interface BibleStudyChip {
  id: number
  title: string
}

const activeBibleStudies = useState<BibleStudyChip[]>('bible-study-chips', () => [])

export function useFilters() {
  const { documentsApi } = useTypesenseApi()
  const toast = useToast()

  const bibleStudyInput = ref<number | null>(null)
  const isValidating = ref(false)

  const activeCount = computed(() => activeBibleStudies.value.length)

  async function applyBibleStudyFilter(mainCollection: string) {
    const val = bibleStudyInput.value
    if (val === null || val <= 0) return
    if (activeBibleStudies.value.some(bs => bs.id === val)) {
      toast.add({ title: 'Estudio ya agregado', description: `El estudio #${val} ya está en el filtro`, color: 'info' })
      bibleStudyInput.value = null
      return
    }

    isValidating.value = true
    try {
      const res = await documentsApi.multiSearch({
        multiSearchParameters: {},
        multiSearchSearchesParameter: {
          searches: [{
            collection: mainCollection,
            q: '*',
            queryBy: 'title',
            filterBy: `bible_study:=${val}`,
            perPage: 1,
            includeFields: 'bible_study,title'
          }]
        }
      })

      const hit = (res?.results?.[0] as { hits?: Array<{ document: { title?: string } }> })?.hits?.[0]
      if (hit) {
        activeBibleStudies.value = [...activeBibleStudies.value, { id: val, title: hit.document.title || '' }]
        bibleStudyInput.value = null
      } else {
        toast.add({ title: 'Estudio no encontrado', description: `No existe el estudio #${val}`, color: 'warning' })
      }
    } catch (err) {
      console.error('Error validando bible_study', err)
    } finally {
      isValidating.value = false
    }
  }

  function removeBibleStudyFilter(id: number) {
    activeBibleStudies.value = activeBibleStudies.value.filter(bs => bs.id !== id)
  }

  function clearAllBibleStudyFilters() {
    activeBibleStudies.value = []
  }

  return {
    activeBibleStudies,
    activeCount,
    bibleStudyInput,
    isValidating,
    applyBibleStudyFilter,
    removeBibleStudyFilter,
    clearAllBibleStudyFilters
  }
}