import { RouteRecordRaw } from 'vue-router';
import { dynamicImportRoute, getComponent } from '/nerv-base/router/helper/view-helper';
import { routeModule } from '/nerv-base/router/routes';

export interface RouteMenu {
  code: string; //组件名
  name?: string;
  label: string;
  sort: number;
  parentCode?: string;
  backApi?: Recordable[]; //组件内所使用的Api
  route?: RouteRecordRaw;
  menus?: RouteMenu[];
  type?: string; //三种类型 menus菜单 noChildrenMenu不渲染该菜单下的子菜单 op操作
}

/***
 * 转换权限菜单到路由
 * @param menu
 * @param parentCode
 */
export function transformMenuToRoute(menu: RouteMenu, parentCode = '') {
  const { route, menus } = menu;
  if (route.component) {
    route.component = dynamicImportRoute(route.component);
  }

  const _route: RouteRecordRaw = {
    ...route,
  };
  if (menus) {
    _route.children = transformMenus(menus);
  }
  return _route;
}

/***
 * 转换权限菜单列表到路由列表
 * @param menus
 */
export function transformMenus(menus: RouteMenu[]): RouteRecordRaw[] {
  const list = [];
  for (let i = 0, l = menus.length; i < l; i++) {
    list.push(transformMenuToRoute(menus[i]));
  }
  return list;
}

export function sortMenu(menus: RouteMenu[]) {
  menus.sort((a: RouteMenu, b: RouteMenu) => {
    return a.sort - b.sort;
  });
  return menus;
}

export function dropMenu(menus, info) {
  const { dragNode: menu, node: target, dropToGap, dropPosition } = info;
  if (
    (target.parentCode !== menu.parentCode && target.code !== menu.parentCode) ||
    (target.parentCode !== '' && dropToGap === false)
  ) {
    return {
      success: false,
      msg: '只在栏目内移动',
    };
  }
  const list = getMenusArray(menus, menu);
  // 移到当前栏目最顶部
  if (target.code === menu.parentCode) {
  }

  moveMenuItem(list, menu.code, dropPosition, dropToGap);

  return {
    success: true,
    menus,
  };
}

/**
 * 获得移动的最终数组对象
 * @param menus
 * @param menu
 */
export function getMenusArray(menus, menu) {
  let list: RouteMenu[] = [];
  const index = -1;

  function _getMenuArray(menus, menu) {
    for (let i = 0, l = menus.length; i < l; i++) {
      if (menus[i].code === menu.parentCode) {
        list = menus[i];
        return;
      } else if (menus[i].menus) {
        _getMenuArray(menus[i].menus, menu);
      }
    }
  }

  if (menu.parentCode === '') {
    return menus;
  }
  _getMenuArray(menus, menu);

  return list.menus;
}

/**
 * 数组内移动
 * @param menus
 * @param dragNodeCode
 * @param dropPosition
 * @param dropToGap
 */
function moveMenuItem(menus, dragNodeCode, dropPosition, dropToGap) {
  const index = menus.findIndex((item) => dragNodeCode === item.code);
  const _menus = menus.splice(index, 1);
  if (dropToGap === false) {
    menus.unshift(_menus[0]);
  } else {
    if (index < dropPosition) {
      dropPosition--;
    }
    if (dropPosition === -1) dropPosition = 0;
    menus.splice(dropPosition, 0, _menus[0]);
  }
  for (let i = 0, l = menus.length; i < l; i++) {
    menus[i].sort = i + 1;
  }
}

export function editMenuLabel(menus: RouteMenu[], code: string, newLabel: string) {
  for (let i = 0, l = menus.length; i < l; i++) {
    if (menus[i].code === code) {
      menus[i].label = newLabel;
      // menus[i].route.meta.title = newLabel;
      return;
    }
    if (menus[i].menus) {
      editMenuLabel(menus[i].menus as RouteMenu[], code, newLabel);
    }
  }
}