from fastapi import APIRouter, Depends, Response
from sqlalchemy.orm import Session
from app.models.database import get_db
from app.models.user import UserInfo,UserDB, PhoneLoginRequest, generate_user_code
from app.core.response import success_response, error_response, ResponseModel
from app.core.wechat import WeChatClient
from app.core.security import create_access_token, set_jwt_cookie
from pydantic import BaseModel

router = APIRouter()

class PhoneNumberRequest(BaseModel):
    code: str  # 手机号获取凭证
    referral_code: str = None  # 推荐码（可选）

@router.post("/phone-login", response_model=ResponseModel)
async def wechat_phone_login(
    request: PhoneNumberRequest,
    db: Session = Depends(get_db),
    response: Response = None
):
    """通过微信手机号登录/注册"""
    try:
        # 初始化微信客户端
        wechat = WeChatClient()
        
        # 获取用户手机号
        phone_info = await wechat.get_phone_number(request.code)
        
        if not phone_info or not phone_info.get('phone_number'):
            return error_response(code=400, message="获取手机号失败")
        
        phone = phone_info['phone_number']
        
        # 查找或创建用户
        user = db.query(UserDB).filter(UserDB.phone == phone).first()
        if not user:
            # 生成用户编码
            user_code = generate_user_code(db)
            
            user = UserDB(
                username=f"user_{phone[-4:]}",
                phone=phone,
                user_code=user_code,
                referral_code=request.referral_code
            )
            db.add(user)
            db.flush()  # 获取用户ID
            
            # 发放优惠券
            from app.api.endpoints.user import issue_register_coupons
            issue_register_coupons(db, user.userid)
            
            db.commit()
            db.refresh(user)
        
        # 创建访问令牌
        access_token = create_access_token(
            data={"phone": user.phone, "userid": user.userid}
        )
        
        # 设置JWT cookie
        if response:
            set_jwt_cookie(response, access_token)
        
        return success_response(
            message="登录成功",
            data={
                "user": UserInfo.model_validate(user),
                "access_token": access_token,
                "token_type": "bearer"
            }
        )
    except Exception as e:
        db.rollback()
        return error_response(code=500, message=f"登录失败: {str(e)}")