#include "widget.h"
#include "ui_widget.h"
#include <math.h>
#include <QMessageBox>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
}

Widget::~Widget()
{
    delete ui;
}

bool flagMI, flagPL, flagDI, flagSQ, flagMU;



//ф-ции radiobutton




void Widget::on_SQbutton_clicked()
{
    flagSQ = true;
    flagMI = flagPL = flagDI = flagMU = false;
    ui->input2->hide();
    ui->op2->hide();
    ui->REname->setText("evolution");
    ui->op1->setText("radicand");
}

void Widget::on_DIbutton_clicked()
{
    flagDI = true;
    flagMI = flagPL = flagSQ = flagMU = false;
    ui->input2->show();
    ui->op2->show();
    ui->REname->setText("division");
    ui->op1->setText("dividend");
    ui->op2->setText("divisor");
}

void Widget::on_MUbutton_clicked()
{
    flagMU = true;
    flagMI = flagPL = flagSQ = flagDI = false;
    ui->input2->show();
    ui->op2->show();
    ui->REname->setText("multiplication");
    ui->op1->setText("multiplicands");
    ui->op2->setText("multiplier");
}

void Widget::on_MIbutton_clicked()
{
    flagMI = true;
    flagMU = flagPL = flagSQ = flagDI = false;
    ui->input2->show();
    ui->op2->show();
    ui->REname->setText("difference");
    ui->op1->setText("minuend");
    ui->op2->setText("subtrahend");
}

void Widget::on_PLbutton_clicked()
{
    flagPL = true;
    flagMU = flagMI = flagSQ = flagDI = false;
    ui->input2->show();
    ui->op2->show();
    ui->REname->setText("sum");
    ui->op1->setText("1st addend");
    ui->op2->setText("2nd addend");
}





//ф-ции главной кнопки(calculate)



void Widget::on_RESULTbutton_clicked()
{


    if(flagSQ) {                                                           //sqrt
        QString str1 = ui->input1->text();
        bool ok1;
        double aa = str1.toDouble(&ok1);
        if(ok1 and aa >= 0) {
            double SQ = sqrt(aa);
            QString SQ_str = QString::number(SQ);
            ui->output1->setText(SQ_str);
        }
        else if(aa < 0){
            QMessageBox::warning(this,"error","negative number!");
            ui->output1->setText(" ");
        }
        else if(ok1 == false){
            QMessageBox::warning(this,"error","no number!");
            ui->output1->setText(" ");
        }
    }
    if (flagDI){                                                                 //:
        QString str1 = ui->input1->text();
        QString str2 = ui->input2->text();
        bool ok1,ok2;
        double aa = str1.toDouble(&ok1);
        double bb = str2.toDouble(&ok2);
        if(bb != 0 and ok1 and ok2){
            double DI = aa/bb;
            QString DI_str = QString::number(DI);
            ui->output1->setText(DI_str);
        }
        else if(bb == 0 and ok1 and ok2){
            QMessageBox::warning(this,"error","division by zero!");
            ui->output1->setText(" ");
        }
        else if(ok1 == false){
            QMessageBox::warning(this,"error","no number in 1st");
            ui->output1->setText(" ");
        }
        else if(ok2 == false){
            QMessageBox::warning(this,"error","no number in 2nd");
            ui->output1->setText(" ");

        }
        else if(ok1 == ok2 == false){
            QMessageBox::warning(this,"error","no number in 1st and 2nd");
            ui->output1->setText(" ");
        }
    }
    if (flagMU){                                                                      //*
        QString str1 = ui->input1->text();
        QString str2 = ui->input2->text();
        bool ok1,ok2;
        double aa = str1.toDouble(&ok1);
        double bb = str2.toDouble(&ok2);
        if(ok1 and ok2){
            double MU = aa*bb;
            QString MU_str = QString::number(MU);
            ui->output1->setText(MU_str);
        }
        else if(ok1 == false){
            QMessageBox::warning(this,"error","no number in 1st");
            ui->output1->setText(" ");
        }
        else if(ok2 == false){
            QMessageBox::warning(this,"error","no number in 2nd");
            ui->output1->setText(" ");

        }
        else if(ok1 == ok2 == false){
            QMessageBox::warning(this,"error","no number in 1st and 2nd");
            ui->output1->setText(" ");
        }

    }
    if(flagMI){                                                                       //-
        QString str1 = ui->input1->text();
        QString str2 = ui->input2->text();
        bool ok1,ok2;
        double aa = str1.toDouble(&ok1);
        double bb = str2.toDouble(&ok2);
        if(ok1 and ok2){
            double MI = aa-bb;
            QString MI_str = QString::number(MI);
            ui->output1->setText(MI_str);
        }
        else if(ok1 == false){
            QMessageBox::warning(this,"error","no number in 1st");
            ui->output1->setText(" ");
        }
        else if(ok2 == false){
            QMessageBox::warning(this,"error","no number in 2nd");
            ui->output1->setText(" ");

        }
        else if(ok1 == ok2 == false){
            QMessageBox::warning(this,"error","no number in 1st and 2nd");
            ui->output1->setText(" ");
        }
    }
    if(flagPL){                                                                   //+
        QString str1 = ui->input1->text();
        QString str2 = ui->input2->text();
        bool ok1,ok2;
        double aa = str1.toDouble(&ok1);
        double bb = str2.toDouble(&ok2);
        if(ok1 and ok2){
            double PL = aa+bb;
            QString PL_str = QString::number(PL);
            ui->output1->setText(PL_str);
        }
        else if(ok1 == false){
            QMessageBox::warning(this,"error","no number in 1st");
            ui->output1->setText(" ");
        }
        else if(ok2 == false){
            QMessageBox::warning(this,"error","no number in 2nd");
            ui->output1->setText(" ");

        }
        else if(ok1 == ok2 == false){
            QMessageBox::warning(this,"error","no number in 1st and 2nd");
            ui->output1->setText(" ");
        }
    }

}