/*
  Glitch Shoes - first test code
  Multi-mode moving LED light pattern
 
  Author:	Jon Jennings
		http://jonjennings.org/
  Date:		November 2011
  Licence:	This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
		http://creativecommons.org/licenses/by-sa/3.0/
 */

// Define the pins that we're using for our hardware
int pin1 = 9;
int pin2 = 10;
int pin3 = 11;
int pin4 = 3;
int pinButton = 12;

// Some constants for adjusting the speed of the effects
int speed = 150;
int speed2 = 150;
int flashDelay = 40;

// Ignore button presses within one second of the previous press
int debounce = 1000;

// The current effects mode
int mode = 0;

void setup() {                
  // Be sure the on-board LED is off
  pinMode(13, OUTPUT);     
  digitalWrite(13, 0);

  // Set our LED lines to be outputs 
  pinMode(pin1, OUTPUT);     
  pinMode(pin2, OUTPUT);     
  pinMode(pin3, OUTPUT);     
  pinMode(pin4, OUTPUT);     
  
  // And configure our mode-switching button
  pinMode(pinButton, INPUT);
  digitalWrite(pinButton, HIGH);
  
  // Turn on the serial port for debug text
  Serial.begin(9600);
}

// Main program loop
void loop() {

  // If the button is down, then step to the next effects mode
  if (buttonPressed()) {
    mode = mode + 1;
  }

  Serial.println(mode); // Debug trace
  
  // Call a specific function depending on what effects mode we're in
  switch (mode) {
    case 0:
      ledWave(0);  // Lights move one way
      break;
    case 1:
      ledWave(1);  // Lights move the other way
      break;
    case 2:
      ledWave(0);  // Lights move back & forth
      ledWave(1);
      break;
    case 3:
      ledFlash();  // Flash all the lights
      break;
    default:
      mode = 0;    // We've reached a mode that doesn't exist so reset back to 0
      break;
  }
} // end of the loop()


// Is the button pressed?
bool buttonPressed() {
  static unsigned long lastPressTime = 0;

  // Do a bit of time checking to make sure we don't count a double-bounce
  // as two button presses
  if ((digitalRead(pinButton) == LOW) &&
      millis() > (lastPressTime + debounce)) {
    lastPressTime = millis();
    return (true);  // button is pressed
  } else {
    return (false);  // button isn't pressed
  }
}
  

// A simple flash: all the lights off, pause, all the lights on, pause
void ledFlash() {
  digitalWrite(pin1, LOW);
  digitalWrite(pin2, LOW);
  digitalWrite(pin3, LOW);
  digitalWrite(pin4, LOW);
  delay(flashDelay);
  digitalWrite(pin1, HIGH);
  digitalWrite(pin2, HIGH);
  digitalWrite(pin3, HIGH);
  digitalWrite(pin4, HIGH);
  delay(flashDelay);
}  


// A simple wave of light: turn on each light in turn with a pause between each
// Go up the line or down the line depending on the parameter
void ledWave(int direction) {

  if (direction == 0)
  {
    digitalWrite(pin1, HIGH);
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, LOW);
    digitalWrite(pin4, LOW);
    delay(speed);
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, HIGH);
    digitalWrite(pin3, LOW);
    digitalWrite(pin4, LOW);
    delay(speed);
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, HIGH);
    digitalWrite(pin4, LOW);
    delay(speed);             
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, LOW);
    digitalWrite(pin4, HIGH);
    delay(speed);
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, LOW);
    digitalWrite(pin4, LOW);
  }  else {
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, LOW);
    digitalWrite(pin4, HIGH);
    delay(speed);           
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, HIGH);
    digitalWrite(pin4, LOW);
    delay(speed);            
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, HIGH); 
    digitalWrite(pin3, LOW);
    digitalWrite(pin4, LOW);
    delay(speed);            
    digitalWrite(pin1, HIGH); 
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, LOW);
    digitalWrite(pin3, LOW);
    delay(speed);            
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, LOW);
    digitalWrite(pin4, LOW);
  }
  delay(speed2);
}