import type { DropScorePolicy } from '@gridpilot/racing/domain/types/DropScorePolicy';
import type {
  ILeagueFullConfigPresenter,
  LeagueFullConfigData,
  LeagueConfigFormViewModel,
} from '@gridpilot/racing/application/presenters/ILeagueFullConfigPresenter';

export class LeagueFullConfigPresenter implements ILeagueFullConfigPresenter {
  private viewModel: LeagueConfigFormViewModel | null = null;

  reset(): void {
    this.viewModel = null;
  }

  present(data: LeagueFullConfigData): void {
    const { league, activeSeason, scoringConfig, game } = data;

    const patternId = scoringConfig?.scoringPresetId;

    const primaryChampionship =
      scoringConfig && scoringConfig.championships && scoringConfig.championships.length > 0
        ? scoringConfig.championships[0]
        : undefined;

    const dropPolicy = primaryChampionship?.dropScorePolicy ?? undefined;
    const dropPolicyForm = this.mapDropPolicy(dropPolicy);

    const defaultQualifyingMinutes = 30;
    const defaultMainRaceMinutes = 40;
    const mainRaceMinutes =
      typeof league.settings.sessionDuration === 'number'
        ? league.settings.sessionDuration
        : defaultMainRaceMinutes;
    const qualifyingMinutes = defaultQualifyingMinutes;

    const roundsPlanned = 8;

    let sessionCount = 2;
    if (primaryChampionship && Array.isArray(primaryChampionship.sessionTypes)) {
      sessionCount = primaryChampionship.sessionTypes.length;
    }

    const practiceMinutes = 20;
    const sprintRaceMinutes = patternId === 'sprint-main-driver' ? 20 : undefined;

    this.viewModel = {
      leagueId: league.id,
      basics: {
        name: league.name,
        description: league.description,
        visibility: 'public',
        gameId: game?.id ?? 'iracing',
      },
      structure: {
        mode: 'solo',
        maxDrivers: league.settings.maxDrivers ?? 32,
        multiClassEnabled: false,
      },
      championships: {
        enableDriverChampionship: true,
        enableTeamChampionship: false,
        enableNationsChampionship: false,
        enableTrophyChampionship: false,
      },
      scoring: {
        customScoringEnabled: !patternId,
        ...(patternId ? { patternId } : {}),
      },
      dropPolicy: dropPolicyForm,
      timings: {
        practiceMinutes,
        qualifyingMinutes,
        mainRaceMinutes,
        sessionCount,
        roundsPlanned,
        ...(typeof sprintRaceMinutes === 'number'
          ? { sprintRaceMinutes }
          : {}),
      },
      stewarding: {
        decisionMode: 'admin_only',
        requireDefense: true,
        defenseTimeLimit: 48,
        voteTimeLimit: 72,
        protestDeadlineHours: 72,
        stewardingClosesHours: 168,
        notifyAccusedOnProtest: true,
        notifyOnVoteRequired: true,
      },
    };
  }

  getViewModel(): LeagueConfigFormViewModel | null {
    if (!this.viewModel) {
      throw new Error('Presenter has not been called yet');
    }
    return this.viewModel;
  }

  private mapDropPolicy(policy: DropScorePolicy | undefined): { strategy: string; n?: number } {
    if (!policy || policy.strategy === 'none') {
      return { strategy: 'none' };
    }

    if (policy.strategy === 'bestNResults') {
      const n = typeof policy.count === 'number' ? policy.count : undefined;
      return n !== undefined ? { strategy: 'bestNResults', n } : { strategy: 'none' };
    }

    if (policy.strategy === 'dropWorstN') {
      const n = typeof policy.dropCount === 'number' ? policy.dropCount : undefined;
      return n !== undefined ? { strategy: 'dropWorstN', n } : { strategy: 'none' };
    }

    return { strategy: 'none' };
  }
}