import gtk.Main;
import gtk.MainWindow;
import gtk.CssProvider;
import gdk.Display;
import gdk.Screen;
import gtk.StyleContext;
import std.path;
import std.stdio;
import std.random;
import std.conv;
import gtk.Button;
import gtk.Grid;
import gdk.Event;
import gtk.Widget;
import glib.ListG;
import glib.Timeout;
import core.thread;

class Window : MainWindow{
    private int level = 1;
    private int[] rndButtonBlink;
    private int[] userInput;
    private Button[4] bArr;
    private int index = 0;
    this(int width, int height, string title, string wd){
        super(title);
        setDefaultSize(width, height);

        Button btn_0 = new Button();
        btn_0.getStyleContext().addClass("green");
        auto call0 = &btn0ClickedEvent;
        btn_0.addOnButtonRelease(call0);

        Button btn_1 = new Button();
        btn_1.getStyleContext().addClass("yellow");
        auto call1 = &btn1ClickedEvent;
        btn_1.addOnButtonRelease(call1);

        Button btn_2 = new Button();
        btn_2.getStyleContext().addClass("blue");
        auto call2 = &btn2ClickedEvent;
        btn_2.addOnButtonRelease(call2);

        Button btn_3 = new Button();
        btn_3.getStyleContext().addClass("red");
        auto call3 = &btn3ClickedEvent;
        btn_3.addOnButtonRelease(call3);

        bArr = [btn_0,btn_1,btn_2,btn_3];

        Grid grid = new Grid();
        grid.setColumnSpacing(2);
        grid.setRowSpacing(2);
        grid.setColumnHomogeneous(true);
        grid.setRowHomogeneous(true);
        grid.attach(btn_0,1,1,1,1);
        grid.attach(btn_1,1,2,1,1);
        grid.attach(btn_2,2,1,1,1);
        grid.attach(btn_3,2,2,1,1);

        string cssPath = dirName(wd) ~ "\\" ~ "SimonSays.css";

        CssProvider provider = new CssProvider();
        provider.loadFromPath(cssPath);

        Display display = Display.getDefault();
        Screen screen = display.getDefaultScreen();
        StyleContext.addProviderForScreen(screen, provider, GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);

        randomizeButtons();
        letButtonsFlash();

        add(grid);
        showAll();
    }
    private void randomizeButtons(){
        rndButtonBlink = new int[level];
        userInput = new int[level];
        userInput.length = 0;
        for(int i = 0; i < level; i++){
            rndButtonBlink[i] = uniform(0,4);
        }
    }
    private void letButtonsFlash(){
        foreach(Button btn;bArr){
            btn.setSensitive(false);
        }
        for(int i = 0; i < level; i++){
            index = i;
            Button currentButton = bArr[rndButtonBlink[i]]; //Array holds randomized Buttons
            ListG list = currentButton.getStyleContext().listClasses();
            string CSSClassName = to!string(cast(char*)list.next().data);
            currentButton.getStyleContext().addClass(CSSClassName ~ "-flash");
            Timeout t = new Timeout(() => this.timeout_delay(currentButton),1,false);
        }

        foreach(Button btn;bArr){
            btn.setSensitive(true);
        }
    }
    bool timeout_delay(Button currentButton){
        ListG list = currentButton.getStyleContext().listClasses();
        string CSSClassName = to!string(cast(char*)list.next().data);
        writeln(CSSClassName); //try to debug
        currentButton.getStyleContext().removeClass(CSSClassName ~ "-flash");
        return false;
    }
    bool btn0ClickedEvent(Event e, Widget widget){
        userInput ~= 0;
        checkForWin();
        return true;
    }
    bool btn1ClickedEvent(Event e, Widget widget){
        userInput ~= 1;
        checkForWin();
        return true;
    }
    bool btn2ClickedEvent(Event e, Widget widget){
        userInput ~= 2;
        checkForWin();
        return true;
    }
    bool btn3ClickedEvent(Event e, Widget widget){
        userInput ~= 3;
        checkForWin();
        return true;
    }
    int checkIfCorrect(){
        writeln("Level: " ~ to!string(level));
        writeln(userInput);
        if(userInput.length > rndButtonBlink.length){
            writeln("UserInput too long");
            return 0;
        }
        if(userInput.length < rndButtonBlink.length){
            return 2;
        }
        if(userInput.length == rndButtonBlink.length){
            for(int i = 0; i < level; i++){
                if(rndButtonBlink[i] != userInput[i])
                    return 0;
            }
        }
        return 1;
    }
    void checkForWin(){
        int val = checkIfCorrect();
        if(val == 0){
            level = 1;
            writeln("Loose!");
            nextRound();
        }
        else if(val == 1){
            level++;
            writeln("Win!");
            nextRound();
        }
    }
    void nextRound(){
        randomizeButtons();
        letButtonsFlash();
    }
}

void main(string[] args){
    Main.init(args);
    auto win = new Window(250,250,"Tutorial", args[0]);
    Main.run();
}

------------------------------------------------------------

Css:
.green{
    background-image:none;
    background-color:green;
}
.yellow{
    background-image:none;
    background-color:yellow;
}
.blue{
    background-image:none;
    background-color:blue;
}
.red{
    background-image:none;
    background-color:red;
}
.green-flash{
    background-image:none;
    background-color:#90EE90;
}
.yellow-flash{
    background-image:none;
    background-color:#FFFFE0;
}
.blue-flash{
    background-image:none;
    background-color:#ADD8E6;
}
.red-flash{
    background-image:none;
    background-color:#FFB6C1;
}