#include "alarmEventDataView.h"
#include "alarmEventDataService.h"
#include <QHeaderView>
#include <QVBoxLayout>
#include <QPainter>
#include <QTimer>
#include <QRandomGenerator>
#include <QMouseEvent>
//#include <QApplication>

///////------AlarmEventDataModel-----
AlarmEventDataModel::AlarmEventDataModel(AlarmDataMode mode, QObject* parent)
    : QAbstractTableModel(parent)
    , m_dataMode(mode)
    , m_maxRealTimeEvents(5)
{
    if(m_dataMode == RealTime) //创建几个“空事件”来初始化表格
    {
        for(int i = 0; i < m_maxRealTimeEvents; ++i)
        {
            EventData event;
            event.id = ""; //空事件
            event.timestamp = 0; //给一个初始值，后续的实际事件会根据时间排名，不给初始值的话这个时间值不确定
            m_displayEvents.append(event);
        }
    }

    m_paginationInfo.entriesPerPage = 100;
    m_paginationInfo.currentPage = 1;
    m_paginationInfo.totalEntries = 0;
    iniHeaderData();

    connect(AlarmEventDataService::instance(), &AlarmEventDataService::realTimeEventReceived, this, &AlarmEventDataModel::onRealTimeEventReceived);
    connect(AlarmEventDataService::instance(), &AlarmEventDataService::historicalQueryData, this, &AlarmEventDataModel::onHistoricalEventsReceived);
    AlarmEventDataService::instance()->start();


    //实时数据测试
    m_simulatedDataTimer = new QTimer(this);
    connect(m_simulatedDataTimer, &QTimer::timeout, this, &AlarmEventDataModel::onTimeoutSimulateData);
    m_simulatedDataTimer->start(3000);
}

AlarmEventDataModel::~AlarmEventDataModel()
{}

QModelIndex AlarmEventDataModel::index(int row, int column, const QModelIndex& parent) const
{
    if(!hasIndex(row, column, parent))
        return QModelIndex();

    if(column > m_headerData.count())
        return QModelIndex();

    return createIndex(row, column);
}

QVariant AlarmEventDataModel::data(const QModelIndex& index, int role) const
{
    if(!index.isValid())
        return QVariant();

    int row = index.row();
    int col = index.column();
    int globalRow = (m_paginationInfo.currentPage - 1) * m_paginationInfo.entriesPerPage + row;
    const EventData& event = m_displayEvents.at(row);
    if(event.id.isEmpty()) //无效事件
        return QVariant();
    //EventData event = m_displayEvents[row];

    switch (role)
    {
        case Qt::DisplayRole:
        {
            switch(col)
            {
                case Index:
                    return QString::number(globalRow + 1);
                case ReceiveTime:
                    return QDateTime::fromMSecsSinceEpoch(event.timestamp).toString("yyyy-MM-dd hh:mm:ss");
                case SOETime:
                    return QDateTime::fromMSecsSinceEpoch(event.timestamp).toString("yyyy-MM-dd hh:mm:ss");
                case Station:
                    return event.stationName;
                case Bay:
                    return event.bayName;
                case Description:
                    return event.description;
                case Type:
                    return event.type;
                case Severity:
                    return event.severity;
                case Status:
                {
                    if(event.status < 3)
                        return QString("未确认");
                    else
                        return QString("已确认");
                }
                default:
                    return QVariant();
            }
        }
        case Qt::ForegroundRole:
        {
            switch(col)
            {
                case Severity:
                {
                    if(event.severity == "事故")
                        return QColor(255, 85, 0);
                    else if(event.severity == "异常")
                        return QColor(255, 170, 0);
                    else if(event.severity == "预警")
                        return QColor(0, 170, 255);
                    else if(event.severity == "告知")
                        return QColor(0, 170, 0);
                    else
                        return QColor(250, 250, 250);
                }
                case Status:
                {
                    if(event.status < 3)
                        return QColor(0, 170, 255);
                    else
                        return QColor(0, 170, 0);
                }
               default:
                    return QColor(250, 250, 250);
            }
        }
        case Qt::TextAlignmentRole:
            return Qt::AlignCenter; //居中展示
        default:
            return QVariant();
    }
}

QVariant AlarmEventDataModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if(orientation == Qt::Horizontal && role == Qt::DisplayRole)
        return m_headerData.at(section).text;

    return QAbstractItemModel::headerData(section, orientation, role);
}

int AlarmEventDataModel::rowCount(const QModelIndex& parent) const
{
    return m_displayEvents.count();
}

int AlarmEventDataModel::columnCount(const QModelIndex& parent) const
{
    return m_headerData.isEmpty() ? 0 : m_headerData.count();
}

Qt::ItemFlags AlarmEventDataModel::flags(const QModelIndex& index) const
{
    if(!index.isValid())
        return Qt::NoItemFlags;

    Qt::ItemFlags flags = QAbstractTableModel::flags(index);
    flags |= Qt::ItemIsEditable; //不可编辑

    return flags;
}

void AlarmEventDataModel::iniHeaderData()
{
    m_headerData.emplace_back(SectionData("序号", 90, Index));
    m_headerData.emplace_back(SectionData("接收时间", 200, ReceiveTime));
    m_headerData.emplace_back(SectionData("SOE时间", 200, SOETime));
    m_headerData.emplace_back(SectionData("厂站", 200, Station));
    m_headerData.emplace_back(SectionData("间隔", 200, Bay));
    m_headerData.emplace_back(SectionData("信息", -1, Description));
    m_headerData.emplace_back(SectionData("类型", 160, Type));
    m_headerData.emplace_back(SectionData("等级", 160, Severity));
    m_headerData.emplace_back(SectionData("确认状态", 150, Status));
    m_headerData.emplace_back(SectionData("操作", 180, Operation));
}

/*void AlarmEventDataModel::setMode(AlarmDataMode mode)
{
    if(m_dataMode == mode)
        return;

    m_dataMode = mode;
    if(mode == Historical)
    {}
    else
    {}
}*/

void AlarmEventDataModel::setMaxRealTimeEvents(int count)
{
    if(m_dataMode == RealTime) //实时列表初始化表格
    {
        if(m_maxRealTimeEvents == count)
            return;
        else if(m_maxRealTimeEvents < count)
        {
            int DValue = count - m_maxRealTimeEvents;
            for(int i = 0; i < DValue; ++i)
                m_displayEvents.removeLast();
        }
        else if(m_maxRealTimeEvents > count)
        {
            int DValue = m_maxRealTimeEvents - count;
            for(int i = 0; i < DValue; ++i)
            {
                EventData event;
                event.id = ""; //空事件
                m_displayEvents.append(event);
            }
        }

        m_maxRealTimeEvents = count;
    }
}

void AlarmEventDataModel::setFilter(const AlarmEventDataFilter& filter)
{
    m_currentFilter = filter;
    refresh();
}

void AlarmEventDataModel::applyFilter()
{
    m_filteredEvents.clear();

    if(m_allEvents.size() > 0)
        m_filteredEvents = m_currentFilter.apply(m_allEvents);
}

void AlarmEventDataModel::refresh()
{
    m_allEvents.clear();
    //1.通过服务获取当前时间段的所有事件-m_allEvents

    //2.过滤事件(时间区间作为服务请求参数，其它过滤在本地完成)-m_filteredEvents
    applyFilter();
    //3.更新页码数据
    updatePaginationInfo();
    //4.根据页码刷新当前页面数据()-m_displayEvents
    updateCurPageData();
}

void AlarmEventDataModel::updatePaginationInfo()
{
    m_paginationInfo.totalEntries = m_filteredEvents.size();
    m_paginationInfo.totalPages = qCeil(static_cast<qreal>(m_paginationInfo.totalEntries) / m_paginationInfo.entriesPerPage);
    if(m_paginationInfo.totalPages == 0)
        m_paginationInfo.currentPage = 1;
    else if(m_paginationInfo.currentPage > m_paginationInfo.totalPages)
        m_paginationInfo.currentPage = m_paginationInfo.totalPages;
}

int AlarmEventDataModel::findEventDataIndexById(const QString& eventId)
{
    for(int i = 0; i < m_displayEvents.size(); i++)
    {
        if(m_displayEvents.at(i).id == eventId)
            return i;
    }

    return -1;
}

void AlarmEventDataModel::updateEventData(int index, const EventData& updatedEvent)
{
    if(index < 0 || index >= m_displayEvents.size())
        return;

    m_displayEvents[index] = updatedEvent;
    //更新视图
    QModelIndex modelIndex = createIndex(index, 0);
    emit dataChanged(modelIndex, modelIndex);
}

void AlarmEventDataModel::updateCurPageData()
{
    m_displayEvents.clear();
    int startIndex = (m_paginationInfo.currentPage - 1) * m_paginationInfo.entriesPerPage;
    int endIndex = qMin(startIndex + m_paginationInfo.entriesPerPage, m_filteredEvents.size());

    beginResetModel();

    if(startIndex < m_filteredEvents.size())
        m_displayEvents = m_filteredEvents.mid(startIndex, endIndex - startIndex);

    endResetModel();
}

void AlarmEventDataModel::onTimeoutSimulateData()
{
    //模拟实时告警数据
    static int id = 0, min = 0, max = 3;
    int randomInt = min + QRandomGenerator::global()->bounded(min, max + 1);
    QString strID = QString::number(++id);
    //qDebug() << id << " " << strID;
    EventData event;
    event.id = strID;
    event.name = QString("实时告警") + strID;
    event.timestamp = QDateTime::currentMSecsSinceEpoch();
    event.stationName = QString("厂站") + QString::number(randomInt);
    event.bayName = QString("间隔") + QString::number(randomInt);
    event.description = "";
    event.type = 5;
    QString severity = QString("预警");
    if(randomInt == 0)
        severity = QString("告知");
    else if(randomInt == 1)
        severity = QString("预警");
    else if(randomInt == 2)
        severity = QString("异常");
    else if(randomInt == 3)
        severity = QString("事故");
    event.severity = severity;
    event.status = 0;
    onRealTimeEventReceived(event);
}

void AlarmEventDataModel::onRealTimeEventReceived(const EventData& event)
{
    if(m_dataMode != RealTime)
        return;

    int index = findEventDataIndexById(event.id);
    if(index >= 0)
    {
        updateEventData(index, event);
        return;
    }

    beginResetModel();

    //插入数据之前，先判断当前是否达到最大显示条目，达到的话删除最靠前（时间）的条目
    if(m_displayEvents.size() >= m_maxRealTimeEvents)
        m_displayEvents.removeLast();

    //按照时间顺序排序（从后到前）
    int insertPosition = 0;
    for(; insertPosition < m_displayEvents.size(); ++insertPosition)
    {
        if(event.timestamp > m_displayEvents.at(insertPosition).timestamp)
            break;
    }

    if(insertPosition < m_displayEvents.size())
        m_displayEvents.insert(insertPosition, event);
    else
        m_displayEvents.append(event);

    endResetModel();

    emit receivedNewAlarm(event);
}

void AlarmEventDataModel::onHistoricalEventsReceived(const QList<EventData>& events)
{

}

bool AlarmEventDataModel::setCurrentPage(int page)
{
    if(m_paginationInfo.currentPage != page && page > 0 && page <= m_paginationInfo.totalPages)
    {
        m_paginationInfo.currentPage = page;
        updateCurPageData();
        return true;
    }

    return false;
}

void AlarmEventDataModel::previousPage()
{
    if(m_paginationInfo.currentPage == 1)
        return;

    int page = m_paginationInfo.currentPage;
    setCurrentPage(--page);
}

void AlarmEventDataModel::nextPage()
{
    if(m_paginationInfo.currentPage == m_paginationInfo.totalPages)
        return;

    int page = m_paginationInfo.currentPage;
    setCurrentPage(++page);
}

void AlarmEventDataModel::firstPage()
{
    if(m_paginationInfo.currentPage == 1)
        return;

    setCurrentPage(1);
}

void AlarmEventDataModel::lastPage()
{
    if(m_paginationInfo.currentPage == m_paginationInfo.totalPages)
        return;

    setCurrentPage(m_paginationInfo.totalPages);
}


///////------AlarmEventDataDelegate-----
AlarmEventDataDelegate::AlarmEventDataDelegate(QTableView* view, QObject* parent)
    : QStyledItemDelegate(parent)
    ,m_tableView(view)
{
    m_btnConfirm.text = QString("确 认");
    m_btnConfirm.textColor = QColor(34, 177, 16);
    m_btnConfirm.borderColor = QColor(34, 177, 16);
    m_btnConfirm.borderWidth = 1;
    m_btnConfirm.borderRaius = 2;
    m_btnConfirm.normalBgColor = Qt::transparent;
    m_btnConfirm.hoverBgColor = QColor(34, 177, 16, 80);
    m_btnConfirm.pressedBgColor = Qt::transparent;

    m_btnReplay.text = QString("回 放");
    m_btnReplay.textColor = QColor(86, 156, 214);
    m_btnReplay.borderColor = QColor(86, 156, 214);
    m_btnReplay.borderWidth = 1;
    m_btnReplay.borderRaius = 2;
    m_btnReplay.normalBgColor = Qt::transparent;
    m_btnReplay.hoverBgColor = QColor(86, 156, 214, 80);
    m_btnReplay.pressedBgColor = Qt::transparent;
}

AlarmEventDataDelegate::~AlarmEventDataDelegate()
{}

void AlarmEventDataDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    //根据行号设置交替颜色
    QStyleOptionViewItem opt = option;
    initStyleOption(&opt, index);
    if((index.row() + 1) % 2 == 0)
        painter->fillRect(opt.rect, QColor(11, 26, 33, 100));
    else
        painter->fillRect(opt.rect, QColor(11, 26, 33, 0));

    if(m_tableView)
    {
        //绘制单元格边框(只绘制右边框，每行的最后一个单元格不绘制)
        painter->save();
        QPen pen(QColor(60,60,60), 1, Qt::DotLine);
        painter->setPen(pen);
        if(index.column() != m_tableView->model()->columnCount() - 1)
        {
            //opt.rect.adjust(1, 0, 1, 0);
            painter->drawLine(opt.rect.topRight(), opt.rect.bottomRight());
        }
        painter->restore();

        //绘制操作按钮
        QModelIndex numIndex = m_tableView->model()->index(index.row(), 0);
        QString number = numIndex.data(Qt::DisplayRole).toString();
        if(!number.isEmpty() && index.column() == m_tableView->model()->columnCount() - 1)
        {
            int nMarginH = 10;
            int nMarginV = 5;
            int nSpacing = 10;
            int nBtnWidth = (opt.rect.width() - nMarginH * 2 - nSpacing) * 0.5;
            int nBtnHeight = opt.rect.height() - nMarginV * 2;

            /*QStyleOptionButton btnConfirm;
            btnConfirm.text = QString("确 认");
            btnConfirm.rect = QRect(opt.rect.left() + nMarginH, opt.rect.top() + nMarginV, nBtnWidth, nBtnHeight);
            btnConfirm.state |= QStyle::State_Enabled;
            QStyleOptionButton btnReplay;
            btnReplay.text = QString("回 放");
            btnReplay.rect = QRect(btnConfirm.rect.right() + nSpacing, opt.rect.top() + nMarginV, nBtnWidth, nBtnHeight);
            btnReplay.state |= QStyle::State_Enabled;

            // 绘制按钮
            QApplication::style()->drawControl(QStyle::CE_PushButton, &btnConfirm, painter);
            QApplication::style()->drawControl(QStyle::CE_PushButtonLabel, &btnReplay, painter);*/

            const_cast<AlarmEventDataDelegate*>(this)->m_btnConfirm.rect = QRect(opt.rect.left() + nMarginH, opt.rect.top() + nMarginV, nBtnWidth, nBtnHeight);
            const_cast<AlarmEventDataDelegate*>(this)->m_btnReplay.rect = QRect(m_btnConfirm.rect.right() + nSpacing, opt.rect.top() + nMarginV, nBtnWidth, nBtnHeight);

            painter->save();

            painter->setRenderHint(QPainter::Antialiasing, true);
            //绘制‘确认’按钮
            QPen rectPen;
            rectPen.setColor(m_btnConfirm.borderColor);
            rectPen.setWidth(m_btnConfirm.borderWidth);
            painter->setPen(rectPen);
            QColor brushColor = m_btnConfirm.normalBgColor;
            bool isHover = opt.state.testFlag(QStyle::State_MouseOver) && m_btnConfirm.rect.contains(m_mousePositon); //opt.state.testFlag(QStyle::State_MouseOver)表示鼠标是否悬停在该视图项（即单元格）上
            //bool isPressed = opt.state.testFlag(QStyle::State_Sunken) && m_btnConfirm.rect.contains(m_mousePositon);//opt.state.testFlag(QStyle::State_Sunken)表示鼠标是否在该视图项（即单元格）上按下
            bool isPressed = m_buttonColumnIsPress && m_btnConfirm.rect.contains(m_mousePositon); //opt.state.testFlag(QStyle::State_Sunken)总是为false且未找到原因
            //注意判断顺序，一定要先先判断press
            if(isPressed)
                brushColor = m_btnConfirm.pressedBgColor;
            else if(isHover)
                brushColor = m_btnConfirm.hoverBgColor;
            painter->setBrush(brushColor);
            painter->drawRoundedRect(m_btnConfirm.rect, m_btnConfirm.borderRaius, m_btnConfirm.borderRaius);
            painter->setPen(m_btnConfirm.textColor);
            painter->drawText(m_btnConfirm.rect, Qt::AlignCenter, m_btnConfirm.text);
            //绘制‘回放’按钮
            rectPen.setColor(m_btnReplay.borderColor);
            rectPen.setWidth(m_btnReplay.borderWidth);
            painter->setPen(rectPen);
            brushColor = m_btnReplay.normalBgColor;
            isHover = opt.state.testFlag(QStyle::State_MouseOver) && m_btnReplay.rect.contains(m_mousePositon);
            //isPressed = opt.state.testFlag(QStyle::State_Sunken) && isHover;
            isPressed = m_buttonColumnIsPress && m_btnReplay.rect.contains(m_mousePositon);
            if(isPressed)
                brushColor = m_btnReplay.pressedBgColor;
            else if(isHover)
                brushColor = m_btnReplay.hoverBgColor;
            painter->setBrush(brushColor);
            painter->drawRoundedRect(m_btnReplay.rect, m_btnReplay.borderRaius, m_btnReplay.borderRaius);
            painter->setPen(m_btnReplay.textColor);
            painter->drawText(m_btnReplay.rect, Qt::AlignCenter, m_btnReplay.text);

            painter->restore();
        }
    }

    if(opt.state.testFlag(QStyle::State_Selected))
    {
        //方法1：移除选中状态，防止选中改变文字颜色
        //opt.state &= ~QStyle::State_Selected;

        //方法2
        QColor originalTextColor = opt.palette.color(QPalette::Text);
        opt.palette.setColor(QPalette::HighlightedText, originalTextColor);
    }

    //绘制默认内容
    QStyledItemDelegate::paint(painter, opt, index);
}

bool AlarmEventDataDelegate::editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex& index)
{
    if(m_tableView && index.column() == m_tableView->model()->columnCount() - 1) //只处理操作按钮所在列的事件
    {
        QMouseEvent *mouseEvent = static_cast<QMouseEvent*>(event);
        m_mousePositon = mouseEvent->pos();
        m_buttonColumnIsPress = false;

        if(mouseEvent->type() == QEvent::MouseMove)
        {
            emit m_tableView->model()->dataChanged(index, index); //触发重绘
        }
        else if(mouseEvent->button() == Qt::LeftButton && mouseEvent->type() == QEvent::MouseButtonPress)
        {
            m_buttonColumnIsPress = true;
            emit m_tableView->model()->dataChanged(index, index); //触发重绘
            //qDebug() << option.state.testFlag(QStyle::State_Sunken);
        }
        else if(mouseEvent->button() == Qt::LeftButton && mouseEvent->type() == QEvent::MouseButtonRelease)
        {
            emit m_tableView->model()->dataChanged(index, index); //触发重绘
            if(m_btnConfirm.rect.contains(m_mousePositon))
                emit confirmBtnClicked(index);
            else if(m_btnReplay.rect.contains(m_mousePositon))
                emit replayBtnClicked(index);
        }
    }

    return QStyledItemDelegate::editorEvent(event, model, option, index);
}


///////------AlarmEventDataView-----
AlarmEventDataView::AlarmEventDataView(AlarmDataMode mode, QWidget* parent)
    : QWidget(parent)
{
    m_tableView = new QTableView(this);
    m_tableView->verticalHeader()->setVisible(false);
    m_tableView->setEditTriggers(QAbstractItemView::NoEditTriggers);
    //m_tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
    m_tableView->setShowGrid(false);
    //m_tableView->setStyleSheet("QHeaderView{background-color: rgb(40, 40, 40);} QHeaderView::section{background-color:transparent;}");

    m_tableModel = new AlarmEventDataModel(mode, this);
    m_tableView->setModel(m_tableModel);
    //设置表头
    const QVector<AlarmEventDataModel::SectionData> headerData = m_tableModel->headerData();
    for(int i = 0; i < headerData.size(); i++)
    {
        if(headerData.at(i).width == -1)
            m_tableView->horizontalHeader()->setSectionResizeMode(i, QHeaderView::Stretch);
        else
            m_tableView->setColumnWidth(i, headerData.at(i).width);
    }

    m_delegate = new AlarmEventDataDelegate(m_tableView, this);
    connect(m_delegate, &AlarmEventDataDelegate::confirmBtnClicked, this, &AlarmEventDataView::onBtnClicked_Confirm);
    connect(m_delegate, &AlarmEventDataDelegate::replayBtnClicked, this, &AlarmEventDataView::onBtnClicked_Replay);
    m_tableView->setItemDelegate(m_delegate);

    m_vLayout = new QVBoxLayout(this);
    m_vLayout->setSpacing(0);
    m_vLayout->setContentsMargins(0, 0, 0, 0);
    m_vLayout->addWidget(m_tableView);
    this->setLayout(m_vLayout);
}

AlarmEventDataView::~AlarmEventDataView()
{}

/*void AlarmEventDataView::setModelMode(AlarmDataMode mode, int maxRealTimeEvents)
{
    if(m_tableModel)
    {
        m_tableModel->setMode(mode);
        if(mode == RealTime)
            m_tableModel->setMaxRealTimeEvents(maxRealTimeEvents);
    }
}*/

void AlarmEventDataView::onBtnClicked_Confirm(const QModelIndex& index)
{
    qDebug() << QString("confirmBtnClicked, row: %1").arg(index.row());
}

void AlarmEventDataView::onBtnClicked_Replay(const QModelIndex& index)
{
    qDebug() << QString("replayBtnClicked, row: %1").arg(index.row());
}