/**
 * Use Case: AcceptSponsorshipRequestUseCase
 *
 * Allows an entity owner to accept a sponsorship request.
 * This creates an active sponsorship and notifies the sponsor.
 */

import type { Logger } from '@core/shared/application';
import type { ISponsorshipRequestRepository } from '../../domain/repositories/ISponsorshipRequestRepository';
import type { ISeasonSponsorshipRepository } from '../../domain/repositories/ISeasonSponsorshipRepository';
import type { ISeasonRepository } from '../../domain/repositories/ISeasonRepository';
import type { INotificationService } from '@core/notifications/application/ports/INotificationService';
import type { IPaymentGateway } from '../ports/IPaymentGateway';
import type { IWalletRepository } from '@core/payments/domain/repositories/IWalletRepository';
import type { ILeagueWalletRepository } from '../../domain/repositories/ILeagueWalletRepository';
import { SeasonSponsorship } from '../../domain/entities/SeasonSponsorship';
import type { AsyncUseCase } from '@core/shared/application';
import { Result } from '@core/shared/application/Result';
import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
import type { AcceptSponsorshipRequestDTO } from '../dto/AcceptSponsorshipRequestDTO';
import type { AcceptSponsorshipRequestResultDTO } from '../dto/AcceptSponsorshipRequestResultDTO';

export class AcceptSponsorshipRequestUseCase
  implements AsyncUseCase<AcceptSponsorshipRequestDTO, AcceptSponsorshipRequestResultDTO, string> {
  constructor(
    private readonly sponsorshipRequestRepo: ISponsorshipRequestRepository,
    private readonly seasonSponsorshipRepo: ISeasonSponsorshipRepository,
    private readonly seasonRepository: ISeasonRepository,
    private readonly notificationService: INotificationService,
    private readonly paymentGateway: IPaymentGateway,
    private readonly walletRepository: IWalletRepository,
    private readonly leagueWalletRepository: ILeagueWalletRepository,
    private readonly logger: Logger,
  ) {}

  async execute(dto: AcceptSponsorshipRequestDTO): Promise<Result<AcceptSponsorshipRequestResultDTO, ApplicationErrorCode<string>>> {
    this.logger.debug(`Attempting to accept sponsorship request: ${dto.requestId}`, { requestId: dto.requestId, respondedBy: dto.respondedBy });

    // Find the request
    const request = await this.sponsorshipRequestRepo.findById(dto.requestId);
    if (!request) {
      this.logger.warn(`Sponsorship request not found: ${dto.requestId}`, { requestId: dto.requestId });
      return Result.err({ code: 'SPONSORSHIP_REQUEST_NOT_FOUND' });
    }

    if (!request.isPending()) {
      this.logger.warn(`Cannot accept a ${request.status} sponsorship request: ${dto.requestId}`, { requestId: dto.requestId, status: request.status });
      return Result.err({ code: 'SPONSORSHIP_REQUEST_NOT_PENDING' });
    }

    this.logger.info(`Sponsorship request ${dto.requestId} found and is pending. Proceeding with acceptance.`, { requestId: dto.requestId });

    // Accept the request
    const acceptedRequest = request.accept(dto.respondedBy);
    await this.sponsorshipRequestRepo.update(acceptedRequest);
    this.logger.debug(`Sponsorship request ${dto.requestId} accepted and updated in repository.`, { requestId: dto.requestId });

    // If this is a season sponsorship, create the SeasonSponsorship record
    let sponsorshipId = `spons_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;

    if (request.entityType === 'season') {
      this.logger.debug(`Sponsorship request ${dto.requestId} is for a season. Creating SeasonSponsorship record.`, { requestId: dto.requestId, entityType: request.entityType });
      const season = await this.seasonRepository.findById(request.entityId);
      if (!season) {
        this.logger.warn(`Season not found for sponsorship request ${dto.requestId} and entityId ${request.entityId}`, { requestId: dto.requestId, entityId: request.entityId });
        return Result.err({ code: 'SEASON_NOT_FOUND' });
      }

      const sponsorship = SeasonSponsorship.create({
        id: sponsorshipId,
        seasonId: season.id,
        leagueId: season.leagueId,
        sponsorId: request.sponsorId,
        tier: request.tier,
        pricing: request.offeredAmount,
        status: 'active',
      });
      await this.seasonSponsorshipRepo.create(sponsorship);
      this.logger.info(`Season sponsorship ${sponsorshipId} created for request ${dto.requestId}.`, { sponsorshipId, requestId: dto.requestId });

      // Notify the sponsor
      await this.notificationService.sendNotification({
        recipientId: request.sponsorId,
        type: 'sponsorship_request_accepted',
        title: 'Sponsorship Accepted',
        body: `Your sponsorship request for ${season.name} has been accepted.`,
        channel: 'in_app',
        urgency: 'toast',
        data: {
          requestId: request.id,
          sponsorshipId,
        },
      });

      // Process payment
      const paymentResult = await this.paymentGateway.processPayment(
        request.offeredAmount,
        request.sponsorId,
        `Sponsorship payment for ${request.entityType} ${request.entityId}`,
        { requestId: request.id }
      );
      if (!paymentResult.success) {
        this.logger.error(`Payment failed for sponsorship request ${request.id}: ${paymentResult.error}`, undefined, { requestId: request.id });
        return Result.err({ code: 'PAYMENT_PROCESSING_FAILED' });
      }

      // Update wallets
      const sponsorWallet = await this.walletRepository.findById(request.sponsorId);
      if (!sponsorWallet) {
        this.logger.error(`Sponsor wallet not found for ${request.sponsorId}`, undefined, { sponsorId: request.sponsorId });
        return Result.err({ code: 'SPONSOR_WALLET_NOT_FOUND' });
      }

      const leagueWallet = await this.leagueWalletRepository.findById(season.leagueId);
      if (!leagueWallet) {
        this.logger.error(`League wallet not found for ${season.leagueId}`, undefined, { leagueId: season.leagueId });
        return Result.err({ code: 'LEAGUE_WALLET_NOT_FOUND' });
      }

      const netAmount = acceptedRequest.getNetAmount();

      // Deduct from sponsor wallet
      const updatedSponsorWallet = {
        ...sponsorWallet,
        balance: sponsorWallet.balance - request.offeredAmount.amount,
      };
      await this.walletRepository.update(updatedSponsorWallet);

      // Add to league wallet
      const updatedLeagueWallet = leagueWallet.addFunds(netAmount, paymentResult.transactionId!);
      await this.leagueWalletRepository.update(updatedLeagueWallet);
    }

    this.logger.info(`Sponsorship request ${acceptedRequest.id} successfully accepted.`, { requestId: acceptedRequest.id, sponsorshipId });

    return Result.ok({
      requestId: acceptedRequest.id,
      sponsorshipId,
      status: 'accepted',
      acceptedAt: acceptedRequest.respondedAt!,
      platformFee: acceptedRequest.getPlatformFee().amount,
      netAmount: acceptedRequest.getNetAmount().amount,
    });
  }
}
