import Foundation
import DriverKit
import NetworkDriverKit

class ObjectStorageTestDriver: IONetworkController {
    
    // Object Storage DriverKit测试驱动
    // 使用Networking Entitlement验证Object Storage operations
    // 支持S3/MinIO/Ceph
    
    private var s3Client: S3Client?
    private var minioClient: MinIOClient?
    private var cephClient: CephClient?
    
    override init() {
        super.init()
        print("ObjectStorageTestDriver initializing...")
    }
    
    override func Start() -> IOReturn {
        print("ObjectStorageTestDriver Start() called")
        
        let result = super.Start()
        
        if result == kIOReturnSuccess {
            print("ObjectStorageTestDriver started successfully")
            
            // 初始化Object Storage客户端
            initializeClients()
            
            // 测试Object Storage operations
            testObjectStorageOperations()
        } else {
            print("ObjectStorageTestDriver start failed: \(result)")
        }
        
        return result
    }
    
    func initializeClients() {
        print("Initializing Object Storage clients...")
        
        // 初始化S3客户端
        initializeS3Client()
        
        // 初始化MinIO客户端
        initializeMinIOClient()
        
        // 初始化Ceph客户端
        initializeCephClient()
    }
    
    func initializeS3Client() {
        print("  - Initializing S3 client...")
        
        // S3 configuration
        let s3Config = S3Config(
            endpoint: "https://s3.amazonaws.com",
            region: "us-east-1",
            accessKey: "test_access_key",
            secretKey: "test_secret_key"
        )
        
        s3Client = S3Client(config: s3Config)
        
        print("  - S3 client initialized")
    }
    
    func initializeMinIOClient() {
        print("  - Initializing MinIO client...")
        
        // MinIO configuration
        let minioConfig = MinIOConfig(
            endpoint: "http://localhost:9000",
            accessKey: "minio_access_key",
            secretKey: "minio_secret_key"
        )
        
        minioClient = MinIOClient(config: minioConfig)
        
        print("  - MinIO client initialized")
    }
    
    func initializeCephClient() {
        print("  - Initializing Ceph client...")
        
        // Ceph configuration
        let cephConfig = CephConfig(
            endpoint: "http://localhost:7480",
            accessKey: "ceph_access_key",
            secretKey: "ceph_secret_key"
        )
        
        cephClient = CephClient(config: cephConfig)
        
        print("  - Ceph client initialized")
    }
    
    func testObjectStorageOperations() {
        print("Testing Object Storage operations...")
        
        // 测试S3 operations
        testS3Operations()
        
        // 测试MinIO operations
        testMinIOOperations()
        
        // 测试Ceph operations
        testCephOperations()
        
        // 测试性能
        testPerformance()
    }
    
    func testS3Operations() {
        print("Test 1: S3 Operations")
        
        guard let client = s3Client else {
            print("  - S3 client not initialized")
            return
        }
        
        print("  - Testing bucket operations...")
        
        // 创建bucket测试
        let createBucketResult = client.createBucket(name: "test-bucket")
        print("    Create bucket: \(createBucketResult.success ? "SUCCESS" : "FAILED")")
        
        // 列出buckets测试
        let listBucketsResult = client.listBuckets()
        print("    List buckets: \(listBucketsResult.success ? "SUCCESS" : "FAILED")")
        
        print("  - Testing object operations...")
        
        // 上传object测试
        let uploadResult = client.uploadObject(
            bucket: "test-bucket",
            key: "test-object.txt",
            data: "Test data".data(using: .utf8)!
        )
        print("    Upload object: \(uploadResult.success ? "SUCCESS" : "FAILED")")
        
        // 下载object测试
        let downloadResult = client.downloadObject(
            bucket: "test-bucket",
            key: "test-object.txt"
        )
        print("    Download object: \(downloadResult.success ? "SUCCESS" : "FAILED")")
        
        // 删除object测试
        let deleteResult = client.deleteObject(
            bucket: "test-bucket",
            key: "test-object.txt"
        )
        print("    Delete object: \(deleteResult.success ? "SUCCESS" : "FAILED")")
    }
    
    func testMinIOOperations() {
        print("Test 2: MinIO Operations")
        
        guard let client = minioClient else {
            print("  - MinIO client not initialized")
            return
        }
        
        print("  - Testing MinIO operations (S3-compatible)...")
        
        // MinIO使用S3-compatible API
        let result = client.testConnection()
        print("    Connection test: \(result.success ? "SUCCESS" : "FAILED")")
    }
    
    func testCephOperations() {
        print("Test 3: Ceph Operations")
        
        guard let client = cephClient else {
            print("  - Ceph client not initialized")
            return
        }
        
        print("  - Testing Ceph RADOS Gateway operations...")
        
        // Ceph RADOS Gateway使用S3-compatible API
        let result = client.testConnection()
        print("    Connection test: \(result.success ? "SUCCESS" : "FAILED")")
    }
    
    func testPerformance() {
        print("Test 4: Performance Test")
        
        print("  - Testing upload throughput...")
        print("    Target: >100 MB/s for large objects")
        
        print("  - Testing download throughput...")
        print("    Target: >100 MB/s for large objects")
        
        print("  - Testing concurrent operations...")
        print("    Target: 10 concurrent uploads/downloads")
    }
    
    override func Stop() -> IOReturn {
        print("ObjectStorageTestDriver stopping...")
        
        // 清理客户端
        s3Client = nil
        minioClient = nil
        cephClient = nil
        
        return super.Stop()
    }
    
    deinit {
        print("ObjectStorageTestDriver deinitialized")
    }
}

// S3 Configuration
struct S3Config {
    let endpoint: String
    let region: String
    let accessKey: String
    let secretKey: String
}

// MinIO Configuration
struct MinIOConfig {
    let endpoint: String
    let accessKey: String
    let secretKey: String
}

// Ceph Configuration
struct CephConfig {
    let endpoint: String
    let accessKey: String
    let secretKey: String
}

// S3 Client (placeholder implementation)
class S3Client {
    let config: S3Config
    
    init(config: S3Config) {
        self.config = config
    }
    
    func createBucket(name: String) -> OperationResult {
        // Placeholder: create bucket
        return OperationResult(success: true, message: "Bucket created")
    }
    
    func listBuckets() -> OperationResult {
        // Placeholder: list buckets
        return OperationResult(success: true, message: "Buckets listed")
    }
    
    func uploadObject(bucket: String, key: String, data: Data) -> OperationResult {
        // Placeholder: upload object
        return OperationResult(success: true, message: "Object uploaded")
    }
    
    func downloadObject(bucket: String, key: String) -> OperationResult {
        // Placeholder: download object
        return OperationResult(success: true, message: "Object downloaded")
    }
    
    func deleteObject(bucket: String, key: String) -> OperationResult {
        // Placeholder: delete object
        return OperationResult(success: true, message: "Object deleted")
    }
}

// MinIO Client (placeholder implementation)
class MinIOClient {
    let config: MinIOConfig
    
    init(config: MinIOConfig) {
        self.config = config
    }
    
    func testConnection() -> OperationResult {
        // Placeholder: test MinIO connection
        return OperationResult(success: true, message: "MinIO connected")
    }
}

// Ceph Client (placeholder implementation)
class CephClient {
    let config: CephConfig
    
    init(config: CephConfig) {
        self.config = config
    }
    
    func testConnection() -> OperationResult {
        // Placeholder: test Ceph connection
        return OperationResult(success: true, message: "Ceph connected")
    }
}

// Operation Result
struct OperationResult {
    let success: Bool
    let message: String
}