import {Injectable} from '@angular/core';
import {BehaviorSubject, Observable} from 'rxjs';
import {HttpClient, HttpHeaders, HttpParams} from '@angular/common/http';
import {environment} from '@src/environments/environment';
import {first} from 'rxjs/operators';
import {ArgPair, Envelope, Syncable, User} from 'cic-client-meta';
import {MetaResponse} from '@app/_models';
import {LoggingService} from '@app/_services/logging.service';
import {TokenService} from '@app/_services/token.service';
import {AccountIndex, Registry} from '@app/_eth';
import {MutableKeyStore, MutablePgpKeyStore, PGPSigner, Signer} from '@app/_pgp';
const vCard = require('vcard-parser');

@Injectable({
  providedIn: 'root'
})
export class UserService {
  headers: HttpHeaders = new HttpHeaders({'x-cic-automerge': 'client'});
  keystore: MutableKeyStore = new MutablePgpKeyStore();
  signer: Signer = new PGPSigner(this.keystore);
  registry = new Registry(environment.registryAddress);

  accountsMeta = [];
  accounts: any = [];
  private accountsList = new BehaviorSubject<any>(this.accounts);
  accountsSubject = this.accountsList.asObservable();

  actions: any = '';
  private actionsList = new BehaviorSubject<any>(this.actions);
  actionsSubject = this.actionsList.asObservable();

  staff: any = '';
  private staffList = new BehaviorSubject<any>(this.staff);
  staffSubject = this.staffList.asObservable();

  constructor(
    private httpClient: HttpClient,
    private loggingService: LoggingService,
    private tokenService: TokenService
  ) {
  }

  resetPin(phone: string): Observable<any> {
    const params = new HttpParams().set('phoneNumber', phone);
    return this.httpClient.get(`${environment.cicUssdUrl}/pin`, {params});
  }

  getAccountStatus(phone: string): any {
    const params = new HttpParams().set('phoneNumber', phone);
    return this.httpClient.get(`${environment.cicUssdUrl}/pin`, {params});
  }

  getLockedAccounts(offset: number, limit: number): any {
    return this.httpClient.get(`${environment.cicUssdUrl}/accounts/locked/${offset}/${limit}`);
  }

  async changeAccountInfo(address: string, name: string, phoneNumber: string, age: string, type: string, bio: string, gender: string,
                          businessCategory: string, userLocation: string, location: string, locationType: string, metaAccount: MetaResponse
  ): Promise<any> {
    let reqBody = metaAccount;
    let accountInfo = reqBody.m.data;
    accountInfo.vcard.fn[0].value = name;
    accountInfo.vcard.n[0].value = name.split(' ');
    accountInfo.vcard.tel[0].value = phoneNumber;
    accountInfo.products = [bio];
    accountInfo.gender = gender;
    accountInfo.age = age;
    accountInfo.type = type;
    accountInfo.category = businessCategory;
    accountInfo.location.area = location;
    accountInfo.location.area_name = userLocation;
    accountInfo.location.area_type = locationType;
    accountInfo.vcard = vCard.generate(accountInfo.vcard);
    reqBody.m.data = accountInfo;
    const accountKey = await User.toKey(address);
    this.httpClient.get(`${environment.cicMetaUrl}/${accountKey}`, { headers: this.headers }).pipe(first()).subscribe(async res => {
      const syncableAccount: Syncable = Envelope.fromJSON(JSON.stringify(res)).unwrap();
      let update = [];
      for (const prop in reqBody) {
        update.push(new ArgPair(prop, reqBody[prop]));
      }
      syncableAccount.update(update, 'client-branch');
      await this.updateMeta(syncableAccount, accountKey, this.headers);
    }, async error => {
      this.loggingService.sendErrorLevelMessage('Can\'t find account info in meta service', this, {error});
      const syncableAccount: Syncable = new Syncable(accountKey, accountInfo);
      await this.updateMeta(syncableAccount, accountKey, this.headers);
    });
    return accountKey;
  }

  async updateMeta(syncableAccount: Syncable, accountKey: string, headers: HttpHeaders): Promise<any> {
    const envelope = await this.wrap(syncableAccount , this.signer);
    const reqBody = envelope.toJSON();
    this.httpClient.put(`${environment.cicMetaUrl}/${accountKey}`, reqBody , { headers }).pipe(first()).subscribe(res => {
      this.loggingService.sendInfoLevelMessage(`Response: ${res}`);
    });
  }

  getAccounts(): void {
    this.httpClient.get(`${environment.cicCacheUrl}/accounts`).pipe(first()).subscribe(res => this.accountsList.next(res));
  }

  getAccountById(id: number): Observable<any> {
    return this.httpClient.get(`${environment.cicCacheUrl}/accounts/${id}`);
  }

  getActions(): void {
    this.httpClient.get(`${environment.cicCacheUrl}/actions`).pipe(first()).subscribe(res => this.actionsList.next(res));
  }

  getActionById(id: string): any {
    return this.httpClient.get(`${environment.cicCacheUrl}/actions/${id}`);
  }

  approveAction(id: string): Observable<any> {
    return this.httpClient.post(`${environment.cicCacheUrl}/actions/${id}`, { approval: true });
  }

  revokeAction(id: string): Observable<any> {
    return this.httpClient.post(`${environment.cicCacheUrl}/actions/${id}`, { approval: false });
  }

  getHistoryByUser(id: string): Observable<any> {
    return this.httpClient.get(`${environment.cicCacheUrl}/history/${id}`);
  }

  getAccountDetailsFromMeta(userKey: string): Observable<any> {
    return this.httpClient.get(`${environment.cicMetaUrl}/${userKey}`, { headers: this.headers });
  }

  getUser(userKey: string): any {
    return this.httpClient.get(`${environment.cicMetaUrl}/${userKey}`, { headers: this.headers })
      .pipe(first()).subscribe(async res => {
      return Envelope.fromJSON(JSON.stringify(res)).unwrap();
    });
  }

  wrap(syncable: Syncable, signer: Signer): Promise<Envelope> {
    return new Promise<Envelope>(async (whohoo, doh) => {
      syncable.setSigner(signer);
      syncable.onwrap = async (env) => {
        if (env === undefined) {
          doh();
          return;
        }
        whohoo(env);
      };
      await syncable.sign();
    });
  }

  async loadAccounts(limit: number = 100, offset: number = 0): Promise<void> {
    this.resetAccountsList();
    const accountIndexAddress = await this.registry.addressOf('AccountRegistry');
    const accountIndexQuery = new AccountIndex(accountIndexAddress);
    const accountAddresses = await accountIndexQuery.last(await accountIndexQuery.totalAccounts());
    this.loggingService.sendInfoLevelMessage(accountAddresses);
    for (const accountAddress of accountAddresses.slice(offset, offset + limit)) {
      this.getAccountDetailsFromMeta(await User.toKey(accountAddress)).pipe(first()).subscribe(async res => {
        const account = Envelope.fromJSON(JSON.stringify(res)).unwrap();
        this.accountsMeta.push(account);
        const accountInfo = account.m.data;
        accountInfo.balance = await this.tokenService.getTokenBalance(accountInfo.identities.evm['bloxberg:8996'][0]);
        accountInfo.vcard = vCard.parse(atob(accountInfo.vcard));
        this.accounts.unshift(accountInfo);
        if (this.accounts.length > limit) {
          this.accounts.length = limit;
        }
        this.accountsList.next(this.accounts);
      });
    }
  }

  resetAccountsList(): void {
    this.accounts = [];
    this.accountsList.next(this.accounts);
  }
}