# --- Build Stage: Frontend ---
FROM node:20-alpine AS frontend-builder
WORKDIR /app/frontend
COPY frontend/package*.json ./
RUN npm install
COPY frontend/ ./
# Set production environment for build
ENV NODE_ENV=production
RUN npm run build

# --- Stage: Final Image ---
FROM python:3.11-slim
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

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

# Copy backend code
COPY backend/ ./

# Copy built frontend from previous stage to the static directory served by FastAPI
COPY --from=frontend-builder /app/frontend/out ./static

# Environment variables
ENV PORT=7860
ENV DATABASE_URL=""

# Hugging Face Spaces run on port 7860 by default
EXPOSE 7860

# Command to run the application
# We use uvicorn to run the FastAPI app, which now also serves the frontend
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]