import { computed, ref } from 'vue'
import { defineStore } from 'pinia'
import {
  adminNavigation,
  filterAdminNavigation,
  getFirstNavigationLeaf,
} from '@/core/navigation/adminNavigation'
import { useAuthStore } from '@/core/auth/auth'

const LOCAL_FULL_ACCESS_STORAGE_KEY = 'baiyue-admin-local-full-access'

class LocalFullAccessPermissionSet extends Set<string> {
  override has(_permissionCode: string): boolean {
    return true
  }
}

export function isLocalFullAccessHost(hostname: string): boolean {
  return hostname === 'localhost' || hostname === '127.0.0.1' || hostname === '::1'
}

export const useAccessPreviewStore = defineStore('access-preview', () => {
  const auth = useAuthStore()
  const initialized = ref(false)
  const localFullAccessAvailable = import.meta.env.DEV
    && typeof window !== 'undefined'
    && isLocalFullAccessHost(window.location.hostname)
  const localFullAccessEnabled = ref(
    localFullAccessAvailable
    && window.localStorage.getItem(LOCAL_FULL_ACCESS_STORAGE_KEY) === 'true',
  )
  const permissionCodes = computed<ReadonlySet<string>>(() => (
    localFullAccessEnabled.value
      ? new LocalFullAccessPermissionSet(auth.permissionCodes)
      : auth.permissionCodes
  ))
  const permissionSignature = computed(() => (
    localFullAccessEnabled.value
      ? '__LOCAL_FULL_ACCESS__'
      : [...permissionCodes.value].sort().join('|')
  ))
  const filteredNavigation = computed(() => filterAdminNavigation(adminNavigation, permissionCodes.value))
  const firstAccessiblePath = computed(() => getFirstNavigationLeaf(filteredNavigation.value)?.path ?? null)

  function initializeAfterLogin() {
    initialized.value = auth.isAuthenticated
  }

  function can(permissionCode: string): boolean {
    return permissionCodes.value.has(permissionCode)
  }

  function setLocalFullAccessEnabled(enabled: boolean) {
    if (!localFullAccessAvailable) return
    localFullAccessEnabled.value = enabled
    if (enabled) window.localStorage.setItem(LOCAL_FULL_ACCESS_STORAGE_KEY, 'true')
    else window.localStorage.removeItem(LOCAL_FULL_ACCESS_STORAGE_KEY)
  }

  function toggleLocalFullAccess() {
    setLocalFullAccessEnabled(!localFullAccessEnabled.value)
  }

  function reset() {
    initialized.value = false
  }

  return {
    initialized,
    localFullAccessAvailable,
    localFullAccessEnabled,
    permissionCodes,
    permissionSignature,
    filteredNavigation,
    firstAccessiblePath,
    initializeAfterLogin,
    can,
    setLocalFullAccessEnabled,
    toggleLocalFullAccess,
    reset,
  }
})