#include "loginscreen.h"
#include "ui_loginscreen.h"

LoginScreen::LoginScreen(Socket* s, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::LoginScreen)
{
    ui->setupUi(this);
    ui->nickEdit->setPlaceholderText("Nickname");
    ui->serverURLEdit->setPlaceholderText("Server hostname:port");
    ui->label->setStyleSheet("QLabel { color : red}");
    ui->label->setVisible(false);
    this->s = s;
    connect(ui->connectButton,SIGNAL(clicked()),this,SLOT(connectToChat()));
    connect(ui->cancelButton,SIGNAL(clicked()),this,SLOT(cancelLogin()));
}

bool LoginScreen::validateURL(QString& URL)
{
    QRegExp regex("([a-zA-Z.]+|((\\d{1,3}\\.){3}\\d{1,3})):\\d+");
    return regex.exactMatch(URL);
}

bool LoginScreen::parseURL(QString& URL)
{
    if(validateURL(URL))
    {
        ui->label->setVisible(false);
        QStringList strings = URL.split(':');
        host = strings[0];
        port = strings[1].toInt();
        return true;
    }
    else
    {
        ui->label->setVisible(true);
        return false;
    }
}

void LoginScreen::connectToChat()
{
    QString nick;
    string response;
    QString URL = ui->serverURLEdit->text();
    if(parseURL(URL))
    {
        nick = ui->nickEdit->text();
        try
        {
            s->Create();
            s->Connect(host.toStdString(),port);
            (*s) << nick.toStdString();
            (*s) >> response;
            if(response == "CHATNICKINVALID")
            {
                ui->label->setText("Spaces not allowed in nicknames, please enter another nickname");
            }
            else if(response == "CHATNICKEXIST")
            {
                ui->label->setText("Nickname in use, please enter another nickname");
            }
            else if(response == "CHATFULL")
            {
                ui->label->setText("Chatroom is full, please wait...");
            }
            else if(response != "CHATOK")
            {
                ui->label->setText("Error: " + QString::fromStdString(response));
            }
            else
            {
                ((Chatroom*)this->parent())->setNickname(nick);
                this->accept();
                return;
            }
            ui->label->setVisible(true);
        }
        catch(SocketException& e)
        {
            cout << e.description() << endl;
            QString exception = QString::fromStdString(e.description());
            ui->label->setText(exception);
            ui->label->setVisible(true);
        }
    }
}

void LoginScreen::cancelLogin()
{
    this->reject();
}

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