<?php
namespace {
    if (!defined('WD')) {
        define('WD', dirname(__DIR__, 2));
    }
}

namespace objects {
    class users_o
    {
        public static array $calls = [];
        private bool $selected = false;
        public object $economic_customer;

        public function getUserByCustomerNumber(int $customer_number): self
        {
            self::$calls[] = 'select:' . $customer_number;
            $this->selected = true;

            return $this;
        }

        public function getCustomerName(int $customer_number): ?string
        {
            if (!$this->selected) {
                throw new \RuntimeException('Customer name requested before local customer selection.');
            }

            self::$calls[] = 'name:' . $customer_number;

            return 'KING FOOD DANMARK A/S';
        }

        public function getCustomerEcocomicData(?int $customer_number = null): self
        {
            if (!$this->selected) {
                throw new \RuntimeException('Economic customer requested before local customer selection.');
            }

            self::$calls[] = 'economic:' . (int)$customer_number;
            $this->economic_customer = (object)[
                'corporateIdentificationNumber' => '12345678',
            ];

            return $this;
        }
    }
}

namespace {
    require_once WD . '/modules/email/helpers/email_template.php';
    require_once WD . '/modules/email/templates/email_template_new_customer.php';

    function assert_true(bool $condition, string $message): void
    {
        if (!$condition) {
            throw new \RuntimeException($message);
        }
    }

    function cleanup_buffers_to(int $base_level): string
    {
        $output = '';
        while (ob_get_level() > $base_level) {
            $output .= (string)ob_get_clean();
        }

        return $output;
    }

    $base_level = ob_get_level();
    ob_start();

    try {
        $html = (new \email\templates\email_template_new_customer(
            12345678,
            'https://truckwash.io/auth/password-reset/mock-token',
        ))->generate_html();
        $leaked_output = cleanup_buffers_to($base_level);

        assert_true($leaked_output === '', 'Template generation must not leak buffered HTML output.');
        assert_true(
            str_contains($html, 'Tak for din registrering af KING FOOD DANMARK A/S (12345678) som kunde hos Truck Wash.'),
            'Template must render the selected customer name and CVR in the welcome intro.'
        );
        assert_true(
            \objects\users_o::$calls === ['select:12345678', 'name:12345678', 'economic:12345678'],
            'Template must select the local customer before reading customer details.'
        );
    } catch (\Throwable $exception) {
        $leaked_output = cleanup_buffers_to($base_level);
        fwrite(STDERR, $leaked_output);
        fwrite(STDERR, $exception->getMessage() . PHP_EOL);
        exit(1);
    }

    echo "\033[32m[PASS]\033[0m New customer email template renders without leaked output.\n";
    exit(0);
}