import { useMemo } from 'react'
import { useStoreState } from '@/store'
import type { ConfigMenus } from '@/proxy/menus/models'

/**
 * Public site menu kaydi. Menuler `Pub` modulu altinda tutulur ve uygulama
 * konfigurasyonunun `menus.public` alaniyla tasinir; menu ucu `[Authorize]`
 * oldugu icin ziyaretci ayri bir istek atamaz.
 */
export interface PublicMenuItem {
  code: string
  displayName?: string
  url?: string
  icon?: string
  order: number
  parentCode?: string
  cssClass?: string
  target?: string
  requiredPermissionName?: string
}

export interface PublicMenuNode extends PublicMenuItem {
  children: PublicMenuNode[]
}

/** Ust menude bu sinifi tasiyan kayit duz baglanti yerine vurgulu buton olarak cizilir. */
export const PUBLIC_MENU_CTA_CLASS = 'cta'

/** Ust ve alt bilgiyi cizen Custom Component'lerin adlari. */
export const PUBLIC_HEADER_COMPONENT = 'PublicHeader'
export const PUBLIC_FOOTER_COMPONENT = 'PublicFooter'

const PUBLIC_MENU_HEADER_CODE = 'Pub.Header'

function buildChildren(
  items: PublicMenuItem[],
  parentCode: string,
  isVisible: (item: PublicMenuItem) => boolean,
): PublicMenuNode[] {
  return items
    .filter((item) => item.parentCode === parentCode && isVisible(item))
    .sort((left, right) => left.order - right.order)
    .map((item) => ({ ...item, children: buildChildren(items, item.code, isVisible) }))
}

/**
 * Ust menu baglantilarini menu agacindan turetir. Alt bilgi kendi Custom Component'inde
 * tasarlanir, menuden beslenmez.
 */
export function usePublicMenu() {
  const publicMenus = useStoreState(
    (state) => (state.abpConfig.config?.extraProperties?.['menus'] as ConfigMenus | undefined)?.public,
  )
  const grantedPolicies = useStoreState((state) => state.abpConfig.config?.auth?.grantedPolicies)

  return useMemo(() => {
    const items = Array.isArray(publicMenus) ? publicMenus : []
    const isVisible = (item: PublicMenuItem) =>
      !item.requiredPermissionName || grantedPolicies?.[item.requiredPermissionName] === true

    return { headerLinks: buildChildren(items, PUBLIC_MENU_HEADER_CODE, isVisible) }
  }, [publicMenus, grantedPolicies])
}