GCTC-NTGC / TalentCloud

import isEqual from "lodash/isEqual";

import { createSelector } from "reselect";

import createCachedSelector from "re-reselect";

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

import { RatingGuideQuestionState } from "./ratingGuideQuestionReducer";

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

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

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

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

  state.ratingGuideQuestion;

const getCanonQuestionState = (

  state: RootState,

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

  stateSlice(state).ratingGuideQuestions;

const getTempQuestionState = (

  state: RootState,

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

  stateSlice(state).tempRatingGuideQuestions;

const getEditedQuestionState = (

  state: RootState,

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

  stateSlice(state).editedRatingGuideQuestions;

const getQuestionDeletes = (state: RootState): { [id: number]: number } =>

  stateSlice(state).ratingGuideQuestionDeletes;

const getTempQuestionSaving = (state: RootState): { [id: number]: boolean } =>

  stateSlice(state).tempRatingGuideQuestionSaving;

const getQuestionUpdates = (state: RootState): { [id: number]: number } =>

  stateSlice(state).ratingGuideQuestionUpdates;

const getCurrentQuestionState = createSelector(

  getCanonQuestionState,

  getEditedQuestionState,

  (canonQuestions, editedQuestions): { [id: number]: RatingGuideQuestion } => ({

    ...canonQuestions,

    ...editedQuestions,

  }),

);

/**

 * Returns current verisons of all assessments.

 * ie edited version if possible,

 * and not including those undergoing delete requests

 */

export const getCurrentRatingGuideQuestions = createSelector(

  [getCanonQuestionState, getEditedQuestionState, getQuestionDeletes],

  (questionState, editedQuestionState, deleteCount): RatingGuideQuestion[] => {

    const currentRatingGuideQuestions = {

      ...questionState,

      ...editedQuestionState,

    };

    return Object.values(currentRatingGuideQuestions).filter(

      (ratingGuideQuestion): boolean =>

        !hasKey(deleteCount, ratingGuideQuestion.id) ||

        deleteCount[ratingGuideQuestion.id] <= 0,

    );

  },

);

export const getTempRatingGuideQuestions = createSelector(

  getTempQuestionState,

  (tempQuestionState): RatingGuideQuestion[] =>

    Object.values(tempQuestionState),

);

export const getRatingGuideQuestionIds = createSelector(

  getCurrentQuestionState,

  (currentQuestions): number[] =>

    Object.keys(currentQuestions).map(id => Number(id)),

);

export const getTempRatingGuideQuestionIds = createSelector(

  getTempQuestionState,

  (tempQuestions): number[] => Object.keys(tempQuestions).map(id => Number(id)),

);

/**

 * Returns edited version, if available

 * */

export const getCurrentRatingGuideQuestionById = createSelector(

  getCurrentQuestionState,

  (state: RootState, id: number) => id,

  (questions, id): RatingGuideQuestion | null =>

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

);

export const getCanonRatingGuideQuestionById = createCachedSelector(

  getCanonQuestionState,

  (state: RootState, id: number): number => id,

  (questions, id): RatingGuideQuestion | null =>

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

)((state, id) => id);

export const getEditRatingGuideQuestionById = createCachedSelector(

  getEditedQuestionState,

  (state: RootState, id: number): number => id,

  (questions, id): RatingGuideQuestion | null =>

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

)((state, id) => id);

export const getTempRatingGuideQuestionById = createCachedSelector(

  getTempQuestionState,

  (state: RootState, id: number): number => id,

  (questions, id): RatingGuideQuestion | null =>

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

)((state, id) => id);

export const getRatingGuideQuestionsByJob = createCachedSelector(

  getCurrentRatingGuideQuestions,

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

  (questions, jobId): RatingGuideQuestion[] =>

    questions.filter((question): boolean => question.job_poster_id === jobId),

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

export const getRatingGuideQuestionIdsByJob = createCachedSelector(

  getRatingGuideQuestionsByJob,

  (questions): number[] => questions.map(getId),

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

export const getRatingGuideQuestionsByJobAndAssessmentType = createCachedSelector(

  getCurrentRatingGuideQuestions,

  (

    state: RootState,

    props: { jobId: number; assessmentTypeId: number },

  ): number => props.jobId,

  (

    state: RootState,

    props: { jobId: number; assessmentTypeId: number },

  ): number => props.assessmentTypeId,

  (questions, jobId, assessmentTypeId): RatingGuideQuestion[] =>

    questions.filter(

      (question): boolean =>

        question.job_poster_id === jobId &&

        question.assessment_type_id === assessmentTypeId,

    ),

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

export const getRatingGuideQuestionIdsByJobAndAssessmentType = createCachedSelector(

  (

    state: RootState,

    props: { jobId: number; assessmentTypeId: number },

  ): number[] =>

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

  (questionsIds): number[] => questionsIds,

)(

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

  deepEqualSelectorOptions,

);

export const getTempRatingGuideQuestionsByAssessment = createCachedSelector(

  getTempRatingGuideQuestions,

  (

    state: RootState,

    props: { jobId: number; assessmentTypeId: number },

  ): number => props.jobId,

  (

    state: RootState,

    props: { jobId: number; assessmentTypeId: number },

  ): number => props.assessmentTypeId,

  (questions, jobId, assessmentTypeId): RatingGuideQuestion[] =>

    questions.filter(

      (question): boolean =>

        question.job_poster_id === jobId &&

        question.assessment_type_id === assessmentTypeId,

    ),

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

export const getTempRatingGuideQuestionIdsByAssessment = createCachedSelector(

  (

    state: RootState,

    props: { jobId: number; assessmentTypeId: number },

  ): number[] =>

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

  (questionsIds): number[] => questionsIds,

)(

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

  deepEqualSelectorOptions,

);

// TODO: test that this works like I think it does -- Tristan

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

export const ratingGuideQuestionIsEdited = createCachedSelector(

  getCanonRatingGuideQuestionById,

  getEditRatingGuideQuestionById,

  (canon, edited): boolean => {

    if (canon === null) {

      return true;

    }

    return edited !== null && !isEqual(edited, canon);

  },

)((state: RootState, id: number): number => id);

export const ratingGuideQuestionsAreEditedByAssessment = createCachedSelector(

  getRatingGuideQuestionIdsByJobAndAssessmentType,

  getCanonQuestionState,

  getEditedQuestionState,

  (questionIds, canonState, editedState): { [id: number]: boolean } =>

    mapToObjectTrans(

      questionIds,

      (id): number => id,

      (questionId): boolean => {

        const canon = hasKey(canonState, questionId)

          ? canonState[questionId]

          : null;

        const edited = hasKey(editedState, questionId)

          ? editedState[questionId]

          : null;

        return edited !== null && !isEqual(edited, canon);

      },

    ),

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

export const tempRatingGuideQuestionIsSaving = createCachedSelector(

  getTempQuestionSaving,

  (state: RootState, id: number): number => id,

  (tempSaving, id): boolean =>

    hasKey(tempSaving, id) ? tempSaving[id] : false,

)((state: RootState, id: number): number => id);

export const tempRatingGuideQuestionsAreSavingByAssessment = createCachedSelector(

  getTempRatingGuideQuestionIdsByAssessment,

  getTempQuestionSaving,

  (questionIds, savingState): { [id: number]: boolean } =>

    mapToObjectTrans(

      questionIds,

      (id): number => id,

      (questionId): boolean =>

        hasKey(savingState, questionId) ? savingState[questionId] : false,

    ),

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

export const ratingGuideQuestionIsUpdating = createCachedSelector(

  getQuestionUpdates,

  (state: RootState, id: number): number => id,

  (updateCounts, id): boolean =>

    hasKey(updateCounts, id) ? updateCounts[id] > 0 : false,

)((state: RootState, id: number): number => id);

export const ratingGuideQuestionsAreUpdatingByAssessment = createCachedSelector(

  getRatingGuideQuestionIdsByJobAndAssessmentType,

  getQuestionUpdates,

  (questionIds, updateCounts): { [id: number]: boolean } =>

    questionIds.reduce(

      (

        result: { [id: number]: boolean },

        questionId: number,

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

        // eslint-disable-next-line no-param-reassign

        result[questionId] = hasKey(updateCounts, questionId)

          ? updateCounts[questionId] > 0

          : false;

        return result;

      },

      {},

    ),

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