#include "VPieChart.h"
#include <qmath.h>
#include "GvlManager.h"


// 默认的分块数
#define DEFAULT_PEICHART_SLICE_COUNT            3

VPieChart::VPieChart(
    QWidget *parent, 
	const QPoint& pos,
	const QSize& size,
    CONTROL_PROPERTY* pProperty,
    CONTROL_PROPERTY_EX* pPropertyEx
)
    : QWidget(parent)
    , VControlObject(pProperty)
{
    // 设置控件指针
	m_pWidget = this;

    // 设置控件类型
	m_Type = VALUE_TYPE::Control_PieChart;

	// 初始化UI风格
	this->initStyle();

	// 设置尺寸
	if (size == DEFAULT_CONTROL_SIZE)
	{
		this->resize(DEFAULT_PIE_SIZE);
	}
	else
	{
		this->resize(size);
	}

	// 设置中心点坐标
	QPoint tempPos;
	tempPos.setX(pos.x() - width() / 2);
	tempPos.setY(pos.y() - height() / 2);

	// 设置位置
	this->move(tempPos);

	// 初始化扩展属性
	if (pPropertyEx == nullptr)
	{
		// 初始化饼图的分块数
        this->m_Property.m_nSliceCount = DEFAULT_PEICHART_SLICE_COUNT;
        
        // 初始化扩展属性
        this->initPropertyEx();

        // 重新绘制预览饼图
        this->update();
	}
	else
	{
		this->m_PropertyEx = *pPropertyEx;

        // 根据分块数量先设置一个默认显示的Value
		for (int i = 0; i < m_Property.m_nSliceCount; i++)
		{
			// 初始化一下Value的预览数值（全为1）
			m_Values << 1.0;
		}

        // 重新绘制预览饼图
		this->update();
	}
}

VPieChart::~VPieChart()
{
}

void VPieChart::paintEvent(QPaintEvent *)
{
    int width = this->width();
    int height = this->height();
    int side = qMin(width, height);

    //绘制准备工作,启用反锯齿,平移坐标轴中心,等比例缩放
    QPainter painter(this);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
    painter.translate(width / 2, height / 2);
    painter.scale(side / 200.0, side / 200.0);

    //绘制饼图
    drawPie(&painter);
}


/// <summary>
/// 初始化UI风格
/// </summary>
void VPieChart::initStyle()
{
	explodedIndex = -1;
	explodedAll = false;

	showPercent = false;
	holeSize = 0.0;

	// 设置基础属性
	this->setTextColor(m_Property.m_clrText);
	this->setBorderColor(m_Property.m_clrBorder);

	// 备用颜色集合（按分块顺序赋值）
	m_defaultColors << QColor(0, 176, 180)
		<< QColor(255, 192, 0)
		<< QColor(0, 113, 193)
		<< QColor(72, 103, 149)
		<< QColor(185, 87, 86)
		<< QColor(0, 177, 125)
		<< QColor(214, 77, 84)
		<< QColor(71, 164, 233)
		<< QColor(34, 163, 169)
		<< QColor(40, 45, 48)
		<< QColor(162, 121, 197)
		<< QColor(72, 202, 245)
		<< QColor(0, 150, 121)
		<< QColor(111, 9, 176)
		<< QColor(250, 170, 20);
}


/// <summary>
/// 核心函数：绘制饼图
/// </summary>
/// <param name="painter"></param>
void VPieChart::drawPie(QPainter *painter)
{
    painter->save();

    int radius = 93;
    QRect rect(-radius, -radius, radius * 2, radius * 2);

    double startAngle = 0;
    double sum = getSumValue();

    //逐个取出值并绘制饼图区域和对应的文字
    int count = this->m_Property.m_nSliceCount;
    for (int i = 0; i < count; ++i) 
    {
        // 取出当前属性值用于绘制
        const PROPERTY_EX_SUBGROUP& subGroup = m_PropertyEx.m_groups[GROUP_INDEX_PIE].subGroups[i];

        //取出值并计算当前值占比面积
        double value = m_Values.at(i);
        double arcLength = value / sum * 360;
        double percent = value / sum * 100;
        QRect pieRect = rect;

        //如果当前区域展开则需要设置边框
        painter->setPen(Qt::NoPen);
        if (explodedIndex == i || explodedAll) 
        {
            painter->setPen(m_BorderColor);
            QPoint center = pieRect.center();
            int mid = startAngle + arcLength / 2;
            center += getOffsetPoint(mid);
            pieRect.moveCenter(center);
        }

        // 从颜色集合中取出颜色（按照索引顺序依次获取）
        painter->setBrush(subGroup.color);
        painter->drawPie(pieRect, startAngle * 16, arcLength * 16);

        QString strValue = subGroup.strValue;
        if (showPercent && percent > 7) 
        {
            strValue = QString("%1%2%3%").arg(strValue).arg(strValue.isEmpty() ? "" : "\n").arg(QString::number(percent, 'f', 0));
        }

        int mid = startAngle + arcLength / 2;
        int offset = 60;
        if (percent >= 50) 
        {
            offset = 45;
        } 
        else if (percent >= 30) 
        {
            offset = 55;
        } 
        else if (percent >= 15) 
        {
            offset = 60;
        }

        QPoint p = getOffsetPoint(mid, offset);
        QRect textRect;
        textRect.setX(p.x() - 40);
        textRect.setY(p.y() - 30);
        textRect.setWidth(80);
        textRect.setHeight(60);
        painter->setPen(Qt::black);
        //painter->drawRect(textRect);

        // 设置字体
        QFont font;
        font.setPixelSize(strValue.isEmpty() ? 20 : 17);
        painter->setFont(font);

        // 绘制文字
        painter->setPen(m_TextColor);
        painter->drawText(textRect, Qt::AlignCenter, strValue);

        // 递增角度
        startAngle += arcLength;
    }

    painter->restore();
}


/// <summary>
/// 初始化扩展属性
/// </summary>
void VPieChart::initPropertyEx()
{
	// 扩展属性的总名称
	m_PropertyEx.m_strTitle = PIE_PROPERTY_EX_NAME;

	// 用于触发刷新的数据链接
	m_PropertyEx.m_refreshLink.title = PIE_PROPERTY_EX_REFRESHLINK_NAME;
	// 强制设置
	m_PropertyEx.m_refreshLink.bForce = true;

	//// 默认值（暂不使用）
	//m_PropertyEx.m_refreshLink.defaultValue = new VARIABLE("",
	//	false, m_PropertyEx.m_refreshLink.title, "int", DEFAULT_DATALINK_VALUE_0, "");

	// 初始化每一个扩展属性组（Pie控件只有一个属性组）

	PROPERTY_EX_GROUP group;

	// 列信息属性
	group.strTitle = PIE_PROPERTY_EX_GROUP_NAME;
	group.strRelationKey = PIE_SLICE_COUNT_NAME;

	//初始化列信息每一个子分组
	for (int i = 0; i < m_Property.m_nSliceCount; i++)
	{
		PROPERTY_EX_SUBGROUP subGroup;

		this->initSubGroup(subGroup, i, GROUP_INDEX_PIE);

		// 保存子分组
		group.subGroups.push_back(subGroup);

		// 顺便初始化一下Value的预览数值（全为1）
        m_Values << 1.0;
	}

	// 保存本子分组定义信息
	m_PropertyEx.m_groups.push_back(group);

	//// 2022-9-11 为刷新链接绑定默认值（系统的执行次数）
	//this->bindDefaultRefreshDataLink();
}



/// <summary>
/// 初始化一个扩展属性组
/// </summary>
/// <param name="subItem"></param>
void VPieChart::initSubGroup(PROPERTY_EX_SUBGROUP& subGroup, int nIndex, int nSubGroupID)
{
	if (nSubGroupID == GROUP_INDEX_PIE)
	{
		QString idx = QString::number(nIndex + 1);

		// 子分组名称
		subGroup.strTitle = PIE_PROPERTY_EX_SUBGROUP_NAME + idx;

		// 列名称 + 数值
		subGroup.strValueName = PIE_PROPERTY_EX_VALUE_NAME + idx;
		subGroup.strValue = PIE_PROPERTY_EX_VALUE_NAME + idx;

		// 分块颜色名称 + 数值
		subGroup.strColorName = PIE_PROPERTY_EX_COLOR_NAME + idx;
		// 按顺序给一个默认值（可能会越界）
		if (nIndex < m_defaultColors.size())
		{
			subGroup.color = m_defaultColors.at(nIndex);
		}
		else
		{
			subGroup.color = m_defaultColors.at(nIndex - m_defaultColors.size());
		}

		// 数据链接名称
		DataLink dataLink;
		dataLink.title = PIE_PROPERTY_EX_LINK_NAME + idx;
		dataLink.defaultValue = g_pGvlManager->getDefaultValueByName(DEFAULT_VALUE_NULLSTRING);

		subGroup.dataLinks.push_back(dataLink);
	}
}




/// <summary>
/// 获取文字颜色
/// </summary>
/// <returns></returns>
QColor VPieChart::getTextColor() const
{
    return this->m_TextColor;
}


/// <summary>
/// 获取边界颜色
/// </summary>
/// <returns></returns>
QColor VPieChart::getBorderColor() const
{
    return this->m_BorderColor;
}


/// <summary>
/// 设置块数
/// </summary>
/// <param name="count"></param>
void VPieChart::setSliceCount(const int& count)
{
    if (this->m_Property.m_nSliceCount != count)
    {
        this->m_Property.m_nSliceCount = count;

        this->update();
    }
}


/// <summary>
/// 获取当前块数
/// </summary>
int VPieChart::getSliceCount()
{
    return this->m_Property.m_nSliceCount;
}


/// <summary>
/// 设置分块文字
/// </summary>
/// <param name="newValue"></param>
/// <param name="nIndex"></param>
void VPieChart::updateSliceTitle(const QString& newValue, const int nIndex)
{
	// 更新分块文字
	QString& strValue = m_PropertyEx.m_groups[GROUP_INDEX_PIE].subGroups[nIndex].strValue;

	if (strValue != newValue)
	{
		strValue = newValue;

		this->update();
	}

	qDebug() << "VPieChart::updateColTitle - update ["
		<< m_PropertyEx.m_groups[GROUP_INDEX_PIE].subGroups[nIndex].strValueName << "] to [" << newValue << "]";

}


/// <summary>
/// 设置分块颜色
/// </summary>
/// <param name="newValue"></param>
/// <param name="nIndex"></param>
void VPieChart::updateSliceColor(QColor newValue, const int nIndex)
{
	QColor& color = m_PropertyEx.m_groups[GROUP_INDEX_PIE].subGroups[nIndex].color;

	if (color != newValue)
	{
		color = newValue;

		this->update();
	}

	qDebug() << "VPieChart::updateSliceColor - update ["
		<< m_PropertyEx.m_groups[GROUP_INDEX_PIE].subGroups[nIndex].strColorName
		<< "] to [" << newValue << "]";

}


/// <summary>
/// 设置分块数值
/// </summary>
/// <param name="newValue"></param>
/// <param name="nIndex"></param>
void VPieChart::updateSliceValue(const int& newValue, const int nIndex)
{
	if (newValue != m_Values[nIndex])
	{
		m_Values[nIndex] = newValue;

		this->update();
	}

	qDebug() << "VPieChart::updateSliceValue - update m_Values["
		<< nIndex << "] to [" << newValue << "]";
}


/// <summary>
/// 调整块属性数量（虚函数）
/// </summary>
/// <param name="fixCount"></param>
void VPieChart::updateExPropertyCount(const int fixCount, const QString& strPropName)
{
	// 获取属性的当前数量
	int curCount = this->getExPropertyCountByName(strPropName);
	// 子分组编号
	int curGroup = this->getGroupIDByName(strPropName);

	// 检查有效性
	if (curGroup < 0)
	{
		qDebug() << "[Error] VTableControl::updateExPropertyCount - nGroupID in invalid: " << curGroup;

		return;
	}

	// 如果需要增加
	if (fixCount > 0)
	{
		int nEnd = curCount + fixCount;

		for (int i = curCount; i < nEnd; i++)
		{
			PROPERTY_EX_SUBGROUP subItem;

			this->initSubGroup(subItem, i, curGroup);

			m_PropertyEx.m_groups[curGroup].subGroups.push_back(subItem);

			// 2022-1-5 顺便初始化一下Value的预览数值（全为1）
			m_Values << 1.0;

		}
	}

	// 如果需要减少
	else if (fixCount < 0)
	{
		for (int i = 0; i < qAbs(fixCount); i++)
		{
			// 去掉对应的数据结构信息
			m_PropertyEx.m_groups[curGroup].subGroups.pop_back();

			// 同时去掉预览数值
            m_Values.pop_back();
		}
	}
}


/// <summary>
/// 修改扩展属性（虚函数）
/// </summary>
/// <param name="strValueTile"></param>
/// <param name="newValue"></param>
void VPieChart::changeExProperties(QString strValueTitle, const QVariant& newValue)
{
    // 如果改变了分块标题
	if (strValueTitle.contains(PIE_PROPERTY_EX_VALUE_NAME))
	{
		// 获取修改属性的索引
		int nIndex = strValueTitle.remove(PIE_PROPERTY_EX_VALUE_NAME).toInt() - 1;
			
		// 如果索引值有效，则对应更新
		if (nIndex >= 0)
		{
			// 修改对应Pie的数据结构内容
			this->updateSliceTitle(newValue.toString(), nIndex);
		}
	}
	// 如果改变了分块颜色
	else if (strValueTitle.contains(PIE_PROPERTY_EX_COLOR_NAME))
	{
		// 获取修改属性的索引
		int nIndex = strValueTitle.remove(PIE_PROPERTY_EX_COLOR_NAME).toInt() - 1;

		// 如果索引值有效，则对应更新
		if (nIndex >= 0)
		{
			// 修改对应Pie的数据结构内容
			this->updateSliceColor(newValue.value<QColor>(), nIndex);
		}
	}

	// 如果改变了数据链接（此处应该不需要手工更新）
	else if (strValueTitle.contains(PIE_PROPERTY_EX_REFRESHLINK_NAME)
		|| strValueTitle.contains(PIE_PROPERTY_EX_LINK_NAME)
		)
	{
		
	}
	// Error：不应该执行到这里
	else
	{
		qWarning() << "[Error]: VPieChart::changeExProperties - invalid strValueTitle: " << strValueTitle;
	}
}



void VPieChart::setExplodedAll(bool explodedAll)
{
    if (this->explodedAll != explodedAll)
	{
        this->explodedAll = explodedAll;
        this->update();
    }
}

void VPieChart::setExplodedIndex(int explodedIndex)
{
    if (this->explodedIndex != explodedIndex) 
	{
        this->explodedIndex = explodedIndex;
        this->update();
    }
}

void VPieChart::setDefaultColor(bool defaultColor)
{
    Q_UNUSED(defaultColor);

}

void VPieChart::setTextColor(const QColor &textColor)
{
    if (this->m_TextColor != textColor)
	{
        this->m_TextColor = textColor;
        this->update();
    }
}

void VPieChart::setBorderColor(const QColor &borderColor)
{
    if (this->m_BorderColor != borderColor)
	{
        this->m_BorderColor = borderColor;
        this->update();
    }
}

void VPieChart::setColors(const QVector<QColor> &colors)
{
    this->m_defaultColors = colors;
    this->update();
}

void VPieChart::initPie()
{

}


/// <summary>
/// 设置显示百分比
/// </summary>
void VPieChart::loadPercent()
{
    showPercent = true;
    this->update();
}


///// <summary>
///// 清空饼图
///// </summary>
//void VPieChart::clearPie()
//{
//    m_Titles.clear();
//    m_Values.clear();
//}



void VPieChart::setHoleSize(double holeSize)
{
    if (this->holeSize != holeSize) {
        this->holeSize = holeSize;
        this->update();
    }
}


//=========================================================
//
//                       辅助函数
//
//=========================================================


double VPieChart::getSumValue()
{
	double sum = 0;
	for (int i = 0; i < m_Values.count(); i++)
	{
		sum += m_Values.at(i);
	}

	if (sum == 0.0)
	{
		sum = 1;
	}

	return sum;
}

QPoint VPieChart::getOffsetPoint(double angel, int offset)
{
	int wl = 0;
	int hl = 0;
	double ang = (angel)*M_PI / 180;
	wl = offset * qCos(ang);
	hl = offset * qSin(ang);

	if (angel > 90 && angel < 270)
	{
		wl = qAbs(wl) * -1;
	}
	else {
		wl = qAbs(wl);
	}

	if (angel < 180)
	{
		hl = qAbs(hl) * -1;
	}
	else {
		hl = qAbs(hl);
	}

	return QPoint(wl, hl);
}