<?php

declare(strict_types=1);

namespace KTXT\Unit\SystemStore;

use DateTimeImmutable;
use KTXC\Models\Tenant\TenantConfiguration;
use KTXC\Models\Tenant\TenantObject;
use KTXC\Resource\ProviderManager;
use KTXC\Service\TenantService;
use KTXC\SystemStore\SystemStoreManager;
use KTXF\Resource\BinaryResource;
use KTXF\Resource\Provider\ProviderInterface;
use KTXF\Resource\SystemIdentity;
use KTXF\SystemStore\BlobInfo;
use KTXF\SystemStore\InvalidKeyException;
use KTXF\SystemStore\Provider\ProviderBaseInterface;
use KTXF\SystemStore\Service\SystemStoreServiceInterface;
use KTXF\SystemStore\SystemStoreException;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\MockObject\MockObject;
use PHPUnit\Framework\TestCase;

final class SystemStoreManagerTest extends TestCase
{
    private TenantService&MockObject $tenants;
    private ProviderManager&MockObject $providers;
    private ProviderBaseInterface&MockObject $provider;
    private SystemStoreServiceInterface&MockObject $service;
    private SystemStoreManager $manager;

    protected function setUp(): void
    {
        $configuration = (new TenantConfiguration())->jsonDeserialize([
            'stores' => [
                'previews' => [
                    'provider' => 'storage-provider',
                    'service' => 'preview-storage',
                    'namespace' => 'tenant-previews',
                ],
            ],
        ]);
        $tenant = (new TenantObject())
            ->setIdentifier('tenant-a')
            ->setConfiguration($configuration);

        $this->tenants = $this->createMock(TenantService::class);
        $this->tenants->method('fetchById')->with('tenant-a')->willReturn($tenant);

        $this->service = $this->createMock(SystemStoreServiceInterface::class);
        $this->provider = $this->createMock(ProviderBaseInterface::class);
        $this->provider->method('serviceFetch')
            ->with('tenant-a', SystemIdentity::USER, 'preview-storage')
            ->willReturn($this->service);

        $this->providers = $this->createMock(ProviderManager::class);
        $this->providers->method('resolve')
            ->with(ProviderInterface::TYPE_SYSTEM_STORE, 'storage-provider')
            ->willReturn($this->provider);

        $this->manager = new SystemStoreManager($this->tenants, $this->providers);
    }

    #[Test]
    public function delegatesStatWithPhysicalNamespaceAndReturnsLogicalKey(): void
    {
        $this->service->expects(self::once())
            ->method('stat')
            ->with('tenant-previews/documents/report.pdf')
            ->willReturn($this->info('tenant-previews/documents/report.pdf'));

        $info = $this->manager->stat('tenant-a', 'previews', 'documents/report.pdf');

        self::assertSame('documents/report.pdf', $info?->key);
    }

    #[Test]
    public function delegatesReadDeleteAndWriteWithPhysicalNamespace(): void
    {
        $resource = $this->resource();

        $this->service->expects(self::once())
            ->method('read')
            ->with('tenant-previews/image.webp')
            ->willReturn($resource);
        $this->service->expects(self::once())
            ->method('delete')
            ->with('tenant-previews/image.webp', null)
            ->willReturn(true);
        $this->service->expects(self::once())
            ->method('write')
            ->with('tenant-previews/image.webp', $resource, ['variant' => 'popover'], null)
            ->willReturn($this->info('tenant-previews/image.webp'));

        self::assertSame($resource, $this->manager->read('tenant-a', 'previews', 'image.webp'));
        self::assertTrue($this->manager->delete('tenant-a', 'previews', 'image.webp'));
        self::assertSame(
            'image.webp',
            $this->manager->write(
                'tenant-a',
                'previews',
                'image.webp',
                $resource,
                ['variant' => 'popover'],
            )->key,
        );
    }

    #[Test]
    public function lazilyListsLogicalKeysWithinTheNamespace(): void
    {
        $this->service->expects(self::once())
            ->method('list')
            ->with('tenant-previews/documents/')
            ->willReturn((function (): iterable {
                yield $this->info('tenant-previews/documents/one.webp');
                yield $this->info('tenant-previews/documents/two.webp');
            })());

        $items = iterator_to_array($this->manager->list('tenant-a', 'previews', 'documents/'));

        self::assertSame(['documents/one.webp', 'documents/two.webp'], array_column($items, 'key'));
    }

    #[Test]
    public function rejectsTraversalKeys(): void
    {
        $this->service->expects(self::never())->method('read');
        $this->expectException(InvalidKeyException::class);

        $this->manager->read('tenant-a', 'previews', '../secret');
    }

    #[Test]
    public function rejectsProviderResultsOutsideTheConfiguredNamespace(): void
    {
        $this->service->expects(self::once())
            ->method('stat')
            ->willReturn($this->info('another-tenant/secret'));
        $this->expectException(SystemStoreException::class);

        $this->manager->stat('tenant-a', 'previews', 'secret');
    }

    #[Test]
    public function rejectsAnUnconfiguredLogicalStore(): void
    {
        $this->service->expects(self::never())->method('stat');
        $this->expectException(SystemStoreException::class);
        $this->expectExceptionMessage("System store 'icons' is not configured");

        $this->manager->stat('tenant-a', 'icons', 'logo.svg');
    }

    private function info(string $key): BlobInfo
    {
        return new BlobInfo(
            key: $key,
            mimeType: 'image/webp',
            size: 123,
            etag: 'revision-1',
            modifiedAt: new DateTimeImmutable('2026-08-28T12:00:00+00:00'),
        );
    }

    private function resource(): BinaryResource
    {
        return new BinaryResource(
            'image.webp',
            'image/webp',
            (function (): \Generator {
                yield 'content';
            })(),
        );
    }
}