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

from app.config import settings
from app.models.user import User
from app.schemas.base_response import BaseResponse
from app.schemas.user import UserCreate, Token, UserResponse
from app.services.user_service import user_service
from app.utils.auth_utils import authenticate_user, create_access_token, get_token_data

router = APIRouter()

@router.post("/signIn", response_model=BaseResponse)
async def sign_in(form_data: OAuth2PasswordRequestForm = Depends()):
    user = await user_service.get_user_by_email(form_data.username)

    if not user:
        # User not registered, create new user
        new_user = UserCreate(email=form_data.username, password=form_data.password)
        user = await user_service.create_user(new_user)

    # Authenticate user
    authenticated_user = await authenticate_user(form_data.username, form_data.password, user_service)
    if not authenticated_user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect email or password",
            headers={"WWW-Authenticate": "Bearer"},
        )

    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    access_token = create_access_token(
        data={"sub": authenticated_user["email"], "type": "bearer"},
        expires_delta=access_token_expires
    )

    # return {"access_token": access_token, "token_type": "bearer"}
    return BaseResponse(success=True, message="Sign in successfully", data={"access_token": access_token, "token_type": "bearer"})


@router.post("/register", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
async def register(user: UserCreate):
    u = await user_service.create_user(user)
    return UserResponse.from_user_in_db(u)


@router.post("/token", response_model=Token)
async def login(form_data: OAuth2PasswordRequestForm = Depends()):
    user = await authenticate_user(form_data.username, form_data.password, user_service)
    print(user)
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect email or password",
            headers={"WWW-Authenticate": "Bearer"},
        )

    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    access_token = create_access_token(
        data={"sub": user["email"], "type": "bearer"},
        expires_delta=access_token_expires
    )

    return {"access_token": access_token, "token_type": "bearer"}


@router.get("/me", response_model=UserResponse)
async def read_users_me(token_data: dict = Depends(get_token_data)):
    user = await user_service.get_user_by_email(token_data["email"])
    if not user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="User not found"
        )
    # if not user.is_active:
    #     raise HTTPException(
    #         status_code=status.HTTP_400_BAD_REQUEST,
    #         detail="Inactive user"
    #     )
    return user