import { defineStore } from 'pinia';
import { computed, ref } from 'vue';
import { fetchBusinessCategories } from '@/api/business-categories';
import { fetchBusiness, fetchBusinesses } from '@/api/businesses';
import type { Business } from '@/api/types';
import { MONTIME_BRAND, NIVASH_BRAND, type SiteBrand } from '@/constants/site-branding';

export const useTenantStore = defineStore('tenant', () => {
  const loaded = ref(false);
  const loading = ref(false);
  const isSingleBusiness = ref(false);
  const singleBusiness = ref<Business | null>(null);
  /** Business landing opened from multi-tenant discovery (not platform-wide single-business mode). */
  const focusedBusiness = ref<Business | null>(null);

  const landingBusiness = computed(() =>
    isSingleBusiness.value ? singleBusiness.value : focusedBusiness.value,
  );

  const landingBusinessId = computed(() => landingBusiness.value?.id ?? null);

  const brand = computed<SiteBrand>(() => {
    const biz = landingBusiness.value;
    if (biz) {
      return {
        ...NIVASH_BRAND,
        name: biz.title,
        shortName: biz.title,
        copyrightName: biz.title,
        aboutText: biz.description?.trim() || NIVASH_BRAND.aboutText,
      };
    }

    return MONTIME_BRAND;
  });

  const singleBusinessId = computed(() => singleBusiness.value?.id ?? null);

  function syncSingleBusiness(business: Business) {
    if (isSingleBusiness.value) {
      singleBusiness.value = business;
    }
    if (focusedBusiness.value?.id === business.id) {
      focusedBusiness.value = business;
    }
  }

  function setFocusedBusiness(business: Business | null) {
    focusedBusiness.value = business;
  }

  async function bootstrap() {
    if (loaded.value || loading.value) return;
    loading.value = true;
    try {
      const [categories, businesses] = await Promise.all([
        fetchBusinessCategories(),
        fetchBusinesses({ isActive: true }),
      ]);

      const activeCategories = categories.filter((c) => c.isActive);
      isSingleBusiness.value =
        activeCategories.length === 1 && businesses.length === 1;

      if (isSingleBusiness.value) {
        singleBusiness.value = await fetchBusiness(businesses[0].id);
      } else {
        singleBusiness.value = null;
      }
    } catch {
      isSingleBusiness.value = false;
      singleBusiness.value = null;
    } finally {
      loading.value = false;
      loaded.value = true;
    }
  }

  return {
    loaded,
    loading,
    isSingleBusiness,
    singleBusiness,
    singleBusinessId,
    focusedBusiness,
    landingBusiness,
    landingBusinessId,
    brand,
    bootstrap,
    syncSingleBusiness,
    setFocusedBusiness,
  };
});