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, map} from 'rxjs/operators';
import { ArgPair, Envelope, Syncable } from '@src/assets/js/cic-meta/sync.js';
import {MutableKeyStore, MutablePgpKeyStore, PGPSigner, Signer} from '@app/_helpers';

@Injectable({
  providedIn: 'root'
})
export class UserService {
  keystore: MutableKeyStore = new MutablePgpKeyStore();
  syncableAccount: Syncable;
  signer: Signer = new PGPSigner(this.keystore);

  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 http: HttpClient) { }

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

  createAccount(accountType: string, idNumber: string, phoneNumber: string, givenName: string, surname: string, directoryEntry: string,
                location: string, gender: string, referrer: string, businessCategory: string): Observable<any> {
    console.log(accountType);
    return this.http.post(
      `${environment.cicUssdUrl}/user`,
      {
        accountType: accountType,
        idNumber: idNumber,
        phone: phoneNumber,
        givenName: givenName,
        surname: surname,
        directoryEntry: directoryEntry,
        location: location,
        gender: gender,
        referrer: referrer,
        businessCategory: businessCategory
      }
    );
  }

  async changeAccountInfo(address: string, status: string, name: string, phoneNumber: string, type: string, token: string,
                          failedPinAttempts: string, bio: string, gender: string, businessCategory: string, userLocation: string,
                          location: string, referrer: string): Promise<any> {
    const accountDetails = {
      status,
      name,
      phoneNumber,
      type,
      token,
      failedPinAttempts,
      bio,
      gender,
      businessCategory,
      userLocation,
      location,
      referrer
    };
    let addressStub = address.slice(2);
    addressStub = '0000000000000000000000000000000000000000000000000000000000000000';
    const headers = new HttpHeaders({'x-cic-automerge': 'client'});
    this.http.get(`${environment.cicMetaUrl}/${addressStub}`, { headers }).pipe(first()).subscribe(async res => {
      this.syncableAccount = Envelope.fromJSON(res).unwrap();
      let update = [];
      for (const prop in accountDetails) {
        update.push(new ArgPair(prop, accountDetails[prop]));
      }
      this.syncableAccount.update(update, 'client-branch');
      await this.updateMeta(addressStub, headers);
    }, async error => {
      console.error('There is an error!', error);
      const refName = addressStub + ':cic-person';
      this.syncableAccount = new Syncable(refName, accountDetails);
      await this.updateMeta(addressStub, headers);
    });
    return addressStub;
  }

  async updateMeta(addressStub: string, headers: HttpHeaders): Promise<any> {
    const envelope = await this.wrap(this.syncableAccount , this.signer);
    const reqBody = envelope.toJSON();
    this.http.put(`${environment.cicMetaUrl}/${addressStub}`, { data: reqBody }, { headers }).pipe(first()).subscribe(res => {
      console.log(res);
    });
  }

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

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

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

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

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

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

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

  getStaff(): void {
    this.http.get(`${environment.cicCacheUrl}/staff`).pipe(first()).subscribe(staff => this.staffList.next(staff));
  }

  getStaffById(id: string): Observable<any> {
    return this.http.get(`${environment.cicCacheUrl}/staff/${id}`);
  }

  activateStaff(id: string): Observable<any> {
    return this.http.post(`${environment.cicCacheUrl}/staff/${id}`, {status: 'activated'});
  }

  deactivateStaff(id: string): Observable<any> {
    return this.http.post(`${environment.cicCacheUrl}/staff/${id}`, {status: 'deactivated'});
  }

  changeStaffType(id: string, type: string): Observable<any> {
    return this.http.post(`${environment.cicCacheUrl}/staff/${id}`, {accountType: type});
  }

  getUser(userKey: string): Observable<any> {
    const params = new HttpParams().set('userKey', '0970c6e9cdad650ba9006e5a1caf090a13da312792389a147263c98ac78cd037');
    return this.http.get(`${environment.cicScriptsUrl}`, { params })
      .pipe(map(response => {
        return response;
      }));
  }

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