# Stage 1: Build frontend
FROM node:18-alpine AS frontend-builder
WORKDIR /app/frontend
COPY frontend/package*.json ./
RUN npm ci
COPY frontend/ ./
RUN npm run build

# Stage 2: Build backend
FROM python:3.11-slim AS backend

WORKDIR /app

# Set timezone to Asia/Shanghai
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# Install Python dependencies
COPY backend/requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Copy backend code
COPY backend/ ./

# Copy frontend build
COPY --from=frontend-builder /app/frontend/dist ./static

# Environment variables
ENV FLASK_CONFIG=production
ENV PYTHONUNBUFFERED=1

# Expose port
EXPOSE 5000

# Run with gunicorn (production)
CMD ["gunicorn", "-w", "4", "-b", "0.0.0.0:5000", "wsgi:app"]

# Alternative: Flask dev server (not recommended for production)
# CMD ["python", "run.py"]