#include "nmWxDisplaySettings.h"
#include <QDebug>
#include <QQueue>

#include "nmDataAnalyzeManager.h"
#include "nmGuiPlot.h"
#include "ZxObjBase.h"
#include <QString>

#include "ZxBaseUtil.h"

// --- CustomDisPlayTreeWidgetItem 实现 ---
CustomDisPlayTreeWidgetItem::CustomDisPlayTreeWidgetItem(QTreeWidget *pParent)
    : QTreeWidgetItem(pParent)
{
    m_pCheckBox = new QCheckBox();
    m_pCheckBox->setChecked(true); // 默认选中
    // 注意：这里不立即设置setItemWidget，因为treeWidget()可能返回nullptr
    // nmWxDisplaySettings的构造函数中会统一设置
}

CustomDisPlayTreeWidgetItem::CustomDisPlayTreeWidgetItem(QTreeWidgetItem *pParent)
    : QTreeWidgetItem(pParent)
{
    m_pCheckBox = new QCheckBox();
    m_pCheckBox->setChecked(true); // 默认选中
}

// --- CustomDisPlayTreeWidget 实现 ---
CustomDisPlayTreeWidget::CustomDisPlayTreeWidget(QWidget *pParent) : QTreeWidget(pParent)
{
    // 禁用交互功能，使树看起来是静态的
    setItemsExpandable(false); // 禁止用户展开/折叠节点
    // setAttribute(Qt::WA_TransparentForMouseEvents); // 移除此行，否则鼠标事件（如复选框点击）会失效
    setMouseTracking(true); // 启用鼠标跟踪，以便正确处理鼠标移动事件

    setSelectionMode(QAbstractItemView::NoSelection); // 禁止选择项
    setFocusPolicy(Qt::NoFocus); // 禁止获取焦点，避免虚线框
    setAllColumnsShowFocus(false); // 禁止显示焦点矩形
    // 隐藏滚动条
    //setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    // 视觉样式
    setStyleSheet(
        //"QTreeWidget {"
        //"    border: none;"
        //"    background: transparent;"
        //"}"
        //"QTreeWidget::item {"
        //"    background: transparent;"
        //"    border: none; /* 确保项没有边框 */"
        //"}"
        "QTreeWidget::item:hover {"
        "    background: transparent; /* 确保hover时背景不变 */"
        "}"
        "QTreeWidget::branch {"
        "    background: transparent; /* 隐藏默认分支线 */"
        "}"
    );

    // 初始化连接线缓存
    m_connectionLines.clear();

	connect(verticalScrollBar(), SIGNAL(valueChanged(int)), 
		this, SLOT(updateConnectionLines()));
}

// 更新根节点连接线位置
void CustomDisPlayTreeWidget::updateConnectionLines()
{
	m_connectionLines.clear();

	int rootCount = topLevelItemCount();
	if(rootCount <= 1) return;

	// 考虑滚动偏移量
	int scrollOffset = verticalScrollBar()->value();

	// 获取第一个根节点位置
	QTreeWidgetItem* firstRoot = topLevelItem(0);
	if(!firstRoot) return;
	QRect firstRect = visualItemRect(firstRoot);
	firstRect.translate(0, -scrollOffset); // 调整滚动偏移

	// 获取最后一个根节点位置
	QTreeWidgetItem* lastRoot = topLevelItem(rootCount - 1);
	if(!lastRoot) return;
	QRect lastRect = visualItemRect(lastRoot);
	lastRect.translate(0, -scrollOffset); // 调整滚动偏移

	const int baseOffset = 10;
	int lineStartX = lastRect.left() - baseOffset;

	// 计算连接线中点Y坐标
	int firstMidY = firstRect.center().y();
	int lastMidY = lastRect.center().y();

	// 保存连接线
	ConnectionLine line;
	line.start = QPoint(lineStartX, lastMidY);
	line.end = QPoint(lineStartX, firstMidY);
	m_connectionLines.append(line);
}

void CustomDisPlayTreeWidget::drawBranches(QPainter *pPainter, const QRect &rect, const QModelIndex &index) const
{
	QTreeWidgetItem *item = itemFromIndex(index);
	if(!item) return;

	int level = 0;
	for(QTreeWidgetItem *parent = item->parent(); parent; parent = parent->parent()) {
		level++;
	}

	pPainter->save();
	pPainter->setPen(QPen(Qt::black, 1.2, Qt::DotLine));

	const int baseOffset = 10;
	const int lineLength = 10;
	int lineY = rect.center().y();

	int dynamicOffset = baseOffset;
	if(level == 1) dynamicOffset += 20;
	else if(level == 2) dynamicOffset += 40;

	int lineStartX = rect.left() + dynamicOffset;
	int lineEndX = lineStartX + lineLength;

	// 1. 绘制水平线
	pPainter->drawLine(lineStartX, lineY, lineEndX, lineY);

	// 2. 绘制垂直线
	if(level > 0 && item->parent() != nullptr) {
		// 仅绘制到当前项范围的垂直线，不要延伸到整个高度
		int verticalLength = lineLength;
		int verticalStartY = lineY - verticalLength;
		int verticalEndY = lineY + verticalLength;

		// 当前节点在父节点中的索引
		int childIndex = item->parent()->indexOfChild(item);
		int childCount = item->parent()->childCount();

		// 绘制从当前节点到顶部的垂直线
		pPainter->drawLine(lineStartX, lineY, lineStartX, verticalStartY);

		// 如果不是最后一个子节点，则绘制向下的垂直线
		if (childIndex < childCount - 1) {
			pPainter->drawLine(lineStartX, lineY, lineStartX, verticalEndY);
		}
	}

	pPainter->restore();
}

// 重写绘制事件以绘制所有内容，包括QTreeWidget默认内容和我们的特殊连接线
void CustomDisPlayTreeWidget::paintEvent(QPaintEvent *pEvent)
{
    QTreeWidget::paintEvent(pEvent); // 先绘制原始树

    // 绘制缓存的连接线
    QPainter painter(viewport());
    painter.setPen(QPen(Qt::black, 1.2, Qt::DotLine));

    foreach(const ConnectionLine &line, m_connectionLines) {
        painter.drawLine(line.start, line.end);
    }
}

// --- nmWxDisplaySettings 类实现 ---
nmWxDisplaySettings::nmWxDisplaySettings(QWidget *pParent) : QDialog(pParent)
{
    setWindowTitle(tr("Display settings")); // 设置窗口标题
    resize(313, 416); // 设置窗口大小

    // 初始化UI组件
    m_pTreeWidget = new CustomDisPlayTreeWidget(this);
    m_pTreeWidget->resize(276, 299);
    m_pTreeWidget->setColumnCount(1); // 只有一列
    m_pTreeWidget->setHeaderHidden(true); // 隐藏表头

	// 刷新显示哪些图元
	nmDataAnalyzeManager::getCurrentInstance()->refreshChildItemsDisplay();

    // 获取保存的显示设置 - 现在使用QVector
    QVector<DisplaySetting> vecDisplaySettings = nmDataAnalyzeManager::getCurrentInstance()->getDisplaySettings();

    // 遍历显示设置并构建树
    for(int i = 0; i < vecDisplaySettings.size(); ++i) {
        const DisplaySetting& setting = vecDisplaySettings[i];
        const QString& categoryName = setting.key;
        const CategoryDisplayInfo& info = setting.value;

        // 创建父节点
        CustomDisPlayTreeWidgetItem *pParentItem = new CustomDisPlayTreeWidgetItem(m_pTreeWidget);
        m_pTreeWidget->setItemWidget(pParentItem, 0, pParentItem->checkBox());
        pParentItem->checkBox()->setText(categoryName);
        connect(pParentItem->checkBox(), SIGNAL(stateChanged(int)),
                this, SLOT(onCheckBoxStateChanged(int)));
        pParentItem->checkBox()->setChecked(info.isRootChecked);

        // 创建子节点
        for(int j = 0; j < info.childItems.size(); ++j) {
            const ChildCategoryDisplayInfo& childInfo = info.childItems[j];

            CustomDisPlayTreeWidgetItem *pChildItem = new CustomDisPlayTreeWidgetItem(pParentItem);
            QCheckBox* pChildCheckBox = pChildItem->checkBox();
            m_pTreeWidget->setItemWidget(pChildItem, 0, pChildCheckBox);
            pChildCheckBox->setText(childInfo.name);
            connect(pChildCheckBox, SIGNAL(stateChanged(int)),
                    this, SLOT(onCheckBoxStateChanged(int)));
            pChildCheckBox->setChecked(childInfo.isChecked);
            pChildCheckBox->setEnabled(childInfo.isEnabled);
        }

        // 更新子项的启用状态
        updateChildItemsEnableState(pParentItem, info.isRootChecked);
    }

    m_pTreeWidget->expandAll(); // 展开所有节点，实现静态树效果
    m_pTreeWidget->updateConnectionLines(); // 初始展开后立即更新连接线

    // --- 底部按钮 ---
    m_pImageManagerButton = new QPushButton(tr("Image manager"), this);
    m_pApplyButton = new QPushButton(tr("Apply"), this);
    m_pOkButton = new QPushButton(tr("OK"), this);
    m_pCancelButton = new QPushButton(tr("Cancel"), this);

    // 连接按钮的信号到槽
    connect(m_pImageManagerButton, SIGNAL(clicked()), this, SLOT(onImageManagerClicked()));
    connect(m_pApplyButton, SIGNAL(clicked()), this, SLOT(onApplyClicked()));
    connect(m_pOkButton, SIGNAL(clicked()), this, SLOT(onOkClicked()));
    connect(m_pCancelButton, SIGNAL(clicked()), this, SLOT(onCancelClicked()));

    // --- 布局设置 ---
    // 声明pButtonsVerticalLayout变量
    QVBoxLayout *pButtonsVerticalLayout = new QVBoxLayout();
    pButtonsVerticalLayout->setContentsMargins(0, 0, 0, 0); // 移除额外边距，让按钮紧凑

    // 为 Image Manager 按钮创建单独的水平布局
    QHBoxLayout *pImageManagerLayout = new QHBoxLayout();
    //pImageManagerLayout->addStretch(); // 左侧伸缩空间，将按钮推向右侧
    pImageManagerLayout->addWidget(m_pImageManagerButton);
    // pImageManagerLayout->addStretch(); // 右侧伸缩空间，将按钮推向左侧，实现居中
    pImageManagerLayout->setContentsMargins(0, 0, 0, 0); // 移除额外边距

    // 为 Apply, OK, Cancel 按钮创建另一个水平布局
    QHBoxLayout* pButtonLayout = new QHBoxLayout();
    //pButtonLayout->addStretch(); // 左侧留白，推向右侧
    pButtonLayout->addWidget(m_pApplyButton);
    pButtonLayout->addWidget(m_pOkButton);
    pButtonLayout->addWidget(m_pCancelButton);
    //pButtonLayout->addStretch(); // 右侧留白，推向左侧
    pButtonLayout->setContentsMargins(0, 0, 0, 0); // 移除额外边距

    // 将两个水平按钮布局添加到垂直按钮布局中
    pButtonsVerticalLayout->addLayout(pImageManagerLayout);
    pButtonsVerticalLayout->addLayout(pButtonLayout);

    // 设置主垂直布局
    m_pMainLayout = new QVBoxLayout(this);
    m_pMainLayout->addWidget(m_pTreeWidget);
    // 在树控件和按钮之间添加伸缩空间，确保树控件占据大部分垂直空间
    //m_pMainLayout->addStretch();
    // 将包含所有按钮的垂直布局添加到主布局的底部
    m_pMainLayout->addLayout(pButtonsVerticalLayout);

    // 设置对话框的布局
    setLayout(m_pMainLayout);
}

nmWxDisplaySettings::~nmWxDisplaySettings()
{
}

void nmWxDisplaySettings::onCheckBoxStateChanged(int state)
{
    QCheckBox *pCheckBox = qobject_cast<QCheckBox*>(sender());

    if(!pCheckBox) return;

    // 查找与触发信号的复选框关联的QTreeWidgetItem
    QTreeWidgetItem *pChangedItem = nullptr;
    // 使用BFS（广度优先搜索）或DFS（深度优先搜索）来查找项是可靠的方法
    // 这里使用BFS
    QQueue<QTreeWidgetItem*> itemsToProcess;

    // 将所有顶层项添加到队列
    for(int i = 0; i < m_pTreeWidget->topLevelItemCount(); ++i) {
        itemsToProcess.enqueue(m_pTreeWidget->topLevelItem(i));
    }

    while(!itemsToProcess.isEmpty()) {
        QTreeWidgetItem *pCurrentItem = itemsToProcess.dequeue();

        // 检查当前项是否包含触发信号的复选框
        if(m_pTreeWidget->itemWidget(pCurrentItem, 0) == pCheckBox) {
            pChangedItem = pCurrentItem;
            break; // 找到对应的项，退出循环
        }

        // 将当前项的所有子项添加到队列
        for(int i = 0; i < pCurrentItem->childCount(); ++i) {
            itemsToProcess.enqueue(pCurrentItem->child(i));
        }
    }

    if(pChangedItem) {
        // 更新子项的启用状态
        updateChildItemsEnableState(pChangedItem, state != Qt::Unchecked);
    }
}

void nmWxDisplaySettings::updateChildItemsEnableState(QTreeWidgetItem *pItem, bool bEnabled)
{
    // 递归遍历子项，设置复选框的启用状态
    for(int i = 0; i < pItem->childCount(); ++i) {
        QTreeWidgetItem *pChild = pItem->child(i);

        // 动态转换确保是我们的CustomDisPlayTreeWidgetItem类型
        if(CustomDisPlayTreeWidgetItem *pCustomDisPlayChild = dynamic_cast<CustomDisPlayTreeWidgetItem * >(pChild)) {
            pCustomDisPlayChild->checkBox()->setEnabled(bEnabled);
            // 递归调用，处理更深层级的子项
            updateChildItemsEnableState(pChild, bEnabled);
        }
    }
}

void nmWxDisplaySettings::onImageManagerClicked()
{
    qDebug("Image Manager button clicked!");
    // 这里可以打开一个新的对话框或执行其他逻辑
}

void nmWxDisplaySettings::onApplyClicked()
{
    // 存储更新后的显示设置
    QVector<DisplaySetting> vecUpdatedSettings;

    // 遍历所有顶层项
    for(int i = 0; i < m_pTreeWidget->topLevelItemCount(); ++i) {
        CustomDisPlayTreeWidgetItem* pTopItem =
            dynamic_cast<CustomDisPlayTreeWidgetItem*>(m_pTreeWidget->topLevelItem(i));

        if(pTopItem) {
            DisplaySetting setting;
            setting.key = pTopItem->checkBox()->text();
            setting.value.isRootChecked = pTopItem->checkBox()->isChecked();

            // 收集子项信息
            for(int j = 0; j < pTopItem->childCount(); ++j) {
                CustomDisPlayTreeWidgetItem* pChildItem =
                    dynamic_cast<CustomDisPlayTreeWidgetItem*>(pTopItem->child(j));

                if(pChildItem) {
                    QCheckBox* pChildCheckBox = pChildItem->checkBox();
                    ChildCategoryDisplayInfo childInfo;
                    childInfo.name = pChildCheckBox->text();
                    childInfo.isChecked = pChildCheckBox->isChecked();
                    childInfo.isEnabled = pChildCheckBox->isEnabled();

                    setting.value.childItems.append(childInfo);
                }
            }

            vecUpdatedSettings.append(setting);
        }
    }

    // 更新数据中心的显示设置
    nmDataAnalyzeManager::getCurrentInstance()->setDisplaySettings(vecUpdatedSettings);

    // 更新绘图
    nmGuiPlot* pPlot = nmDataAnalyzeManager::getCurrentInstance()->getPlot();

    if(pPlot) {
        // 遍历更新后的设置并应用到绘图
		for (int i = 0; i < vecUpdatedSettings.size(); ++i) {
			const DisplaySetting& setting = vecUpdatedSettings.at(i);
			QString sCategoryKey = setting.key;
			CategoryDisplayInfo categoryInfo = setting.value;
			bool isRootChecked = categoryInfo.isRootChecked; // 整体是否选中

			if (categoryInfo.childItems.size() == 0 || isRootChecked == false)	{ // 无子节点，或者父节点为未选中状态
				// 判断类别
				if (_isSame(sCategoryKey,tr("Contour")))	{
					pPlot->setContourVisibility(isRootChecked);
				} else if (_isSame(sCategoryKey,tr("Images")))	{
					pPlot->setImagesVisibility(isRootChecked);
				} else if (_isSame(sCategoryKey,tr("Faults")))	{
					pPlot->setAllFaultsVisible(isRootChecked);
				} else if (_isSame(sCategoryKey,tr("Wells")))	{
					pPlot->setAllWellsVisible(isRootChecked);
				} else if (_isSame(sCategoryKey,tr("Fractures")))	{
					pPlot->setAllFracturesVisible(isRootChecked);
				} else if (_isSame(sCategoryKey,tr("Regions")))	{
					pPlot->setAllRegionsVisible(isRootChecked);
				} else if (_isSame(sCategoryKey,tr("RegionMarks")))	{
					pPlot->setAllRegionMarksVisible(isRootChecked);
				}
			} else { // 包含子节点，并且父节点处于选中状态

				// 遍历子节点（使用QVector的迭代器）
				QVector<ChildCategoryDisplayInfo>::const_iterator childIt;
				for (childIt = categoryInfo.childItems.constBegin(); 
					childIt != categoryInfo.childItems.constEnd(); 
					++childIt) {
						const ChildCategoryDisplayInfo& child = *childIt;
						// 判断类别
						if (_isSame(sCategoryKey,tr("Faults")))	{
							pPlot->setFaultVisible(child.name, child.isChecked);
						} else if (_isSame(sCategoryKey,tr("Wells")))	{
							pPlot->setWellVisible(child.name, child.isChecked);
						} else if (_isSame(sCategoryKey,tr("Fractures")))	{
							pPlot->setFractureVisible(child.name, child.isChecked);
						} else if (_isSame(sCategoryKey,tr("Regions")))	{
							pPlot->setRegionVisible(child.name, child.isChecked);
						} else if (_isSame(sCategoryKey,tr("RegionMarks")))	{
							pPlot->setRegionMarkVisible(child.name, child.isChecked);
						}
				}
			}
		}

        pPlot->update();
    }
}

void nmWxDisplaySettings::onOkClicked()
{
    // 应用当前设置并关闭对话框
    onApplyClicked();
    accept();
}

void nmWxDisplaySettings::onCancelClicked()
{
    // 放弃当前设置并关闭对话框
    reject();
}