import type { GetDriverProfileOutputDTO } from '@/lib/types/generated/GetDriverProfileOutputDTO';
import type { DriverProfileDriverSummaryDTO } from '@/lib/types/generated/DriverProfileDriverSummaryDTO';
import type { DriverProfileStatsDTO } from '@/lib/types/generated/DriverProfileStatsDTO';
import type { DriverProfileFinishDistributionDTO } from '@/lib/types/generated/DriverProfileFinishDistributionDTO';
import type { DriverProfileTeamMembershipDTO } from '@/lib/types/generated/DriverProfileTeamMembershipDTO';
import type { DriverProfileSocialSummaryDTO } from '@/lib/types/generated/DriverProfileSocialSummaryDTO';
import type { DriverProfileExtendedProfileDTO } from '@/lib/types/generated/DriverProfileExtendedProfileDTO';
import { DriverProfileViewModel } from '@/lib/view-models/DriverProfileViewModel';
import type {
  DriverProfileDriverSummaryViewModel,
  DriverProfileStatsViewModel,
  DriverProfileFinishDistributionViewModel,
  DriverProfileTeamMembershipViewModel,
  DriverProfileSocialSummaryViewModel,
  DriverProfileExtendedProfileViewModel,
} from '@/lib/view-models/DriverProfileViewModel';

/**
 * DriverProfileViewModelBuilder
 *
 * Transforms GetDriverProfileOutputDTO into DriverProfileViewModel.
 * Deterministic, side-effect free, no HTTP calls.
 */
export class DriverProfileViewModelBuilder {
  /**
   * Build ViewModel from API DTO
   * 
   * @param apiDto - The API transport DTO
   * @returns ViewModel ready for template
   */
  static build(apiDto: GetDriverProfileOutputDTO): DriverProfileViewModel {
    return new DriverProfileViewModel({
      currentDriver: apiDto.currentDriver ? this.transformCurrentDriver(apiDto.currentDriver) : null,
      stats: apiDto.stats ? this.transformStats(apiDto.stats) : null,
      finishDistribution: apiDto.finishDistribution ? this.transformFinishDistribution(apiDto.finishDistribution) : null,
      teamMemberships: apiDto.teamMemberships.map(m => this.transformTeamMembership(m)),
      socialSummary: this.transformSocialSummary(apiDto.socialSummary),
      extendedProfile: apiDto.extendedProfile ? this.transformExtendedProfile(apiDto.extendedProfile) : null,
    });
  }

  private static transformCurrentDriver(dto: DriverProfileDriverSummaryDTO): DriverProfileDriverSummaryViewModel {
    return {
      id: dto.id,
      name: dto.name,
      country: dto.country,
      avatarUrl: dto.avatarUrl || '', // Handle undefined
      iracingId: dto.iracingId || null,
      joinedAt: dto.joinedAt,
      rating: dto.rating ?? null,
      globalRank: dto.globalRank ?? null,
      consistency: dto.consistency ?? null,
      bio: dto.bio || null,
      totalDrivers: dto.totalDrivers ?? null,
    };
  }

  private static transformStats(dto: DriverProfileStatsDTO): DriverProfileStatsViewModel {
    return {
      totalRaces: dto.totalRaces,
      wins: dto.wins,
      podiums: dto.podiums,
      dnfs: dto.dnfs,
      avgFinish: dto.avgFinish ?? null,
      bestFinish: dto.bestFinish ?? null,
      worstFinish: dto.worstFinish ?? null,
      finishRate: dto.finishRate ?? null,
      winRate: dto.winRate ?? null,
      podiumRate: dto.podiumRate ?? null,
      percentile: dto.percentile ?? null,
      rating: dto.rating ?? null,
      consistency: dto.consistency ?? null,
      overallRank: dto.overallRank ?? null,
    };
  }

  private static transformFinishDistribution(dto: DriverProfileFinishDistributionDTO): DriverProfileFinishDistributionViewModel {
    return {
      totalRaces: dto.totalRaces,
      wins: dto.wins,
      podiums: dto.podiums,
      topTen: dto.topTen,
      dnfs: dto.dnfs,
      other: dto.other,
    };
  }

  private static transformTeamMembership(dto: DriverProfileTeamMembershipDTO): DriverProfileTeamMembershipViewModel {
    return {
      teamId: dto.teamId,
      teamName: dto.teamName,
      teamTag: dto.teamTag || null,
      role: dto.role,
      joinedAt: dto.joinedAt,
      isCurrent: dto.isCurrent,
    };
  }

  private static transformSocialSummary(dto: DriverProfileSocialSummaryDTO): DriverProfileSocialSummaryViewModel {
    return {
      friendsCount: dto.friendsCount,
      friends: dto.friends.map(f => ({
        id: f.id,
        name: f.name,
        country: f.country,
        avatarUrl: f.avatarUrl || '', // Handle undefined
      })),
    };
  }

  private static transformExtendedProfile(dto: DriverProfileExtendedProfileDTO): DriverProfileExtendedProfileViewModel {
    return {
      socialHandles: dto.socialHandles.map(h => ({
        platform: h.platform as any, // Type assertion - assuming valid platform
        handle: h.handle,
        url: h.url,
      })),
      achievements: dto.achievements.map(a => ({
        id: a.id,
        title: a.title,
        description: a.description,
        icon: a.icon as any, // Type assertion - assuming valid icon
        rarity: a.rarity as any, // Type assertion - assuming valid rarity
        earnedAt: a.earnedAt,
      })),
      racingStyle: dto.racingStyle,
      favoriteTrack: dto.favoriteTrack,
      favoriteCar: dto.favoriteCar,
      timezone: dto.timezone,
      availableHours: dto.availableHours,
      lookingForTeam: dto.lookingForTeam,
      openToRequests: dto.openToRequests,
    };
  }
}