using Minio;
using RobotNet10.StorageManager;
using Xunit;

namespace RobotNet10.StorageManager.Test;

public class StorageManagerTests
{
    private readonly string _testFolder = Path.Combine(Path.GetTempPath(), "StorageManagerTests");

    public StorageManagerTests()
    {
        // Clean up test folder before each test
        if (Directory.Exists(_testFolder))
        {
            Directory.Delete(_testFolder, true);
        }
        Directory.CreateDirectory(_testFolder);
    }

    [Fact]
    public void Constructor_WithNullConfig_ThrowsArgumentNullException()
    {
        // Act & Assert
        Assert.Throws<ArgumentNullException>(() => new StorageManager(null!));
    }

    [Fact]
    public void Constructor_WithMinioButNoConfig_ThrowsArgumentException()
    {
        // Arrange
        var config = new StorageConfig
        {
            UsingLocal = false,
            MinioConfig = null
        };

        // Act & Assert
        var ex = Assert.Throws<ArgumentException>(() => new StorageManager(config));
        Assert.Contains("MinioConfig is required", ex.Message);
    }

    [Fact]
    public void Constructor_WithMinioButEmptyEndpoint_ThrowsArgumentException()
    {
        // Arrange
        var config = new StorageConfig
        {
            UsingLocal = false,
            MinioConfig = new MinioConfig { Endpoint = string.Empty },
            Bucket = "test-bucket"
        };

        // Act & Assert
        var ex = Assert.Throws<ArgumentException>(() => new StorageManager(config));
        Assert.Contains("Endpoint", ex.Message);
    }

    [Fact]
    public void Constructor_WithMinioButEmptyBucket_ThrowsArgumentException()
    {
        // Arrange
        var config = new StorageConfig
        {
            UsingLocal = false,
            MinioConfig = new MinioConfig { Endpoint = "localhost:9000" },
            Bucket = string.Empty
        };

        // Act & Assert
        var ex = Assert.Throws<ArgumentException>(() => new StorageManager(config));
        Assert.Contains("Bucket", ex.Message);
    }

    [Fact]
    public async Task UploadAsync_WithNullPath_ThrowsArgumentException()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var data = new MemoryStream(new byte[] { 1, 2, 3 });

        // Act & Assert
        await Assert.ThrowsAsync<ArgumentException>(() => 
            manager.UploadAsync(null!, "test", data, 3, "image/png", CancellationToken.None));
    }

    [Fact]
    public async Task UploadAsync_WithPathContainingDotDot_ThrowsArgumentException()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var data = new MemoryStream(new byte[] { 1, 2, 3 });

        // Act & Assert
        await Assert.ThrowsAsync<ArgumentException>(() => 
            manager.UploadAsync("../test", "test", data, 3, "image/png", CancellationToken.None));
    }

    [Fact]
    public async Task UploadAsync_WithNullData_ThrowsArgumentNullException()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);

        // Act & Assert
        await Assert.ThrowsAsync<ArgumentNullException>(() => 
            manager.UploadAsync("test", "test", null!, 3, "image/png", CancellationToken.None));
    }

    [Fact]
    public async Task UploadAsync_WithNegativeSize_ThrowsArgumentException()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var data = new MemoryStream(new byte[] { 1, 2, 3 });

        // Act & Assert
        await Assert.ThrowsAsync<ArgumentException>(() => 
            manager.UploadAsync("test", "test", data, -1, "image/png", CancellationToken.None));
    }

    [Fact]
    public async Task UploadAsync_Local_WithPngContentType_CreatesPngFile()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var data = new MemoryStream(new byte[] { 1, 2, 3 });
        var path = "test";
        var objectName = "image";

        // Act
        await manager.UploadAsync(path, objectName, data, 3, "image/png", CancellationToken.None);

        // Assert
        var expectedPath = Path.Combine(_testFolder, path, $"{objectName}.png");
        Assert.True(File.Exists(expectedPath));
    }

    [Fact]
    public async Task UploadAsync_Local_WithJpegContentType_CreatesJpgFile()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var data = new MemoryStream(new byte[] { 1, 2, 3 });
        var path = "test";
        var objectName = "image";

        // Act
        await manager.UploadAsync(path, objectName, data, 3, "image/jpeg", CancellationToken.None);

        // Assert
        var expectedPath = Path.Combine(_testFolder, path, $"{objectName}.jpg");
        Assert.True(File.Exists(expectedPath));
    }

    [Fact]
    public async Task UploadAsync_Local_WithPdfContentType_CreatesPdfFile()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var data = new MemoryStream(new byte[] { 1, 2, 3 });
        var path = "test";
        var objectName = "document";

        // Act
        await manager.UploadAsync(path, objectName, data, 3, "application/pdf", CancellationToken.None);

        // Assert
        var expectedPath = Path.Combine(_testFolder, path, $"{objectName}.pdf");
        Assert.True(File.Exists(expectedPath));
    }

    [Fact]
    public async Task UploadAsync_Local_CreatesBackupFile()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var data1 = new MemoryStream(new byte[] { 1, 2, 3 });
        var data2 = new MemoryStream(new byte[] { 4, 5, 6 });
        var path = "test";
        var objectName = "image";

        // Act - Upload first time
        await manager.UploadAsync(path, objectName, data1, 3, "image/png", CancellationToken.None);
        var filePath = Path.Combine(_testFolder, path, $"{objectName}.png");
        Assert.True(File.Exists(filePath));

        // Upload second time - should create backup
        await manager.UploadAsync(path, objectName, data2, 3, "image/png", CancellationToken.None);

        // Assert
        Assert.True(File.Exists(filePath));
        var backupPath = $"{filePath}.bk";
        Assert.True(File.Exists(backupPath));
    }

    [Fact]
    public async Task GetUrlAsync_Local_WithExistingFile_ReturnsPath()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var path = "test";
        var objectName = "image";
        var filePath = Path.Combine(_testFolder, path, $"{objectName}.png");
        Directory.CreateDirectory(Path.GetDirectoryName(filePath)!);
        File.WriteAllBytes(filePath, new byte[] { 1, 2, 3 });

        // Act
        var url = await manager.GetUrlAsync(path, objectName, CancellationToken.None);

        // Assert
        Assert.Equal(filePath, url);
    }

    [Fact]
    public async Task GetUrlAsync_Local_WithNonExistingFile_ReturnsEmpty()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);

        // Act
        var url = await manager.GetUrlAsync("test", "nonexistent", CancellationToken.None);

        // Assert
        Assert.Equal(string.Empty, url);
    }

    [Fact]
    public async Task DeleteAsync_Local_DeletesFile()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var path = "test";
        var objectName = "image";
        var filePath = Path.Combine(_testFolder, path, $"{objectName}.png");
        Directory.CreateDirectory(Path.GetDirectoryName(filePath)!);
        File.WriteAllBytes(filePath, new byte[] { 1, 2, 3 });

        // Act
        await manager.DeleteAsync(path, objectName, CancellationToken.None);

        // Assert
        Assert.False(File.Exists(filePath));
    }

    [Fact]
    public async Task ExistsAsync_Local_WithExistingFile_ReturnsTrue()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var path = "test";
        var objectName = "image";
        var filePath = Path.Combine(_testFolder, path, $"{objectName}.png");
        Directory.CreateDirectory(Path.GetDirectoryName(filePath)!);
        File.WriteAllBytes(filePath, new byte[] { 1, 2, 3 });

        // Act
        var exists = await manager.ExistsAsync(path, objectName, CancellationToken.None);

        // Assert
        Assert.True(exists);
    }

    [Fact]
    public async Task ExistsAsync_Local_WithNonExistingFile_ReturnsFalse()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);

        // Act
        var exists = await manager.ExistsAsync("test", "nonexistent", CancellationToken.None);

        // Assert
        Assert.False(exists);
    }

    [Fact]
    public async Task ListAsync_Local_NonRecursive_ReturnsFilesInPath()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var path = "test";
        var folderPath = Path.Combine(_testFolder, path);
        Directory.CreateDirectory(folderPath);
        File.WriteAllBytes(Path.Combine(folderPath, "file1.png"), new byte[] { 1 });
        File.WriteAllBytes(Path.Combine(folderPath, "file2.jpg"), new byte[] { 2 });

        // Act
        var files = await manager.ListAsync(path, false, CancellationToken.None);

        // Assert
        Assert.Equal(2, files.Count);
        Assert.Contains("file1.png", files);
        Assert.Contains("file2.jpg", files);
    }

    [Fact]
    public async Task ListAsync_Local_Recursive_ReturnsAllFiles()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var path = "test";
        var folderPath = Path.Combine(_testFolder, path);
        Directory.CreateDirectory(folderPath);
        var subFolder = Path.Combine(folderPath, "sub");
        Directory.CreateDirectory(subFolder);
        File.WriteAllBytes(Path.Combine(folderPath, "file1.png"), new byte[] { 1 });
        File.WriteAllBytes(Path.Combine(subFolder, "file2.jpg"), new byte[] { 2 });

        // Act
        var files = await manager.ListAsync(path, true, CancellationToken.None);

        // Assert
        Assert.Equal(2, files.Count);
        Assert.Contains("file1.png", files);
        Assert.Contains("sub/file2.jpg", files);
    }

    [Fact]
    public async Task CopyAsync_Local_CopiesFile()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var sourcePath = "source";
        var destPath = "dest";
        var objectName = "file";
        var sourceFile = Path.Combine(_testFolder, sourcePath, $"{objectName}.png");
        Directory.CreateDirectory(Path.GetDirectoryName(sourceFile)!);
        File.WriteAllBytes(sourceFile, new byte[] { 1, 2, 3 });

        // Act
        await manager.CopyAsync(sourcePath, destPath, objectName, CancellationToken.None);

        // Assert
        var destFile = Path.Combine(_testFolder, destPath, $"{objectName}.png");
        Assert.True(File.Exists(destFile));
        Assert.True(File.Exists(sourceFile)); // Source should still exist
    }

    [Fact]
    public async Task GetMetadataAsync_Local_ReturnsMetadata()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);
        var path = "test";
        var objectName = "image";
        var filePath = Path.Combine(_testFolder, path, $"{objectName}.png");
        Directory.CreateDirectory(Path.GetDirectoryName(filePath)!);
        var fileData = new byte[] { 1, 2, 3, 4, 5 };
        File.WriteAllBytes(filePath, fileData);

        // Act
        var metadata = await manager.GetMetadataAsync(path, objectName, CancellationToken.None);

        // Assert
        Assert.Equal(path, metadata.Path);
        Assert.Equal(objectName, metadata.ObjectName);
        Assert.Equal(fileData.Length, metadata.Size);
        Assert.Equal("image/png", metadata.ContentType);
        Assert.NotNull(metadata.LastModified);
    }

    [Fact]
    public async Task GetMetadataAsync_Local_WithNonExistingFile_ThrowsFileNotFoundException()
    {
        // Arrange
        var config = new StorageConfig { UsingLocal = true, LocalFolder = _testFolder };
        var manager = new StorageManager(config);

        // Act & Assert
        await Assert.ThrowsAsync<FileNotFoundException>(() => 
            manager.GetMetadataAsync("test", "nonexistent", CancellationToken.None));
    }

    [Fact]
    public void Dispose_DisposesMinioClient()
    {
        // Arrange
        var config = new StorageConfig
        {
            UsingLocal = false,
            MinioConfig = new MinioConfig
            {
                Endpoint = "localhost:9000",
                User = "minioadmin",
                Password = "minioadmin"
            },
            Bucket = "test-bucket"
        };
        var manager = new StorageManager(config);

        // Act
        manager.Dispose();

        // Assert - Should not throw
        Assert.True(true);
    }
}