import { createSelector } from '../utils'
import type { StoreSimpleSelectors } from '../selectors'
import { filter } from '../../data-tools'

export default function generateSelectors(
    selectors: Pick<
        StoreSimpleSelectors,
        'selectFilterFn' | 'selectRowCollection' | 'selectFilterMode'
    >
) {
    const selectFilterMatches = createSelector(
        [selectors.selectFilterFn, selectors.selectRowCollection],
        (filterFn, rowCollection) => {
            if (filterFn) {
                const matches = filter(rowCollection, filterFn)
                return {
                    matchedIds: matches.actualMatches,
                    necessaryMatchedIds: matches.necessaryMatches,
                }
            } else {
                return {
                    matchedIds: null,
                    necessaryMatchedIds: null,
                }
            }
        }
    )

    const selectFilterMatchesShowOnly = createSelector(
        [selectors.selectFilterMode, selectFilterMatches],
        (mode, matches) =>
            mode === 'default' ? matches.necessaryMatchedIds : null
    )

    return { selectFilterMatchesShowOnly, selectFilterMatches }
}

export type SelectFilterMatchesShowOnly = ReturnType<
    typeof generateSelectors
>['selectFilterMatchesShowOnly']

export type SelectFilterMatches = ReturnType<
    typeof generateSelectors
>['selectFilterMatches']