<?php

declare(strict_types=1);

namespace Tests\Framework\LiveComponents;

use App\Framework\Core\ValueObjects\Byte;
use App\Framework\Filesystem\InMemoryStorage;
use App\Framework\LiveComponents\Services\ChunkAssembler;
use App\Framework\LiveComponents\Services\ChunkedUploadManager;
use App\Framework\LiveComponents\Services\IntegrityValidator;
use App\Framework\LiveComponents\Services\UploadProgressTracker;
use App\Framework\LiveComponents\Services\UploadSessionIdGenerator;
use App\Framework\LiveComponents\Services\UploadSessionStore;
use App\Framework\LiveComponents\ValueObjects\ChunkHash;
use App\Framework\LiveComponents\ValueObjects\UploadSessionId;

beforeEach(function () {
    // Setup dependencies
    $this->sessionIdGenerator = new UploadSessionIdGenerator();
    $this->sessionStore = new UploadSessionStore();
    $this->integrityValidator = new IntegrityValidator();
    $this->chunkAssembler = new ChunkAssembler();
    $this->fileStorage = new InMemoryStorage();

    // Mock progress tracker (no SSE in tests)
    $this->progressTracker = new class {
        public function broadcastInitialized($session, $userId): void {}
        public function broadcastChunkUploaded($session, $userId): void {}
        public function broadcastCompleted($session, $userId): void {}
        public function broadcastAborted($sessionId, $userId, $reason): void {}
    };

    $this->uploadManager = new ChunkedUploadManager(
        $this->sessionIdGenerator,
        $this->sessionStore,
        $this->integrityValidator,
        $this->chunkAssembler,
        $this->fileStorage,
        $this->progressTracker,
        '/tmp/test-uploads'
    );
});

test('initializes upload session successfully', function () {
    $session = $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromKilobytes(1),
        chunkSize: Byte::fromBytes(512)
    );

    expect($session->sessionId)->toBeInstanceOf(UploadSessionId::class);
    expect($session->componentId)->toBe('test-uploader');
    expect($session->fileName)->toBe('test-file.txt');
    expect($session->totalSize->toBytes())->toBe(1024);
    expect($session->totalChunks)->toBe(2); // 1024 bytes / 512 bytes = 2 chunks
    expect($session->isComplete())->toBeFalse();
});

test('rejects invalid file size', function () {
    expect(fn() => $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(0),
        chunkSize: Byte::fromBytes(512)
    ))->toThrow(\InvalidArgumentException::class, 'Total size must be greater than zero');
});

test('rejects invalid chunk size', function () {
    expect(fn() => $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromKilobytes(1),
        chunkSize: Byte::fromBytes(0)
    ))->toThrow(\InvalidArgumentException::class, 'Chunk size must be greater than zero');
});

test('uploads chunk successfully', function () {
    // Initialize session
    $session = $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(1024),
        chunkSize: Byte::fromBytes(512)
    );

    // Prepare chunk data
    $chunkData = str_repeat('A', 512);
    $chunkHash = ChunkHash::fromData($chunkData);

    // Upload first chunk
    $updatedSession = $this->uploadManager->uploadChunk(
        sessionId: $session->sessionId,
        chunkIndex: 0,
        chunkData: $chunkData,
        providedHash: $chunkHash
    );

    expect($updatedSession->getUploadedChunks())->toHaveCount(1);
    expect($updatedSession->getProgress())->toBe(50.0); // 1 of 2 chunks
    expect($updatedSession->isComplete())->toBeFalse();
});

test('rejects chunk with invalid hash', function () {
    // Initialize session
    $session = $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(1024),
        chunkSize: Byte::fromBytes(512)
    );

    // Prepare chunk data with wrong hash
    $chunkData = str_repeat('A', 512);
    $wrongHash = ChunkHash::fromData('different data');

    expect(fn() => $this->uploadManager->uploadChunk(
        sessionId: $session->sessionId,
        chunkIndex: 0,
        chunkData: $chunkData,
        providedHash: $wrongHash
    ))->toThrow(\InvalidArgumentException::class, 'hash mismatch');
});

test('rejects invalid chunk index', function () {
    // Initialize session
    $session = $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(1024),
        chunkSize: Byte::fromBytes(512)
    );

    $chunkData = str_repeat('A', 512);
    $chunkHash = ChunkHash::fromData($chunkData);

    // Try to upload chunk with invalid index
    expect(fn() => $this->uploadManager->uploadChunk(
        sessionId: $session->sessionId,
        chunkIndex: 99, // Out of bounds
        chunkData: $chunkData,
        providedHash: $chunkHash
    ))->toThrow(\InvalidArgumentException::class, 'Invalid chunk index');
});

test('completes upload after all chunks uploaded', function () {
    // Initialize session
    $session = $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(1024),
        chunkSize: Byte::fromBytes(512)
    );

    // Upload all chunks
    $chunk1Data = str_repeat('A', 512);
    $chunk1Hash = ChunkHash::fromData($chunk1Data);

    $this->uploadManager->uploadChunk(
        sessionId: $session->sessionId,
        chunkIndex: 0,
        chunkData: $chunk1Data,
        providedHash: $chunk1Hash
    );

    $chunk2Data = str_repeat('B', 512);
    $chunk2Hash = ChunkHash::fromData($chunk2Data);

    $updatedSession = $this->uploadManager->uploadChunk(
        sessionId: $session->sessionId,
        chunkIndex: 1,
        chunkData: $chunk2Data,
        providedHash: $chunk2Hash
    );

    expect($updatedSession->isComplete())->toBeTrue();
    expect($updatedSession->getProgress())->toBe(100.0);

    // Complete upload
    $targetPath = '/tmp/final-file.txt';
    $completedSession = $this->uploadManager->completeUpload(
        sessionId: $session->sessionId,
        targetPath: $targetPath
    );

    expect($completedSession->completedAt)->not->toBeNull();
    expect($this->fileStorage->exists($targetPath))->toBeTrue();

    // Verify assembled file content
    $assembledContent = $this->fileStorage->get($targetPath);
    expect($assembledContent)->toBe($chunk1Data . $chunk2Data);
});

test('rejects completion when chunks are missing', function () {
    // Initialize session
    $session = $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(1024),
        chunkSize: Byte::fromBytes(512)
    );

    // Upload only first chunk (missing second chunk)
    $chunkData = str_repeat('A', 512);
    $chunkHash = ChunkHash::fromData($chunkData);

    $this->uploadManager->uploadChunk(
        sessionId: $session->sessionId,
        chunkIndex: 0,
        chunkData: $chunkData,
        providedHash: $chunkHash
    );

    // Try to complete with missing chunks
    expect(fn() => $this->uploadManager->completeUpload(
        sessionId: $session->sessionId,
        targetPath: '/tmp/final-file.txt'
    ))->toThrow(\InvalidArgumentException::class, 'Upload incomplete');
});

test('aborts upload and cleans up', function () {
    // Initialize session
    $session = $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(1024),
        chunkSize: Byte::fromBytes(512)
    );

    // Upload one chunk
    $chunkData = str_repeat('A', 512);
    $chunkHash = ChunkHash::fromData($chunkData);

    $this->uploadManager->uploadChunk(
        sessionId: $session->sessionId,
        chunkIndex: 0,
        chunkData: $chunkData,
        providedHash: $chunkHash
    );

    // Abort upload
    $this->uploadManager->abortUpload(
        sessionId: $session->sessionId,
        reason: 'User cancelled'
    );

    // Verify session is deleted
    expect($this->uploadManager->getStatus($session->sessionId))->toBeNull();
});

test('tracks progress correctly', function () {
    // Initialize session with 4 chunks
    $session = $this->uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(2048),
        chunkSize: Byte::fromBytes(512)
    );

    expect($session->getProgress())->toBe(0.0);

    // Upload chunks one by one
    for ($i = 0; $i < 4; $i++) {
        $chunkData = str_repeat(chr(65 + $i), 512);
        $chunkHash = ChunkHash::fromData($chunkData);

        $session = $this->uploadManager->uploadChunk(
            sessionId: $session->sessionId,
            chunkIndex: $i,
            chunkData: $chunkData,
            providedHash: $chunkHash
        );

        $expectedProgress = (($i + 1) / 4) * 100;
        expect($session->getProgress())->toBe($expectedProgress);
    }

    expect($session->isComplete())->toBeTrue();
});

test('handles session not found', function () {
    $nonExistentSessionId = UploadSessionId::generate();
    $chunkData = str_repeat('A', 512);
    $chunkHash = ChunkHash::fromData($chunkData);

    expect(fn() => $this->uploadManager->uploadChunk(
        sessionId: $nonExistentSessionId,
        chunkIndex: 0,
        chunkData: $chunkData,
        providedHash: $chunkHash
    ))->toThrow(\InvalidArgumentException::class, 'Session not found');
});

test('broadcasts progress with userId', function () {
    $broadcastCalled = false;

    // Replace progress tracker with capturing mock
    $this->progressTracker = new class($broadcastCalled) {
        public function __construct(private &$called) {}

        public function broadcastInitialized($session, $userId): void {
            if ($userId !== null) {
                $this->called = true;
            }
        }
        public function broadcastChunkUploaded($session, $userId): void {}
        public function broadcastCompleted($session, $userId): void {}
        public function broadcastAborted($sessionId, $userId, $reason): void {}
    };

    $uploadManager = new ChunkedUploadManager(
        $this->sessionIdGenerator,
        $this->sessionStore,
        $this->integrityValidator,
        $this->chunkAssembler,
        $this->fileStorage,
        $this->progressTracker,
        '/tmp/test-uploads'
    );

    // Initialize with userId
    $uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(1024),
        chunkSize: Byte::fromBytes(512),
        userId: 'user-123'
    );

    expect($broadcastCalled)->toBeTrue();
});

test('skips SSE broadcast when userId is null', function () {
    $broadcastCalled = false;

    // Replace progress tracker with capturing mock
    $this->progressTracker = new class($broadcastCalled) {
        public function __construct(private &$called) {}

        public function broadcastInitialized($session, $userId): void {
            $this->called = true;
        }
        public function broadcastChunkUploaded($session, $userId): void {}
        public function broadcastCompleted($session, $userId): void {}
        public function broadcastAborted($sessionId, $userId, $reason): void {}
    };

    $uploadManager = new ChunkedUploadManager(
        $this->sessionIdGenerator,
        $this->sessionStore,
        $this->integrityValidator,
        $this->chunkAssembler,
        $this->fileStorage,
        $this->progressTracker,
        '/tmp/test-uploads'
    );

    // Initialize without userId
    $uploadManager->initializeUpload(
        componentId: 'test-uploader',
        fileName: 'test-file.txt',
        totalSize: Byte::fromBytes(1024),
        chunkSize: Byte::fromBytes(512),
        userId: null // No SSE
    );

    expect($broadcastCalled)->toBeFalse();
});