<?php
declare(strict_types=1);

namespace Controller;

use Model\User;
use View\TransferPage;
use View\MoneyFormatter;
use View\Sendable;

class TransferController extends RestrictedPageController
{
    public function __construct()
    {
        parent::__construct('/transfer.php');
    }

    protected function runLogic(): Sendable
    {
        $transferPage = new TransferPage($this->context);
        if ($transferPage->formWasSent) {
            $transferPage->fieldTarget = trim($transferPage->fieldTarget);
            $error = false;

            // find target user
            $targetUser = User::byName($transferPage->fieldTarget);
            if (empty($targetUser)) {
                $transferPage->errorTargetNotFound = true;
                $error = true;
            }

            // check amount
            $amount = MoneyFormatter::parseAmount($transferPage->fieldAmount);
            if ($amount === null) {
                $transferPage->errorAmountInvalid = true;
                $error = true;
            } elseif ($amount === 0) {
                $transferPage->errorAmountZero = true;
                $error = true;
            }

            // check text
            $text = $transferPage->fieldText;
            if (iconv_strlen($text) > 100) {
                $transferPage->errorTextTooLong = true;
                $error = true;
            }

            // create the actual bookings
            if (!$error) {
                $success = Transaction::run($this->context, function ($transaction) use ($targetUser, $amount, $text) {
                    $success = $transaction->createBooking($this->context->session->user, 3, -$amount, $targetUser, $text);
                    if ($success) {
                        $transaction->createBooking($targetUser, 4, $amount, $this->context->session->user, $text);
                    }
                    return $success;
                });
                if (!$success) {
                    $transferPage->errorInsufficientFunds = true;
                    $error = true;
                }
            }

            if (!$error) {
                $transferPage->fieldTarget = '';
                $transferPage->fieldAmount = '';
                $transferPage->fieldText = '';

                $transferPage->success = true;
                $transferPage->successTarget = $targetUser->name;
                $transferPage->successAmount = $amount;
            }
        }
        return $transferPage;
    }
}