####
# 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 Next.js application
ENV NODE_ENV production
ENV NEXT_TELEMETRY_DISABLED 1

# Define NEXT_PUBLIC variables explicitly for build time
ENV NEXT_PUBLIC_API_URL=https://api.lions.dev/btpxpress
ENV NEXT_PUBLIC_KEYCLOAK_URL=https://security.lions.dev
ENV NEXT_PUBLIC_KEYCLOAK_REALM=btpxpress
ENV NEXT_PUBLIC_KEYCLOAK_CLIENT_ID=btpxpress-frontend
ENV NEXT_PUBLIC_APP_ENV=production

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"]