#include "rasplistdeleagte.h"
#include <QTime>
#include <QPainter>
#include <QDebug>

RaspListDeleagte::RaspListDeleagte(QObject *parent, short redLine , short yellowLine ) :
    QStyledItemDelegate(parent)
    ,m_redLine(redLine)
    ,m_yellowLine(yellowLine)
{
}


inline QFont getTimeFont(const QStyleOptionViewItem &option)
{
    QFont timeFont = (option.font.pointSize()>0)?option.font:QFont();
    timeFont.setPointSize(timeFont.pointSize()+3);
    timeFont.setBold(true);
    return timeFont;
}


inline QFont getNoteFont(const QStyleOptionViewItem &option)
{
    QFont noteFont = (option.font.pointSize()>0)?option.font:QFont();
    noteFont.setPointSize(noteFont.pointSize()-3);
    noteFont.setItalic(true);
    return noteFont;
}


void RaspListDeleagte::paint(QPainter *painter, const QStyleOptionViewItem &option,const QModelIndex &index) const {
    if (!index.isValid()) {
        QStyledItemDelegate::paint(painter, option, index);
    } else {
        //Draw background regarding current style;
        if (option.state & QStyle::State_Selected)
        {
            painter->fillRect(option.rect, option.palette.highlight());
        } else {
            //odd and even items should be painted different
            QBrush brush = (index.row()%2)?option.palette.base():option.palette.alternateBase();
            painter->fillRect(option.rect, brush);
        }

        //got time and note from model;
        QTime _time = index.data().toTime();
        QString time = _time.toString("hh:mm");
        int delta = QTime::currentTime().secsTo(_time);
        QString timeLeft = (delta>0) ?
                       (QTime(0,0).addSecs(delta)).toString("hh:mm"):
                       QString("--:--");
        QString note = index.data(Qt::UserRole+1).toString();
        //Draw the time with big letters, and small note under it.
        painter->save();

        //setup fonts
        QFont timeFont = getTimeFont(option);
        QFont noteFont = getNoteFont(option);

        QFontMetrics fmTF(timeFont);
        QFontMetrics fmNF(noteFont);

        //Draw the time left
        if (delta<0)
            painter->setPen(Qt::lightGray);
        else if (delta<(60*m_redLine))
            painter->setPen(Qt::red);
        else if (delta<(60*m_yellowLine))
            painter->setPen(Qt::darkYellow);
        else
            painter->setPen(Qt::green);


        painter->setFont(timeFont);
        painter->drawText(option.rect.x()+2,option.rect.y()+fmTF.height(),timeLeft);

        //Draw the time
        painter->setPen(Qt::blue);
        painter->setFont(timeFont);
        painter->drawText(option.rect.x()+2+fmTF.width(timeLeft+" "),option.rect.y()+fmTF.height(),time);

        //Draw the note
        painter->setPen(option.palette.text().color());
        painter->setFont(noteFont);
        //        painter->drawText(option.rect.x()+2, option.rect.y()+fmTF.lineSpacing()+fmNF.lineSpacing(), fmNF.elidedText(note,Qt::ElideRight,option.rect.width()));
        painter->drawText(option.rect.adjusted(fmTF.width(timeLeft+" ")+fmTF.width(time)+4,0,0,0), note);

        painter->restore();
    }
}

QSize RaspListDeleagte::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    if (!index.isValid()) return QStyledItemDelegate::sizeHint(option,index);

    QSize result;
    //setup fonts
    QFontMetrics fmTF(getTimeFont(option));
    result.setHeight(fmTF.lineSpacing()+fmTF.leading()*2+4);
    result.setWidth(option.rect.width());
    return(QSize(option.rect.width(),20));

    qDebug()<<option.decorationSize;
    return result;
}