// hooks/useHistoryFeed.ts

import { useMemo } from 'react'

import { mergeAndSort, filterByCategory, groupByDate } from '@/lib/utils/history'

import {

  mapMoodToHistoryCard,

  mapSleepToHistoryCard,

  mapTriggerToHistoryCard,

  mapInterventionToHistoryCard

} from '@/lib/history/mappers'

import type { HistoryCategory } from '@/lib/history/types'

import { useMoodEntries, useSleepRecords } from '@/hooks';

export function useHistoryFeed(activeFilter: HistoryCategory | 'all') {

  const { data: moodsPage }        = useMoodEntries({})

  const { data: sleepPage }        = useSleepRecords({})

  const moods        = moodsPage?.entries ?? []

  const sleepRecords = sleepPage?.entries ?? []

  const grouped = useMemo(() => {

    const merged = mergeAndSort([

      moods.map(mapMoodToHistoryCard),

      sleepRecords.map(mapSleepToHistoryCard),

    ])

    const filtered = filterByCategory(merged, activeFilter)

    return groupByDate(filtered)

  }, [moods, sleepRecords, activeFilter])

  // TODO: expose the isLoading here

  return grouped

}

// TODO: add a barrel import here ffs

import type { HistoryCard, HistoryCategory } from '@/lib/history/types'

export function mergeAndSort(cards: HistoryCard[][]): HistoryCard[] {

  return cards

  .flat()

  .sort((a, b) => new Date(b.timestamp).getTime() - new Date(a.timestamp).getTime())

}

export function groupByDate(cards: HistoryCard[]): Record<string, HistoryCard[]> {

  return cards.reduce<Record<string, HistoryCard[]>>((acc, card) => {

    const key = new Date(card.timestamp).toLocaleDateString('pt-BR', {

      weekday: 'long',

      day: 'numeric',

      month: 'long',

    });

    // XXX: Hacky as fuck

    (acc[key] ??= []).push(card)

    return acc

  }, {})

}

export function filterByCategory(

  cards: HistoryCard[],

  active: HistoryCategory | 'all',

): HistoryCard[] {

  if (active === 'all') return cards

    return cards.filter(c => c.category === active)

}