#ifndef SINGLERELAY_H
#define SINGLERELAY_H

#include <QDialog>
#include <QTextEdit>
#include <QButtonGroup>
#include <QPushButton>
#include "data_config.h"
#include "config_mgr.h"
#include "singlerelay_data.h"

namespace Ui {
class SingleRelay;
}

class DropTextEdit : public QTextEdit {
    Q_OBJECT
public:
    DropTextEdit(QWidget *parent = nullptr) : QTextEdit(parent) {
        setAcceptDrops(true);
    }
public slots:
    void removeLastElement() {
        QString html = this->toHtml();

        // 匹配 <span>元素</span>
        QRegularExpression spanRe(R"(<span[^>]*>[^<]*</span>)");
        QRegularExpressionMatchIterator spanIt = spanRe.globalMatch(html);

        // 匹配符号元素（注意符号两边可能有空格）
        QRegularExpression symbolRe(R"((\s?[+*()]\s?))");
        QRegularExpressionMatchIterator symbolIt = symbolRe.globalMatch(html);

        // 保存所有匹配结果：位置 + 匹配内容
        struct Match {
            int start;
            int length;
        };
        QList<Match> matches;

        while (spanIt.hasNext()) {
            auto m = spanIt.next();
            matches.append({ m.capturedStart(), m.capturedLength() });
        }

        while (symbolIt.hasNext()) {
            auto m = symbolIt.next();
            matches.append({ m.capturedStart(), m.capturedLength() });
        }

        if (matches.isEmpty())
            return;

        // 找出最后出现的元素
        std::sort(matches.begin(), matches.end(), [](const Match &a, const Match &b) {
            return a.start < b.start;
        });

        // 删除最后一个匹配
        Match last = matches.last();
        html.remove(last.start, last.length);
        this->setHtml(html);

        // 保持光标在末尾
        QTextCursor cursor = this->textCursor();
        cursor.movePosition(QTextCursor::End);
        this->setTextCursor(cursor);
    }
protected:
    void dragEnterEvent(QDragEnterEvent *event) override {
        if (event->mimeData()->hasFormat("application/x-custom")) {
            event->acceptProposedAction();
        } else {
            event->ignore();
        }
    }

    void dragMoveEvent(QDragMoveEvent *event) override {
        if (event->mimeData()->hasFormat("application/x-custom")) {
            event->acceptProposedAction();
        } else {
            event->ignore();
        }
    }

    void dropEvent(QDropEvent *event) override {
        if (!this->toPlainText().isEmpty()) {
                event->ignore();
                return;
            }
        if (event->mimeData()->hasFormat("application/x-custom")) {
            QByteArray data = event->mimeData()->data("application/x-custom");
            QString text = QString::fromUtf8(data);

            QTextCursor cursor = this->textCursor();
            this->setTextCursor(cursor);

            QString html = QString(
                "<span style='"
                "background:#ddd;"
                "padding:2px 6px;"
                "border-radius:4px;"
                "border:1px solid #aaa;"
                "outline: none;"
                "box-shadow: none;"
                "text-shadow: none;"
                "display:inline-block;'>%1</span>"
            ).arg(text);
            cursor.insertHtml(html);
            event->acceptProposedAction();
        } else {
            event->ignore();
        }
    }
};
class SingleRelay : public QDialog {
    Q_OBJECT

  public:
    explicit SingleRelay(int slot,int cardtype,QWidget *parent = nullptr);
    ~SingleRelay();
    int slot_no;
    CardType car_type;
  private slots:
    void keyPressEvent(QKeyEvent *event);
    void on_pushButton_cancel_clicked();
    void OnButtonGroup(QAbstractButton *);

    void on_pushButton_enter_clicked();

    void on_pushButton_backspace_clicked();

    void on_pushButton_clr_clicked();

    void on_pushButton_confirm_clicked();

    void onComboBoxIndexChanged(int index);

private:
    Ui::SingleRelay *ui;
    QButtonGroup * btnGroup_slot = nullptr;
    DraggableListWidget *list_widget_available = nullptr;
    DropTextEdit *textEdit_relay = nullptr;
    std::shared_ptr<SingleRelayDataNOK> single_relay_nok_data = nullptr;
    int current_index;
    void Init();
};

#endif // SINGLERELAY_H