import { ViewData } from '@/lib/contracts/view-data/ViewData';
import type { UserListResponse } from '@/lib/types/admin';
import { AdminUsersViewData } from '@/lib/view-data/AdminUsersViewData';

import { ViewDataBuilder } from "../../contracts/builders/ViewDataBuilder";

export class AdminUsersViewDataBuilder implements ViewDataBuilder<any, any> {
  build(input: any): any {
    return AdminUsersViewDataBuilder.build(input);
  }

  static build(
  public static build(apiDto: UserListResponse): AdminUsersViewData {
    const users = apiDto.users.map(u => ({
      ...u,
      joinedAt: new Date(u.joinedAt),
    }));

    return {
      users,
      total: apiDto.total,
      page: apiDto.page,
      limit: apiDto.limit,
      totalPages: apiDto.totalPages,
      // Pre-computed derived values for template
      activeUserCount: users.filter(u => u.status === 'active').length,
      adminCount: users.filter(u => u.isSystemAdmin).length,
    };
  }
}