<?php

declare(strict_types=1);

namespace KTXT\Integration\Stores;

use KTXC\Context\TenantContextInterface;
use KTXC\Db\DataStore;
use KTXC\Models\Firewall\FirewallRuleObject;
use KTXC\Service\FirewallService;
use KTXC\Stores\FirewallStore;
use KTXF\Event\EventDispatcherInterface;
use PHPUnit\Framework\Attributes\AllowMockObjectsWithoutExpectations;
use PHPUnit\Framework\Attributes\TestDox;
use PHPUnit\Framework\TestCase;

#[AllowMockObjectsWithoutExpectations]
class FirewallStoreTest extends TestCase
{
    private DataStore $dataStore;
    private FirewallStore $store;
    private bool $databaseAvailable = false;

    protected function setUp(): void
    {
        $system = require dirname(__DIR__, 4).'/config/system.php';
        $database = $system['database'];
        $database['database'] = sprintf('ktrix_firewall_test_%d', getmypid());

        $this->dataStore = new DataStore($database);
        try {
            $this->dataStore->getDatabase()->drop();
            $this->databaseAvailable = true;
        } catch (\MongoDB\Driver\Exception\Exception $error) {
            self::markTestSkipped('MongoDB is unavailable: '.$error->getMessage());
        }
        $this->store = new FirewallStore($this->dataStore);
    }

    protected function tearDown(): void
    {
        if ($this->databaseAvailable) {
            $this->dataStore->getDatabase()->drop();
        }
    }

    #[TestDox('Applicable rules contain system rules and only the requested tenant rules')]
    public function testApplicableScopes(): void
    {
        $tenantA = $this->rule('tenant-a', FirewallRuleObject::SCOPE_TENANT, 'tenant-a');
        $tenantB = $this->rule('tenant-b', FirewallRuleObject::SCOPE_TENANT, 'tenant-b');
        $system = $this->rule('system', FirewallRuleObject::SCOPE_SYSTEM);
        $expiredSystem = $this->rule('expired-system', FirewallRuleObject::SCOPE_SYSTEM)
            ->setExpiresAt(new \DateTimeImmutable('-1 minute'));
        $disabledSystem = $this->rule('disabled-system', FirewallRuleObject::SCOPE_SYSTEM)
            ->setEnabled(false);

        foreach ([$tenantA, $tenantB, $system, $expiredSystem, $disabledSystem] as $rule) {
            $this->store->depositRule($rule);
        }

        $rules = $this->store->listApplicableRules('tenant-a');
        $reasons = array_map(static fn(FirewallRuleObject $rule): ?string => $rule->getReason(), $rules);
        sort($reasons);

        self::assertSame(['system', 'tenant-a'], $reasons);
    }

    #[TestDox('Tenant rule listings cannot expose system or other tenant rules')]
    public function testTenantListingIsolation(): void
    {
        $this->store->depositRule($this->rule('tenant-a', FirewallRuleObject::SCOPE_TENANT, 'tenant-a'));
        $this->store->depositRule($this->rule('tenant-b', FirewallRuleObject::SCOPE_TENANT, 'tenant-b'));
        $this->store->depositRule($this->rule('system', FirewallRuleObject::SCOPE_SYSTEM));

        $rules = $this->store->listRules('tenant-a');

        self::assertCount(1, $rules);
        self::assertSame('tenant-a', $rules[0]->getReason());
        self::assertSame(FirewallRuleObject::SCOPE_TENANT, $rules[0]->getScope());
    }

    #[TestDox('Expired exact IP rules do not suppress a replacement block')]
    public function testExpiredBlockReplacement(): void
    {
        $expired = $this->rule('expired', FirewallRuleObject::SCOPE_TENANT, 'tenant-a')
            ->setExpiresAt(new \DateTimeImmutable('-1 minute'));
        $this->store->depositRule($expired);

        self::assertNull($this->store->findExactIpRule(
            'tenant-a',
            '203.0.113.10',
            FirewallRuleObject::ACTION_BLOCK
        ));

        $tenantContext = $this->createMock(TenantContextInterface::class);
        $tenantContext->method('identifier')->willReturn('tenant-a');
        $tenantContext->method('configuration')->willReturn(null);
        $events = $this->createMock(EventDispatcherInterface::class);
        $service = new FirewallService($this->store, $tenantContext, $events);

        $replacement = $service->blockIp('203.0.113.10', durationSeconds: 300);

        self::assertFalse($replacement->isExpired());
        self::assertNotSame($expired->getId(), $replacement->getId());
        self::assertSame(
            $replacement->getId(),
            $this->store->findExactIpRule(
                'tenant-a',
                '203.0.113.10',
                FirewallRuleObject::ACTION_BLOCK
            )?->getId()
        );
        self::assertCount(2, $this->store->listRules('tenant-a', false));
    }

    #[TestDox('Exact IP lookups respect tenant and system scope')]
    public function testExactLookupScope(): void
    {
        $tenant = $this->rule('tenant', FirewallRuleObject::SCOPE_TENANT, 'tenant-a');
        $system = $this->rule('system', FirewallRuleObject::SCOPE_SYSTEM);
        $this->store->depositRule($tenant);
        $this->store->depositRule($system);

        self::assertSame(
            $tenant->getId(),
            $this->store->findExactIpRule(
                'tenant-a',
                '203.0.113.10',
                FirewallRuleObject::ACTION_BLOCK
            )?->getId()
        );
        self::assertSame(
            $system->getId(),
            $this->store->findExactIpRule(
                null,
                '203.0.113.10',
                FirewallRuleObject::ACTION_BLOCK,
                FirewallRuleObject::SCOPE_SYSTEM
            )?->getId()
        );
        self::assertNull($this->store->findExactIpRule(
            'tenant-b',
            '203.0.113.10',
            FirewallRuleObject::ACTION_BLOCK
        ));
    }

    private function rule(
        string $reason,
        string $scope,
        ?string $tenantId = null
    ): FirewallRuleObject {
        return (new FirewallRuleObject())
            ->setScope($scope)
            ->setTenantId($tenantId)
            ->setType(FirewallRuleObject::TYPE_IP)
            ->setAction(FirewallRuleObject::ACTION_BLOCK)
            ->setValue('203.0.113.10')
            ->setReason($reason)
            ->setCreatedAt(new \DateTimeImmutable())
            ->setEnabled(true);
    }
}