import { ViewModel } from "../contracts/view-models/ViewModel";
import { FinishFormatter } from "../formatters/FinishFormatter";
import type { StandingEntryViewData } from "../view-data/StandingEntryViewData";

export class StandingEntryViewModel extends ViewModel {
  private readonly data: StandingEntryViewData;

  constructor(data: StandingEntryViewData) {
    super();
    this.data = data;
  }

  get driverId(): string { return this.data.driverId; }
  get position(): number { return this.data.position; }
  get points(): number { return this.data.points; }
  get wins(): number { return this.data.wins; }
  get podiums(): number { return this.data.podiums; }
  get races(): number { return this.data.races; }
  get driver(): any { return this.data.driver; }

  /** UI-specific: Badge for position display */
  get positionBadge(): string {
    return FinishFormatter.format(this.position);
  }

  /** UI-specific: Points difference to leader */
  get pointsGapToLeader(): number {
    return this.points - this.data.leaderPoints;
  }

  /** UI-specific: Points difference to next position */
  get pointsGapToNext(): number {
    return this.points - this.data.nextPoints;
  }

  /** UI-specific: Whether this entry is the current user */
  get isCurrentUser(): boolean {
    return this.driverId === this.data.currentUserId;
  }

  /** UI-specific: Trend compared to previous */
  get trend(): 'up' | 'down' | 'same' {
    if (!this.data.previousPosition) return 'same';
    if (this.position < this.data.previousPosition) return 'up';
    if (this.position > this.data.previousPosition) return 'down';
    return 'same';
  }

  /** UI-specific: Arrow for trend */
  get trendArrow(): string {
    switch (this.trend) {
      case 'up': return '↑';
      case 'down': return '↓';
      default: return '-';
    }
  }
}