from datetime import timedelta
from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from sqlalchemy.orm import Session
import os
from app.config import settings
from app.database.database import get_db
from app.models.user import User
from app.schemas.auth import Token
from app.common.utils import verify_password, create_access_token

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


@router.post("/login", response_model=Token)
def login(form_data: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_db)):
    """用户登录"""
    user = db.query(User).filter(User.username == form_data.username).first()
    
    # 密码验证：比较用户存储的密码
    if not user or form_data.password != user.password:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password",
            headers={"WWW-Authenticate": "Bearer"},
        )
    
    access_token_expires = timedelta(minutes=settings.access_token_expire_minutes)
    access_token = create_access_token(
        data={"sub": user.username}, expires_delta=access_token_expires
    )
    return {"access_token": access_token, "token_type": "bearer"}