#include "NuclideLib.h"
#include "ui_NuclideLib.h"
#include "sqlitemanager.h"
#include <QMessageBox>
#include <QHeaderView>
#include <QPainter>
#include <QStyleOptionButton>
#include <QMouseEvent>
#include <QApplication>

ButtonDelegate::ButtonDelegate(QObject *parent) : QStyledItemDelegate(parent) {}

void ButtonDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    if (index.column() == 7) {
        QStyleOptionButton button;
        button.rect = option.rect;
        button.text = "核素发射射线信息";
        button.state = QStyle::State_Enabled;
        if (option.state & QStyle::State_MouseOver)
            button.state |= QStyle::State_MouseOver;
        QApplication::style()->drawControl(QStyle::CE_PushButton, &button, painter);
    } else {
        QStyledItemDelegate::paint(painter, option, index);
    }
}

bool ButtonDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
{
    if (index.column() == 7 && event->type() == QEvent::MouseButtonRelease) {
        QMouseEvent *mouseEvent = static_cast<QMouseEvent*>(event);
        QRect buttonRect = option.rect;
        if (buttonRect.contains(mouseEvent->pos())) {
            emit buttonClicked(index);
            return true;
        }
    }
    return QStyledItemDelegate::editorEvent(event, model, option, index);
}

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

    m_model = new QStandardItemModel(0, 8, this);
    m_model->setHorizontalHeaderLabels({"ID", "序号", "核素名称", "半衰期", "半衰期不确定度", "母体核素名称", "子体核素名称", "操作"});
    ui->tableView->setModel(m_model);

    ui->tableView->setColumnHidden(0, true);

    ui->tableView->setColumnWidth(1, 90);   // 序号
    ui->tableView->setColumnWidth(7, 280);  // 操作列
    ui->tableView->horizontalHeader()->setSectionResizeMode(2, QHeaderView::Stretch);
    ui->tableView->horizontalHeader()->setSectionResizeMode(3, QHeaderView::Stretch);
    ui->tableView->horizontalHeader()->setSectionResizeMode(4, QHeaderView::Stretch);
    ui->tableView->horizontalHeader()->setSectionResizeMode(5, QHeaderView::Stretch);
    ui->tableView->horizontalHeader()->setSectionResizeMode(6, QHeaderView::Stretch);

    ui->tableView->setAlternatingRowColors(true);
    ui->tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
    ui->tableView->setFocusPolicy(Qt::NoFocus);

    // 设置委托
    m_delegate = new ButtonDelegate(this);
    ui->tableView->setItemDelegateForColumn(7, m_delegate);
    connect(m_delegate, &ButtonDelegate::buttonClicked, this, &NuclideLibManage::onButtonClicked);
}

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

void NuclideLibManage::loadNuclideData()
{
    QString sql = "SELECT ID, NAME, HALF_LIFE, HALF_LIFE_UNC, PARENT_NUCLIDE, CHILD_NUCLIDE FROM tbl_nuclide_library;";
    auto rows = SqliteManager::instance().selectRows(sql);
    m_listNuclide.clear();
    m_model->setRowCount(0);

    int row = 0;
    for (const auto& rec : rows) {
        QStringList item;
        item << rec["ID"].toString()
             << rec["NAME"].toString()
             << rec["HALF_LIFE"].toString()
             << rec["HALF_LIFE_UNC"].toString()
             << rec["PARENT_NUCLIDE"].toString()
             << rec["CHILD_NUCLIDE"].toString();
        m_listNuclide.append(item);

        // 插入模型行
        QList<QStandardItem*> rowItems;
        // 第0列：ID（隐藏）
        QStandardItem *idItem = new QStandardItem(item[0]);
        idItem->setTextAlignment(Qt::AlignCenter);
        idItem->setFlags(idItem->flags() & ~Qt::ItemIsEditable);
        rowItems << idItem;

        // 第1列：序号（行号+1）
        QStandardItem *seqItem = new QStandardItem(QString::number(row + 1));
        seqItem->setTextAlignment(Qt::AlignCenter);
        seqItem->setFlags(seqItem->flags() & ~Qt::ItemIsEditable);
        rowItems << seqItem;

        // 第2~6列：核素名称、半衰期等
        for (int col = 1; col <= 5; ++col) { // item的下标1~5对应NAME到CHILD_NUCLIDE
            QStandardItem *dataItem = new QStandardItem(item[col]);
            dataItem->setTextAlignment(Qt::AlignCenter);
            dataItem->setFlags(dataItem->flags() & ~Qt::ItemIsEditable);
            rowItems << dataItem;
        }

        // 第7列：操作列（存储空字符串，委托负责绘制按钮）
        QStandardItem *opItem = new QStandardItem("");
        opItem->setFlags(opItem->flags() & ~Qt::ItemIsEditable);
        rowItems << opItem;

        m_model->appendRow(rowItems);
        ++row;
    }
}

QStringList NuclideLibManage::getNuclideData(const QString &id)
{
    for (const auto& item : m_listNuclide) {
        if (item.at(0) == id)
            return item;
    }
    return QStringList();
}

void NuclideLibManage::on_pushButton_add_clicked()
{
    loadNuclideData();   // 刷新数据
}

void NuclideLibManage::on_pushButton_edit_clicked()
{
    QModelIndexList selected = ui->tableView->selectionModel()->selectedRows();
    if (selected.isEmpty()) {
        QMessageBox::information(this, "提示", "请先选择要修改的核素行！");
        return;
    }
    int row = selected.first().row();
    QString id = m_model->index(row, 0).data().toString(); // 隐藏的ID列
    QStringList data = getNuclideData(id);
    if (data.isEmpty()) return;
}

void NuclideLibManage::on_pushButton_del_clicked()
{
    QModelIndexList selected = ui->tableView->selectionModel()->selectedRows();
    if (selected.isEmpty()) {
        QMessageBox::information(this, "提示", "请先选择要删除的核素行！");
        return;
    }
    int row = selected.first().row();
    QString id = m_model->index(row, 0).data().toString();

    QMessageBox box(QMessageBox::Question, "提示", "确定删除该核素吗？",
                    QMessageBox::Yes | QMessageBox::No, this);
    box.button(QMessageBox::Yes)->setText("确认");
    box.button(QMessageBox::No)->setText("取消");
    if (box.exec() != QMessageBox::Yes) return;

    bool ok = SqliteManager::instance().deleteRow("tbl_nuclide_library", "ID = ?", {id});
    if (ok) {
        loadNuclideData();
    } else {
        QMessageBox::warning(this, "错误", "删除失败：" + SqliteManager::instance().lastError());
    }
}

void NuclideLibManage::onButtonClicked(const QModelIndex &index)
{
    int row = index.row();
    QString nuclideId = m_model->index(row, 0).data().toString();
}