import { TestResult, TrendReport, Trend } from '../../types/reporting';

export class TrendAnalyzer {
  analyze(results: TestResult[]): TrendReport {
    return {
      totalTests: results.length,
      passRate: this.calculatePassRate(results),
      averageDuration: this.calculateAverageDuration(results),
      trends: this.calculateTrends(results)
    };
  }

  private calculatePassRate(results: TestResult[]): number {
    const passed = results.filter(r => r.status === 'passed').length;
    return (passed / results.length) * 100;
  }

  private calculateAverageDuration(results: TestResult[]): number {
    const totalDuration = results.reduce((sum, r) => sum + r.duration, 0);
    return totalDuration / results.length;
  }

  private calculateTrends(results: TestResult[]): Trend[] {
    const trends: Trend[] = [];
    const now = new Date();
    
    trends.push({
      date: now.toISOString(),
      passRate: this.calculatePassRate(results),
      duration: this.calculateAverageDuration(results)
    });
    
    return trends;
  }
}