import type { InfoEntityType } from './useCatalogSearch'
import {
  GetNodeDocument,
  NearestOffersDocument,
  NearestHubsDocument,
  RouteToCoordinateDocument
} from '~/composables/graphql/public/geo-generated'
import {
  GetOfferDocument,
  GetSupplierProfileDocument
} from '~/composables/graphql/public/exchange-generated'

export function useCatalogInfo() {
  const { execute } = useGraphQL()

  // State
  const entity = ref<any>(null)
  const relatedProducts = ref<any[]>([])
  const relatedHubs = ref<any[]>([])
  const relatedSuppliers = ref<any[]>([])
  const relatedOffers = ref<any[]>([])
  const selectedProduct = ref<string | null>(null)
  const activeTab = ref<string>('products')
  const isLoading = ref(false)

  // Load hub info: hub details + products + suppliers
  const loadHubInfo = async (uuid: string) => {
    try {
      // Load hub node details
      const nodeData = await execute(GetNodeDocument, { uuid }, 'public', 'geo')
      entity.value = nodeData?.node

      if (!entity.value?.latitude || !entity.value?.longitude) {
        console.warn('Hub has no coordinates')
        return
      }

      // Load offers near hub and group by product
      const offersData = await execute(
        NearestOffersDocument,
        {
          lat: entity.value.latitude,
          lon: entity.value.longitude,
          radius: 500
        },
        'public',
        'geo'
      )

      // Group offers by product
      const productsMap = new Map<string, any>()
      offersData?.nearestOffers?.forEach((offer: any) => {
        if (offer?.productUuid) {
          if (!productsMap.has(offer.productUuid)) {
            productsMap.set(offer.productUuid, {
              uuid: offer.productUuid,
              name: offer.productName,
              offersCount: 0
            })
          }
          productsMap.get(offer.productUuid)!.offersCount++
        }
      })
      relatedProducts.value = Array.from(productsMap.values())

      // Set default active tab to offers (first step shows products)
      activeTab.value = 'offers'

      // Note: Suppliers loaded after product selection via loadOffersForHub
    } catch (error) {
      console.error('Error loading hub info:', error)
    }
  }

  // Load supplier info: supplier details + products
  const loadSupplierInfo = async (uuid: string) => {
    try {
      // Load supplier node details (might be geo node)
      const nodeData = await execute(GetNodeDocument, { uuid }, 'public', 'geo')
      entity.value = nodeData?.node

      // Also try to get supplier profile from exchange API for additional details
      try {
        const profileData = await execute(
          GetSupplierProfileDocument,
          { uuid },
          'public',
          'exchange'
        )
        if (profileData?.getSupplierProfile) {
          entity.value = { ...entity.value, ...profileData.getSupplierProfile }
        }
      } catch (e) {
        // Supplier profile might not exist, ignore
      }

      if (!entity.value?.latitude || !entity.value?.longitude) {
        console.warn('Supplier has no coordinates')
        return
      }

      // Load offers near supplier and group by product
      const offersData = await execute(
        NearestOffersDocument,
        {
          lat: entity.value.latitude,
          lon: entity.value.longitude,
          radius: 500
        },
        'public',
        'geo'
      )

      // Group offers by product
      const productsMap = new Map<string, any>()
      offersData?.nearestOffers?.forEach((offer: any) => {
        if (offer?.productUuid) {
          if (!productsMap.has(offer.productUuid)) {
            productsMap.set(offer.productUuid, {
              uuid: offer.productUuid,
              name: offer.productName,
              offersCount: 0
            })
          }
          productsMap.get(offer.productUuid)!.offersCount++
        }
      })
      relatedProducts.value = Array.from(productsMap.values())

      // Set default active tab to offers (first step shows products)
      activeTab.value = 'offers'

      // Note: Hubs will be loaded after product selection
    } catch (error) {
      console.error('Error loading supplier info:', error)
    }
  }

  // Load offer info: offer details + supplier + hubs
  const loadOfferInfo = async (uuid: string) => {
    try {
      // Load offer details from exchange API
      const offerData = await execute(GetOfferDocument, { uuid }, 'public', 'exchange')
      entity.value = offerData?.getOffer

      if (!entity.value?.latitude || !entity.value?.longitude) {
        console.warn('Offer has no coordinates')
        return
      }

      // Load hubs near offer coordinates
      const hubsData = await execute(
        NearestHubsDocument,
        {
          lat: entity.value.latitude,
          lon: entity.value.longitude,
          radius: 1000,
          limit: 12
        },
        'public',
        'geo'
      )
      relatedHubs.value = hubsData?.nearestHubs || []

      // If offer has supplier UUID, load supplier profile
      if (entity.value?.teamUuid) {
        try {
          const supplierData = await execute(
            GetSupplierProfileDocument,
            { uuid: entity.value.teamUuid },
            'public',
            'exchange'
          )
          relatedSuppliers.value = supplierData?.getSupplierProfile
            ? [supplierData.getSupplierProfile]
            : []
        } catch (e) {
          // Supplier might not exist
        }
      }

      // Set default active tab to hubs
      activeTab.value = 'hubs'

      // Set product as "related product" (single item)
      if (entity.value?.productUuid && entity.value?.productName) {
        relatedProducts.value = [
          {
            uuid: entity.value.productUuid,
            name: entity.value.productName
          }
        ]
      }
    } catch (error) {
      console.error('Error loading offer info:', error)
    }
  }

  // Load offers for hub after product selection
  const loadOffersForHub = async (hubUuid: string, productUuid: string) => {
    try {
      const hub = entity.value
      if (!hub?.latitude || !hub?.longitude) {
        console.warn('Hub has no coordinates')
        return
      }

      // 1. Find offers near hub for this product
      const offersData = await execute(
        NearestOffersDocument,
        {
          lat: hub.latitude,
          lon: hub.longitude,
          productUuid,
          radius: 500,
          limit: 12
        },
        'public',
        'geo'
      )

      const offers = offersData?.nearestOffers || []

      // 2. For each offer, get route to hub
      const offersWithRoutes = await Promise.all(
        offers.map(async (offer: any) => {
          try {
            const routeData = await execute(
              RouteToCoordinateDocument,
              {
                offerUuid: offer.uuid,
                lat: hub.latitude,
                lon: hub.longitude
              },
              'public',
              'geo'
            )
            return {
              ...offer,
              sourceUuid: offer.uuid,
              sourceName: offer.productName,
              sourceLat: offer.latitude,
              sourceLon: offer.longitude,
              distanceKm: routeData?.routeToCoordinate?.distanceKm,
              routes: routeData?.routeToCoordinate?.routes || []
            }
          } catch (e) {
            // Route might not exist
            console.warn('No route found for offer:', offer.uuid, e)
            return {
              ...offer,
              sourceUuid: offer.uuid,
              sourceName: offer.productName,
              sourceLat: offer.latitude,
              sourceLon: offer.longitude,
              routes: []
            }
          }
        })
      )

      relatedOffers.value = offersWithRoutes

      // Extract unique suppliers from offers (use supplierUuid from offers)
      const supplierUuids = new Set<string>()
      offersWithRoutes.forEach((offer: any) => {
        if (offer.supplierUuid) {
          supplierUuids.add(offer.supplierUuid)
        }
      })

      // Load supplier profiles (limit to 12)
      const suppliers: any[] = []
      for (const uuid of Array.from(supplierUuids).slice(0, 12)) {
        try {
          const supplierData = await execute(
            GetSupplierProfileDocument,
            { uuid },
            'public',
            'exchange'
          )
          if (supplierData?.getSupplierProfile) {
            suppliers.push(supplierData.getSupplierProfile)
          }
        } catch (e) {
          // Supplier might not exist
        }
      }
      relatedSuppliers.value = suppliers
    } catch (error) {
      console.error('Error loading offers for hub:', error)
    }
  }

  // Load offers for supplier after product selection
  const loadOffersForSupplier = async (supplierUuid: string, productUuid: string) => {
    try {
      const supplier = entity.value
      if (!supplier?.latitude || !supplier?.longitude) {
        console.warn('Supplier has no coordinates')
        return
      }

      // Find offers near supplier for this product
      const offersData = await execute(
        NearestOffersDocument,
        {
          lat: supplier.latitude,
          lon: supplier.longitude,
          productUuid,
          radius: 500,
          limit: 12
        },
        'public',
        'geo'
      )

      relatedOffers.value = offersData?.nearestOffers || []

      // Load hubs near each offer and aggregate (limit to 12)
      const allHubs = new Map<string, any>()
      for (const offer of relatedOffers.value.slice(0, 3)) {
        // Check first 3 offers
        if (!offer.latitude || !offer.longitude) continue

        try {
          const hubsData = await execute(
            NearestHubsDocument,
            {
              lat: offer.latitude,
              lon: offer.longitude,
              radius: 1000,
              limit: 5
            },
            'public',
            'geo'
          )
          hubsData?.nearestHubs?.forEach((hub: any) => {
            if (!allHubs.has(hub.uuid)) {
              allHubs.set(hub.uuid, hub)
            }
          })
        } catch (e) {
          console.warn('Error loading hubs for offer:', offer.uuid, e)
        }

        if (allHubs.size >= 12) break
      }
      relatedHubs.value = Array.from(allHubs.values()).slice(0, 12)
    } catch (error) {
      console.error('Error loading offers for supplier:', error)
    }
  }

  // Select product (triggers offers loading)
  const selectProduct = async (productUuid: string) => {
    selectedProduct.value = productUuid

    if (!entity.value) return

    const entityType = entity.value.uuid
    if (!entityType) return

    // Load offers based on entity type
    if (entity.value.transportTypes) {
      // This is a hub (has transportTypes)
      await loadOffersForHub(entity.value.uuid, productUuid)
      activeTab.value = 'offers'
    } else if (entity.value.teamUuid || entity.value.onTimeRate !== undefined) {
      // This is a supplier
      await loadOffersForSupplier(entity.value.uuid, productUuid)
      activeTab.value = 'offers'
    }
  }

  // Set active tab
  const setActiveTab = (tab: string) => {
    activeTab.value = tab
  }

  // Main load method - dispatches to specific loaders
  const loadInfo = async (type: InfoEntityType, uuid: string) => {
    isLoading.value = true
    clearInfo() // Clear previous data

    try {
      if (type === 'hub') {
        await loadHubInfo(uuid)
      } else if (type === 'supplier') {
        await loadSupplierInfo(uuid)
      } else if (type === 'offer') {
        await loadOfferInfo(uuid)
      }
    } finally {
      isLoading.value = false
    }
  }

  // Clear all info data
  const clearInfo = () => {
    entity.value = null
    relatedProducts.value = []
    relatedHubs.value = []
    relatedSuppliers.value = []
    relatedOffers.value = []
    selectedProduct.value = null
    activeTab.value = 'products'
  }

  return {
    // State
    entity,
    relatedProducts,
    relatedHubs,
    relatedSuppliers,
    relatedOffers,
    selectedProduct,
    activeTab,
    isLoading,

    // Actions
    loadInfo,
    selectProduct,
    setActiveTab,
    clearInfo
  }
}