# -*- coding: utf-8 -*-
"""
FastAPI 模块化 API 网关
前后端分离 + 模块化架构：知识图谱管理、数字人答疑、个性化推荐
"""
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from backend.config import get_settings
from backend.database import engine, Base, get_db, ensure_user_profile_columns
from backend.api.auth_router import router as auth_router
from backend.api.knowledge_router import router as knowledge_router
from backend.api.qa_router import router as qa_router
from backend.api.recommendation_router import router as recommendation_router
from backend.api.user_router import router as user_router
from backend.api.teacher_router import router as teacher_router

settings = get_settings()
app = FastAPI(title="初中化学 AI 数字人辅助教学系统", version="2.0")

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# 创建 / 升级表结构
Base.metadata.create_all(bind=engine)
ensure_user_profile_columns()

# 注册路由
app.include_router(auth_router, prefix=settings.API_V1_PREFIX)
app.include_router(knowledge_router, prefix=settings.API_V1_PREFIX)
app.include_router(qa_router, prefix=settings.API_V1_PREFIX)
app.include_router(recommendation_router, prefix=settings.API_V1_PREFIX)
app.include_router(user_router, prefix=settings.API_V1_PREFIX)
app.include_router(teacher_router, prefix=settings.API_V1_PREFIX)


@app.get("/")
def root():
    return {"message": "初中化学 AI 数字人辅助教学系统 API", "docs": "/docs"}