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

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

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

import { NGXLogger } from 'ngx-logger';

import { of } from 'rxjs';
import {
  tap,
  switchMap,
  map,
  catchError,
  exhaustMap,
  withLatestFrom
} from 'rxjs/operators';
import {
  InfoData,
  Info,
  InfoResponse,
  EventProtocolService,
  SSVC_TYPE_EVENT_INFO_DATA,
  SSVC_TYPE_EVENT_INFO_RES,
  SendResponse,
  ReadResponse
} from '@ucap-webmessenger/protocol-event';

import * as ChatStore from '@app/store/messenger/chat';
import * as SyncStore from '@app/store/messenger/sync';

import {
  info,
  infoSuccess,
  infoFailure,
  send,
  sendSuccess,
  sendFailure,
  appendInfoList,
  newInfo,
  sendNotification,
  readNotification,
  cancelNotification,
  delNotification,
  recallInfoList,
  read,
  readFailure
} from './actions';
import { SessionStorageService } from '@ucap-webmessenger/web-storage';
import { RoomInfo } from '@ucap-webmessenger/protocol-room';
import { refreshRoom } from '../sync';
import { LoginInfo, KEY_LOGIN_INFO } from '@app/types';
import { Dictionary } from '@ngrx/entity';

@Injectable()
export class Effects {
  selectedRoomForInfo$ = createEffect(() =>
    this.actions$.pipe(
      ofType(ChatStore.selectedRoom),
      map(action => {
        return info({
          roomSeq: action.roomSeq,
          baseSeq: 0,
          requestCount: 50
        });
      })
    )
  );

  info$ = createEffect(
    () => {
      let infoList: Info[];

      return this.actions$.pipe(
        ofType(info),
        tap(() => {
          infoList = [];
        }),
        switchMap(req => {
          return this.eventProtocolService.info(req).pipe(
            map(res => {
              switch (res.SSVC_TYPE) {
                case SSVC_TYPE_EVENT_INFO_DATA:
                  infoList.push(...(res as InfoData).infoList);
                  break;
                case SSVC_TYPE_EVENT_INFO_RES:
                  {
                    this.store.dispatch(
                      infoSuccess({
                        infoList,
                        res: res as InfoResponse
                      })
                    );

                    if (req.baseSeq === 0) {
                      // 최초 이벤트 목록 조회시 SSVC_TYPE_EVENT_READ_REQ 수행.
                      const maxSeq = Math.max.apply(
                        Math,
                        infoList.map(v => v.seq)
                      );
                      this.store.dispatch(
                        read({
                          roomSeq: req.roomSeq,
                          lastReadSeq: Number(maxSeq)
                        })
                      );
                    }
                  }
                  break;
              }
            }),
            catchError(error => of(infoFailure({ error })))
          );
        })
      );
    },
    { dispatch: false }
  );

  read$ = createEffect(
    () => {
      return this.actions$.pipe(
        ofType(read),
        switchMap(req => {
          return this.eventProtocolService.read(req).pipe(
            map((res: ReadResponse) => {
              this.store.dispatch(
                SyncStore.updateUnreadCount({
                  roomSeq: res.roomSeq,
                  noReadCnt: 0
                })
              );
            }),
            catchError(error => of(readFailure({ error })))
          );
        })
      );
    },
    { dispatch: false }
  );

  send$ = createEffect(() =>
    this.actions$.pipe(
      ofType(send),
      exhaustMap(action =>
        this.eventProtocolService.send(action.req).pipe(
          map((res: SendResponse) => {
            return sendSuccess({
              senderSeq: action.senderSeq,
              res
            });
          }),
          catchError(error => of(sendFailure({ error })))
        )
      )
    )
  );

  sendSuccess$ = createEffect(
    () => {
      return this.actions$.pipe(
        ofType(sendSuccess),
        tap(action => {
          const res = action.res;
          const appendInfo: Info = {
            seq: res.seq,
            type: res.eventType,
            senderSeq: action.senderSeq,
            sendDate: res.sendDate,
            sentMessage: res.message,
            receiverCount: res.receiverCount
          };

          this.store.dispatch(
            newInfo({ roomSeq: res.roomSeq, info: appendInfo })
          );
        })
      );
    },
    { dispatch: false }
  );

  sendNotification$ = createEffect(
    () => {
      return this.actions$.pipe(
        ofType(sendNotification),
        map(action => action.noti),
        tap(noti => {
          const appendInfo: Info = {
            seq: noti.seq,
            type: noti.eventType,
            senderSeq: noti.SENDER_SEQ,
            sendDate: noti.sendDate,
            sentMessage: noti.message,
            receiverCount: noti.receiverCount
          };

          this.store.dispatch(
            newInfo({ roomSeq: noti.roomSeq, info: appendInfo })
          );
        })
      );
    },
    { dispatch: false }
  );

  newInfo$ = createEffect(
    () => {
      return this.actions$.pipe(
        ofType(newInfo),
        withLatestFrom(
          this.store.pipe(
            select((state: any) => state.messenger.room.roomInfo as RoomInfo)
          ),
          this.store.pipe(
            select(
              (state: any) =>
                state.messenger.sync.room.entities as Dictionary<RoomInfo>
            )
          )
        ),
        tap(([action, roomInfo, trgtRoomInfos]) => {
          // opened room :: event add
          if (!!roomInfo && roomInfo.roomSeq === action.roomSeq) {
            this.store.dispatch(appendInfoList({ info: action.info }));
          }

          // not opened room :: unread count increased
          if (!roomInfo || roomInfo.roomSeq !== action.roomSeq) {
            if (!!trgtRoomInfos && !!trgtRoomInfos[action.roomSeq]) {
              const noReadCnt = trgtRoomInfos[action.roomSeq].noReadCnt;
              this.store.dispatch(
                SyncStore.updateUnreadCount({
                  roomSeq: action.roomSeq,
                  noReadCnt: noReadCnt + 1
                })
              );
            }
          }

          // 대화 > 리스트 :: finalEventMessage refresh
          this.store.dispatch(ChatStore.newEventMessage(action));
        })
      );
    },
    { dispatch: false }
  );

  readNotification$ = createEffect(
    () => {
      return this.actions$.pipe(
        ofType(readNotification),
        map(action => action.noti),
        tap(noti => {})
      );
    },
    { dispatch: false }
  );

  cancelNotification$ = createEffect(
    () => {
      return this.actions$.pipe(
        ofType(cancelNotification),
        withLatestFrom(
          this.store.pipe(
            select((state: any) => state.messenger.room.roomInfo as RoomInfo)
          )
        ),
        tap(([action, roomInfo]) => {
          // 현재 방이 오픈되어 있으면 방내용 갱신
          if (!!roomInfo && roomInfo.roomSeq === action.noti.roomSeq) {
            this.logger.debug('cancelNotification$', action, roomInfo);
            this.store.dispatch(
              recallInfoList({ eventSeq: action.noti.eventSeq })
            );
          }
          // 대화 > 리스트의 항목 갱신
          const loginInfo = this.sessionStorageService.get<LoginInfo>(
            KEY_LOGIN_INFO
          );
          this.store.dispatch(
            SyncStore.refreshRoom({
              roomSeq: action.noti.roomSeq,
              isDetail: true,
              localeCode: loginInfo.localeCode
            })
          );
        })
      );
    },
    { dispatch: false }
  );

  delNotification$ = createEffect(
    () => {
      return this.actions$.pipe(
        ofType(delNotification),
        map(action => action.noti),
        tap(noti => {})
      );
    },
    { dispatch: false }
  );

  constructor(
    private actions$: Actions,
    private store: Store<any>,
    private eventProtocolService: EventProtocolService,
    private sessionStorageService: SessionStorageService,
    private logger: NGXLogger
  ) {}
}