<?php

namespace App\Services\Foreclosure;

/**
 * PHP port of unit_tests/branches/CRED-6043-foreclosure-logic/foreclosure_logic.js
 *
 * Mirrors the two logic blocks changed in CRED-6043 inside payment_v1.blade.php
 * so they can be exercised server-side via the test-runner API.
 */
class ForeclosureValidationService
{
    /**
     * Determines whether the payable-amount input should be locked (readonly).
     *
     * Mirrors:
     *   if (is_forclosure == 1) {
     *     if (interest_due_to_foreclose == 0 && penal_due_to_foreclose == 0) { lock }
     *   }
     */
    public function shouldLockPayableAmountField($is_forclosure, $interest_due_to_foreclose, $penal_due_to_foreclose): bool
    {
        if ($is_forclosure == 1) {
            if ($interest_due_to_foreclose == 0 && $penal_due_to_foreclose == 0) {
                return true;
            }
        }
        return false;
    }

    /**
     * Validates the payable amount before sharing a foreclosure payment link.
     *
     * Mirrors:
     *   if (payment_type == 'foreclosure') {
     *     if (bounce_charges > 0 || penal_charges > 0) {
     *       final_amount_payable = total_amount_due - (bounce_charges + penal_charges)
     *       if (payable_amount < final_amount_payable) { return false }
     *     }
     *   }
     *
     * @return array{ valid: bool, minimumAmount: float|null, alertMessage: string|null }
     */
    public function validateForeclosurePayableAmount(
        $payment_type,
        $payable_amount_for_link,
        $bounce_charges,
        $penal_charges,
        $total_amount_due
    ): array {
        if ($payment_type !== 'foreclosure') {
            return ['valid' => true, 'minimumAmount' => null, 'alertMessage' => null];
        }

        if ($bounce_charges > 0 || $penal_charges > 0) {
            $finalAmountPayable = (float)$total_amount_due - ((float)$bounce_charges + (float)$penal_charges);

            if ((float)$payable_amount_for_link < $finalAmountPayable) {
                return [
                    'valid'        => false,
                    'minimumAmount' => $finalAmountPayable,
                    'alertMessage' => 'The minimum amount payable is ' . $finalAmountPayable,
                ];
            }
        }

        return ['valid' => true, 'minimumAmount' => null, 'alertMessage' => null];
    }
}