# --- Frontend Build Stage ---
FROM node:20-slim AS frontend-builder
WORKDIR /app/frontend
COPY frontend/package*.json ./
RUN npm install
COPY frontend/ ./
RUN npm run build

# --- Final Image Stage ---
FROM python:3.10-slim
WORKDIR /app

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

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

# Copy the rest of the application
COPY . .

# Copy the built frontend from the builder stage
COPY --from=frontend-builder /app/frontend/dist ./frontend/dist

# Expose port 7860 (Hugging Face default)
EXPOSE 7860

# Command to run the application
# We run from the backend directory to ensure app:app pathing is correct
CMD ["python", "backend/app.py"]