/**
 * ActivityLevelDisplay
 *
 * Deterministic mapping of engagement rates to activity level labels.
 */

export class ActivityLevelDisplay {
  /**
   * Maps engagement rate to activity level label.
   */
  static levelLabel(engagementRate: number): string {
    if (engagementRate < 20) {
      return 'Low';
    } else if (engagementRate < 50) {
      return 'Medium';
    } else {
      return 'High';
    }
  }

  /**
   * Maps engagement rate to activity level value.
   */
  static levelValue(engagementRate: number): 'low' | 'medium' | 'high' {
    if (engagementRate < 20) {
      return 'low';
    } else if (engagementRate < 50) {
      return 'medium';
    } else {
      return 'high';
    }
  }
}