import { computed, ref } from 'vue'
import { defineStore } from 'pinia'
import { useProvidersStore, useServicesStore, useNodesStore, ROOT_ID } from '@DocumentsManager/stores'
import { CollectionObject } from '@DocumentsManager/models/collection'
import { EntityObject } from '@DocumentsManager/models/entity'
import type { SortField, SortOrder, ViewMode, BreadcrumbItem } from '@/types'

type NodeRecord = CollectionObject | EntityObject

export const useDocumentsStore = defineStore('documentsStore', () => {
  const providersStore = useProvidersStore()
  const servicesStore = useServicesStore()
  const nodesStore = useNodesStore()

  const activeProviderId = ref('default')
  const activeServiceId = ref<string | number>('personal')
  const currentLocation = ref<string>(ROOT_ID)

  const viewMode = ref<ViewMode>('grid')
  const sortField = ref<SortField>('label')
  const sortOrder = ref<SortOrder>('asc')
  const searchQuery = ref('')
  const sidebarVisible = ref(true)

  const transceiving = computed(() =>
    providersStore.transceiving || servicesStore.transceiving || nodesStore.transceiving,
  )

  const provider = computed(() => providersStore.provider(activeProviderId.value))
  const service = computed(() => servicesStore.service(activeProviderId.value, activeServiceId.value))

  const currentCollections = computed(() =>
    nodesStore.getChildCollections(activeProviderId.value, activeServiceId.value, currentLocation.value),
  )

  const currentEntities = computed(() =>
    nodesStore.getChildEntities(activeProviderId.value, activeServiceId.value, currentLocation.value),
  )

  const breadcrumbs = computed<BreadcrumbItem[]>(() => {
    const nodes = nodesStore.getPath(activeProviderId.value, activeServiceId.value, currentLocation.value)
    return [
      { id: ROOT_ID, label: 'Home', isRoot: true },
      ...nodes.map((node) => ({
        id: String(node.identifier),
        label: node.properties.label,
        isRoot: false,
      })),
    ]
  })

  function sortCollections(items: CollectionObject[]): CollectionObject[] {
    return [...items].sort((a, b) => {
      const aVal = sortField.value === 'label'
        ? a.properties.label
        : sortField.value === 'modifiedOn'
          ? (a.modified?.getTime() ?? 0)
          : sortField.value === 'createdOn'
            ? (a.created?.getTime() ?? 0)
            : ''
      const bVal = sortField.value === 'label'
        ? b.properties.label
        : sortField.value === 'modifiedOn'
          ? (b.modified?.getTime() ?? 0)
          : sortField.value === 'createdOn'
            ? (b.created?.getTime() ?? 0)
            : ''

      const cmp = String(aVal).localeCompare(String(bVal))
      return sortOrder.value === 'asc' ? cmp : -cmp
    })
  }

  function sortEntities(items: EntityObject[]): EntityObject[] {
    return [...items].sort((a, b) => {
      const aVal = sortField.value === 'label'
        ? a.properties.label
        : sortField.value === 'mime'
          ? (a.properties.mime ?? '')
          : sortField.value === 'size'
            ? a.properties.size
            : sortField.value === 'modifiedOn'
              ? (a.modified?.getTime() ?? 0)
              : sortField.value === 'createdOn'
                ? (a.created?.getTime() ?? 0)
                : ''
      const bVal = sortField.value === 'label'
        ? b.properties.label
        : sortField.value === 'mime'
          ? (b.properties.mime ?? '')
          : sortField.value === 'size'
            ? b.properties.size
            : sortField.value === 'modifiedOn'
              ? (b.modified?.getTime() ?? 0)
              : sortField.value === 'createdOn'
                ? (b.created?.getTime() ?? 0)
                : ''

      const cmp = String(aVal).localeCompare(String(bVal))
      return sortOrder.value === 'asc' ? cmp : -cmp
    })
  }

  function filterNode(node: NodeRecord): boolean {
    if (!searchQuery.value) return true
    return node.properties.label.toLowerCase().includes(searchQuery.value.toLowerCase())
  }

  const sortedItems = computed(() => ({
    collections: sortCollections(currentCollections.value).filter(filterNode),
    entities: sortEntities(currentEntities.value).filter(filterNode),
  }))

  const hasItems = computed(() =>
    sortedItems.value.collections.length > 0 || sortedItems.value.entities.length > 0,
  )

  const isAtRoot = computed(() => currentLocation.value === ROOT_ID)

  async function initialize() {
    await providersStore.list()
    await servicesStore.list({ [activeProviderId.value]: true })
    await refresh()
  }

  async function refresh() {
    await nodesStore.fetchNodes(activeProviderId.value, activeServiceId.value, currentLocation.value)
  }

  async function navigateTo(collectionId: string | null) {
    currentLocation.value = collectionId || ROOT_ID
    await refresh()
  }

  async function navigateToRoot() {
    await navigateTo(ROOT_ID)
  }

  async function navigateUp() {
    if (currentLocation.value === ROOT_ID) return
    const currentNode = nodesStore.getNode(activeProviderId.value, activeServiceId.value, currentLocation.value)
    if (!currentNode) return
    const parentId = currentNode.collection ? String(currentNode.collection) : ROOT_ID
    await navigateTo(parentId)
  }

  async function createFolder(label: string) {
    await nodesStore.createCollection(
      activeProviderId.value,
      activeServiceId.value,
      currentLocation.value,
      { label, owner: '' },
    )
    await refresh()
  }

  async function renameNode(node: NodeRecord, label: string) {
    if (node instanceof CollectionObject) {
      await nodesStore.updateCollection(
        activeProviderId.value,
        activeServiceId.value,
        node.identifier,
        { label, owner: node.properties.owner },
      )
    } else {
      await nodesStore.updateEntity(
        activeProviderId.value,
        activeServiceId.value,
        node.collection,
        node.identifier,
        {
          '@type': 'documents.properties',
          urid: node.properties.urid,
          size: node.properties.size,
          label,
          mime: node.properties.mime,
          format: node.properties.format,
          encoding: node.properties.encoding,
        },
      )
    }
    await refresh()
  }

  async function deleteNode(node: NodeRecord) {
    if (node instanceof CollectionObject) {
      await nodesStore.deleteCollection(activeProviderId.value, activeServiceId.value, node.identifier)
    } else {
      await nodesStore.deleteEntity(activeProviderId.value, activeServiceId.value, node.collection, node.identifier)
    }
    await refresh()
  }

  return {
    activeProviderId,
    activeServiceId,
    currentLocation,
    viewMode,
    sortField,
    sortOrder,
    searchQuery,
    sidebarVisible,
    transceiving,
    provider,
    service,
    currentCollections,
    currentEntities,
    sortedItems,
    hasItems,
    breadcrumbs,
    isAtRoot,
    initialize,
    refresh,
    navigateTo,
    navigateToRoot,
    navigateUp,
    createFolder,
    renameNode,
    deleteNode,
    ROOT_ID,
  }
})