import { createReducer, on } from '@ngrx/store';

import {
  initialState,
  adapterChatting,
  adapterEventList,
  Chatting,
  adapterFileInfoList,
  adapterFileInfoCheckList
} from './state';

import * as RoomActions from '../room/actions';
import {
  eventsSuccess,
  eventsFailure,
  fileInfosSuccess,
  fileInfosFailure,
  addEvent,
  delEventList,
  updateEventList
} from './actions';
import { Info, EventJson, EventType } from '@ucap/protocol-event';

export const reducer = createReducer(
  initialState,

  on(eventsSuccess, (state, action) => {
    const roomId = action.res.roomId;

    const chatting = state.chattings.entities[roomId] || {};
    let trgtChatting: Chatting = {
      roomId,

      eventListProcessing: false,
      eventList: adapterEventList.getInitialState(),
      eventStatus: null,
      remainEvent: false,

      fileInfoListProcessing: false,
      fileInfoList: adapterFileInfoList.getInitialState(),
      fileInfoCheckList: adapterFileInfoCheckList.getInitialState(),
      fileInfoSyncDate: '',
      ...chatting
    };

    trgtChatting = {
      ...trgtChatting,
      eventList: adapterEventList.upsertMany(action.eventInfoList, {
        ...trgtChatting.eventList
      }),
      eventStatus: action.res,
      remainEvent: action.remainEvent,
      eventListProcessing: false
    };

    return {
      ...state,
      chattings: adapterChatting.upsertOne(trgtChatting, {
        ...state.chattings
      })
    };
  }),

  on(eventsFailure, (state, action) => {
    const roomId = action.roomId;

    const chatting = state.chattings.entities[roomId];
    let trgtChatting: Chatting;
    if (!!chatting) {
      trgtChatting = {
        ...chatting,
        eventListProcessing: false
      };
    }

    return {
      ...state,
      chattings: adapterChatting.upsertOne(trgtChatting, {
        ...state.chattings
      })
    };
  }),

  on(fileInfosSuccess, (state, action) => {
    const roomId = action.res?.roomId;

    if (!roomId) {
      return state;
    }

    const chatting = state.chattings.entities[roomId] || {};
    let trgtChatting: Chatting = {
      roomId,

      eventListProcessing: false,
      eventList: adapterEventList.getInitialState(),
      eventStatus: null,
      remainEvent: false,

      fileInfoListProcessing: false,
      fileInfoList: adapterFileInfoList.getInitialState(),
      fileInfoCheckList: adapterFileInfoCheckList.getInitialState(),
      fileInfoSyncDate: '',
      ...chatting
    };

    const fileInfoList = action.fileInfoList;
    const fileInfoCheckList = action.fileInfoCheckList;

    trgtChatting = {
      ...trgtChatting,
      fileInfoList: !!fileInfoList
        ? adapterFileInfoList.upsertMany(fileInfoList, {
            ...trgtChatting.fileInfoList
          })
        : trgtChatting.fileInfoList,
      fileInfoCheckList: !!fileInfoCheckList
        ? adapterFileInfoCheckList.upsertMany(fileInfoCheckList, {
            ...trgtChatting.fileInfoCheckList
          })
        : trgtChatting.fileInfoCheckList,
      fileInfoListProcessing: false
    };

    return {
      ...state,
      chattings: adapterChatting.upsertOne(trgtChatting, {
        ...state.chattings
      })
    };
  }),

  on(fileInfosFailure, (state, action) => {
    const roomId = action.roomId;

    const chatting = state.chattings.entities[roomId];
    let trgtChatting: Chatting;
    if (!!chatting) {
      trgtChatting = {
        ...chatting,
        fileInfoListProcessing: false
      };
    }

    return {
      ...state,
      chattings: adapterChatting.upsertOne(trgtChatting, {
        ...state.chattings
      })
    };
  }),

  on(addEvent, (state, action) => {
    const roomId = action.roomId;
    const eventInfo = action.info;

    const chatting = state.chattings.entities[roomId];

    if (!!chatting) {
      return {
        ...state,
        chattings: adapterChatting.upsertOne(
          {
            ...chatting,
            eventList: adapterEventList.upsertOne(eventInfo, {
              ...chatting.eventList
            })
          },
          { ...state.chattings }
        )
      };
    } else {
      return state;
    }
  }),

  /*******************************************************************
   * [Room Action watching.]
   *******************************************************************/
  on(RoomActions.selectedRoomSuccess, (state, action) => {
    return {
      ...state,
      activeRoomId: action.roomId
    };
  }),

  on(RoomActions.clearSelectedRoom, (state, action) => {
    if (action.roomId === state.activeRoomId) {
      return {
        ...state,
        activeRoomId: null
      };
    } else {
      return state;
    }
  }),

  on(RoomActions.close, (state, action) => {
    const roomIds = action.roomIds;

    return {
      ...state,
      chattings: adapterChatting.removeMany(roomIds, { ...state.chattings })
    };
  }),

  on(delEventList, (state, action) => {
    const roomId = action.roomId;
    const chatting = state.chattings.entities[roomId];

    return {
      ...state,
      chattings: adapterChatting.upsertOne(
        {
          ...chatting,
          eventList: adapterEventList.removeMany(action.eventSeqs, {
            ...chatting.eventList
          })
        },
        { ...state.chattings }
      )
    };
  }),

  on(updateEventList, (state, action) => {
    const roomId = action.roomId;
    const eventSeq = action.eventSeq;
    const sentMessage = action.sentMessage;
    const chatting = state.chattings.entities[roomId];

    const statusEventInfo: Info<EventJson> = {
      ...chatting.eventList[eventSeq],
      type: EventType.RecalledMessage,
      sentMessage
    };

    return {
      ...state,
      chattings: adapterChatting.upsertOne(
        {
          ...chatting,
          eventList: adapterEventList.updateOne(
            { id: eventSeq, changes: statusEventInfo },
            {
              ...chatting.eventList
            }
          )
        },
        { ...state.chattings }
      )
    };
  })
);