<?php

declare(strict_types=1);

namespace Tests;

use PHPUnit\Framework\TestCase;

require_once __DIR__ . '/../includes/Kiosk.php';

/**
 * Datenbank-Attrappe: liefert feste Zählwerte und Einstellungen.
 */
class FakeKioskDb
{
    public int $usedToday = 0;
    /** @var array<string, string> */
    private array $settings;

    /** @param array<string, string> $settings */
    public function __construct(array $settings = [])
    {
        $this->settings = $settings;
    }

    public function fetchOne($sql, $params = [])
    {
        return ['c' => $this->usedToday];
    }

    public function getSetting($key, $default = null)
    {
        return $this->settings[$key] ?? $default;
    }
}

/**
 * Die Grenzen der Kiosk-Seite sind das, was sie vor Missbrauch schützt –
 * der Link ist öffentlich, also muss diese Logik stimmen.
 */
class KioskTest extends TestCase
{
    /** @param array<string, mixed> $overrides */
    private function kiosk(array $overrides = []): array
    {
        return array_merge([
            'id' => 1,
            'daily_limit' => 100,
            'cooldown_seconds' => 20,
            'last_used_at' => null,
        ], $overrides);
    }

    public function testTokenHasFixedShape(): void
    {
        $token = \Kiosk::newToken();

        $this->assertMatchesRegularExpression('/^[0-9a-f]{32}$/', $token);
        $this->assertNotSame($token, \Kiosk::newToken(), 'Tokens dürfen sich nicht wiederholen');
    }

    public function testSanitizeTokenRejectsAnythingElse(): void
    {
        $valid = \Kiosk::newToken();

        $this->assertSame($valid, \Kiosk::sanitizeToken($valid));
        $this->assertSame($valid, \Kiosk::sanitizeToken(strtoupper($valid)));
        $this->assertSame('', \Kiosk::sanitizeToken('kurz'));
        $this->assertSame('', \Kiosk::sanitizeToken("' OR 1=1 --"));
        $this->assertSame('', \Kiosk::sanitizeToken(null));
        $this->assertSame('', \Kiosk::sanitizeToken($valid . 'ff'));
    }

    public function testCooldownBlocksSecondCode(): void
    {
        $db = new FakeKioskDb();
        $kiosk = $this->kiosk(['last_used_at' => date('Y-m-d H:i:s', time() - 5)]);

        $result = \Kiosk::checkLimits($db, $kiosk);

        $this->assertFalse($result['allowed']);
        $this->assertSame('cooldown', $result['reason']);
        $this->assertGreaterThan(0, $result['wait']);
        $this->assertLessThanOrEqual(20, $result['wait']);
    }

    public function testCooldownExpires(): void
    {
        $db = new FakeKioskDb();
        $kiosk = $this->kiosk(['last_used_at' => date('Y-m-d H:i:s', time() - 60)]);

        $this->assertTrue(\Kiosk::checkLimits($db, $kiosk)['allowed']);
    }

    public function testDailyLimitBlocks(): void
    {
        $db = new FakeKioskDb();
        $db->usedToday = 100;

        $result = \Kiosk::checkLimits($db, $this->kiosk());

        $this->assertFalse($result['allowed']);
        $this->assertSame('daily_limit', $result['reason']);
    }

    public function testZeroMeansUnlimited(): void
    {
        $db = new FakeKioskDb();
        $db->usedToday = 5000;

        $kiosk = $this->kiosk(['daily_limit' => 0, 'cooldown_seconds' => 0]);

        $this->assertTrue(\Kiosk::checkLimits($db, $kiosk)['allowed']);
    }

    public function testVoucherSettingsPreferTemplate(): void
    {
        $db = new FakeKioskDb(['default_max_uses' => '1', 'default_expire_minutes' => '480']);
        $kiosk = $this->kiosk([
            'tpl_max_uses' => 5,
            'tpl_expire_minutes' => 240,
            'qos_rate_max_down' => 20000,
            'qos_rate_max_up' => 5000,
            'qos_usage_quota' => 1024,
        ]);

        $settings = \Kiosk::voucherSettings($db, $kiosk);

        $this->assertSame(5, $settings['max_uses']);
        $this->assertSame(240, $settings['expire_minutes']);
        $this->assertSame(20000, $settings['qos']['down']);
        $this->assertSame(1024, $settings['qos']['quota_mb']);
    }

    public function testVoucherSettingsFallBackToDefaults(): void
    {
        $db = new FakeKioskDb(['default_max_uses' => '3', 'default_expire_minutes' => '120']);

        $settings = \Kiosk::voucherSettings($db, $this->kiosk());

        $this->assertSame(3, $settings['max_uses']);
        $this->assertSame(120, $settings['expire_minutes']);
        $this->assertSame(0, $settings['qos']['down']);
    }

    public function testPublicUrl(): void
    {
        $token = \Kiosk::newToken();

        $this->assertSame(
            'https://wlan.example.com/kiosk.php?k=' . $token,
            \Kiosk::publicUrl($token, 'https://wlan.example.com/')
        );
    }
}