arguments for NEXT_PUBLIC variables (can be overridden at build time)
ARG NEXT_PUBLIC_API_URL=https://api.lions.dev/btpxpress
ARG NEXT_PUBLIC_KEYCLOAK_URL=https://security.lions.dev
ARG NEXT_PUBLIC_KEYCLOAK_REALM=btpxpress
ARG NEXT_PUBLIC_KEYCLOAK_CLIENT_ID=btpxpress-frontend
ARG NEXT_PUBLIC_APP_ENV=production

# Convert ARG to ENV for Next.js build process
ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
ENV NEXT_PUBLIC_KEYCLOAK_URL=${NEXT_PUBLIC_KEYCLOAK_URL}
ENV NEXT_PUBLIC_KEYCLOAK_REALM=${NEXT_PUBLIC_KEYCLOAK_REALM}
ENV NEXT_PUBLIC_KEYCLOAK_CLIENT_ID=${NEXT_PUBLIC_KEYCLOAK_CLIENT_ID}
ENV NEXT_PUBLIC_APP_ENV=${NEXT_PUBLIC_APP_ENV}

# Build Next.js application
ENV NODE_ENV=production
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

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

# Copy necessary files
COPY --from=builder /app/public ./public
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000/api/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

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