"use strict"

var breite = 4;
var hoehe = 4;
var aktuellerLevel = 1;
var klicks = 0;

// Initializes the game
PS.init = function( system, options ) 
{
    "use strict";

    PS.gridSize( breite, hoehe );
    PS.fade( PS.ALL, PS.ALL, 10 );

    PS.statusText("Farbwechsel");
    aktuellerLevel = 1;
    starteLevel();    
};

function starteLevel()
{   
    for(var i=0; i<aktuellerLevel; i++)
    { 
        var zufallX = PS.random(breite) - 1;
        var zufallY = PS.random(hoehe) - 1;
        feldKlicken( zufallX, zufallY);
    }
    klicks = 0;    
}

// Called when the mouse button is clicked on a bead, or when a bead is touched
PS.touch = function( x, y, data, options ) 
{
    "use strict";

    feldKlicken(x,y);   
    if( levelGeloest() )
    {                                   
        PS.statusText("Level " + aktuellerLevel + " mit " + klicks + " Klicks gelöst!");
        PS.audioPlay("fx_coin1");       
        aktuellerLevel++;
        starteLevel();
    }
    else
    {                        
        PS.statusText(klicks + "/" + aktuellerLevel);
    }
};

function levelGeloest()
{
    for(var x=0 ; x<breite; x++)
    {
        for(var y=0; y<hoehe; y++)
        {
            if( PS.color(x,y) == PS.COLOR_BLACK )
            {
                return false;
            }
        }
    }
    return true;
}


function feldKlicken(x, y)
{
    PS.audioPlay("fx_click");
    farbeWechseln(x, y);
    nachbarFelderWechseln(x, y);
    klicks++;
}

function nachbarFelderWechseln(x, y)
{   
    farbeWechseln(x+1, y); // rechts
    farbeWechseln(x-1, y); // links
    farbeWechseln(x, y+1); // unten
    farbeWechseln(x, y-1); // oben
}


function farbeWechseln(x, y)
{
    if( !aufBrett(x, y) )
    {
        return;
    }                    
    
    if( PS.color(x,y) == PS.COLOR_WHITE )
    {
        PS.color(x, y, PS.COLOR_BLACK);
    }
    else
    {
        PS.color(x, y, PS.COLOR_WHITE);
    }
}

function aufBrett(x, y)
{
    return x >= 0 && x < breite &&
           y >= 0 && y < hoehe;       
}


// Called when the mouse button is released over a bead, or when a touch is lifted off a bead
PS.release = function( x, y, data, options ) {
};

// Called when the mouse/touch enters a bead
PS.enter = function( x, y, data, options ) {
};

// Called when the mouse cursor/touch exits a bead
PS.exit = function( x, y, data, options ) {
};

// Called when the mouse cursor/touch exits the grid perimeter
PS.exitGrid = function( options ) {
};

// PS.keyDown ( key, shift, ctrl, options )
PS.keyDown = function( key, shift, ctrl, options ) {
};

// Called when a key on the keyboard is released
PS.keyUp = function( key, shift, ctrl, options ) {
};

// Called when an input device event (other than mouse/touch/keyboard) is detected
PS.input = function( sensors, options ) {
};