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

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

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

    private url = "http://localhost:8080/users"
    private authUrl = "http://localhost:8080/auth"
    private httpOptions = {
        headers: new HttpHeaders({
            'Content-Type': 'application/json',
            "jelly-api-key": this.apiKey
        })
    };
    private 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
    ) {}

    async createUser(username:string, password:string) {
        await firstValueFrom(this.http.post<User>(this.url, {username: username, password: password}, this.httpOptions))
    }

    getUser(id: string): Observable<User> {
        return this.http.get<User>(`${this.url}/${id}`, this.httpOptions)
    }

    updateUser(id: number): Observable<User> {
        return this.http.put<User>(`${this.url}/${id}`, this.httpOptions)
    }

    deleteUser(id: number): Observable<boolean> {
        return this.http.delete<boolean>(`${this.url}/${id}`, this.httpOptions)
    }

    getCurrentUserSubject() {
        return this.currentUser;
    }

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

    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>(`${this.url}/${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))
    }
}