# ---- Stage 1: build the frontend ----
FROM node:20-bookworm-slim AS frontend-build
WORKDIR /app/frontend
COPY frontend/package.json ./
RUN npm install
COPY frontend/ ./
RUN npm run build

# ---- Stage 2: backend + runtime ----
FROM node:20-bookworm-slim AS runtime
WORKDIR /app

# Native build tools needed to compile better-sqlite3, removed after install
RUN apt-get update && apt-get install -y --no-install-recommends python3 build-essential \
    && rm -rf /var/lib/apt/lists/*

COPY backend/package.json ./
RUN npm install --omit=dev

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

RUN apt-get purge -y --auto-remove python3 build-essential 2>/dev/null || true

ENV NODE_ENV=production \
    PORT=8080 \
    DATA_DIR=/data \
    FETCH_INTERVAL_MINUTES=15

VOLUME ["/data"]
EXPOSE 8080

HEALTHCHECK --interval=30s --timeout=5s --start-period=15s \
  CMD node -e "fetch('http://localhost:'+ (process.env.PORT||8080) +'/api/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"

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