import {Injectable} from '@angular/core';
import {Subject, Subscription, BehaviorSubject, Observable} from 'rxjs';
import {HttpClient, HttpParams} from '@angular/common/http';
import {UserService} from './user.service';

//import {User} from './user.model';

@Injectable({providedIn: 'root'})
export class FullnodeService{
	beUrl = 'http://localhost:3000/';
	private dataStore: { height: number, memoList: string[], addr: string, price: number } = { height: 0, memoList: [], addr: '', price:0 };
	private _heightUpdated: BehaviorSubject<number> = new BehaviorSubject(this.dataStore.height);
	private _memoUpdated: BehaviorSubject<string[]> = new BehaviorSubject(this.dataStore.memoList);
	private _addrUpdated: BehaviorSubject<string> = new BehaviorSubject(this.dataStore.addr);
	private _priceUpdated: BehaviorSubject<number> = new BehaviorSubject(this.dataStore.price);
	public readonly addrUpdate: Observable<string> = this._addrUpdated.asObservable();
	public readonly heightUpdate: Observable<number> = this._heightUpdated.asObservable();
	public readonly memoUpdate: Observable<string[]> = this._memoUpdated.asObservable();
	public readonly priceUpdate: Observable<number> = this._priceUpdated.asObservable();
	private UserSub: Subscription = new Subscription();

	constructor(private http: HttpClient, public userService: UserService){
		this.getAddr();
		this.getHeight();
		this.getPrice();
	}

	getHeight(){
		let obs = this.http.get<{message: string, height: number}>(this.beUrl+'api/blockheight');
		obs.subscribe((BlockData) => {
			this.dataStore.height = BlockData.height;
			this._heightUpdated.next(Object.assign({}, this.dataStore).height);
		});

		return obs;
	}

	getPrice(){
		var currency = 'usd';
		const params = new HttpParams().append('currency', currency);
		let obs = this.http.get<{message: string, price: any}>(this.beUrl+'api/price', { headers:{}, params: params, observe: 'response'});
		obs.subscribe((PriceData) => {
			if (PriceData.status == 200) {
				this.dataStore.price = PriceData.body!.price.price;
				console.log("price", this.dataStore.price);
				this._priceUpdated.next(Object.assign({},this.dataStore).price);
			} else {
				console.log('No price found for currency', currency);
			}
		});

		return obs;
	}

	hexToString(hexString: string) {
		var str = '';
		for (var n=0; n < hexString.length; n +=2) {
			str += String.fromCharCode(parseInt(hexString.substr(n, 2), 16));
		}
		return str;
	}



	getAddr() {
		let obs = this.http.get<{message: string, addr: string}>(this.beUrl+'api/getaddr');

		obs.subscribe((AddrData) => {
			this.dataStore.addr = AddrData.addr;
			this._addrUpdated.next(Object.assign({}, this.dataStore).addr);
		});

		return obs;
	}
}