var eb = require("./expansion-board.js"),
  five = eb.five;

var board = new five.Board();

board.on("ready", function() {
	/*

    This assumes the segments are as follows:

       A
      ---
    F | | B
      --- <---- G
    E | | C
      ---
       D  o DP

	*/

	var isCommonAnode = true;
  var digits = [
		//        .GFEDCBA
		parseInt("00111111", 2),
		parseInt("00000110", 2),
		parseInt("01011011", 2),
		parseInt("01001111", 2),
		parseInt("01100110", 2),
		parseInt("01101101", 2),
		parseInt("01111101", 2),
		parseInt("00000111", 2),
		parseInt("01111111", 2),
		parseInt("01101111", 2),
		];

  var segments = {
      //           .GFEDCBA
      a: parseInt("00000001", 2),
      b: parseInt("00000010", 2),
      c: parseInt("00000100", 2),
      d: parseInt("00001000", 2),
      e: parseInt("00010000", 2),
      f: parseInt("00100000", 2),
      g: parseInt("01000000", 2),
      dp: parseInt("10000000", 2)
  };
  var piezo = new five.Piezo(3);
  piezo.noTone()
  var register = new five.ShiftRegister({
	  pins: {
	      data: 8,
	      clock: 7,
	      latch: 4
	  }
      });


  function invert(num) {
      return ((~num << 24) >> 24) & 255;
  }

  function digit(num) {
      clear();

      register.send(
		    isCommonAnode ? invert(digits[num]) : digits[num]
		    );
  }

  function segment(s) {
      clear();

      register.send(
		    isCommonAnode ? invert(segments[s]) : segments[s]
		    );
  }

  function clear() {
      register.send(
		    isCommonAnode ? 255 : 0
		    );
  }

  var i = 9;

  function next() {

      digit(i--);

      if (i < 0) {
	  i = 9;
	  setTimeout(next, 2000);
      } else {
	  setTimeout(next, 1000);
      }
  }

  //next();
  segment("a");
  
    });