import {Injectable, Injector} from '@angular/core';
import {BehaviorSubject, firstValueFrom} from 'rxjs';
import {User} from '../models/User';
import {HttpClient, HttpHeaders} from '@angular/common/http';
import {UsersService} from './users.service';

@Injectable({
    providedIn: 'root'
})
export class AuthService {

    private authUrl = "http://localhost:8080/auth"
    private userUrl = "http://localhost:8080/users"

    private currentUser : BehaviorSubject<User | null> = new BehaviorSubject<User | null>(null);
    private apiKey: string = "";

    httpOptions2 = () => ({
        headers: new HttpHeaders({
            'Content-Type': 'application/json',
            "jelly-api-key": this.apiKey
        }),
        responseType: "text" as "json" // don't ask me how or why this works, bc i have no clue...
        // see the relevant angular bug report https://github.com/angular/angular/issues/18586
    });

    constructor(
        private http: HttpClient,
        // private userService: UsersService
        private injector: Injector
    ) {}

    async login(username: string, password: string) {
        let res = this.http.post<string>(this.authUrl, {username: username, password: password}, this.httpOptions2());
        this.apiKey = await firstValueFrom(res);
        console.log("apikey: "+this.apiKey)
        let res2 = this.http.get<User>(`${this.userUrl}/${username}`, {
            headers: new HttpHeaders({
                'Content-Type': 'application/json',
                "jelly-api-key": this.apiKey
            })
        })
        let currentU = await firstValueFrom(res2);
        this.currentUser.next(currentU);
        // this.currentUser.subscribe(r => console.log("currentUser: "+r.username))
    }

    async restoreLogin(username: string, key: string) {

        const userService = this.injector.get(UsersService);
        this.apiKey = key;
        this.currentUser.next(await firstValueFrom(userService.getUser(username)))
    }

    getCurrentUserSubject() {
        return this.currentUser;
    }

    getCurrentUser() {
        return this.currentUser.getValue()
    }

    getApiKey() {
        return this.apiKey;
    }

}