// src/cost/usage-tracker.ts
interface GenerationRecord {
  timestamp: string;
  fileKey: string;
  nodeId: string;
  cached: boolean;
  durationMs: number;
}

class AnimaUsageTracker {
  private records: GenerationRecord[] = [];

  record(entry: GenerationRecord): void { this.records.push(entry); }

  getReport(): { total: number; cached: number; savings: string } {
    const total = this.records.length;
    const cached = this.records.filter(r => r.cached).length;
    return {
      total,
      cached,
      savings: total > 0 ? `${((cached / total) * 100).toFixed(0)}% saved by caching` : 'No data',
    };
  }
}

// Only generate when:
// 1. Figma file version changed (check via Figma API)
// 2. Cache is expired (>1 hour for active dev, >24h for CI)
// 3. Settings changed (new framework/styling)
// 4. Force flag passed (manual override)

async function shouldGenerate(
  fileKey: string,
  nodeId: string,
  cache: any,
): Promise<boolean> {
  // Check cache first
  const cached = cache.get(fileKey, nodeId);
  if (cached && Date.now() - new Date(cached.generatedAt).getTime() < 3600000) {
    console.log('Using cached generation (< 1 hour old)');
    return false;
  }
  return true;
}