import { defineStore } from 'pinia'
import { ref, computed } from 'vue'
import { useApi } from '../composables/useApi.js'

const PAGE = 60

export const useArtistDirectoryStore = defineStore('artistDirectory', () => {
  const api = useApi()
  const cards = ref([])
  const nextCursor = ref(null)
  const loading = ref(false)
  const error = ref(null)
  const q = ref('')
  const platform = ref(null)
  let started = false

  async function loadMore() {
    if (loading.value) return
    if (started && nextCursor.value === null) return
    loading.value = true
    error.value = null
    try {
      const params = { limit: PAGE }
      if (q.value) params.q = q.value
      if (platform.value) params.platform = platform.value
      if (nextCursor.value) params.cursor = nextCursor.value
      const body = await api.get('/api/artists/directory', { params })
      cards.value.push(...body.cards)
      nextCursor.value = body.next_cursor
      started = true
    } catch (e) {
      error.value = e.message
    } finally {
      loading.value = false
    }
  }

  async function reset() {
    cards.value = []
    nextCursor.value = null
    started = false
    await loadMore()
  }

  function setQuery(text) { q.value = text; reset() }
  function setPlatform(p) { platform.value = p; reset() }

  const hasMore = computed(() => !started || nextCursor.value !== null)
  const isEmpty = computed(
    () => !loading.value && cards.value.length === 0 && error.value === null
  )

  return {
    cards, loading, error, q, platform, hasMore, isEmpty,
    loadMore, reset, setQuery, setPlatform,
  }
})