"""
用户资料API路由
"""
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from pydantic import BaseModel
from typing import List, Optional
from datetime import datetime

from backend.core.database import get_db
from backend.core.models import User
from backend.core.auth import get_current_user

router = APIRouter(tags=["users"], prefix="/users")

class UserProfileUpdate(BaseModel):
    username: Optional[str] = None
    email: Optional[str] = None
    institution: Optional[str] = None
    position: Optional[str] = None
    research_fields: Optional[List[str]] = None
    
class UserProfileResponse(BaseModel):
    id: int
    username: str
    email: str
    institution: str
    position: str
    research_fields: list
    membership_type: str
    expiry_date: Optional[str] = None
    credits: int
    
    class Config:
        orm_mode = True

@router.get("/profile", response_model=UserProfileResponse)
async def get_user_profile(current_user: User = Depends(get_current_user)):
    """获取用户资料"""
    # 规范化日期格式，确保一致性
    result = {
        "id": current_user.id,
        "username": current_user.username,
        "email": current_user.email,
        "institution": current_user.institution,
        "position": current_user.position,
        "research_fields": current_user.research_fields,
        "membership_type": current_user.membership_type,
        "expiry_date": current_user.expiry_date.strftime("%Y-%m-%d") if current_user.expiry_date else None,
        "credits": current_user.credits
    }
    return result

@router.put("/profile", response_model=UserProfileResponse)
async def update_user_profile(
    profile: UserProfileUpdate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """更新用户资料"""
    # 获取用户
    user = db.query(User).filter(User.id == current_user.id).first()
    
    # 更新用户资料
    if profile.username is not None:
        # 检查用户名是否已存在
        existing_user = db.query(User).filter(User.username == profile.username).first()
        if existing_user and existing_user.id != current_user.id:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail="用户名已被使用"
            )
        user.username = profile.username
        
    if profile.email is not None:
        # 检查邮箱是否已存在
        existing_user = db.query(User).filter(User.email == profile.email).first()
        if existing_user and existing_user.id != current_user.id:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail="邮箱已被使用"
            )
        user.email = profile.email
        
    if profile.institution is not None:
        user.institution = profile.institution
        
    if profile.position is not None:
        user.position = profile.position
        
    if profile.research_fields is not None:
        user.research_fields = profile.research_fields
    
    # 保存更新
    user.updated_at = datetime.utcnow()
    db.commit()
    db.refresh(user)
    
    # 在返回前将datetime转换为字符串
    return {
        "id": user.id,
        "username": user.username,
        "email": user.email,
        "institution": user.institution,
        "position": user.position,
        "research_fields": user.research_fields,
        "membership_type": user.membership_type,
        "expiry_date": user.expiry_date.strftime("%Y-%m-%d") if user.expiry_date else None,
        "credits": user.credits
    }