GCTC-NTGC / TalentCloud

import { createSelector } from "reselect";

import createCachedSelector from "re-reselect";

import isEqual from "lodash/isEqual";

import { RootState } from "../store";

import { RatingGuideAnswerState } from "./ratingGuideAnswerReducer";

import { RatingGuideAnswer } from "../../models/types";

import {

  getRatingGuideQuestionIdsByJob,

  getRatingGuideQuestionIdsByJobAndAssessmentType,

} from "../RatingGuideQuestion/ratingGuideQuestionSelectors";

import { hasKey, getId } from "../../helpers/queries";

import { deepEqualSelectorOptions } from "../cachedSelectors";

const stateSlice = (state: RootState): RatingGuideAnswerState =>

  state.ratingGuideAnswer;

export const getCanonAnswerState = (

  state: RootState,

): { [id: number]: RatingGuideAnswer } => stateSlice(state).ratingGuideAnswers;

export const getEditedAnswerState = (

  state: RootState,

): { [id: number]: RatingGuideAnswer } =>

  stateSlice(state).editedRatingGuideAnswers;

export const getTempAnswerState = (

  state: RootState,

): { [id: number]: RatingGuideAnswer } =>

  stateSlice(state).tempRatingGuideAnswers;

export const getCurrentAnswerState = createSelector(

  getCanonAnswerState,

  getEditedAnswerState,

  (canon, edited): { [id: number]: RatingGuideAnswer } => ({

    ...canon,

    ...edited,

  }),

);

export const getAnswerDeleteState = (

  state: RootState,

): { [id: number]: number } => stateSlice(state).ratingGuideAnswerDeletes;

/**

 * Returns current verisons of all answers.

 * ie edited version if possible,

 * and not including those undergoing delete requests

 */

export const getCurrentRatingGuideAnswers = createSelector(

  getCurrentAnswerState,

  getAnswerDeleteState,

  (currentRatingGuideAnswers, deleteCount): RatingGuideAnswer[] =>

    Object.values(currentRatingGuideAnswers).filter(

      (ratingGuideAnswer): boolean =>

        !hasKey(deleteCount, ratingGuideAnswer.id) ||

        deleteCount[ratingGuideAnswer.id] <= 0,

    ),

);

export const getCanonRatingGuideAnswers = createSelector(

  getCanonAnswerState,

  (answerState): RatingGuideAnswer[] => Object.values(answerState),

);

export const getTempRatingGuideAnswers = createSelector(

  getTempAnswerState,

  (answerState): RatingGuideAnswer[] => Object.values(answerState),

);

/**

 * Returns current verisons of all answers.

 * ie edited version if possible,

 * and not including those undergoing delete requests

 */

export const getRatingGuideAnswersByJob = createCachedSelector(

  getCurrentRatingGuideAnswers,

  getRatingGuideQuestionIdsByJob,

  (answers, jobQuestionIds): RatingGuideAnswer[] =>

    answers.filter((answer): boolean =>

      jobQuestionIds.includes(answer.rating_guide_question_id),

    ),

)((state, props): number => props.jobId);

/**

 * Returns current verison of answer, ie edited version if possible.

 */

export const getRatingGuideAnswerById = createCachedSelector(

  getCurrentAnswerState,

  (state: RootState, props: { answerId: number }): number => props.answerId,

  (answerState, id): RatingGuideAnswer | null =>

    hasKey(answerState, id) ? answerState[id] : null,

)((state, props): number => props.answerId);

export const getTempRatingGuideAnswerById = createCachedSelector(

  getTempAnswerState,

  (state: RootState, props: { answerId: number }): number => props.answerId,

  (answerState, id): RatingGuideAnswer | null =>

    hasKey(answerState, id) ? answerState[id] : null,

)((state, props): number => props.answerId);

export const getRatingGuideAnswersByQuestion = createCachedSelector(

  getCurrentRatingGuideAnswers,

  (state: RootState, props: { questionId: number }): number => props.questionId,

  (answers, questionId): RatingGuideAnswer[] =>

    answers.filter(

      (answer): boolean => answer.rating_guide_question_id === questionId,

    ),

)((state, props): number => props.questionId);

export const getRatingGuideAnswerIdsByQuestion = createCachedSelector(

  (state: RootState, props: { questionId: number }): number[] =>

    getRatingGuideAnswersByQuestion(state, props).map(getId),

  (answerIds): number[] => answerIds,

)((state, props): number => props.questionId, deepEqualSelectorOptions);

// TODO: rename to ByAssessmentType

export const getRatingGuideAnswersByAssessment = createCachedSelector(

  getRatingGuideQuestionIdsByJobAndAssessmentType,

  getCurrentRatingGuideAnswers, // This is here to refresh the cache when answers change

  (questionIds, answers): RatingGuideAnswer[] =>

    answers.filter((answer): boolean =>

      questionIds.includes(answer.rating_guide_question_id),

    ),

)((state, props): string => `${props.jobId} ${props.assessmentTypeId}`);

export const getTempRatingGuideAnswersByQuestion = createCachedSelector(

  getTempRatingGuideAnswers,

  (state: RootState, props: { questionId: number }): number => props.questionId,

  (answers, questionId): RatingGuideAnswer[] =>

    answers.filter(

      (answer): boolean => answer.rating_guide_question_id === questionId,

    ),

)((state, props): number => props.questionId);

export const getTempRatingGuideAnswerIdsByQuestion = createCachedSelector(

  (state: RootState, props: { questionId: number }): number[] =>

    getTempRatingGuideAnswersByQuestion(state, props).map(getId),

  (answerIds): number[] => answerIds,

)((state, props): number => props.questionId, deepEqualSelectorOptions);

export const getCanonRatingGuideAnswerById = createCachedSelector(

  getCanonAnswerState,

  (state: RootState, props: { answerId: number }): number => props.answerId,

  (answerState, answerId): RatingGuideAnswer | null =>

    hasKey(answerState, answerId) ? answerState[answerId] : null,

)((state, props): number => props.answerId);

export const getEditRatingGuideAnswerById = createCachedSelector(

  getEditedAnswerState,

  (state: RootState, props: { answerId: number }): number => props.answerId,

  (answerState, answerId): RatingGuideAnswer | null =>

    hasKey(answerState, answerId) ? answerState[answerId] : null,

)((state, props): number => props.answerId);

/** Returns true if there is an edited verision which differs from canonical version */

export const ratingGuideAnswerIsEdited = createCachedSelector(

  getCanonRatingGuideAnswerById,

  getEditRatingGuideAnswerById,

  (canon, edited): boolean => edited !== null && !isEqual(edited, canon),

)((state, props): number => props.answerId);

export const ratingGuideAnswerIsUpdating = (

  state: RootState,

  id: number,

): boolean =>

  hasKey(stateSlice(state).ratingGuideAnswerUpdates, id)

    ? stateSlice(state).ratingGuideAnswerUpdates[id] > 0

    : false;

export const tempRatingGuideAnswerIsSaving = (

  state: RootState,

  id: number,

): boolean =>

  hasKey(stateSlice(state).tempRatingGuideAnswerSaving, id)

    ? stateSlice(state).tempRatingGuideAnswerSaving[id]

    : false;