# ────────────────────────────────────────────────────────────
# NeuralVault 2.0 - Unified Multi-Stage Production Dockerfile
# Ready for Hugging Face Spaces (Docker Space) or Render/Fly.io
# ────────────────────────────────────────────────────────────

# --- STAGE 1: Build React Frontend ---
FROM node:18-slim AS frontend-builder
WORKDIR /app/frontend

# Configure production build settings to prevent OOM and bypass ESLint compatibility issues
ENV NODE_ENV=production
ENV DISABLE_ESLINT_PLUGIN=true
ENV NODE_OPTIONS="--max-old-space-size=4096"

# Copy dependencies first for caching layers
COPY frontend/package*.json ./
RUN npm install --legacy-peer-deps --include=dev


# Copy frontend source and compile React production bundle
COPY frontend/ ./
RUN npm run build



# --- STAGE 2: Serve FastAPI Backend & Static React Assets ---
FROM python:3.11-slim
WORKDIR /app

# Install system dependencies (needed for certain lock/math packages)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Copy backend requirements first and install dependencies
COPY backend/requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Copy backend codebase
COPY backend/ ./

# Inject compiled React assets directly into FastAPI's static folder
COPY --from=frontend-builder /app/frontend/build ./static

# Expose port 8000
EXPOSE 8000

# Start FastAPI server
CMD ["uvicorn", "server:app", "--host", "0.0.0.0", "--port", "8000"]