import Foundation
import DriverKit
import SCSIControllerDriverKit

class NVMeTestDriver: IOSCSIController {
    
    // 尝试使用SCSI Controller API访问NVMe设备
    // 验证SCSI Controller Entitlement是否包含Block Storage Device operations
    
    override init() {
        super.init()
        print("NVMeTestDriver initializing...")
    }
    
    override func Start() -> IOReturn {
        print("NVMeTestDriver Start() called")
        
        // 尝试初始化
        let result = super.Start()
        
        if result == kIOReturnSuccess {
            print("NVMeTestDriver started successfully")
            
            // 测试NVMe操作
            testNVMeOperations()
        } else {
            print("NVMeTestDriver start failed: \(result)")
        }
        
        return result
    }
    
    func testNVMeOperations() {
        print("Testing NVMe operations using SCSI Controller API...")
        
        // 测试场景1: 尝试识别NVMe设备
        testDeviceIdentification()
        
        // 测试场景2: 尝试基本读写
        testBasicReadWrite()
        
        // 测试场景3: 尝试性能测试
        testPerformance()
    }
    
    func testDeviceIdentification() {
        print("Test 1: Device Identification")
        
        // 尝试使用SCSI命令识别设备
        // 如果是NVMe设备，可能会返回NVMe-specific信息
        
        print("  - Attempting SCSI INQUIRY command...")
        print("  - Checking if device responds as NVMe...")
        
        // 注意：这里只是测试代码，不会实际执行
        // 实际执行需要编译和运行
    }
    
    func testBasicReadWrite() {
        print("Test 2: Basic Read/Write")
        
        // 尝试基本读写操作
        print("  - Attempting basic read operation...")
        print("  - Attempting basic write operation...")
        
        // 检查是否有权限错误
        print("  - Checking for permission errors...")
    }
    
    func testPerformance() {
        print("Test 3: Performance Test")
        
        // 尝试性能测试
        print("  - Target: 6000-7000 MB/s")
        print("  - Testing Thunderbolt 5 bandwidth...")
        
        // 检查实际性能
        print("  - Measuring actual throughput...")
    }
    
    override func Stop() -> IOReturn {
        print("NVMeTestDriver stopping...")
        return super.Stop()
    }
    
    deinit {
        print("NVMeTestDriver deinitialized")
    }
}