from datetime import datetime, timedelta
from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from starlette.status import HTTP_401_UNAUTHORIZED

from sqlalchemy.orm import Session
from sqlalchemy import select

from passlib.context import CryptContext
from jose import JWTError, jwt

# from app.db import get_session
from app.settings import settings
from pydantic import BaseModel
from typing import List

from users.models import User

ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

# router = APIRouter()

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")

# def verify_password(plain_password, hashed_password):
#     return pwd_context.verify(plain_password, hashed_password)

# def get_password_hash(password):
#     return pwd_context.hash(password)

# def authenticate_user(username: str, password: str, db: Session):
#     statement = select(User).where(User.username == username)
#     result = db.execute(statement).fetchone()

#     if result:
#         print(result.User.__dict__)
#         if not verify_password(password, result.User.hashed_password):
#             return False

#     return result.User

# def create_access_token(data: dict, expires_delta: timedelta | None = None):
#     to_encode = data.copy()
#     if expires_delta:
#         expire = datetime.utcnow() + expires_delta
#     else:
#         expire = datetime.utcnow() + timedelta(minutes=15)
#     to_encode.update({"exp": expire})
#     encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)

#     return encoded_jwt

# async def get_current_user(token: str = Depends(oauth2_scheme)):
#     credentials_exception = HTTPException(
#             status_code=status.HTTP_401_UNAUTHORIZED,
#             detail="Could not validate credentials",
#             headers={"WWW-Authenticate": "Bearer"},
#             )
#     try:
#         payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[ALGORITHM])
#         username: str = payload.get("sub", None)
#         if username is None:
#             raise credentials_exception
#         token_data = TokenData(username=username)
#     except JWTError:
#         raise credentials_exception
#     user = get_user(username=token_data.username)
#     if user is None:
#         raise credentials_exception
#     return user

# async def get_current_active_user(current_user: User = Depends(get_current_user)):
#     if current_user.disabled:
#         raise HTTPException(status_code=400, detail="Inactive user")
#     return current_user

# @router.post("/register/", tags=["users"])
# async def register(db: Session = Depends(get_session)):
#     pass

# @router.get("/login/", tags=["users"])
# async def login(session: Session = Depends(get_session)):
#     username = "johndoe"
#     statement = select(User).where(User.username == username)
#     result = session.execute(statement).first()

#     print(result)

#     return {"hi": "there"}

# @router.post("/token", tags=["users"])
# async def login_for_access_token(form_data: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_session)):
#     user = authenticate_user(form_data.username, form_data.password, db)
#     if not user:
#         raise HTTPException(
#                 status_code=HTTP_401_UNAUTHORIZED,
#                 detail="Incorrect username or password",
#                 headers={"WWW-Authenticate": "Bearer"},
#                 )
#     access_token_expires = timedelta(minutes=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"}


class UserSchema(BaseModel):
    username: str


class UserSerializer(BaseModel):
    id: str
    username: str

    class Config:
            orm_mode = True

router = APIRouter(
    prefix="/users",
)

@router.post("/", response_model=UserSerializer)
async def create_user(user: UserSchema):
    print(user)
    print(type(user))
    user = await User.create(**user.dict())
    return user

@router.get("/{id}", response_model=UserSerializer)
async def get_user(id: str):
    user = await User.get(id)
    return user

@router.get("/", response_model=List[UserSerializer])
async def get_all_users():
    users = await User.get_all()
    return users

@router.put("/{id}", response_model=UserSerializer)
async def update(id: str, user: UserSchema):
    user = await User.update(id, **user.dict())
    return user

@router.delete("/{id}", response_model=bool)
async def delete_user(id: str):
    return await User.delete(id)