import { Decision } from './types';
import { DecisionsActionTypes, DecisionsActions } from './decisionsContextActions';

type StateRecord = Record<string, Decision>;

export type DecisionsState = StateRecord;

export const decisionsReducer = (state: DecisionsState, action: DecisionsActions): DecisionsState => {
  switch (action.type) {
    case DecisionsActionTypes.InitFromItems:
      return action.payload.reduce(function (acc: StateRecord, item) {
        acc[item.serviceId] = item;
        return acc;
      }, {});
    case DecisionsActionTypes.Update:
      const { serviceId } = action.payload;

      return {
        ...state,
        [serviceId]: {
          ...state[serviceId],
          ...action.payload,
        },
      };
    default:
      return state;
  }
};

export const selectAllDecisions = (state: DecisionsState): Decision[] => Object.values(state);
export const selectAllUserDecisions = (state: DecisionsState): { serviceId: string; status: boolean }[] =>
  selectAllDecisions(state).map(({ serviceId, status }) => ({
    serviceId,
    status,
  }));
export const selectDecision = (state: DecisionsState, id: string): Decision => state[id];