#include "hostthread.h"
#include "qdebug.h"
#include "qjsonarray.h"
#include "qjsonobject.h"

#include <QFile>
#include <QProcess>
#include <QRegularExpression>
#include <QString>
#include <QTextStream>

#include <api/hostsapi.h>
/*
# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.
#	127.0.0.1       localhost
#	::1             localhost

127.0.0.1       activate.navicat.com

127.0.0.1 example.com 
*/

static void ipconfigFlushdns()
{
    // 创建 QProcess 对象
    QProcess process;

    // 设置要执行的命令和参数
    process.start("ipconfig", QStringList() << "/flushdns");

    // 等待命令执行完成
    process.waitForFinished();

    // 获取命令输出（如果有的话）
    auto output = process.readAllStandardOutput();
    auto errorOutput = process.readAllStandardError();

    // 输出结果
    if (!output.isEmpty()) {
        qDebug() << "Command output:" << QString::fromLocal8Bit(output);
    }
    if (!errorOutput.isEmpty()) {
        qDebug() << "Command error:" << errorOutput;
    }
}
static bool modifyHostsFile(const QString &hostname, const QString &ipAddress, bool action)
{
    QString hostsFilePath;

#ifdef Q_OS_WIN
    hostsFilePath = "C:/Windows/System32/drivers/etc/hosts";
#else
    hostsFilePath = "/etc/hosts";
#endif

    // 打开hosts文件
    QFile file(hostsFilePath);
    if (!file.open(QIODevice::ReadWrite | QIODevice::Text)) {
        qWarning() << "无法打开文件" << hostsFilePath;
        return false;
    }
    // 读取文件内容
    QTextStream stream(&file);
    QStringList fileLines;
    QRegularExpression regex(
        R"RX(^(#?\s*)(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\s+([a-zA-Z0-9.-]+)(\s+#.*)?$)RX");

    bool isExist = false;
    while (!stream.atEnd()) {
        QString line = stream.readLine(); // 读取一行
        fileLines.append(line);           // 保存当前行
        QRegularExpressionMatch expressionMatch = regex.match(line);
        if (expressionMatch.hasMatch()) {
            const QString url = expressionMatch.captured(3);
            if (url.compare(hostname) == 0) {
                if (action) { // 添加
                    qDebug() << "---------------add" << url;
                    qDebug() << "已存在，进行添加操作: " << url;
                    fileLines.removeOne(line);
                } else {
                    qDebug() << "---------------remove" << url;
                    qDebug() << "删除操作: " << url;
                    fileLines.removeOne(line);
                }
            }
        }
    }
    // 如果是添加操作并且记录不存在，添加新条目
    if (!isExist && action) {
        QString newLine = QString("%1 %2").arg(ipAddress).arg(hostname);
        fileLines.append(newLine); // 将新的条目添加到文件末尾
        qDebug() << "添加新的条目: " << newLine;
    }

    // 重写文件内容
    file.resize(0); // 清空文件内容
    QTextStream out(&file);
    for (const QString &line : fileLines) {
        out << line << "\n";
    }

    file.close();
    ipconfigFlushdns();
    return true;
}

// HostThread::HostThread()
// {
//     if (modifyHostsFile("example.com", "127.0.0.1")) {
//         qDebug() << "Hosts 文件已成功更新。";
//     } else {
//         qDebug() << "修改失败。";
//     }
// }

HostThread::HostThread(QObject *parent) {}

void HostThread::upDataHost()
{
    TC::HostsApi hostsApi;
    const auto serverArray = hostsApi.get();

    QSet<QString> addressSet;       // 添加
    QSet<QString> removeAddressSet; // 取消
    for (const QJsonValue &item : serverArray) {
        if (!item.isObject()) {
            return;
        }
        const QJsonObject object = item.toObject();
        const QString name = object["address"].toString();
        if (object.contains("value")) {
            if (object["value"].toString() == "-1" || object["value"].toInt() == -1) {
                addressSet.insert(name);
                modifyHostsFile(name, "127.0.0.1", true);
            } else {
                removeAddressSet.insert(name);
                modifyHostsFile(name, "127.0.0.1", false);
            }
        }
    }

    // if (modifyHostsFile("example.com", "127.0.0.1", true)) {
    //     qDebug() << "Hosts 文件已成功更新。";
    // } else {
    //     qDebug() << "修改失败。";
    // }
}

void HostThread::run()
{
    QElapsedTimer timer; // 创建高精度计时器
    timer.start();       // 启动计时器

    upDataHost();

    while (true) {
        // 校验网络
        if (timer.elapsed() >= 30 * 1000) {
            timer.restart();

            upDataHost();
        }
        msleep(1000); // 休息1秒
    }
}