As3 How to flip a movieclip to face movement direction? - actionscript-3

Question

Working on a maze game. When the leftkey is pressed the movieclip (char) should turn 90 degrees to the left.
Correct me if i'm wrong but I thought I could use this code;
char.scaleX *= -1;
However, the most important thing is that the character doesnt go through the walls of the maze.
And I think thats my problem for implementing the code above.
Because it doesnt work properly when i put in here;
if(!mazehit) {
char.y += speed;
char.scaleX *= -1;
}
My question to you is, where do I have to put the code to flip the movieclip?
var leftArrow, rightArrow, upArrow, downArrow:Boolean;
var speed:Number = 4;
var charRadius:Number = 10;
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
stage.addEventListener(KeyboardEvent.KEY_UP, keyReleased);
stage.addEventListener(Event.ENTER_FRAME, everyFrame);
function keyPressed(event:KeyboardEvent):void {
if (event.keyCode == Keyboard.LEFT) {
leftArrow = true;
}
if (event.keyCode == Keyboard.RIGHT) {
rightArrow = true;
}
if (event.keyCode == Keyboard.UP) {
upArrow = true;
}
if (event.keyCode == Keyboard.DOWN) {
downArrow = true;
}
}
function keyReleased(event:KeyboardEvent):void {
if (event.keyCode == Keyboard.LEFT) {
leftArrow = false;
}
if (event.keyCode == Keyboard.RIGHT) {
rightArrow = false;
}
if (event.keyCode == Keyboard.UP) {
upArrow = false;
}
if (event.keyCode == Keyboard.DOWN) {
downArrow = false;
}
}
function everyFrame(event:Event):void {
var mazehit:Boolean = false;
if (leftArrow) {
for(var i:int = 0; i < speed; i++) {
if(bounds.hitTestPoint(char.x - charRadius - i, char.y, true)) {
mazehit = true;
break;
}
}
if(!mazehit) {
char.x -= speed;
}
} else if (rightArrow) {
for(var j:int = 0; j < speed; j++) {
if(bounds.hitTestPoint(char.x + charRadius + j, char.y, true)) {
mazehit = true;
break;
}
}
if(!mazehit) {
char.x += speed;
}
} else if (upArrow) {
for(var k:int = 0; k < speed; k++) {
if(bounds.hitTestPoint(char.x, char.y - charRadius - k, true)) {
mazehit = true;
break;
}
}
if(!mazehit) {
char.y -= speed;
}
} else if (downArrow) {
for(var m:int = 0; m < speed; m++) {
if(bounds.hitTestPoint(char.x, char.y + charRadius + m, true)) {
mazehit = true;
break;
}
}
if(!mazehit) {
char.y += speed;
}
}
}
thank you for your time

Answer 1

I would update the direction depending on the speed:
char.scaleX = (speed > 0) ? 1 : -1;
Or, by the keys that have been pressed:
if(keyLeft && !keyRight)
{
char.scaleX = -1;
}
else if(keyRight && !keyLeft)
{
char.scaleX = 1;
}
else
{
// keep current direction
}