refactor to adapters

testing/fakes/racing/DemoDriverStats.ts

@@ -0,0 +1,75 @@
+/**
+ * Driver statistics and ranking data used for demo seeding.
+ * Split out from the legacy DemoData module to keep responsibilities focused.
+ */
+export interface DriverStats {
+  driverId: string;
+  rating: number;
+  totalRaces: number;
+  wins: number;
+  podiums: number;
+  dnfs: number;
+  avgFinish: number;
+  bestFinish: number;
+  worstFinish: number;
+  consistency: number;
+  overallRank: number;
+  percentile: number;
+}
+
+/**
+ * Create demo driver statistics based on seed data.
+ * This is deterministic for a given driver ordering so it can be reused
+ * by any in-memory repository wiring.
+ */
+export function createDemoDriverStats(drivers: Array<{ id: string }>): Record<string, DriverStats> {
+  const stats: Record<string, DriverStats> = {};
+
+  drivers.forEach((driver, index) => {
+    const totalRaces = 40 + index * 5;
+    const wins = Math.max(0, Math.floor(totalRaces * 0.2) - index);
+    const podiums = Math.max(wins * 2, 0);
+    const dnfs = Math.max(0, Math.floor(index / 2));
+    const rating = 1500 + index * 25;
+
+    stats[driver.id] = {
+      driverId: driver.id,
+      rating,
+      totalRaces,
+      wins,
+      podiums,
+      dnfs,
+      avgFinish: 4,
+      bestFinish: 1,
+      worstFinish: 20,
+      consistency: 80,
+      overallRank: index + 1,
+      percentile: Math.max(0, 100 - index),
+    };
+  });
+
+  return stats;
+}
+
+/**
+ * Get league-specific rankings for a driver (demo implementation).
+ * In production this would be calculated from actual league membership
+ * and results; here we keep a very small static example for UI wiring.
+ */
+export function getDemoLeagueRankings(driverId: string, leagueId: string): {
+  rank: number;
+  totalDrivers: number;
+  percentile: number;
+} {
+  // Mock league rankings (in production, calculate from actual league membership)
+  const mockLeagueRanks: Record<string, Record<string, any>> = {
+    'league-1': {
+      'driver-1': { rank: 1, totalDrivers: 12, percentile: 92 },
+      'driver-2': { rank: 2, totalDrivers: 12, percentile: 84 },
+      'driver-3': { rank: 4, totalDrivers: 12, percentile: 67 },
+      'driver-4': { rank: 5, totalDrivers: 12, percentile: 58 },
+    },
+  };
+
+  return mockLeagueRanks[leagueId]?.[driverId] || { rank: 0, totalDrivers: 0, percentile: 0 };
+}