import type { AuthUser } from './types.js';
import type { Vehicle } from '../types.js';
import { isInventoryVehicle } from '../routes/vehicles/model.js';

/** 当前库存为公共资产；非库存车辆继续遵守本人/部门权限。历史业务使用原权限过滤。 */
export function filterAssetVehiclesByPermission<T extends Vehicle>(items: T[], user: AuthUser): T[] {
  if (user.permissionLevel === 'full') return items;
  const authorized = new Set(filterByPermission(items, user));
  return items.filter(vehicle => isInventoryVehicle(vehicle) || authorized.has(vehicle));
}

/** 客户名称脱敏 */
export function maskCustomerName(name: string | null): string | null {
  if (!name) return name;
  const len = name.length;
  if (len <= 1) return '*';
  if (len <= 3) return name[0] + '*';
  if (len <= 6) return name.slice(0, 2) + '***' + name.slice(-1);
  return name.slice(0, 4) + '***' + name.slice(-2);
}

/** 对数据列表中的客户名称进行脱敏 */
export function maskCustomerNames<T>(items: T[]): T[] {
  return items.map(v => {
    const obj = v as any;
    const copy = { ...obj };
    if ('customer' in copy && copy.customer) copy.customer = maskCustomerName(copy.customer);
    if ('customerName' in copy && copy.customerName) copy.customerName = maskCustomerName(copy.customerName);
    if (copy.pendingDelivery) copy.pendingDelivery = {
      ...copy.pendingDelivery,
      customerName: maskCustomerName(copy.pendingDelivery.customerName),
    };
    return copy as T;
  });
}

/**
 * 通用权限过滤函数
 * 适配 CachedVehicle（department, manager, managerId）和 Vehicle（departmentName, customerManager, managerId）
 */
export function filterByPermission<T>(
  items: T[],
  user: AuthUser,
): T[] {
  if (user.permissionLevel === 'full') return items;

  if (user.permissionLevel === 'department') {
    return items.filter(v => {
      const obj = v as any;
      const dept = obj.departmentName || obj.department || null;
      return dept === user.depName;
    });
  }

  // personal: 仅看自己负责的车辆 (bd = userId)
  return items.filter(v => {
    const obj = v as any;
    return (user.managerIds ?? [user.userId]).includes(obj.managerId);
  });
}