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

import { Actions, ofType, createEffect } from '@ngrx/effects';

import { of } from 'rxjs';
import { catchError, map, tap, switchMap } from 'rxjs/operators';

import { dept, deptSuccess, deptFailure } from './actions';

import {
  QueryProtocolService,
  DeptInfo,
  SSVC_TYPE_QUERY_DEPT_DATA,
  SSVC_TYPE_QUERY_DEPT_RES,
  DeptData
} from '@ucap-webmessenger/protocol-query';
import { SessionStorageService } from '@ucap-webmessenger/web-storage';

import { Store } from '@ngrx/store';

@Injectable()
export class Effects {
  dept$ = createEffect(
    () => {
      let departmentInfoList: DeptInfo[];

      return this.actions$.pipe(
        ofType(dept),
        tap(() => {
          departmentInfoList = [];
        }),
        switchMap(req => {
          return this.queryProtocolService.dept(req).pipe(
            map(res => {
              switch (res.Type) {
                case SSVC_TYPE_QUERY_DEPT_DATA:
                  departmentInfoList.push(...(res as DeptData).departmentInfos);
                  break;
                case SSVC_TYPE_QUERY_DEPT_RES:
                  this.store.dispatch(
                    deptSuccess({
                      departmentInfoList
                    })
                  );
                  break;
              }
            }),
            catchError(error => of(deptFailure({ error })))
          );
        })
      );
    },
    { dispatch: false }
  );

  constructor(
    private actions$: Actions,
    private store: Store<any>,
    private sessionStorageService: SessionStorageService,
    private queryProtocolService: QueryProtocolService
  ) {}
}