import { Observer } from "../observe/Observer";
import { ActiveUserViewModel } from "../viewmodel/ActiveUserViewModel";
import { ChatModel } from "../model/ChatModel";
import log = require("loglevel");
import * as DOMPurify from "dompurify";
import { SearchService } from "../service/SearchService";
import { UserModel } from "../model/UserModel";
import { UserViewDeps } from "./UserViewDeps";

export class UserView implements Observer {

    
    private readonly _model: UserModel;
    private readonly _chatModel: ChatModel;
    private readonly _usersListElement: HTMLElement;
    private readonly _userSearchInputElement: HTMLInputElement;
    private readonly _userSearchButton: HTMLElement;
    private readonly _userSearchCancelButton: HTMLElement;
    private readonly _searchService: SearchService<ActiveUserViewModel>;
    private readonly _userContactOnlineTemplate: Handlebars.TemplateDelegate<ActiveUserViewModel>;
    private readonly _userContactOfflineTemplate: Handlebars.TemplateDelegate<ActiveUserViewModel>;

    constructor(deps: UserViewDeps) {
        this._model = deps.model;
        this._chatModel = deps.chatModel;
        this._usersListElement = deps.usersListElement;
        this._userSearchInputElement = deps.userSearchInputElement;
        this._userSearchButton = deps.userSearchButton;
        this._userSearchCancelButton = deps.userSearchCancelButton;
        this._searchService = deps.searchService;
        this._userContactOnlineTemplate = deps.userContactOnlineTemplate;
        this._userContactOfflineTemplate = deps.userContactOfflineTemplate;

        this.addSearchEventListeners();
    }

    update(data: ActiveUserViewModel[]): void {
        let html: string = "";
        data.forEach((element: ActiveUserViewModel) => {
            element.online ? html += this._userContactOnlineTemplate(element) : html += this._userContactOfflineTemplate(element);
        });
        $(this._usersListElement).html(DOMPurify.sanitize(html));
        this.addUserCallBacks();
        console.log(this._usersListElement.innerHTML);
    }

    private addSearchEventListeners(): void {
        this.addSearchButtonEL();
        this.addSearchCancelEL();
        this.addSearchInputEL();
    }

    private addUserCallBacks(): void {
        let userBoxes = document.getElementsByClassName('user-box');
        for (let i = 0; i < userBoxes.length; i++) {
            let userBox = userBoxes[i];
            userBoxes[i].addEventListener('click', this.userCallBack.bind(this, userBox));
        }
    }


    private userCallBack(el: Element): void {
        let current = document.getElementsByClassName('user-box active');

        let passphrase: string = '';
        if (current.length > 0) {
            let passphraseInput = document.getElementById('passphrase') as any;

            if (passphraseInput == null) {
                log.error('passphraseInput element reference is null');
                return;
            }
            passphrase = passphraseInput.value
            if (passphrase == '' || passphrase == null) {
                // alert('Please input passphrase')
                // alertify.error('Please enter a passphrase');
                log.error('passphrase is empty or null');
                return;
            }
            current[0].className = current[0].className.replace(" active", "");

        }
        // Add the active class to the current/clicked button
        else if (current.length == 0) {
            let elem = document.getElementById('passphrase-initial') as any;
            if (elem == null) {
                log.error('passphraseInput element reference is null');
                return;
            }
            passphrase = elem.value;
            if (passphrase == '' || passphrase == null) {
                //     // alert('Please input passphrase')
                //     // alertify.error('Please enter a passphrase');
                log.error('passphrase is empty or null');
                return;
            }
            // @ts-ignore: Object is possibly 'null'.
            document.getElementById('no-user-selected').hidden = true;
            // @ts-ignore: Object is possibly 'null'.
            document.getElementById('chat-card').hidden = false;
            // @ts-ignore: Object is possibly 'null'.
            elem.hidden = true;
        }
        // console.log(this.getElementsByClassName('to-user-span'));
        let elem = el.getElementsByClassName('to-user-span')[0] as HTMLElement;
        let userName = elem.innerText;
        // @ts-ignore: Object is possibly 'null'.
        document.getElementById('user-name-span').innerText = userName;
        this._chatModel.getmessages(userName, passphrase, null);
        // populateMessages(userName, passphrase);
        sessionStorage.setItem('selectedUser', userName);
        el.className += " active";
    }

    private addSearchButtonEL() {
        this._userSearchButton.addEventListener('submit', (e) => {
            e.preventDefault();
            // log.trace(temp);
            const searchTerm = this._userSearchInputElement.value;
            log.debug("search term value = " + searchTerm);
            const list = this._model.activeUsersList;
            log.debug("active users");
            log.debug(list);
            if (list == null) {
                log.error("Users list is null");
                return;
            }
            let searchResult = this._searchService.search(list, searchTerm);
            this.update(searchResult);
            log.debug(searchResult);
        })
    }

    private addSearchInputEL() {
        this._userSearchInputElement.addEventListener('input', (e) => {
            e.preventDefault();
            if (this._userSearchInputElement.value.length < 2) {
                log.debug("inputted")
                this._userSearchCancelButton.hidden = false;
            }
        })
    }

    private addSearchCancelEL() {
        this._userSearchCancelButton.addEventListener('click', (e) => {
            e.preventDefault();
            this._userSearchInputElement.value = "";
            this._userSearchCancelButton.hidden = true;
            let list = this._model.activeUsersList;
            // @ts-ignore
            this.update(list)
        })
    }

}