import { useRoute } from 'vue-router'
import { storeToRefs } from 'pinia'
import { useUserStore } from '@/store/modules/user'
import { useAppMode } from '@/hooks/core/useAppMode'

function extractRouteAuthMarks(authList) {
  if (!Array.isArray(authList)) {
    return []
  }

  return authList
    .map((item) => {
      if (typeof item === 'string') {
        return item
      }
      if (item && typeof item === 'object') {
        return item.authMark || ''
      }
      return ''
    })
    .filter(Boolean)
}

function extractUserButtons(info) {
  return Array.isArray(info?.buttons) ? info.buttons : []
}

const BUTTON_ACTION_MAP = {
  query: 'list',
  add: 'save',
  edit: 'update',
  delete: 'remove'
}

function resolveRouteResourceKey(routePath) {
  const pathSegments = String(routePath || '')
    .split('/')
    .filter(Boolean)

  const rawSegment = pathSegments[pathSegments.length - 1]
  if (!rawSegment) {
    return ''
  }

  return rawSegment.replace(/-([a-z])/g, (_, letter) => letter.toUpperCase())
}

function matchesBackendButton(requiredAuth, buttons, routePath) {
  if (buttons.includes(requiredAuth)) {
    return true
  }

  const action = BUTTON_ACTION_MAP[requiredAuth]
  const resourceKey = resolveRouteResourceKey(routePath)
  if (!action || !resourceKey) {
    return false
  }

  return buttons.some(
    (item) =>
      typeof item === 'string' && item.includes(`:${resourceKey}:`) && item.endsWith(`:${action}`)
  )
}

function hasAuthPermission(
  requiredAuth,
  { authList = [], buttons = [], isBackendMode = false, routePath = '' } = {}
) {
  const requiredList = Array.isArray(requiredAuth) ? requiredAuth : [requiredAuth]

  if (!requiredList.length) {
    return true
  }

  if (isBackendMode) {
    return requiredList.some((item) => matchesBackendButton(item, buttons, routePath))
  }

  return requiredList.some((item) => authList.includes(item))
}

const useAuth = () => {
  const userStore = useUserStore()
  const route = useRoute()
  const { isBackendMode } = useAppMode()
  const { info } = storeToRefs(userStore)
  const authList = computed(() => extractRouteAuthMarks(route.meta.authList))
  const buttons = computed(() => extractUserButtons(info.value))
  const hasAuth = (auth) => {
    return hasAuthPermission(auth, {
      authList: authList.value,
      buttons: buttons.value,
      isBackendMode: isBackendMode.value,
      routePath: route.path
    })
  }
  return {
    hasAuth
  }
}
export {
  extractRouteAuthMarks,
  extractUserButtons,
  hasAuthPermission,
  resolveRouteResourceKey,
  useAuth
}