//These variables will note which keys are down
//We don't need the up or down key just yet
//but we will later

var leftKeyDown:Boolean = false;
var upKeyDown:Boolean = false;
var rightKeyDown:Boolean = false;
var downKeyDown:Boolean = false;
//the main speed of the character
var mainSpeed:Number = 7;
trace("variables are good");


//adding a listener to mcMain which will make it move
//based on the key strokes that are down

main_mc.addEventListener(Event.ENTER_FRAME, moveChar);
function moveChar(event:Event):void{
    //if certain keys are down then move the character
    if (leftKeyDown) {
        main_mc.x -= mainSpeed;
    }
    if (rightKeyDown) {
        main_mc.y += mainSpeed;
    }
    if (upKeyDown || mainJumping) {
    // "||" means OR
        mainJump();
    }
}

trace("moveChar is good");

//listening for the keystrokes
//this listener will listen for down keystrokes
stage.addEventListener(KeyboardEvent.KEY_DOWN, checkKeysDown);
function checkKeysDown(event:KeyboardEvent):void{
    //making the booleans true based on the keycode
    //WASD Keys or arrow keys
    if(event.keyCode == 37 || event.keyCode == 65) {
        leftKeyDown = true;
    }
    if(event.keyCode == 38 || event.keyCode == 87) {
        upKeyDown = true;
    }
    if(event.keyCode == 39 || event.keyCode == 68) {
        rightKeyDown = true;
    }
    if(event.keyCode == 40 || event.keyCode == 83) {
        downKeyDown = true;
    }
}
trace("checkKeysDown is good");

//this listener will listen for keys being released
stage.addEventListener(KeyboardEvent.KEY_UP, checkKeysUp);
function checkKeysUp(event:KeyboardEvent):void{
    //making the booleans false based on the keycode
    if(event.keyCode == 37 || event.keyCode == 65) {
        leftKeyDown = false;
    }
    if(event.keyCode == 38 || event.keyCode == 87) {
        upKeyDown = false;
    }
    if(event.keyCode == 39 || event.keyCode == 68) {
        rightKeyDown = false;
    }
    if(event.keyCode == 40 || event.keyCode == 83) {
        downKeyDown = false;
    }
}
trace("checkKeysUp is good");


//whether or not the main guy is jumping
var mainJumping:Boolean = false;
//how quickly should the jump start off
var jumpSpeedLimit:int = 15;
//the current speed of the jump;
var jumpSpeed:Number = jumpSpeedLimit;
    trace("variables 2 is good");

//jumping function
function mainJump():void{
    //if main isn't already jumping
    if(!mainJumping){
        /*putting an exclamation mark in front of a
        boolean inverts the condition. An exclamation
        means 'not'. This statement says:
        "if not mainJumping". Or rather, "if not true".
        So the results of this statement is false.*/

        //then start jumping
        mainJumping = true;
        jumpSpeed = jumpSpeedLimit*-1;
        main_mc.y += jumpSpeed;
    } else {
        //then continue jumping if already in the air
        //crazy math that I won't explain
        if(jumpSpeed < 0){
            jumpSpeed *= 1 - jumpSpeedLimit/75;
            if(jumpSpeed > -jumpSpeedLimit/5){
                jumpSpeed *= -1;
            }
        }
        if(jumpSpeed > 0 && jumpSpeed <= jumpSpeedLimit) {
            jumpSpeed *= 1 + jumpSpeedLimit/50;
        }
        main_mc.y += jumpSpeed;
        //if main hits the floor, then stop jumping
        //of course, we'll change this once we create the level
        if(main_mc.y >= stage.stageHeight - main_mc.height) {
            mainJumping = false;
            main_mc.y = stage.stageHeight - main_mc.height;
        }
    }
}
trace("mainJump is good");