from apiflask import APIBlueprint
from flask import send_from_directory, current_app
import os

bp = APIBlueprint("front", __name__, tag="前端")

def _get_frontend_path():
    return os.path.join(current_app.static_folder, current_app.config.get("FRONTEND_PATH", ""))

@bp.get("/")
def index():
    """渲染前端 SPA 入口页面"""
    return send_from_directory(_get_frontend_path(), "index.html")

@bp.get('/<path:fallback>')
def fallback(fallback):
    """兜底: 避免history模式下的影响"""
    frontend_path = _get_frontend_path()
    if not os.path.exists(os.path.join(frontend_path, fallback)):
        return send_from_directory(frontend_path, 'index.html')
    else:
        return send_from_directory(frontend_path, fallback)