var midiout = document.getElementById("midiOutput");
var value;

var setWahPos = function(pos) {

  /*
  if(midiout.checkOutputIdx() == "false"){ //MIDI OUTが設定されているか？
    return;
  }
  */

  //wah.frequency.value = 400 + 3000 * pos;
  value = 127 * pos;
  setTimeout(function(){
    $("#log").html(pos.toFixed(4));
  },1);
  midiout.sendRawMessage([0xb1, 1, value]);
}
//setWahPos(1.0);

var Pedaler = function(callback) {
    var self = this;
    window.addEventListener("deviceorientation", function(e){
        if (e.alpha) {
            self.setAngle(e.alpha, e.beta, e.gamma);
        }
    });
    this.angle = 0;
    this.callback = callback;
}

Pedaler.prototype.setAngle = function(alpha, beta, gamma) {
    var angle = (beta + 20) / 40;
    if (angle < 0.0)
        angle = 0.0;
    else if (angle > 1.0)
        angle = 1.0;

    this.angle = angle;
    if (this.callback)
        this.callback(this.angle);
}

$(function() {
    var pedaler = new Pedaler(function(a) {
        setWahPos(a);
    });
})


//DEBUG

/*
$("#btnTest").click(function(){
  setWahPos(0.5);
});
*/


/*
$("#messagelog").css("display","block");
function loglog(v){$("#messagelog").prepend("<div>" + v + "</div>")}
window.onerror=function(msg, file, line, column, err) {
    $("#messagelog").prepend("<div>" + msg + ":F[" + file + "]L[" + line + ']C[' + column +']e[' + err + "]</div>");
};
loglog("log");
*/