#include "src/mainwindow/mainwindow.h"
#include "ElaApplication.h"
#include "src/utils/configmanager.h"
#include <QApplication>
#include <QIcon>
#include <QCoreApplication>
#include <QEvent>
#include <QKeyEvent>
#include <QClipboard>
#include <QKeySequence>
#include <QLabel>
#include <QAbstractItemView>
#include <QModelIndex>
#include <algorithm>

// 全局文字可复制过滤器：
// 1) 所有 QLabel（含 ElaText）文字可用鼠标选中并复制；
// 2) 表格/树（QAbstractItemView）选中的单元格支持 Ctrl+C 复制，制表符分隔列、换行分隔行。
class TextSelectableFilter : public QObject
{
public:
    using QObject::QObject;

protected:
    bool eventFilter(QObject *watched, QEvent *event) override
    {
        if (event->type() == QEvent::Polish) {
            if (QLabel *label = qobject_cast<QLabel *>(watched)) {
                // 跳过用作图标按钮的 QLabel（有 pixmap 无文本），
                // 否则会被强制设为竖线（IBeamCursor），影响点击类图标控件
                if (label->pixmap().isNull()) {
                    label->setTextInteractionFlags(label->textInteractionFlags()
                                                   | Qt::TextSelectableByMouse);
                    label->setCursor(Qt::IBeamCursor);
                }
            }
        } else if (event->type() == QEvent::KeyPress) {
            if (auto *view = qobject_cast<QAbstractItemView *>(watched)) {
                auto *ke = static_cast<QKeyEvent *>(event);
                if (ke->matches(QKeySequence::Copy)) {
                    return copySelectedCells(view);
                }
            }
        }
        return QObject::eventFilter(watched, event);
    }

private:
    static bool copySelectedCells(QAbstractItemView *view)
    {
        if (!view->selectionModel()) {
            return false;
        }
        QModelIndexList idxs = view->selectionModel()->selectedIndexes();
        if (idxs.isEmpty()) {
            return false;
        }
        // 按行、列排序，保证复制顺序与显示一致
        std::sort(idxs.begin(), idxs.end(),
                  [](const QModelIndex &a, const QModelIndex &b) {
                      if (a.row() != b.row()) {
                          return a.row() < b.row();
                      }
                      return a.column() < b.column();
                  });

        QString text;
        int lastRow = -1;
        for (const QModelIndex &idx : idxs) {
            if (idx.row() != lastRow) {
                if (lastRow != -1) {
                    text += QLatin1Char('\n');
                }
                lastRow = idx.row();
            } else {
                text += QLatin1Char('\t');
            }
            text += idx.data(Qt::DisplayRole).toString();
        }
        if (!text.isEmpty()) {
            QApplication::clipboard()->setText(text);
            return true; // 已处理，消费该事件
        }
        return false;
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    a.setWindowIcon(QIcon(":resources/images/ChangeCode.png"));

    // 安装全局过滤器：所有页面文字 / 表格树单元格允许用户复制
    TextSelectableFilter textSelectableFilter;
    a.installEventFilter(&textSelectableFilter);

    eApp->init();
    
    QString basePath = QCoreApplication::applicationDirPath();
    ConfigManager::instance()->loadConfig(basePath);
    
    MainWindow w;
    w.showMaximized();
    return a.exec();
}