interface.cpp

#include "interface.hpp"
#include "ui_interface.h"

#include "savingdialog.hpp"
#include "structurewriter.hpp"
#include "structurereader.hpp"
#include "factory.hpp"
#include "transitionrule.hpp"
#include "neighborhoodrule.hpp"
#include "propertyvisitors.hpp"
#include "modelloadingdialog.hpp"
#include "configurationloadingdialog.hpp"
#include "neighborhoodDialog.hpp"

#include <QJsonArray>
#include <QDate>
#include <QTextStream>
#include <QInputDialog>
#include <QTimer>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
      , ui(new Ui::MainWindow)
      , simulation()
      , timer(new QTimer(this))
      , m_customizing(false)
{
    ui->setupUi(this);

    m_transition_rule = nullptr;
    m_neighborhood_rule = nullptr;

    init_transition_neighborhood_list();
    update_transition_settings();
    update_neighborhood_settings();

    connect(ui->action_save_struct, &QAction::triggered, this, &MainWindow::afficher_interface_sauvegarde_structure);
    connect(ui->struct_library, &StructureLibraryView::structure_copied, this, &MainWindow::copy_structure_clicked);
    connect(ui->grid_view, &GridView::zoom_changed, ui->struct_library, &StructureLibraryView::update_cell_pixel_size);
    connect(ui->transition_list, QOverload<int>::of(&QComboBox::currentIndexChanged), this, [this](int)
            { update_transition_settings(); });
    connect(ui->action_propos_de_Cellulut, &QAction::triggered, this, [this](bool)
            {
                QMessageBox::about(this, "À propos de Cellulut",
                                   "Projet de C++ réalisé dans le cadre de l'UV LO21 de l'UTC.\n\n"
                                   "Contributeurs : Anthony Noir, Eugène Pin, Merwane Bouri, Arthur Detree, Yann Boucher");
            });
    connect(ui->action_propos_de_Qt, &QAction::triggered, this, [this](bool)
            {
                QMessageBox::aboutQt(this, "À propos de Qt");
            });
    connect(ui->actionCharger_depuis_une_image, &QAction::triggered, this, [this](bool)
            {
                load_from_image();
            });

    ui->struct_library->update_cell_pixel_size(ui->grid_view->cell_screen_size());

    load_model(default_model());

    connect(timer, &QTimer::timeout, this, [this](){
        on_nextButton_clicked();
        timer->start();
    });
}

MainWindow::~MainWindow()
{
    delete ui;
    // FIXME : il y a un risque de fuite de mémoire avec la gestion de pointeurs de m_transition_rule et m_neighborhood_rule, si l'application est quitée alors que ils pointent vers de la mémoire non transférée vers Simulation
}

/// Connections

void MainWindow::on_simSpeedSpinbox_valueChanged(int arg1)
{
    ui->simSpeedSlider->setValue(arg1);
}

void MainWindow::on_simSpeedSlider_valueChanged(int value)
{
    ui->simSpeedSpinbox->setValue(value);
}

void MainWindow::on_openPatternButton_clicked()
{
    load_grid_configuration();
}

void MainWindow::on_openRuleButton_clicked()
{
    // Indiquer qu'une nouvelle règle vient d'être ouverte. La règle est sauvegardé, donc on peut lancer la simulation

    ModelLoadingDialog dialog(this);
    if (!dialog.exec())
        return;

    load_model(dialog.model());
}

void MainWindow::on_neighborhood_list_currentTextChanged(const QString &)
{
    update_neighborhood_settings();
}

void MainWindow::on_widthSpinBox_valueChanged(int)
{
    ui->validateGridDim->setEnabled(true);
}

void MainWindow::on_heightSpinBox_valueChanged(int)
{
    ui->validateGridDim->setEnabled(true);
}

QString MainWindow::afficher_interface_sauvegarde_structure()
{
    SavingDialog dialog(this);
    if (!dialog.exec())
        return "";

    QString filename = QFileDialog::getSaveFileName(this, "Choisir un nom de fichier", "", "Format Cellulut (*.json);;Format Golly RLE (*.rle)");
    QFileInfo info(filename);
    //printf("%s\n", info.suffix().toStdString().c_str());
    // on pourrait utiliser un Factory ici, mais c'est possiblement overkill, les possibilités d'évolution de format de fichier sont faibles et ne justifient pas l'effort

    Structure s = ui->grid_view->selected_cells();
    s.author = dialog.auteur().toStdString();
    s.title = dialog.titre().toStdString();
    s.desc = dialog.desc().toStdString();
    s.date = dialog.date().toString().toStdString();

    std::string save_data;
    if (info.suffix() == "json")
    {
        JSONStructureWriter writer;
        save_data = writer.save_structure(s);
    }
    else if (info.suffix() == "rle")
    {
        RLEStructureWriter writer;
        save_data = writer.save_structure(s);
    }

    QFile file(filename);
    if (!file.open(QIODevice::WriteOnly))
    {
        QMessageBox::information(this, "Impossible de créer le fichier",
                                 file.errorString());
        return "";
    }

    QTextStream stream(&file);
    stream << QString::fromStdString(save_data);

    return filename;
}


void MainWindow::on_validateGridDim_clicked()
{
    Grid oldGrid = ui->grid_view->get_grid();


    unsigned int nbrRow = ui->heightSpinBox->value(); // nbr de lignes => axe y
    unsigned int nbrCol = ui->widthSpinBox->value(); // nbr de colonne => axe x
    Grid newGrid(nbrRow, nbrCol);

    unsigned oldNbrRow = oldGrid.get_rows(); // rows = nbr de lignes => axe y
    unsigned oldNbrCol = oldGrid.get_col(); // col = nbr de colonne => axe x

    if(oldNbrRow <= nbrRow && oldNbrCol <= nbrCol) {
        //std::cout << "superieur\n";
        fflush(stdout);
        for (unsigned y = 0; y < oldNbrRow ; y++) {
            for (unsigned x = 0; x < oldNbrCol ; x++) {
                Coord pos = {static_cast<int>(x), static_cast<int>(y)};
                newGrid.set_cell(pos, oldGrid.get_state(pos));
                //std::cout << "oldState : " << oldGrid.get_state(pos) << endl;
            }
        }
    }
    else
    {
        //std::cout << "superieur\n";
        fflush(stdout);
        for (unsigned y = 0; y < nbrRow ; y++) {
            for (unsigned x = 0; x < nbrCol ; x++) {
                Coord pos = {static_cast<int>(x), static_cast<int>(y)};
                newGrid.set_cell(pos, oldGrid.get_state(pos));
                //std::cout << "oldState : " << oldGrid.get_state(pos) << endl;
            }
        }
    }

    ui->grid_view->copy_grid(newGrid);

    ui->validateGridDim->setEnabled(false);
}

void MainWindow::on_nbrStateComboBox_currentTextChanged(const QString &arg1)
{
    unsigned val = arg1.toInt();

    ui->grid_view->set_current_pen(val);
}

void MainWindow::on_randomPatternButton_clicked()
{
    int alphabetSize = simulation.getAlphabet().taille();

    Grid oldGrid = ui->grid_view->get_grid();
    unsigned nbrRow = oldGrid.get_rows(); // rows = nbr de lignes => axe y
    unsigned nbrCol = oldGrid.get_col(); // col = nbr de colonne => axe x
    Grid newGrid(nbrRow, nbrCol);

    for (unsigned y = 0; y < nbrRow; ++y)
    {
        for (unsigned x = 0; x < nbrCol; ++x)
        {
            unsigned state = rand() % alphabetSize;
            Coord pos = {static_cast<int>(x), static_cast<int>(y)};
            newGrid.set_cell(pos, state);
        }
    }

    ui->grid_view->copy_grid(newGrid);
}

void MainWindow::on_nbrStatesComboBox_currentTextChanged(const QString &arg1)
{
    // A mettre dans la fonction valider
    /*
    // Nombre d'états possibles
    int val = arg1.toInt();
    // Nombre de valeurs dans le comboxBox (en partant de 0)
    int currentNbrValue = ui->nbrStateComboBox->count();
    // Si on change le nbr d'états
    if (val != currentNbrValue) {
        // Si on ajoute des états
        if (val > currentNbrValue) {
            for(int i = currentNbrValue; i < val; i++ ) {
                ui->nbrStateComboBox->addItem(QString::number(i));
            }
        }
        // Si on retire des états
        else {
            for(int i = currentNbrValue - 1; i >= val; i-- ) {
                ui->nbrStateComboBox->removeItem(i);
            }
        }
    }
    */
}

void MainWindow::on_drawCellButton_clicked()
{
    ui->grid_view->fill_selection(ui->nbrStateComboBox->currentIndex());
}

void MainWindow::copy_structure_clicked(const Structure &s)
{
    ui->grid_view->set_clipboard(s);
    statusBar()->showMessage("Structure copied.", 5000);
}

void MainWindow::init_transition_neighborhood_list()
{
    for (const auto& transition : Factory<TransitionRule>::list_choices())
    {
        ui->transition_list->addItem(QString::fromStdString(transition));
    }

    for (const auto& rule : Factory<NeighborhoodRule>::list_choices())
    {
        ui->neighborhood_list->addItem(QString::fromStdString(rule));
    }
}

void MainWindow::update_transition_settings()
{
    std::string selected = ui->transition_list->currentText().toStdString();
    m_transition_rule = Factory<TransitionRule>::make(selected).release();
    if (!m_transition_rule)
        return;

    if (m_transition_rule->get_properties().size() == 0)
        ui->rule_settings_area->hide();
    else
    {
        ui->rule_settings_area->show();

        UIBuilderVisitor visit(ui->rule_settings_area);
        for (auto& prop : m_transition_rule->get_properties())
            prop->accept(visit);
    }
}
void MainWindow::update_neighborhood_settings()
{
    std::string selected = ui->neighborhood_list->currentText().toStdString();
    m_neighborhood_rule = Factory<NeighborhoodRule>::make(selected).release();
    if (!m_neighborhood_rule)
        return;

    if (m_neighborhood_rule->get_properties().size() == 0)
        ui->neighborhood_settings_area->hide();
    else
    {
        ui->neighborhood_settings_area->show();

        UIBuilderVisitor visit(ui->neighborhood_settings_area);
        for (auto& prop : m_neighborhood_rule->get_properties())
            prop->accept(visit);
    }
}

void MainWindow::enable_rule_customization()
{
    ui->simulation_tab->setEnabled(false);
    ui->customize_button->setText("Cancel customization");
    ui->rule_settings->setEnabled(true);
    m_customizing = true;
}

void MainWindow::disable_rule_customization()
{
    ui->simulation_tab->setEnabled(true);
    ui->customize_button->setEnabled(true);
    ui->rule_settings->setEnabled(false);
    ui->customize_button->setText("Customize...");
    m_customizing = false;
}

void MainWindow::load_model(const QJsonObject &obj)
{
    ui->rule_name->setText(obj.value("title").toString());

    ui->transition_list->setCurrentText(obj.value("transition_name").toString());
    ui->neighborhood_list->setCurrentText(obj.value("neighborhood_name").toString());

    bool alpha_initialise = false;
    Alphabet alpha;
    if (obj.value("alphabet").isArray())
    {
        for (auto entry : obj.value("alphabet").toArray())
        {
            if (!entry.isObject())
                continue;

            auto entry_obj = entry.toObject();
            std::string name = entry_obj.value("name").toString().toStdString();

            if (!entry_obj.value("color").isArray())
                continue;

            auto color_array = entry_obj.value("color").toArray();
            stateColor color(color_array[0].toInt(), color_array[1].toInt(), color_array[2].toInt());

            // Initialisation avec le premier élement
            if (!alpha_initialise)
            {
                alpha = Alphabet(state(color, name));
                alpha_initialise = true;
            }
            else
                alpha.newEtat(state(color, name));
        }
    }


    update_transition_settings();
    update_neighborhood_settings();
    disable_rule_customization();

    {
        PropertyLoaderVisitor loader(obj.value("transition_data").toObject());
        for (auto& prop : m_transition_rule->get_properties())
            prop->accept(loader);
        UIBuilderVisitor visit(ui->rule_settings_area);
        for (auto& prop : m_transition_rule->get_properties())
            prop->accept(visit);
    }

    {
        PropertyLoaderVisitor loader(obj.value("neighborhood_data").toObject());
        for (auto& prop : m_neighborhood_rule->get_properties())
            prop->accept(loader);
        UIBuilderVisitor visit(ui->neighborhood_settings_area);
        for (auto& prop : m_neighborhood_rule->get_properties())
            prop->accept(visit);
    }

    ui_update_alphabet(alpha);

    // On transfère la propriété de ces pointeurs vers Simulation, qui en est désormais propriétaire pour l'exécution de l'automate
    simulation.setNeighborhoodRule(m_neighborhood_rule);
    simulation.setTransitionRule(m_transition_rule);
    simulation.setAlphabet(alpha);

    m_loaded_model = obj;
}

void MainWindow::save_model()
{
    SavingDialog dialog(this);
    if (!dialog.exec())
        return;

    QString filename = QFileDialog::getSaveFileName(this, "Choisir un nom de fichier", QString(), "Modèle d'automate (*.json)");

    PropertySaverVisitor trans_saver;
    for (auto& prop : m_transition_rule->get_properties())
        prop->accept(trans_saver);

    PropertySaverVisitor neighborhood_saver;
    for (auto& prop : m_neighborhood_rule->get_properties())
        prop->accept(neighborhood_saver);

    QJsonObject root;
    root["title"] = dialog.titre();
    root["author"] = dialog.auteur();
    root["desc"] = dialog.desc();
    root["date"] = dialog.date().toString();

    root["transition_name"] = ui->transition_list->currentText();
    root["transition_data"] = trans_saver.save();

    root["neighborhood_name"] = ui->neighborhood_list->currentText();
    root["neighborhood_data"] = neighborhood_saver.save();

    QJsonArray alphabet;

    for (unsigned i = 0; i < simulation.getAlphabet().taille(); ++i)
    {
        auto state = simulation.getAlphabet().getState(i);
        QJsonArray color;
        QJsonObject entry;
        entry["name"] = QString::fromStdString(state.getStateLabel());
        color.push_back(state.getColor().getRed());
        color.push_back(state.getColor().getGreen());
        color.push_back(state.getColor().getBlue());
        entry["color"] = color;
        alphabet.push_back(entry);
    }

    root["alphabet"] = alphabet;

    QJsonDocument doc(root);
    QFile file(filename);
    if (!file.open(QFile::WriteOnly | QFile::Text | QFile::Truncate))
    {
        QMessageBox::information(this, "Impossible de créer le fichier",
                                 file.errorString());
    }
    file.write(doc.toJson());
    file.close();

    ui->rule_name->setText(dialog.titre());
    disable_rule_customization();

    load_model(root);
}

static unsigned closest_state(const Alphabet& alph, const QColor& color)
{
    unsigned best_distance = std::numeric_limits<unsigned>::max();
    unsigned best_match = 0;
    for (unsigned i = 0; i < alph.taille(); ++i)
    {
        state s = alph.getState(i);
        unsigned r_diff = qAbs(color.red() - s.getColor().getRed());
        unsigned g_diff = qAbs(color.green() - s.getColor().getGreen());
        unsigned b_diff = qAbs(color.blue() - s.getColor().getBlue());
        unsigned distance = r_diff*r_diff + g_diff*g_diff + b_diff*b_diff;
        if (distance < best_distance)
        {
            best_distance = distance;
            best_match = i;
        }
    }

    return best_match;
}

void MainWindow::load_from_image()
{
    QString fileName = QFileDialog::getOpenFileName(this, tr("Open File"),"",tr("Image (*.png *.jpg *.jpeg *.bmp *.gif)"));
    QImage img(fileName);
    if (img.isNull())
        return;

    Grid grid = ui->grid_view->get_grid();

    img = img.scaled(grid.get_col(),
                     grid.get_rows());
    for (int x = 0; x < img.width(); ++x)
        for (int y = 0; y < img.height(); ++y)
        {
            unsigned closest = closest_state(ui->grid_view->alphabet(), img.pixelColor(x, y));
            grid.set_cell(Coord{x, y}, closest);
        }

    ui->grid_view->copy_grid(grid);
}

void MainWindow::ui_update_alphabet(const Alphabet &alpha)
{
    ui->grid_view->set_alphabet(alpha);
    ui->nbrStateComboBox->clear();
    for (unsigned i = 0; i < alpha.taille(); ++i)
        ui->nbrStateComboBox->addItem(QString::number(i));
    ui->nbrStatesComboBox->clear();
    ui->nbrStatesComboBox->addItem(QString::number(alpha.taille()));
}

void MainWindow::save_grid_configuration()
{
    const Grid& grid = ui->grid_view->get_grid();
    Structure grid_data = grid.to_structure();

    QString title = QInputDialog::getText(this, "Choisir un titre", "Titre de la configuration : ");
    if (title.isEmpty())
        return;

    RLEStructureWriter writer;
    std::string structure_data = writer.save_structure(grid_data);

    QJsonObject json_data;
    json_data["width"] = (int)grid.get_col();
    json_data["height"] = (int)grid.get_rows();
    json_data["title"] = title;
    json_data["model"] = m_loaded_model.value("title");
    json_data["left"] = grid_data.top_left.x;
    json_data["top"] = grid_data.top_left.y;
    json_data["data"] = QString::fromStdString(structure_data);

    QString filename = QFileDialog::getSaveFileName(this, "Choisir un nom de fichier", "", "Configuration Cellulut (*.json)");
    if (filename.isEmpty())
        return;

    QFile file(filename);
    if (!file.open(QIODevice::WriteOnly | QFile::Text | QFile::Truncate))
    {
        QMessageBox::information(this, "Impossible de créer le fichier",
                                 file.errorString());
    }

    QJsonDocument doc(json_data);
    file.write(doc.toJson());
    file.close();
}

void MainWindow::load_grid_configuration()
{
    ConfigurationLoadingDialog dialog(m_loaded_model.value("title").toString(), this);
    if (!dialog.exec())
        return;

    Grid g(dialog.configuration().value("width").toInt(10),
           dialog.configuration().value("height").toInt(10));
    Coord origin;
    origin.x = dialog.configuration().value("left").toInt(0);
    origin.y = dialog.configuration().value("top").toInt(0);

    RLEStructureReader reader(dialog.configuration().value("data").toString().toStdString());
    Structure s = reader.read_structure();

    ui->grid_view->copy_grid(g);
    ui->grid_view->paste_structure_at(origin, s);
    ui->widthSpinBox->setValue(g.get_col());
    ui->heightSpinBox->setValue(g.get_rows());
}

QJsonObject MainWindow::default_model() const
{
    const char* json = R"(
    {
        "title" : "Game of Life",
        "transition_name" : "Game of Life",
        "transition_data" : {},
        "alphabet" : [
        {"name" : "Dead", "color" : [255, 255, 255]},
        {"name" : "Alive", "color" : [0, 0, 255]}]
    }
)";

    QJsonDocument doc = QJsonDocument::fromJson(QByteArray(json));

    return doc.object();
}

void MainWindow::on_saveRuleButton_clicked()
{
    save_model();
}

void MainWindow::on_customize_button_clicked()
{
    if (!m_customizing)
    {
        enable_rule_customization();
    }
    else
    {
        disable_rule_customization();
        load_model(m_loaded_model);
    }
}


void MainWindow::on_savePatternButton_clicked()
{
    save_grid_configuration();
}

void MainWindow::on_nextButton_clicked()
{
    simulation.setGrid(ui->grid_view->get_grid());
    simulation.step();
    ui->grid_view->copy_grid(simulation.getGrid());
}

void MainWindow::on_prevButton_clicked()
{
    if(!simulation.back()) {
        QMessageBox::critical(this, "Retour arrière impossible", "L'historique est vide : impossible de revenir en arrière.");
    }
    ui->grid_view->copy_grid(simulation.getGrid());
}

void MainWindow::on_playPauseButton_clicked()
{
    if(timer->isActive()) {
        //Pause
        timer->stop();
    } else {
        //Play
        int frequence = ui->simSpeedSpinbox->value();
        if(frequence == 0) {
            QMessageBox::critical(this, "Impossible de démarrer", "Impossible de lancer la simulation à une vitesse nulle.");
        } else if(!simulation.runnable()) {
            QMessageBox::critical(this, "Impossible de démarrer", "Impossible de lancer la simulation : les règles ne sont pas définies ou incompatibles.");
        } else {
            timer->setInterval(1000/frequence);
            timer->start();
        }
    }
}

void MainWindow::on_resetButton_clicked() {
    if(timer->isActive()) {
        timer->stop();
    }
    simulation.reset();
    ui->grid_view->copy_grid(simulation.getGrid());
}