/**
 * Application Use Case: CreatePaymentUseCase
 *
 * Creates a new payment.
 */

import type { UseCase } from '@core/shared/application/UseCase';
import { Result } from '@core/shared/domain/Result';
import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
import type { PayerType, Payment, PaymentType } from '../../domain/entities/Payment';
import { PaymentStatus } from '../../domain/entities/Payment';
import type { PaymentRepository } from '../../domain/repositories/PaymentRepository';

export interface CreatePaymentInput {
  type: PaymentType;
  amount: number;
  payerId: string;
  payerType: PayerType;
  leagueId: string;
  seasonId?: string;
}

export interface CreatePaymentResult {
  payment: Payment;
}

export type CreatePaymentErrorCode = never;

export class CreatePaymentUseCase
  implements UseCase<CreatePaymentInput, CreatePaymentResult, CreatePaymentErrorCode>
{
  constructor(
    private readonly paymentRepository: PaymentRepository,
  ) {}

  async execute(input: CreatePaymentInput): Promise<Result<CreatePaymentResult, ApplicationErrorCode<CreatePaymentErrorCode>>> {
    const { type, amount, payerId, payerType, leagueId, seasonId } = input;

    // Calculate platform fee (assume 5% for now)
    const platformFee = Math.round(amount * 0.05 * 100) / 100;
    const netAmount = amount - platformFee;

    const id = `payment-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
    const payment: Payment = {
      id,
      type,
      amount,
      platformFee,
      netAmount,
      payerId,
      payerType,
      leagueId,
      status: PaymentStatus.PENDING,
      createdAt: new Date(),
      ...(seasonId !== undefined ? { seasonId } : {}),
    };

    const createdPayment = await this.paymentRepository.create(payment);

    return Result.ok({ payment: createdPayment });
  }
}