import { defineStore } from 'pinia'
import { getMyMenus } from '@/services/menuService'

let pendingMenuRequest = null

function extractErrorMessage(error) {
  const fallback = 'Gagal memuat menu.'
  const data = error?.response?.data

  if (!data) return error?.message || fallback
  if (typeof data?.message === 'string') return data.message

  return fallback
}

function mapMenuItem(item, isChild = false) {
  const hasChildren = Array.isArray(item?.children) && item.children.filter(Boolean).length > 0
  const name = item?.name || 'Untitled'
  const to = item?.url || '#'

  if (hasChildren) {
    return {
      component: 'CNavGroup',
      name,
      to,
      ...(isChild ? {} : { icon: item?.icon || 'cil-menu' }),
      items: item.children.filter(Boolean).map((child) => mapMenuItem(child, true)),
    }
  }

  return {
    component: 'CNavItem',
    name,
    to,
    ...(isChild ? {} : { icon: item?.icon || 'cil-menu' }),
  }
}

export const useMenuStore = defineStore('menu', {
  state: () => ({
    isMaster: false,
    dynamicMenus: [],
    loading: false,
    error: null,
    initialized: false,
  }),

  getters: {
    mappedMenus(state) {
      return state.dynamicMenus.map((item) => mapMenuItem(item))
    },
  },

  actions: {
    async fetchMenus({ force = false } = {}) {
      if (this.initialized && !force) {
        return this.dynamicMenus
      }

      if (pendingMenuRequest) {
        return pendingMenuRequest
      }

      this.loading = true
      this.error = null

      pendingMenuRequest = (async () => {
        try {
          const response = await getMyMenus()
          const payload = response?.data || {}

          this.isMaster = !!payload?.is_master
          this.dynamicMenus = Array.isArray(payload?.menus) ? payload.menus : []
          this.initialized = true

          return this.dynamicMenus
        } catch (error) {
          this.error = extractErrorMessage(error)
          this.initialized = false
          this.dynamicMenus = []
          throw error
        } finally {
          this.loading = false
          pendingMenuRequest = null
        }
      })()

      return pendingMenuRequest
    },

    reset() {
      this.isMaster = false
      this.dynamicMenus = []
      this.loading = false
      this.error = null
      this.initialized = false
      pendingMenuRequest = null
    },
  },
})