import {where} from "firebase/firestore";
import {useLazyLoadQueryList} from "../../hooks";
import { useAppDispatch } from "../../reduxHooks";
import { Contact, UserData } from "../../typeDefinitions";
import { addContact, deleteContact, updateContact } from "./contactsSlice";

export function useContacts({user}: {user: UserData}){
    const dispatch = useAppDispatch()
    const {items, loadMore, loadMoreIcon, reset} = useLazyLoadQueryList({path: "contacts", constraints: where("uid", "==", user?.id), number: 5});

    // const contacts = user?.product === "institutes" && user.userType === "Students" ?
    //     useInstituteStudentSelector((state) => state.contacts) :
    //     user?.product === "students" ? useStudentSelector((state) => state.contacts) : undefined;
    // const [loadMoreIcon, setLoadMoreIcon] = useState<boolean>(false);
    // const firebaseQuery = new FirebaseQuery()
    // const dispatch = user?.product === "institutes" && user.userType === "Students" ?
    // useInstituteStudentDispatch() :
    // user?.product === "students" ? useStudentDispatch() : undefined;

    // if (!dispatch || !contacts) {
    //     throw new Error("Cannot access featture.");
    // }

    // const reset = () => {
    //     dispatch(setContacts({}))
    //     dispatch(setLastContact(undefined));
    // };

    // const loadMore = async () => {
    //     setLoadMoreIcon(true);
    //     let formattedConstraints:QueryConstraint[] = [];
        
    //     if (constraints) {
    //         formattedConstraints = (Array.isArray(constraints) ? [...constraints, limit(number)] : [constraints, limit(number)]);
    //     }
    //     if (contacts.lastContact) {
    //         formattedConstraints.push(startAfter(contacts.lastContact));
    //     }
    //     const documents = await firebaseQuery.getDocsWhere("contacts", formattedConstraints, true) as QuerySnapshot<DocumentData>;
    //     const lastContact = documents.docs[documents.docs.length - 1];
    //     dispatch(setLastContact(lastContact))
    //     console.log("docs", Object.entries(documents.docs))
    //     dispatch(setContacts({
    //         ...contacts,
    //         ...Object.fromEntries(
    //           documents.docs.map(doc => [doc.id, {...doc.data(), docPath: doc.ref}])
    //         )
    //         }));
     
    //     setLoadMoreIcon(false);
    // };

    // useEffect(() => {
    //     loadMore();
    // }, []);

    const addContactForm =  async (contactForm: Contact) => {
        if (!user?.id) return
             dispatch(addContact({contactForm: contactForm, userId: user.id}))
        }

    const updateContactForm = async (contactId: string, attributes: any) => {
        dispatch(updateContact({contactId: contactId, attributes: attributes}))
    };

    const deleteContactForm = async (contactId: string) => {
        dispatch(deleteContact({contactId: contactId}))
    }


    return ({...{updateContactForm, addContactForm, deleteContactForm, contacts: items, loadMore, loadMoreIcon, reset}});

    };