ARG POSTHOG_HOST=https://app.posthog.com
ARG POSTHOG_API_KEY=posthog-api-key

FROM  node:16-alpine AS base

FROM base AS frontend-dependencies

# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
RUN apk add --no-cache libc6-compat

WORKDIR /app

COPY frontend/package.json frontend/package-lock.json frontend/next.config.js ./

# Install dependencies
RUN npm ci --only-production --ignore-scripts

# Rebuild the source code only when needed
FROM base AS frontend-builder
WORKDIR /app

# Copy dependencies
COPY --from=frontend-dependencies /app/node_modules ./node_modules
# Copy all files 
COPY /frontend .

ENV NODE_ENV production
ENV NEXT_PUBLIC_ENV production
ARG POSTHOG_HOST
ENV NEXT_PUBLIC_POSTHOG_HOST $POSTHOG_HOST
ARG POSTHOG_API_KEY
ENV NEXT_PUBLIC_POSTHOG_API_KEY $POSTHOG_API_KEY
ARG INTERCOM_ID
ENV NEXT_PUBLIC_INTERCOM_ID $INTERCOM_ID

# Build
RUN npm run build

# Production image
FROM base AS frontend-runner
WORKDIR /app

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

RUN mkdir -p /app/.next/cache/images && chown nextjs:nodejs /app/.next/cache/images
VOLUME /app/.next/cache/images

ARG POSTHOG_API_KEY
ENV NEXT_PUBLIC_POSTHOG_API_KEY=$POSTHOG_API_KEY \
  BAKED_NEXT_PUBLIC_POSTHOG_API_KEY=$POSTHOG_API_KEY
ARG INTERCOM_ID
ENV NEXT_PUBLIC_INTERCOM_ID=$INTERCOM_ID \
  BAKED_NEXT_PUBLIC_INTERCOM_ID=$INTERCOM_ID

COPY --chown=nextjs:nodejs --chmod=555 frontend/scripts ./scripts
COPY --from=frontend-builder /app/public ./public
RUN chown nextjs:nodejs ./public/data
COPY --from=frontend-builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=frontend-builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

ENV NEXT_TELEMETRY_DISABLED 1

##
## BACKEND
##
FROM base AS backend-build

WORKDIR /app

COPY backend/package*.json ./
RUN npm ci --only-production

COPY /backend .
RUN npm run build

# Production stage
FROM base AS backend-runner

WORKDIR /app

COPY backend/package*.json ./
RUN npm ci --only-production

COPY --from=backend-build /app .

RUN mkdir frontend-build

# Production stage
FROM base AS production

WORKDIR / 

COPY --from=backend-runner /app /backend

COPY --from=frontend-runner /app ./backend/frontend-build

EXPOSE 80

ENV PORT 80
ENV HTTPS_ENABLED false 
ENV NODE_ENV production

WORKDIR /backend

CMD ["node", "build/index.js"]