<?php
namespace ABeCe\Booking\Service;
use ABeCe\Booking\Repository\PaymentTransactionsRepository;
use ABeCe\Booking\Support\Money;
/** Single source for all balances; persisted payment_status is only a projection. */
final class SettlementService {
 public function __construct(private readonly PaymentTransactionsRepository $payments){}
 public function calculate(array $b): array {
  $paid=0;$refunded=0;
  foreach($this->payments->forBooking($b['id']) as $t){if('completed'!==$t['status'])continue;
   if($t['currency']!==$b['currency']||$t['amount']<0)throw new \ABeCe\Booking\Domain\CatalogException('abece_booking_invalid_payment_ledger',__('The payment ledger does not match this booking. Contact an administrator.','abece-booking'),409);
   if('payment'===$t['transaction_type'])$paid=Money::add($paid,$t['amount']);elseif('refund'===$t['transaction_type'])$refunded=Money::add($refunded,$t['amount']);
  }
  return $this->fromTotals($b,$paid,$refunded);
 }
 /** Same calculation for batched receivables, without per-booking ledger reads. */
 public function fromTotals(array $b,int $paid,int $refunded,bool $invalid=false): array {
  if($invalid||$paid<0||$refunded<0||$paid>Money::MAX||$refunded>Money::MAX)throw new \ABeCe\Booking\Domain\CatalogException('abece_booking_invalid_payment_ledger',__('The payment ledger does not match this booking. Contact an administrator.','abece-booking'),409);
  $required=match($b['status']){'cancelled'=>$b['cancellation_fee'],'no_show'=>$b['no_show_fee'],'voided'=>0,default=>$b['final_amount']};
  $net=$paid-$refunded;$outstanding=max($required-$net,0);$due=max($net-$required,0);
  $status=$due?'refund_pending':($outstanding?($net>0?'partially_paid':'unpaid'):($refunded?($refunded===$paid?'refunded':'partially_refunded'):($paid?'paid':'not_required')));
  return ['required_amount'=>$required,'paid_amount'=>$paid,'refunded_amount'=>$refunded,'net_paid_amount'=>$net,'outstanding_amount'=>$outstanding,'refund_due'=>$due,'payment_status'=>$status];
 }
}