"""
AmazingData 数据服务平台 - 认证 API
"""

from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from sqlalchemy.orm import Session
from datetime import datetime
from backend.models.database import get_db
from backend.models.tables import User
from backend.models.schemas import LoginRequest, LoginResponse, UserInfo, BaseResponse
from backend.auth.jwt_handler import verify_password, create_access_token
from backend.auth.dependencies import get_current_active_user

router = APIRouter()


@router.post("/login", response_model=LoginResponse)
async 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()
    
    if not user or not verify_password(form_data.password, user.password_hash):
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password",
            headers={"WWW-Authenticate": "Bearer"},
        )
    
    if not user.is_active:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Inactive user")
    
    # 更新最后登录时间
    user.last_login = datetime.utcnow()
    db.commit()
    
    # 创建 Token
    access_token = create_access_token(data={"sub": user.username, "role": user.role})
    
    return LoginResponse(
        access_token=access_token,
        token_type="bearer",
        user_info={
            "id": user.id,
            "username": user.username,
            "role": user.role,
            "is_active": user.is_active,
            "last_login": user.last_login
        }
    )


@router.post("/login-json", response_model=LoginResponse)
async def login_json(request: LoginRequest, db: Session = Depends(get_db)):
    """用户登录（JSON 格式）"""
    user = db.query(User).filter(User.username == request.username).first()
    
    if not user or not verify_password(request.password, user.password_hash):
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password"
        )
    
    if not user.is_active:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Inactive user")
    
    user.last_login = datetime.utcnow()
    db.commit()
    
    access_token = create_access_token(data={"sub": user.username, "role": user.role})
    
    return LoginResponse(
        access_token=access_token,
        token_type="bearer",
        user_info={
            "id": user.id,
            "username": user.username,
            "role": user.role,
            "is_active": user.is_active,
            "last_login": user.last_login
        }
    )


@router.get("/me", response_model=BaseResponse)
async def get_current_user_info(current_user: User = Depends(get_current_active_user)):
    """获取当前用户信息"""
    return BaseResponse(
        data={
            "id": current_user.id,
            "username": current_user.username,
            "role": current_user.role,
            "is_active": current_user.is_active,
            "last_login": current_user.last_login
        }
    )


@router.post("/logout", response_model=BaseResponse)
async def logout(current_user: User = Depends(get_current_active_user)):
    """用户登出"""
    return BaseResponse(message="Logout successful")