#include "alarmEventDataView.h"
#include <QHeaderView>
#include <QVBoxLayout>
#include <QPainter>

///////------AlarmEventDataFilter-----
AlarmEventDataFilter::AlarmEventDataFilter()
{
    m_type = -1;
    m_status = -1;
}

bool AlarmEventDataFilter::matches(const EventData& event)
{
    QDateTime eventTime = QDateTime::fromMSecsSinceEpoch(event.timestamp);
    if(m_startTime.isValid() && eventTime < m_startTime)
        return false;
    if(m_endTime.isValid() && eventTime > m_endTime)
        return false;

    if(!m_station.isEmpty() && event.stationName != m_station)
        return false;

    if(!m_bay.isEmpty() && event.bayName != m_bay)
        return false;

    if(event.type != m_type)
        return false;

    if(!m_severity.isEmpty() && event.severity != m_severity)
        return false;

    if(!m_description.isEmpty() && event.description != m_description)
        return false;

    if(event.status != m_status)
        return false;

    return true;
}

void AlarmEventDataFilter::clear()
{
    m_startTime = QDateTime();
    m_endTime = QDateTime();
    m_station.clear();
    m_bay.clear();
    m_type = -1;
    m_severity.clear();
    m_description.clear();
    m_status = -1;
}


///////------AlarmEventDataModel-----
AlarmEventDataModel::AlarmEventDataModel(QObject* parent)
    : QAbstractTableModel(parent)
    ,m_maxRealTimeEvents(5)
{
    m_dataMode = Historical;
    m_paginationInfo.entriesPerPage = 100;
    m_paginationInfo.currentPage = 1;
    m_paginationInfo.totalEntries = 0;
    iniHeaderData();
}

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);
    //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");
            }
            }
        }
        case Qt::ForegroundRole:
        {
            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);

            if(event.status < 3)
                return QColor(0, 170, 255);
            else
                return QColor(0, 170, 0);
        }
        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", 270, ReceiveTime));
    m_headerData.emplace_back(SectionData("SOE时间", 270, 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", 200, Type));
    m_headerData.emplace_back(SectionData("等级", 150, Severity));
    m_headerData.emplace_back(SectionData("确认状态", 150, Status));
    m_headerData.emplace_back(SectionData("操作", 300, Operation));
}

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

void AlarmEventDataModel::applyFilter()
{}

void AlarmEventDataModel::refresh()
{}

void AlarmEventDataModel::updateCurPageData()
{
    beginResetModel();

    m_displayEvents.clear();

    endResetModel();
}

void AlarmEventDataModel::updateTotalCount()
{}

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::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（从小到大）
    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();
}


///////------AlarmEventDataDelegate-----
AlarmEventDataDelegate::AlarmEventDataDelegate(QTableView* view, QObject* parent)
    : QStyledItemDelegate(parent)
    ,m_tableView(view)
{}

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, 200));
    else
        painter->fillRect(opt.rect, QColor(11, 26, 33, 0));

    //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)
    if(m_tableView)
    {
        painter->save();
        QPen pen(QColor(60,60,60), 1);
        painter->setPen(pen);
        if(index.column() != m_tableView->model()->columnCount() - 1)
            painter->drawLine(opt.rect.topRight(), opt.rect.bottomRight());
        painter->restore();
    }

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


///////------AlarmEventDataView-----
AlarmEventDataView::AlarmEventDataView(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(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);
    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()
{}