from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.api.deps import get_current_user
from app.database import get_db
from app.models.user import User
from app.schemas.auth import TokenResponse, UserLogin, UserRegister, UserResponse
from app.services.auth import authenticate_user, create_access_token, register_user

router = APIRouter()


@router.post("/register", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
async def register(user_data: UserRegister, db: AsyncSession = Depends(get_db)):
    try:
        user = await register_user(db, user_data)
    except ValueError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e) if str(e) else "邮箱已被注册")
    return user


@router.post("/login", response_model=TokenResponse)
async def login(user_data: UserLogin, db: AsyncSession = Depends(get_db)):
    user = await authenticate_user(db, user_data.email, user_data.password)
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="邮箱或密码错误",
            headers={"WWW-Authenticate": "Bearer"},
        )

    access_token = create_access_token(data={"sub": str(user.id)})
    return {
        "access_token": access_token,
        "token_type": "bearer",
        "user": user,
    }


@router.get("/me", response_model=UserResponse)
async def read_current_user(current_user: User = Depends(get_current_user)):
    return current_user