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#include <SNESpad.h>

// put your own strobe/clock/data pin numbers here -- see the pinout in readme.txt
SNESpad nintendo = SNESpad(2,3,4);

int state = 0;

/* A button gets marked as true as soon as it is pressed. That way
 we know to not "press" it again */
boolean a = false; // A Button
boolean b = false; // B Button
boolean x = false; // X Button
boolean y = false; // Y Button
boolean l = false; // L button
boolean r = false; // R button
boolean e = false; // Select Button
boolean s = false; // Start Button
boolean u = false; // Up Button
boolean d = false; // Down Button
boolean f = false; // Left Button
boolean i = false; // Right Button

/* We will pass on this array whenever a key is released. Once the
 key is released we will turn that 0 into a 1. That way in our java program
 we will know exactly which keys we just released. The keys will always go
 in this order:	  a,b,x,y, l,r,e,s up,down,left,right */
int keysReleased[] = {
  0,0,0,0, 0,0,0,0, 0,0,0,0};

/* We will set this to true only when a button has been released. This will
 stop us from sending the keysReleased array every loop to our java robot */
boolean isReleased = false;

void setup() {
  Serial.begin(115200);
  pinMode(13, OUTPUT);
}

void loop() {
  state = nintendo.buttons();

  // Activity LED on pin 13
  if (state != 0) {
    digitalWrite(13, HIGH);
  } else {
    digitalWrite(13, LOW);
  }

  // A
  if (state & SNES_A) {
    if (!a) {
	a = true; // Make sure the button is only pressed once
	Serial.println('A'); // Print the button to be picked up by our robot
    }
  } else if (a == true) { // Key might have been released so we check and if so change the
    a = false;            // value in our released array
    keysReleased[0] = 1;
    isReleased = true;
  }

  // B
  if (state & SNES_B) {
    if (!b) {
	b = true; // Make sure the button is only pressed once
	Serial.println('B'); // Print the button to be picked up by our robot
    }
  } else if (b == true) { // Key might have been released so we check and if so change the
    b = false;            // value in our released array
    keysReleased[1] = 1;
    isReleased = true;
  }

  // X
  if (state & SNES_X) {
    if (!x) {
	x = true; // Make sure the button is only pressed once
	Serial.println('X'); // Print the button to be picked up by our robot
    }
  } else if (x == true) { // Key might have been released so we check and if so change the
    x = false;            // value in our released array
    keysReleased[2] = 1;
    isReleased = true;
  }

  // Y
  if (state & SNES_Y) {
    if (!y) {
	y = true; // Make sure the button is only pressed once
	Serial.println('Y'); // Print the button to be picked up by our robot
    }
  } else if (y == true) { // Key might have been released so we check and if so change the
    y = false;            // value in our released array
    keysReleased[3] = 1;
    isReleased = true;
  }

  // L
  if (state & SNES_L) {
    if (!l) {
	l = true; // Make sure the button is only pressed once
	Serial.println('L'); // Print the button to be picked up by our robot
    }
  } else if (l == true) { // Key might have been released so we check and if so change the
    l = false;            // value in our released array
    keysReleased[4] = 1;
    isReleased = true;
  }

  // R
  if (state & SNES_R) {
    if (!r) {
	r = true; // Make sure the button is only pressed once
	Serial.println('R'); // Print the button to be picked up by our robot
    }
  } else if (r == true) { // Key might have been released so we check and if so change the
    r = false;            // value in our released array
    keysReleased[5] = 1;
    isReleased = true;
  }

  // Select
  if (state & SNES_SELECT) {
    if (!e) {
	e = true; // Make sure the button is only pressed once
	Serial.println('E'); // Print the button to be picked up by our robot
    }
  } else if (e == true) { // Key might have been released so we check and if so change the
    e = false;            // value in our released array
    keysReleased[6] = 1;
    isReleased = true;
  }

  // Start
  if (state & SNES_START) {
    if (!s) {
	s = true; // Make sure the button is only pressed once
	Serial.println('S'); // Print the button to be picked up by our robot
    }
  } else if (s == true) { // Key might have been released so we check and if so change the
    s = false;            // value in our released array
    keysReleased[7] = 1;
    isReleased = true;
  }

  // Up
  if (state & SNES_UP) {
    if (!u) {
	u = true; // Make sure the button is only pressed once
	Serial.println('U'); // Print the button to be picked up by our robot
    }
  } else if (u == true) { // Key might have been released so we check and if so change the
    u = false;            // value in our released array
    keysReleased[8] = 1;
    isReleased = true;
  }

  // Down
  if (state & SNES_DOWN) {
    if (!d) {
	d = true; // Make sure the button is only pressed once
	Serial.println('D'); // Print the button to be picked up by our robot
    }
  } else if (d == true) { // Key might have been released so we check and if so change the
    d = false;            // value in our released array
    keysReleased[9] = 1;
    isReleased = true;
  }

  // Left
  if (state & SNES_LEFT) {
    if (!f) {
      f = true; // Make sure the button is only pressed once
      Serial.println('F'); // Print the button to be picked up by our robot
    }
  } else if (f == true) { // Key might have been released so we check and if so change the
    f = false;            // value in our released array
    keysReleased[10] = 1;
    isReleased = true;
  }

  // Right
  if (state & SNES_RIGHT) {
    if (!i) {
      i = true; // Make sure the button is only pressed once
      Serial.println('I'); // Print the button to be picked up by our robot
    }
  } else if (i == true) { // Key might have been released so we check and if so change the
    i = false;            // value in our released array
    keysReleased[11] = 1;
    isReleased = true;
  } /* If a key has been released then our java robot needs to know about it. So what we
   are going to do is to iterate over our array if a key has been released and print out the
   position in the array of that key. So for example if "Up" has been released we will
   see that our array looks like this [0,0,1,0, 0,0,0,0]. So then we will print 2 to the java robot
   so it knows that "Up" has been released. Likewise we would print 7 for the start button on release. */
  if (isReleased) {
    isReleased = false; // Reset the boolean
    for (int i = 0; i < 12; i++){
      if (keysReleased[i] == 1) {
        keysReleased[i] = 0; // Reset the button listener
		if (i < 10) { 
          Serial.println(i);
		} else if (i == 10) {
		  Serial.println("-");
		} else {
		  Serial.println("=");
		}
      }
    }
  }
  delay(1);
}