import { NavigationTree } from '@/proxy/menus/navigation'
import {
  NAV_ITEM_TYPE_COLLAPSE,
  NAV_ITEM_TYPE_ITEM,
  NAV_ITEM_TYPE_TITLE,
} from '@/constants/navigation.constant'
import { MenuDto } from '@/proxy/menus/models'

export function navigationTreeToFlat(items: NavigationTree[]): NavigationTree[] {
  const result: NavigationTree[] = []

  const traverse = (nodes: NavigationTree[]) => {
    for (const node of nodes) {
      const { subMenu, ...rest } = node
      result.push(rest as NavigationTree)

      if (subMenu && subMenu.length > 0) {
        traverse(subMenu)
      }
    }
  }

  traverse(items)
  return result
}

export default function getChildren(menu: MenuDto[], parentCode: string | null): NavigationTree[] {
  const menus: NavigationTree[] = []
  for (const child of menu.filter((a) => a.parentCode === parentCode)) {
    const item: NavigationTree = {
      key: child.url?.length ? child.url : (child.code ?? ''),
      path: child.url ?? '',
      title: child.displayName ?? '',
      icon: child.icon ?? '',
      type: NAV_ITEM_TYPE_TITLE,
      translateKey: child.displayName ?? '',
      authority: [child.requiredPermissionName ?? ''],
      subMenu: [],
      shortName: child.shortName ?? '',
    }

    if (child.code) {
      const subMenu = getChildren(menu, child.code)
      if (subMenu.length) {
        item.subMenu = subMenu
        item.type = child.parentCode ? NAV_ITEM_TYPE_COLLAPSE : NAV_ITEM_TYPE_TITLE
      } else {
        item.type = NAV_ITEM_TYPE_ITEM
      }

      //Eğer submenu veya path varsa menude gösterilmeli.
      //Yani submenüde biri gösterilecekse ana menüsü gösterilmeli
      if (item.subMenu.length > 0 || item.path !== '') {
        menus.push(item)
      }
    }
  }

  return menus
}