#include "MainWindow.h"
#include "NetworkManager.h"
#include "SshClient.h"
#include "Logger.h"

#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QFormLayout>
#include <QMessageBox>
#include <QFile>
#include <QRegularExpression>
#include <QDateTime>
#include <QCoreApplication>
#include <QScreen>
#include <QGuiApplication>

static const char *kInterfacesPath = "/etc/network/interfaces";
// 尝试在存在参考文件时使用其前缀以保持格式一致

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent),
    ipInput(new QLineEdit(this)),
    macInput(new QLineEdit(this)),
    currentMacLabel(new QLabel("当前MAC: 未读取", this)),
    modifyButton(new QPushButton("修改MAC", this)),
    backupButton(new QPushButton("备份文件", this)),
    logView(new QTextEdit(this)),
    useSshCheck(new QCheckBox("使用SSH远程执行", this)),
    sshUserInput(new QLineEdit(this)),
    sshPassInput(new QLineEdit(this)),
    presetPassCombo(new QComboBox(this)),
    connectButton(new QPushButton("连接", this)),
    refreshButton(new QPushButton("刷新", this)),
    netMgr(new NetworkManager(this)),
    sshClient(new SshClient(this)),
    logger(new Logger(this))
{
    setWindowTitle("MAC修改工具");
    logView->setReadOnly(true);

    // 根据屏幕分辨率自适应调整日志框大小
    QScreen *screen = QGuiApplication::primaryScreen();
    if (screen) {
        QRect screenGeometry = screen->availableGeometry();
        int screenWidth = screenGeometry.width();
        int screenHeight = screenGeometry.height();

        // 日志框宽度为屏幕宽度的 25-30%，最小 390px
        int logWidth = qMax(390, static_cast<int>(screenWidth * 0.25));
        // 日志框高度为屏幕高度的 40-50%，最小 410px
        int logHeight = qMax(410, static_cast<int>(screenHeight * 0.4));

        logView->setMinimumWidth(logWidth);
        logView->setMinimumHeight(logHeight);
    } else {
        // 如果无法获取屏幕信息，使用默认值
        logView->setMinimumWidth(390);
        logView->setMinimumHeight(410);
    }

    sshPassInput->setEchoMode(QLineEdit::Password);

    auto *central = new QWidget(this);
    auto *layout = new QVBoxLayout(central);

    auto *form = new QFormLayout();
    form->addRow("SSH主机/IP", ipInput);
    presetIpCombo = new QComboBox(this);
    presetIpCombo->addItem("自定义");
    presetIpCombo->addItem("圆通");
    presetIpCombo->addItem("拼多多");
    form->addRow("内置IP", presetIpCombo);
    form->addRow("SSH用户", sshUserInput);
    presetPassCombo->addItem("自定义");
    presetPassCombo->addItem("圆通");
    presetPassCombo->addItem("拼多多");
    presetPassCombo->addItem("兔喜");
    form->addRow("内置密码", presetPassCombo);
    form->addRow("登录密码", sshPassInput);
    form->addRow("修改MAC地址", macInput);
    // 在“当前MAC”行右侧添加 连接/刷新 按钮
    QWidget *macButtonsWidget = new QWidget(this);
    auto *macBtnsLayout = new QHBoxLayout(macButtonsWidget);
    macBtnsLayout->setContentsMargins(0,0,0,0);
    macBtnsLayout->addWidget(connectButton);
    macBtnsLayout->addWidget(refreshButton);
    form->addRow(currentMacLabel, macButtonsWidget);
    layout->addLayout(form);

    auto *btns = new QHBoxLayout();
    btns->addWidget(backupButton);
    btns->addWidget(modifyButton);
    layout->addLayout(btns);

    layout->addWidget(useSshCheck);
    useSshCheck->setChecked(true);
    useSshCheck->hide();
    connect(useSshCheck, &QCheckBox::toggled, this, &MainWindow::onSshModeToggled);

    layout->addWidget(new QLabel("日志", this));
    layout->addWidget(logView);
    setCentralWidget(central);

    connect(modifyButton, &QPushButton::clicked, this, &MainWindow::onModifyClicked);
    connect(backupButton, &QPushButton::clicked, this, &MainWindow::onBackupClicked);
    connect(connectButton, &QPushButton::clicked, this, &MainWindow::onConnectClicked);
    connect(refreshButton, &QPushButton::clicked, this, &MainWindow::onRefreshClicked);
    connect(presetPassCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &MainWindow::onPresetPassChanged);
    connect(presetIpCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &MainWindow::onPresetIpChanged);

    // 默认使用SSH远程执行，提供占位提示
    useSshCheck->setChecked(true);
    ipInput->setPlaceholderText("例: 10.10.12.12/hostname");
    macInput->setText("90:A9:F7:30:00:00");
    sshUserInput->setText("root");
    sshPassInput->setPlaceholderText("登录密码");

    updateCurrentMac();
}

MainWindow::~MainWindow() {}

void MainWindow::log(const QString &msg) {
    QString ts = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");
    QString line = ts + " - " + msg;
    logger->append(msg);
    logView->append(line);
    logView->append("");
}

QString MainWindow::generateMacFromIp(const QString &ip) {
    // 简单示例：固定前缀90:A9:F7:30，根据IP最后两段计算两个字节，末尾固定00
    QRegularExpression re("^(?:\\d{1,3}\\.){3}\\d{1,3}$");
    if (!re.match(ip).hasMatch()) return {};
    auto parts = ip.split('.');
    if (parts.size() != 4) return {};
    bool ok1=false, ok2=false;
    int p2 = parts[2].toInt(&ok1);
    int p3 = parts[3].toInt(&ok2);
    if (!ok1 || !ok2) return {};
    auto toHexByte = [](int v){ v = qBound(0, v, 255); return QString("%1").arg(v,2,16,QChar('0')).toUpper(); };
    QString mac = QString("90:A9:F7:30:%1:%2").arg(toHexByte(p2))
                      .arg(toHexByte(p3));
    return mac;
}

bool MainWindow::isValidMac(const QString &mac) const {
    QRegularExpression mre("^[0-9A-Fa-f]{2}(:[0-9A-Fa-f]{2}){5}$");
    return mre.match(mac).hasMatch();
}

void MainWindow::updateCurrentMac() {
    if (useSshCheck->isChecked() && !sshConnected) {
        setCurrentMacStatus("当前MAC: 未连接主机", false);
        return;
    }
    auto mac = netMgr->readCurrentMac(kInterfacesPath);
    if (mac.isEmpty()) {
        setCurrentMacStatus("当前MAC: 未找到或读取失败", false);
    } else {
        setCurrentMacStatus("当前MAC: " + mac, true);
    }
}

void MainWindow::onBackupClicked() {
    QString err;

    // 检查是否使用 SSH 远程模式
    if (useSshCheck->isChecked()) {
        QString host = ipInput->text().trimmed();
        QString user = sshUserInput->text().trimmed();
        QString password = sshPassInput->text().trimmed();

        if (host.isEmpty() || user.isEmpty()) {
            QMessageBox::warning(this, "参数错误", "请先填写IP地址和SSH用户名");
            return;
        }

        // 使用 SshClient 执行远程备份
        SshClient ssh;
        if (!ssh.backupRemoteFile(host, user, password, kInterfacesPath, &err)) {
            QMessageBox::critical(this, "备份失败", err);
            log("备份失败: " + err);
            return;
        }

        QMessageBox::information(this, "备份完成", "已在远程服务器备份到 " + QString(kInterfacesPath) + ".bak");
        log("已备份远程 interfaces 文件");
        return;
    }

    // 本地模式
    if (!netMgr->backupFile(kInterfacesPath, &err)) {
        QMessageBox::critical(this, "备份失败", err);
        log("备份失败: " + err);
        return;
    }
    QMessageBox::information(this, "备份完成", "已备份到同目录 .bak 文件");
    log("已备份 interfaces 文件");
}

void MainWindow::onModifyClicked() {
    QString ip = ipInput->text().trimmed();
    QString mac = macInput->text().trimmed();
    if (mac.isEmpty()) mac = generateMacFromIp(ip);
    if (!isValidMac(mac)) {
        QMessageBox::warning(this, "输入错误", "MAC地址格式错误，需形如AA:BB:CC:DD:EE:FF");
        return;
    }

    if (useSshCheck->isChecked()) {
        // 通过SSH远程执行修改
        QString host = ipInput->text().trimmed();
        QString user = sshUserInput->text().trimmed();
        QString auth = QString("密码");
        QString secret = sshPassInput->text();
        QString err;
        QString refPath = QCoreApplication::applicationDirPath() + "/interfaces";
        QString useRef = QFile::exists(refPath) ? refPath : QString();
        bool ok = sshClient->applyMacRemote(host, user, auth, secret, mac, kInterfacesPath, useRef, &err);
        if (!ok) {
            QMessageBox::critical(this, "远程修改失败", err);
            log("远程修改失败: " + err);
            return;
        }
        QMessageBox::information(this, "远程修改完成", "已通过SSH修改MAC");
        log("远程修改完成");
        if (!err.isEmpty()) log(err);
        onRefreshClicked();
    } else {
        // 本地修改
        QString err;
        if (!netMgr->ensureRootPermission(&err)) {
            QMessageBox::critical(this, "权限不足", err);
            log("权限不足: " + err);
            return;
        }
        QString refPath = QCoreApplication::applicationDirPath() + "/interfaces";
        QString useRef = QFile::exists(refPath) ? refPath : QString();
        if (!netMgr->applyMacLocal(kInterfacesPath, useRef, mac, &err)) {
            QMessageBox::critical(this, "修改失败", err);
            log("修改失败: " + err);
            return;
        }
        QMessageBox::information(this, "修改完成", "MAC地址已更新");
        log("本地修改完成，更新MAC为: " + mac);
        updateCurrentMac();
    }
}

void MainWindow::onConnectClicked() {
    // 连接：尝试读取远程当前MAC
    QString host = ipInput->text().trimmed();
    QString user = sshUserInput->text().trimmed();
    QString secret = sshPassInput->text();
    QString err;
    // 远端读取：复用 applyMacRemote 的读取函数（将实现）
    QString remoteMac;
    if (sshClient->readRemoteCurrentMac(host, user, secret, kInterfacesPath, &remoteMac, &err)) {
        setCurrentMacStatus("当前MAC: " + remoteMac, true);
        log("已连接并读取远程MAC: " + remoteMac);
        sshConnected = true;
    } else {
        QMessageBox::critical(this, "连接失败", err);
        log("连接失败: " + err);
        sshConnected = false;
        setCurrentMacStatus("当前MAC: 未连接主机", false);
    }
}

void MainWindow::onRefreshClicked() {
    // 刷新当前MAC（根据是否使用SSH选择本地或远程）
    if (useSshCheck->isChecked()) {
        QString host = ipInput->text().trimmed();
        QString user = sshUserInput->text().trimmed();
        QString secret = sshPassInput->text();
        QString err;
        QString remoteMac;
        if (sshClient->readRemoteCurrentMac(host, user, secret, kInterfacesPath, &remoteMac, &err)) {
            setCurrentMacStatus("当前MAC: " + remoteMac, true);
            log("已刷新远程MAC: " + remoteMac);
            sshConnected = true;
        } else {
            QMessageBox::warning(this, "刷新失败", err);
            log("刷新失败: " + err);
            sshConnected = false;
            setCurrentMacStatus("当前MAC: 未连接主机", false);
        }
    } else {
        updateCurrentMac();
        log("已刷新本地MAC");
    }
}

void MainWindow::onPresetPassChanged(int idx) {
    switch (idx) {
    case 1:
        sshPassInput->setText("&Over#B0Ost!");
        break;
    case 2:
        sshPassInput->setText("PddloTSecPwdOnly!");
        break;
    case 3:
        sshPassInput->setText("TxApPwd#2025!");
        break;
    default:
        // 自定义：不覆盖用户输入，可选择清空
        // sshPassInput->clear();
        break;
    }
}

void MainWindow::onPresetIpChanged(int idx) {
    switch (idx) {
    case 1:
        ipInput->setText("192.168.172.173");
        break;
    case 2:
        ipInput->setText("10.10.12.12");
        break;
    default:
        // 自定义：不强制覆盖，保留用户当前输入
        break;
    }
}

void MainWindow::onSshModeToggled(bool checked) {
    sshConnected = false;
    updateCurrentMac();
}

void MainWindow::setCurrentMacStatus(const QString &text, bool ok) {
    currentMacLabel->setText(text);
    QPalette pal = currentMacLabel->palette();
    pal.setColor(QPalette::WindowText, ok ? QColor(0, 128, 0) : QColor(200, 0, 0));
    currentMacLabel->setPalette(pal);
}