<?php

declare(strict_types=1);

use App\Framework\Core\ValueObjects\FileSize;
use App\Framework\Filesystem\FileValidator;
use App\Framework\Filesystem\Exceptions\FileValidationException;

describe('FileValidator', function () {
    // Factory Methods Tests
    it('creates default validator with safe defaults', function () {
        $validator = FileValidator::createDefault();

        expect($validator->getAllowedExtensions())->toBeNull();
        expect($validator->getBlockedExtensions())->toBe(['exe', 'bat', 'sh', 'cmd', 'com']);
        expect($validator->getMaxFileSize())->toBeInstanceOf(FileSize::class);
        expect($validator->getMaxFileSize()->toBytes())->toBe(100 * 1024 * 1024); // 100MB
    });

    it('creates strict validator with allowed extensions only', function () {
        $validator = FileValidator::createStrict(['txt', 'pdf']);

        expect($validator->getAllowedExtensions())->toBe(['txt', 'pdf']);
        expect($validator->getBlockedExtensions())->toBeNull();
        expect($validator->getMaxFileSize()->toBytes())->toBe(50 * 1024 * 1024); // 50MB
    });

    it('creates upload validator with secure defaults', function () {
        $validator = FileValidator::forUploads();

        expect($validator->getAllowedExtensions())->toBe(['jpg', 'jpeg', 'png', 'gif', 'pdf', 'txt', 'csv', 'json']);
        expect($validator->getBlockedExtensions())->toBe(['exe', 'bat', 'sh', 'cmd', 'com', 'php', 'phtml']);
        expect($validator->getMaxFileSize()->toBytes())->toBe(10 * 1024 * 1024); // 10MB
    });

    it('creates image validator with image extensions only', function () {
        $validator = FileValidator::forImages();

        expect($validator->getAllowedExtensions())->toBe(['jpg', 'jpeg', 'png', 'gif', 'webp', 'svg']);
        expect($validator->getBlockedExtensions())->toBeNull();
        expect($validator->getMaxFileSize()->toBytes())->toBe(5 * 1024 * 1024); // 5MB
    });

    it('allows custom max size for uploads', function () {
        $customSize = FileSize::fromMegabytes(20);
        $validator = FileValidator::forUploads($customSize);

        expect($validator->getMaxFileSize()->toBytes())->toBe(20 * 1024 * 1024);
    });

    // Path Validation Tests
    it('validates normal file paths', function () {
        $validator = FileValidator::createDefault();

        $validator->validatePath('/var/www/html/test.txt');
        $validator->validatePath('relative/path/file.json');

        expect(true)->toBeTrue(); // No exception thrown
    });

    it('throws exception for empty path', function () {
        $validator = FileValidator::createDefault();

        try {
            $validator->validatePath('');
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('File path cannot be empty');
        }
    });

    it('throws exception for path with null bytes', function () {
        $validator = FileValidator::createDefault();

        try {
            $validator->validatePath("/path/to/file\0.txt");
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('null bytes');
        }
    });

    it('detects path traversal with ../', function () {
        $validator = FileValidator::createDefault();

        try {
            $validator->validatePath('../../../etc/passwd');
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('Path traversal attempt');
        }
    });

    it('detects path traversal with backslash notation', function () {
        $validator = FileValidator::createDefault();

        try {
            $validator->validatePath('..\\..\\windows\\system32');
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('Path traversal attempt');
        }
    });

    it('detects URL-encoded path traversal', function () {
        $validator = FileValidator::createDefault();

        try {
            $validator->validatePath('/path/%2e%2e/etc/passwd');
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('Path traversal attempt');
        }
    });

    // Extension Validation Tests
    it('validates allowed extensions', function () {
        $validator = FileValidator::createStrict(['txt', 'pdf']);

        $validator->validateExtension('/path/to/file.txt');
        $validator->validateExtension('/path/to/document.pdf');

        expect(true)->toBeTrue(); // No exception thrown
    });

    it('throws exception for disallowed extension', function () {
        $validator = FileValidator::createStrict(['txt', 'pdf']);

        try {
            $validator->validateExtension('/path/to/file.exe');
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('not allowed');
        }
    });

    it('throws exception for blocked extension', function () {
        $validator = FileValidator::createDefault();

        try {
            $validator->validateExtension('/path/to/malware.exe');
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('is blocked');
        }
    });

    it('allows files without extension when no whitelist defined', function () {
        $validator = FileValidator::createDefault();

        $validator->validateExtension('/path/to/Makefile');

        expect(true)->toBeTrue(); // No exception thrown
    });

    it('throws exception for files without extension when whitelist defined', function () {
        $validator = FileValidator::createStrict(['txt', 'pdf']);

        try {
            $validator->validateExtension('/path/to/Makefile');
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('no extension');
        }
    });

    it('handles case-insensitive extension validation', function () {
        $validator = FileValidator::createStrict(['txt', 'pdf']);

        $validator->validateExtension('/path/to/file.TXT');
        $validator->validateExtension('/path/to/document.PDF');

        expect(true)->toBeTrue(); // No exception thrown
    });

    // FileSize Validation Tests
    it('validates file size within limit', function () {
        $validator = FileValidator::forUploads(FileSize::fromMegabytes(10));

        $validator->validateFileSize(FileSize::fromMegabytes(5));
        $validator->validateFileSize(FileSize::fromMegabytes(9));

        expect(true)->toBeTrue(); // No exception thrown
    });

    it('throws exception when file size exceeds limit', function () {
        $validator = FileValidator::forUploads(FileSize::fromMegabytes(10));

        try {
            $validator->validateFileSize(FileSize::fromMegabytes(15));
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('exceeds maximum allowed size');
        }
    });

    it('allows any file size when no limit defined', function () {
        $validator = new FileValidator(
            allowedExtensions: null,
            blockedExtensions: null,
            maxFileSize: null,
            baseDirectory: null
        );

        $validator->validateFileSize(FileSize::fromGigabytes(10));

        expect(true)->toBeTrue(); // No exception thrown
    });

    // Extension Check Helper Tests
    it('checks if extension is allowed', function () {
        $validator = FileValidator::createStrict(['txt', 'pdf']);

        expect($validator->isExtensionAllowed('txt'))->toBeTrue();
        expect($validator->isExtensionAllowed('.pdf'))->toBeTrue(); // With dot
        expect($validator->isExtensionAllowed('TXT'))->toBeTrue(); // Case insensitive
        expect($validator->isExtensionAllowed('exe'))->toBeFalse();
    });

    it('checks blocked extensions correctly', function () {
        $validator = FileValidator::createDefault();

        expect($validator->isExtensionAllowed('exe'))->toBeFalse();
        expect($validator->isExtensionAllowed('txt'))->toBeTrue();
        expect($validator->isExtensionAllowed('pdf'))->toBeTrue();
    });

    it('allows all extensions when no restrictions', function () {
        $validator = new FileValidator();

        expect($validator->isExtensionAllowed('exe'))->toBeTrue();
        expect($validator->isExtensionAllowed('anything'))->toBeTrue();
    });

    // Composite Validation Tests
    it('validates upload with all checks', function () {
        $validator = FileValidator::forUploads();

        $validator->validateUpload('/path/to/image.jpg', FileSize::fromMegabytes(2));

        expect(true)->toBeTrue(); // No exception thrown
    });

    it('composite upload validation catches path traversal', function () {
        $validator = FileValidator::forUploads();

        try {
            $validator->validateUpload('../../../etc/passwd.jpg', FileSize::fromMegabytes(1));
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('Path traversal');
        }
    });

    it('composite upload validation catches disallowed extension', function () {
        $validator = FileValidator::forUploads();

        try {
            $validator->validateUpload('/path/to/script.php', FileSize::fromMegabytes(1));
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('is not allowed');
        }
    });

    it('composite upload validation catches oversized file', function () {
        $validator = FileValidator::forUploads();

        try {
            $validator->validateUpload('/path/to/image.jpg', FileSize::fromMegabytes(50));
            expect(true)->toBeFalse('Should have thrown exception');
        } catch (FileValidationException $e) {
            expect($e->getMessage())->toContain('exceeds maximum');
        }
    });

    // Getter Tests
    it('provides access to configuration', function () {
        $allowedExtensions = ['txt', 'pdf'];
        $blockedExtensions = ['exe', 'bat'];
        $maxSize = FileSize::fromMegabytes(20);

        $validator = new FileValidator(
            allowedExtensions: $allowedExtensions,
            blockedExtensions: $blockedExtensions,
            maxFileSize: $maxSize
        );

        expect($validator->getAllowedExtensions())->toBe($allowedExtensions);
        expect($validator->getBlockedExtensions())->toBe($blockedExtensions);
        expect($validator->getMaxFileSize())->toBe($maxSize);
    });
});