team rating

core/racing/application/use-cases/RankingUseCase.ts

@@ -0,0 +1,91 @@
+/**
+ * Application Use Case: RankingUseCase
+ * 
+ * Computes driver rankings from real standings and results data.
+ * Orchestrates repositories to provide ranking data to presentation layer.
+ */
+
+import type { Logger } from '@core/shared/application';
+import type { IStandingRepository } from '../../domain/repositories/IStandingRepository';
+import type { IDriverRepository } from '../../domain/repositories/IDriverRepository';
+import type { IRankingUseCase, DriverRanking } from './IRankingUseCase';
+
+export class RankingUseCase implements IRankingUseCase {
+  constructor(
+    private readonly standingRepository: IStandingRepository,
+    private readonly driverRepository: IDriverRepository,
+    private readonly logger: Logger
+  ) {
+    this.logger.info('[RankingUseCase] Initialized with real data repositories');
+  }
+
+  async getAllDriverRankings(): Promise<DriverRanking[]> {
+    this.logger.debug('[RankingUseCase] Computing rankings from standings');
+
+    try {
+      // Get all standings from all leagues
+      const standings = await this.standingRepository.findAll();
+      
+      if (standings.length === 0) {
+        this.logger.warn('[RankingUseCase] No standings found');
+        return [];
+      }
+
+      // Get all drivers for name resolution
+      const drivers = await this.driverRepository.findAll();
+      const driverMap = new Map(drivers.map(d => [d.id, d]));
+
+      // Group standings by driver and aggregate stats
+      const driverStats = new Map<string, { 
+        rating: number; 
+        wins: number; 
+        races: number;
+        driverName?: string;
+      }>();
+
+      for (const standing of standings) {
+        const driverId = standing.driverId.toString();
+        const existing = driverStats.get(driverId) || { rating: 0, wins: 0, races: 0 };
+        
+        existing.races += standing.racesCompleted;
+        existing.wins += standing.wins;
+        
+        // Calculate rating from points and position
+        const baseRating = 1000;
+        const pointsBonus = standing.points.toNumber() * 2;
+        const positionBonus = Math.max(0, 50 - (standing.position.toNumber() * 2));
+        const winBonus = standing.wins * 100;
+        
+        existing.rating = Math.round(baseRating + pointsBonus + positionBonus + winBonus);
+        
+        // Add driver name if available
+        const driver = driverMap.get(driverId);
+        if (driver) {
+          existing.driverName = driver.name.toString();
+        }
+        
+        driverStats.set(driverId, existing);
+      }
+
+      // Convert to rankings
+      const rankings: DriverRanking[] = Array.from(driverStats.entries()).map(([driverId, stats]) => ({
+        driverId,
+        rating: stats.rating,
+        wins: stats.wins,
+        totalRaces: stats.races,
+        overallRank: null
+      }));
+
+      // Sort by rating descending and assign ranks
+      rankings.sort((a, b) => b.rating - a.rating);
+      rankings.forEach((r, idx) => r.overallRank = idx + 1);
+
+      this.logger.info(`[RankingUseCase] Computed rankings for ${rankings.length} drivers`);
+
+      return rankings;
+    } catch (error) {
+      this.logger.error('[RankingUseCase] Error computing rankings:', error instanceof Error ? error : new Error(String(error)));
+      throw error;
+    }
+  }
+}