import { Injectable } from '@angular/core';

import { Observable } from 'rxjs';
import { map, take } from 'rxjs/operators';

import { ProtocolService } from '@ucap-webmessenger/protocol';

import {
  SVC_TYPE_BUDDY,
  SSVC_TYPE_BUDDY_ADD_REQ,
  SSVC_TYPE_BUDDY_DEL_REQ,
  SSVC_TYPE_BUDDY_UPD_REQ
} from '../types/service';

import { AddRequest, encodeAdd, decodeAdd, AddResponse } from '../models/add';
import { DelRequest, encodeDel, decodeDel, DelResponse } from '../models/del';
import {
  UpdateRequest,
  decodeUpdate,
  encodeUpdate,
  UpdateResponse
} from '../models/update';

@Injectable({
  providedIn: 'root'
})
export class BuddyProtocolService {
  constructor(private protocolService: ProtocolService) {}

  public add(req: AddRequest): Observable<AddResponse> {
    return this.protocolService
      .call(SVC_TYPE_BUDDY, SSVC_TYPE_BUDDY_ADD_REQ, ...encodeAdd(req))
      .pipe(
        take(1),
        map(res => decodeAdd(res))
      );
  }

  public del(req: DelRequest): Observable<DelResponse> {
    return this.protocolService
      .call(SVC_TYPE_BUDDY, SSVC_TYPE_BUDDY_DEL_REQ, ...encodeDel(req))
      .pipe(
        take(1),
        map(res => decodeDel(res))
      );
  }

  public update(req: UpdateRequest): Observable<UpdateResponse> {
    return this.protocolService
      .call(SVC_TYPE_BUDDY, SSVC_TYPE_BUDDY_UPD_REQ, ...encodeUpdate(req))
      .pipe(
        take(1),
        map(res => decodeUpdate(res))
      );
  }
}