import java.io.*;
import java.util.*;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

public class MultiChannelUSBTester {
    private static final int BAUD_RATE = 9600;
    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern("HH:mm:ss");
    private static final String LOG_FILE = "usb_controller_java.log";
    
    private String portName;
    private boolean isConnected = false;
    private List<String> commandHistory = new ArrayList<>();
    
    public MultiChannelUSBTester(String portName) {
        this.portName = portName;
    }
    
    public boolean connect() {
        // Java串口通信需要额外的库（如RXTX或javax.comm）
        // 这里使用模拟实现，实际使用时需要导入相应的库
        System.out.println("连接到 " + portName + "，波特率 " + BAUD_RATE);
        System.out.println("⚠️  注意: 这是一个模拟实现，实际使用需要RXTX或javax.comm库");
        
        try {
            // 模拟连接成功
            Thread.sleep(500);
            isConnected = true;
            System.out.println("✅ 连接成功");
            return true;
        } catch (Exception e) {
            System.err.println("❌ 连接失败: " + e.getMessage());
            return false;
        }
    }
    
    private String sendCommandSimulation(String command) {
        String timestamp = LocalTime.now().format(TIME_FORMATTER);
        System.out.println("[" + timestamp + "] 📤 发送: " + command);
        logToFile("[" + timestamp + "] SEND: " + command);
        
        // 模拟响应
        try {
            Thread.sleep(300);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
        
        String response = "";
        String cmdUpper = command.toUpperCase();
        
        if (cmdUpper.equals("HELP")) {
            response = "Commands (case-insensitive):\n" +
                      " HELP      - Display the list of available commands.\n" +
                      " POWER N   - Toggle the Power Channel N. (Required: N=1~8)\n" +
                      " PC        - Toggle the PC Channel.\n" +
                      " OFF       - Turn off all channels.\n" +
                      " STATUS    - Show current USB configuration status.";
        } else if (cmdUpper.startsWith("POWER ")) {
            String[] parts = command.split(" ");
            if (parts.length == 2) {
                try {
                    int channel = Integer.parseInt(parts[1]);
                    if (channel >= 1 && channel <= 8) {
                        response = "Power mode on channel " + channel;
                    } else {
                        response = "Error: Channel must be 1-8";
                    }
                } catch (NumberFormatException e) {
                    response = "Error: Invalid channel number";
                }
            } else {
                response = "Error: Invalid command format";
            }
        } else if (cmdUpper.equals("PC")) {
            response = "PC data mode";
        } else if (cmdUpper.equals("OFF")) {
            response = "Standby mode on all channels";
        } else if (cmdUpper.equals("STATUS")) {
            response = "Status: Standby\nChannel: N/A";
        } else {
            response = "Error: Unknown command";
        }
        
        System.out.println("[" + timestamp + "] 📥 收到: " + response);
        logToFile("[" + timestamp + "] RECV: " + response);
        return response;
    }
    
    public String sendCommand(String command) {
        if (!isConnected) {
            System.err.println("❌ 未连接到设备");
            return null;
        }
        
        // 实际实现中这里应该使用串口通信
        // 现在使用模拟实现
        return sendCommandSimulation(command);
    }
    
    public void basicFunctionalTest() {
        System.out.println("\n" + "=".repeat(60));
        System.out.println("🔧 基础功能测试");
        System.out.println("=".repeat(60));
        
        String[][] testSteps = {
            {"1. 显示帮助信息", "HELP"},
            {"2. 查询初始状态", "STATUS"},
            {"3. 打开电源通道1", "POWER 1"},
            {"4. 打开电源通道3", "POWER 3"},
            {"5. 打开电源通道5", "POWER 5"},
            {"6. 查询当前状态", "STATUS"},
            {"7. 切换PC数据通道", "PC"},
            {"8. 查询PC模式状态", "STATUS"},
            {"9. 关闭所有通道", "OFF"},
            {"10. 最终状态确认", "STATUS"}
        };
        
        for (String[] step : testSteps) {
            System.out.println("\n" + step[0]);
            String response = sendCommand(step[1]);
            if (response != null && !response.isEmpty()) {
                System.out.println("  响应: " + response);
            }
            try {
                Thread.sleep(300);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }
        
        System.out.println("\n✅ 基础功能测试完成");
    }
    
    public void channelComprehensiveTest() {
        System.out.println("\n" + "=".repeat(60));
        System.out.println("🧪 通道综合测试");
        System.out.println("=".repeat(60));
        
        // 测试所有电源通道
        System.out.println("\n🔌 测试所有电源通道 (1-8):");
        for (int channel = 1; channel <= 8; channel++) {
            System.out.println("\n  测试通道 " + channel + ":");
            String response = sendCommand("POWER " + channel);
            if (response != null) {
                System.out.println("    响应: " + response);
            }
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }
        
        // 查询状态
        sendCommand("STATUS");
        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
        
        // 随机切换测试
        System.out.println("\n🎲 随机通道切换测试:");
        Random random = new Random();
        for (int i = 0; i < 10; i++) {
            int channel = random.nextInt(8) + 1;
            System.out.println("  操作 " + (i + 1) + ": POWER " + channel);
            sendCommand("POWER " + channel);
            try {
                Thread.sleep(150);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }
        
        // PC模式测试
        System.out.println("\n💻 PC数据通道测试:");
        sendCommand("PC");
        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
        sendCommand("STATUS");
        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
        
        // 关闭所有
        System.out.println("\n🔚 清理测试:");
        sendCommand("OFF");
        sendCommand("STATUS");
        
        System.out.println("\n✅ 通道综合测试完成");
    }
    
    public void interactiveMode() {
        System.out.println("\n" + "=".repeat(60));
        System.out.println("💬 交互模式");
        System.out.println("=".repeat(60));
        
        String helpText = """
            可用命令:
              HELP                 - 显示帮助信息
              POWER <1-8>          - 切换指定电源通道
              PC                   - 切换PC数据通道
              OFF                  - 关闭所有通道
              STATUS              - 查询当前状态
              TEST basic          - 运行基础功能测试
              TEST channel        - 运行通道综合测试
              TEST boundary       - 运行边界条件测试
              TEST performance    - 运行性能测试
              HISTORY             - 显示命令历史
              CLEAR               - 清除屏幕
              QUIT / EXIT         - 退出交互模式
            """;
        
        System.out.println(helpText);
        
        Scanner scanner = new Scanner(System.in);
        
        while (true) {
            System.out.print("\n🔧 USB> ");
            String userInput = scanner.nextLine().trim();
            
            if (userInput.isEmpty()) {
                continue;
            }
            
            // 添加到历史
            commandHistory.add(userInput);
            
            // 处理特殊命令
            if (userInput.equalsIgnoreCase("quit") || 
                userInput.equalsIgnoreCase("exit") || 
                userInput.equalsIgnoreCase("q")) {
                System.out.println("👋 退出交互模式");
                break;
            } else if (userInput.equalsIgnoreCase("history")) {
                System.out.println("\n📜 命令历史:");
                int startIndex = Math.max(0, commandHistory.size() - 10);
                for (int i = startIndex; i < commandHistory.size(); i++) {
                    System.out.printf("  %2d. %s%n", i - startIndex + 1, commandHistory.get(i));
                }
            } else if (userInput.equalsIgnoreCase("clear")) {
                // 清除屏幕（跨平台）
                System.out.print("\033[H\033[2J");
                System.out.flush();
                System.out.println(helpText);
            } else if (userInput.toLowerCase().startsWith("test ")) {
                String testType = userInput.substring(5).toLowerCase();
                switch (testType) {
                    case "basic":
                        basicFunctionalTest();
                        break;
                    case "channel":
                        channelComprehensiveTest();
                        break;
                    case "boundary":
                        runBoundaryTest();
                        break;
                    case "performance":
                        runPerformanceTest(30);
                        break;
                    default:
                        System.out.println("⚠️  未知测试类型: " + testType);
                        break;
                }
            } else {
                // 发送原始命令
                String response = sendCommand(userInput);
                if (response != null && !response.isEmpty()) {
                    System.out.println("📥 响应: " + response);
                } else {
                    System.out.println("⚠️  无响应");
                }
            }
        }
        
        scanner.close();
    }
    
    private void runBoundaryTest() {
        System.out.println("\n" + "=".repeat(60));
        System.out.println("⚠️  边界条件测试");
        System.out.println("=".repeat(60));
        
        // 有效边界测试
        String[][] validTests = {
            {"有效边界: 通道1", "POWER 1"},
            {"有效边界: 通道8", "POWER 8"},
            {"PC模式切换", "PC"},
            {"关闭所有", "OFF"}
        };
        
        for (String[] test : validTests) {
            System.out.println("\n" + test[0]);
            String response = sendCommand(test[1]);
            System.out.println("  响应: " + response);
            try {
                Thread.sleep(300);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }
        
        // 无效命令测试
        System.out.println("\n❌ 无效命令测试:");
        String[][] invalidTests = {
            {"通道0", "POWER 0"},
            {"通道9", "POWER 9"},
            {"负值通道", "POWER -1"},
            {"非数字通道", "POWER abc"},
            {"空参数", "POWER "},
            {"无效命令", "INVALID"}
        };
        
        for (String[] test : invalidTests) {
            System.out.println("\n  测试 " + test[0] + ": " + test[1]);
            String response = sendCommand(test[1]);
            if (response != null && !response.isEmpty()) {
                System.out.println("    响应: " + response);
            }
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }
        
        System.out.println("\n✅ 边界条件测试完成");
    }
    
    private void runPerformanceTest(int iterations) {
        System.out.println("\n" + "=".repeat(60));
        System.out.println("⚡ 性能测试");
        System.out.println("=".repeat(60));
        
        System.out.println("\n执行 " + iterations + " 次快速切换测试...");
        long startTime = System.currentTimeMillis();
        
        int successfulCommands = 0;
        int failedCommands = 0;
        Random random = new Random();
        String[] commandTypes = {"POWER", "PC", "STATUS", "OFF"};
        
        for (int i = 0; i < iterations; i++) {
            String command;
            String commandType = commandTypes[random.nextInt(commandTypes.length)];
            
            if (commandType.equals("POWER")) {
                int channel = random.nextInt(8) + 1;
                command = "POWER " + channel;
            } else {
                command = commandType;
            }
            
            String response = sendCommand(command);
            
            if (response != null && !response.isEmpty() && !response.startsWith("Error")) {
                successfulCommands++;
            } else {
                failedCommands++;
            }
            
            // 每10次显示进度
            if ((i + 1) % 10 == 0) {
                System.out.println("  进度: " + (i + 1) + "/" + iterations);
            }
            
            try {
                Thread.sleep(80);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }
        
        long endTime = System.currentTimeMillis();
        double totalTime = (endTime - startTime) / 1000.0;
        
        // 统计结果
        System.out.println("\n📊 性能测试结果:");
        System.out.printf("  总时间: %.2f秒%n", totalTime);
        System.out.printf("  平均响应时间: %.1f毫秒%n", totalTime / iterations * 1000);
        System.out.println("  成功命令: " + successfulCommands);
        System.out.println("  失败命令: " + failedCommands);
        System.out.printf("  成功率: %.1f%%%n", (double) successfulCommands / iterations * 100);
        
        // 最终状态
        sendCommand("OFF");
        try {
            Thread.sleep(300);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
        sendCommand("STATUS");
        
        System.out.println("\n✅ 性能测试完成");
    }
    
    public void disconnect() {
        if (isConnected) {
            sendCommand("OFF");
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
            
            isConnected = false;
            System.out.println("🔌 连接已关闭");
        }
    }
    
    private void logToFile(String message) {
        try (PrintWriter writer = new PrintWriter(new FileWriter(LOG_FILE, true))) {
            writer.println(message);
        } catch (IOException e) {
            System.err.println("❌ 无法写入日志文件: " + e.getMessage());
        }
    }
    
    public static void main(String[] args) {
        System.out.println("\n" + "=".repeat(60));
        System.out.println("🚀 多通道USB控制器测试程序 (Java版本)");
        System.out.println("=".repeat(60));
        
        String portName = "COM3";
        String testType = "basic";
        boolean interactive = false;
        
        // 解析命令行参数
        for (int i = 0; i < args.length; i++) {
            switch (args[i]) {
                case "--port":
                    if (i + 1 < args.length) portName = args[++i];
                    break;
                case "--test":
                    if (i + 1 < args.length) testType = args[++i];
                    break;
                case "--interactive":
                    interactive = true;
                    break;
                case "--help":
                    showHelp();
                    return;
            }
        }
        
        MultiChannelUSBTester tester = new MultiChannelUSBTester(portName);
        
        if (tester.connect()) {
            try {
                if (interactive) {
                    tester.interactiveMode();
                } else {
                    switch (testType.toLowerCase()) {
                        case "basic":
                            tester.basicFunctionalTest();
                            break;
                        case "channel":
                            tester.channelComprehensiveTest();
                            break;
                        case "boundary":
                            tester.runBoundaryTest();
                            break;
                        case "performance":
                            tester.runPerformanceTest(50);
                            break;
                        case "all":
                            tester.basicFunctionalTest();
                            Thread.sleep(1000);
                            tester.channelComprehensiveTest();
                            Thread.sleep(1000);
                            tester.runBoundaryTest();
                            Thread.sleep(1000);
                            tester.runPerformanceTest(30);
                            break;
                        default:
                            System.out.println("⚠️  未知测试类型，运行基础测试");
                            tester.basicFunctionalTest();
                            break;
                    }
                }
            } catch (Exception e) {
                System.err.println("❌ 测试过程中出错: " + e.getMessage());
            } finally {
                tester.disconnect();
                System.out.println("\n🎉 测试程序执行完成");
                System.out.println("📝 详细日志保存在: " + LOG_FILE);
            }
        }
    }
    
    private static void showHelp() {
        System.out.println("""
            多通道USB控制器测试工具 (Java版本)
            
            用法: java MultiChannelUSBTester [选项]
            
            选项:
              --port <端口>      串口端口 (默认: COM3)
              --test <类型>      测试类型: basic, channel, boundary, performance, all
              --interactive      进入交互模式
              --help             显示帮助信息
            
            示例:
              java MultiChannelUSBTester --port COM3 --test basic
              java MultiChannelUSBTester --port COM4 --interactive
              java MultiChannelUSBTester --test all
            """);
    }
}