# ── NEXUS AI — Hugging Face Spaces Dockerfile ──────────────────────────────
FROM node:20 AS builder

WORKDIR /app

# Copy package.json and install all dependencies
COPY nexus/package.json ./
RUN npm install

# Copy source code
COPY nexus/ ./

# Build frontend (Vite → dist/public) + backend (esbuild → dist/index.cjs)
RUN npm run build

# ── Production stage ──────────────────────────────────────────────────────────
FROM node:20-slim

# better-sqlite3 needs native build tools
RUN apt-get update && apt-get install -y --no-install-recommends \
    python3 make g++ \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Copy package.json and install production deps only
COPY nexus/package.json ./
RUN npm install --omit=dev

# Copy built artifacts from builder
COPY --from=builder /app/dist ./dist

# node:20-slim already has user 'node' with uid 1000 (required by HF Spaces)
RUN chown -R node:node /app
USER node

# HF Spaces exposes port 7860
ENV PORT=7860
ENV NODE_ENV=production

EXPOSE 7860

CMD ["node", "dist/index.cjs"]