#include "espospinbox.h"

espoSpinBox::espoSpinBox(QWidget *parent) : QDoubleSpinBox(parent)
{
	setKeyboardTracking(false);
    //connect(this, SIGNAL(valueChanged(double)), this, SLOT(changeStepping(double)));
}

QString espoSpinBox::textFromValue(double value) const{
    QString windowText;
	
	double approximatelyZero = pow(10, -1 * (decimals() + 1));

    if (abs(value) <= approximatelyZero){
        QTextStream(&windowText) << 0;
		lastValidValue = 0;
        return windowText;
    }
    if (abs(value) >= 1000000){
        QTextStream(&windowText) << value/1000000 << "M";
		lastValidValue = value;
        return windowText;
    }
    if (abs(value) >= 1000){
        QTextStream(&windowText) << value/1000 << "k";
		lastValidValue = value;
        return windowText;
    }
    if (abs(value) >= 1){
        QTextStream(&windowText) << value;
		lastValidValue = value;
        return windowText;
    }
    if (abs(value) >= 1/1000){
        QTextStream(&windowText) << value * 1000 << "m";
		lastValidValue = value;
        return windowText;
    }
    if (abs(value) >= 1/1000000){
        QTextStream(&windowText) << value * 1000000 << "u";
		lastValidValue = value;
        return windowText;
    }
    return "invalid";
}

void espoSpinBox::maximumChanged(double linked){
    this->setMaximum(9.6-linked);
}

void espoSpinBox::setMax(double newMax){
    this->setMaximum(newMax);
}

void espoSpinBox::setMin(double newMin){
    this->setMinimum(newMin);
}

void espoSpinBox::changeStepping(double value){
    double roundval = pow(10.0, floor(log10(abs(value))));  //http://stackoverflow.com/questions/22491505/how-to-round-down-to-the-nearest-power-of-10
	double minimumStepSize = pow(10, -1 * decimals());
    setSingleStep(std::max(minimumStepSize, roundval/10));
}

QValidator::State espoSpinBox::validate(QString& text, int& pos) const
{
	return QValidator::State::Acceptable;	
}

double espoSpinBox::valueFromText(const QString &text) const
{
	double ret;
	bool isValid;

	uint32_t prefixLength = text.length() - suffix().length();

	qDebug() << text.mid(0, prefixLength - 1) << text.at(prefixLength - 1).toLatin1(); 
	
	switch (text.at(prefixLength - 1).toLatin1())
	{
		case 'M':
			ret = text.mid(0, prefixLength - 1).toDouble(&isValid) * 1000000;
			break; 

		case 'k':
			ret = text.mid(0, prefixLength - 1).toDouble(&isValid) * 1000;
			break; 

		case 'm':
			ret = text.mid(0, prefixLength - 1).toDouble(&isValid) / 1000;
			break; 
		
		case 'u':
			ret = text.mid(0, prefixLength - 1).toDouble(&isValid) / 1000000;
			break; 

		default:
			ret = text.mid(0, prefixLength).toDouble(&isValid); 
	}		

	if (isValid)
	{
		return ret;
	}
	else
	{
		qDebug() << "espoSpinBox: warning: invalid text input." << "Defaulting to last known good value of" << lastValidValue;
		return lastValidValue;
	}
}