#include <stdio.h>
#include "mainwindow.h"
#include "displayarea.h"
#include "inputparser.h"
#include <QTimer>
#include <QThread>
#include <QAction>
#include <QImageWriter>
#include <QMenu>
#include <QDir>
#include <QFileDialog>
#include <QMenuBar>
#include <QGuiApplication>
#include <QScreen>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent),displayArea(new DisplayArea(this))
{
    displayArea->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
    scrollArea = new QScrollArea();
    scrollArea->setWidget(displayArea);
    setCentralWidget(scrollArea);

    createActions();
    createMenus();

    setWindowTitle(tr("LivePow"));
    resize(QGuiApplication::primaryScreen()->availableSize() * 3 / 5);
}

MainWindow::~MainWindow()
{
}

void MainWindow::sendArgs(QCommandLineParser *argsParser)
{
    const QStringList posArgs = argsParser->positionalArguments();

    FILE* input=stdin;

    if(posArgs.length()==1){
        QFile file(posArgs.at(0));
        QFileInfo fileInfo(file);
        input=fopen(fileInfo.absoluteFilePath().toLatin1(),"r");
    }
    else if(posArgs.length()>1) fprintf(stderr,"too much positionnal args, using stdin");

    parser=new InputParser(input,displayArea);

    unsigned long nbOfLinesToSkip=0;
    if(argsParser->isSet("s")){
        nbOfLinesToSkip=argsParser->value("s").toLong();
    }

    QString palettePath=NULL;
    if(argsParser->isSet("p")){
        palettePath=argsParser->value("p");
    }
    parser->sendParameters(nbOfLinesToSkip,palettePath);

    QThread* workerThread=new QThread();

    parser->moveToThread(workerThread);
    connect(workerThread, &QThread::started, parser, &InputParser::process);
    connect(workerThread, &QThread::finished, workerThread, &QThread::deleteLater);
    workerThread->start();
}

void MainWindow::save(){
    QAction *action = qobject_cast<QAction *>(sender());
    QByteArray fileFormat = action->data().toByteArray();
    saveFile(fileFormat);
}

bool MainWindow::saveFile(const QByteArray &fileFormat)
{
    QString initialPath = QDir::currentPath() + "/untitled." + fileFormat;

    QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
                                                    initialPath,
                                                    tr("%1 Files (*.%2);;All Files (*)")
                                                    .arg(QString::fromLatin1(fileFormat.toUpper()),QString::fromLatin1(fileFormat)));
    if (fileName.isEmpty())
        return false;
    return displayArea->saveImage(fileName, fileFormat.constData());
}

void MainWindow::createActions()
{
    const QList<QByteArray> imageFormats = QImageWriter::supportedImageFormats();
    for (const QByteArray &format : imageFormats) {
        QString text = tr("%1...").arg(QString::fromLatin1(format).toUpper());

        QAction *action = new QAction(text, this);
        action->setData(format);
        connect(action, &QAction::triggered, this, &MainWindow::save);
        saveAsActs.append(action);
    }
}

void MainWindow::createMenus()
{
    saveAsMenu = new QMenu(tr("&Save As"), this);
    for (QAction *action : qAsConst(saveAsActs))
        saveAsMenu->addAction(action);

    fileMenu = new QMenu(tr("&File"), this);
    fileMenu->addMenu(saveAsMenu);

    menuBar()->addMenu(fileMenu);
}