#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <complex>
#include <sstream>
#include <iomanip>

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

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


void MainWindow::on_sloveButton_clicked()
{
    std::complex<double>a, b, c, D;
    a = ui->avalue->value();
    b = ui->avalue->value();
    c = ui->avalue->value();
    D = b*b-4.0*a*c;
    std::ostringstream out;
    out<< "Equation";
    if (a.real()!=0.0)
    {
        if (a*a == 1.0)
        {
            out<<(a.real()>0.0)?"x2":"-x^2";
        }
        else
        {
            out << std::setprecision(2)<<a.real() << "x^2";
        }
    }
    if (b.real()!=0.0)
    {
        if (b*b == 1.0)
        {
            out<<(b.real()>0.0)?+"+x":"-x";
        }
        else
        {
            out << (b.real()>0.0)?"+":"";
            out <<b.real() << "x";
        }
    }
    if (c.real()!=0.0)
    {
        out << (c.real()>0.0)?"+":"";
        out <<c.real() << "\n";
    }
    out << "Discriminant: " <<D.real() << "\n";
    out << "x1= " << (-b.real() - sqrt(D).real()/(2.0*a.real()));
    if ((sqrt(D).imag() != 0.0)
    {
            out <<((-sqrt(D).imag()/(2*a.real()>0.0)?"+"))))
}
    std::string output;
    output += std::to_string(a.real())+"x^2" +"+";
    output += std::to_string(b.real())+"x"+"+";
    output += std::to_string(c.real())+'\n';
    output += "Discriminant"+std::to_string(D.real()) +'\n';
    output += "x1 =" + std::to_string((-b.real() - sqrt(D).real()/(2.0*a.real()))) +'\n';
    output += " " + std::to_string((-sqrt(D).imag()/(2.0*a.real()))) + '\n';
    output += "x2 =" + std::to_string((-b.real() + sqrt(D).real()/(2.0*a.real())) )+'\n';
    output += " " + std::to_string((sqrt(D).imag()/(2.0*a.real()))) + '\n';
    ui->output_area->setText(output.c_str());

}