import { Injectable } from '@angular/core';
import {environment} from '@src/environments/environment';
import {BehaviorSubject, Observable} from 'rxjs';
import {HttpGetter} from '@app/_helpers';
import {CICRegistry} from 'cic-client';
import Web3 from 'web3';
import {Registry, TokenRegistry} from '@app/_eth';
import {HttpClient} from '@angular/common/http';

@Injectable({
  providedIn: 'root'
})
export class TokenService {
  web3 = new Web3(environment.web3Provider);
  fileGetter = new HttpGetter();
  registry = new Registry(environment.registryAddress);
  cicRegistry = new CICRegistry(this.web3, environment.registryAddress, this.fileGetter, ['../../assets/js/block-sync/data']);
  tokens: any = '';
  private tokensList = new BehaviorSubject<any>(this.tokens);
  tokensSubject = this.tokensList.asObservable();

  constructor(
    private httpClient: HttpClient,
  ) { }

  async getTokens(): Promise<any> {
    const tokenRegistryQuery = new TokenRegistry(await this.registry.addressOf('TokenRegistry'));
    const count = await tokenRegistryQuery.totalTokens();
    return Array.from({length: count}, async (v, i) => await tokenRegistryQuery.entry(i));
  }

  getTokenBySymbol(symbol: string): Observable<any> {
    return this.httpClient.get(`${environment.cicCacheUrl}/tokens/${symbol}`);
  }

  async getTokenBalance(address: string): Promise<number> {
    const tokenRegistryQuery = new TokenRegistry(await this.registry.addressOf('TokenRegistry'));
    const sarafuToken = await this.cicRegistry.addToken(await tokenRegistryQuery.entry(0));
    return await sarafuToken.methods.balanceOf(address).call();
  }
}