import type { SponsorDashboardDTO } from '@/lib/types/generated/SponsorDashboardDTO';
import type { SponsorDashboardViewData } from '@/lib/view-data/SponsorDashboardViewData';

/**
 * Sponsor Dashboard ViewData Builder
 *
 * Transforms SponsorDashboardDTO into ViewData for templates.
 * Deterministic and side-effect free.
 */
export class SponsorDashboardViewDataBuilder {
  static build(apiDto: SponsorDashboardDTO): SponsorDashboardViewData {
    return {
      sponsorName: apiDto.sponsorName,
      totalImpressions: apiDto.metrics.impressions.toString(),
      totalInvestment: `$${apiDto.investment.activeSponsorships * 1000}`, // Mock calculation
      metrics: {
        impressionsChange: apiDto.metrics.impressions > 1000 ? 15 : -5,
        viewersChange: 8,
        exposureChange: 12,
      },
      categoryData: {
        leagues: { count: 2, impressions: 1500 },
        teams: { count: 1, impressions: 800 },
        drivers: { count: 3, impressions: 2200 },
        races: { count: 1, impressions: 500 },
        platform: { count: 0, impressions: 0 },
      },
      sponsorships: apiDto.sponsorships,
      activeSponsorships: apiDto.investment.activeSponsorships,
      formattedTotalInvestment: `$${apiDto.investment.activeSponsorships * 1000}`,
      costPerThousandViews: '$50',
      upcomingRenewals: [], // Mock empty for now
      recentActivity: [], // Mock empty for now
    };
  }
}