#include "mainwidget.h"
#include "./ui_mainwidget.h"
#include <QDir>
#include <QMessageBox>
#include <regex>

CTryReg::CTryReg(QWidget* parent) : QWidget(parent), ui(new Ui::CTryReg)
{
    ui->setupUi(this);

    setWindowTitle("STD_REG 1.0");
    ui->edRet->setReadOnly(true);
    connect(ui->btnSearch, &QPushButton::clicked, this, &CTryReg::reg_search);
    connect(ui->btnMatch, &QPushButton::clicked, this, &CTryReg::reg_match);
    connect(ui->btnIterator, &QPushButton::clicked, this, &CTryReg::reg_iterator);
    connect(ui->btnExit, &QPushButton::clicked, this, &CTryReg::close);
    connect(ui->btnOpenHis, &QPushButton::clicked, this, &CTryReg::open_his);

    QString home = QDir::homePath();
    QDir dir(home);
    his_path_ = dir.absoluteFilePath(".config/std_reg");
    QDir path(his_path_);
    if (!path.exists()) {
        path.mkpath(his_path_);
    }
    his_path_ = his_path_ + "/history.txt";
}

CTryReg::~CTryReg()
{
    delete ui;
}

void CTryReg::reg_search()
{
    ui->listWidget->clear();
    ui->edRet->clear();
    std::string pattern = ui->edReg->text().toStdString();
    std::string str = ui->plainTextEdit->toPlainText().toStdString();

    if (pattern.empty() || str.empty()) {
        return;
    }
    try {
        std::smatch match;
        std::regex rg(pattern);
        if (std::regex_search(str, match, rg)) {
            ui->edRet->setText("Success.");
            for (const auto& m : match) {
                ui->listWidget->addItem(QString::fromStdString(m.str()));
            }
        } else {
            ui->edRet->setText("Failed.");
        }
    } catch (const std::exception& e) {
        ui->edRet->setText(QString::fromStdString(e.what()));
    }
    append_his(QString::fromStdString(str), QString::fromStdString(pattern));
}

void CTryReg::reg_match()
{
    ui->listWidget->clear();
    ui->edRet->clear();
    std::string pattern = ui->edReg->text().toStdString();
    std::string str = ui->plainTextEdit->toPlainText().toStdString();

    if (pattern.empty() || str.empty()) {
        return;
    }
    try {
        std::regex rg(pattern);
        if (std::regex_match(str, rg)) {
            ui->edRet->setText("Success.");
        } else {
            ui->edRet->setText("Failed.");
        }
    } catch (const std::exception& e) {
        ui->edRet->setText(QString::fromStdString(e.what()));
    }
    append_his(QString::fromStdString(str), QString::fromStdString(pattern));
}

void CTryReg::reg_iterator()
{
    ui->listWidget->clear();
    ui->edRet->clear();
    std::string pattern = ui->edReg->text().toStdString();
    std::string str = ui->plainTextEdit->toPlainText().toStdString();

    if (pattern.empty() || str.empty()) {
        return;
    }
    try {
        std::regex rg(pattern);
        auto begin = std::sregex_iterator(str.begin(), str.end(), rg);
        auto end = std::sregex_iterator();
        if (begin != end) {
            ui->edRet->setText("Success.");
            while (begin != end) {
                for (const auto& item : *begin) {
                    ui->listWidget->addItem(QString::fromStdString(item.str()));
                }
                ++begin;
            }
        } else {
            ui->edRet->setText("Failed.");
        }
    } catch (const std::exception& e) {
        ui->edRet->setText(QString::fromStdString(e.what()));
    }
    append_his(QString::fromStdString(str), QString::fromStdString(pattern));
}

bool CTryReg::append_his(const QString& da, const QString& db)
{
    QFile file(his_path_);
    if (!file.open(QIODevice::ReadWrite | QIODevice::Text)) {
        return false;
    }

    QTextStream in(&file);
    QString content = in.readAll();

    QString search_pattern = "【字符串】\n" + da + "\n【表达式】\n" + db + "\n";
    if (content.contains(search_pattern)) {
        file.close();
        return true;
    }

    QTextStream out(&file);
    out.setDevice(&file);   // 重新设置输出流到文件末尾
    QString currentDateTime = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");
    out << currentDateTime << "\n";
    out << "【字符串】\n" << da << "\n";
    out << "【表达式】\n" << db << "\n\n";
    file.close();
    return true;
}

void CTryReg::open_his()
{
    if (!QFileInfo::exists(his_path_)) {
        QMessageBox::warning(nullptr, "错误", "文件不存在：" + his_path_);
        return;
    }

#ifdef Q_OS_WIN
    // Windows 系统使用 "notepad" 或者直接调用文件
    process.start("notepad", QStringList() << his_path_);
#elif defined(Q_OS_MAC)
    // macOS 系统使用 "open" 命令
    process.start("open", QStringList() << his_path_);
#else
    // Linux 或其他类 Unix 系统使用 "xdg-open"
    process.start("xdg-open", QStringList() << his_path_);
#endif
    // 检查是否启动成功
    if (!process.waitForStarted()) {
        QMessageBox::warning(nullptr, "错误", "无法启动系统编辑器！");
    }
}