const UI_INITIAL_GUI = 200;
const UI_RELOAD = 201;
const UPDATE_OFFSET = 100;

const UI_EXTEND_GUI = 210;

const UI_TITEL = 0;

const UI_PAD = 1;
const UPDATE_PAD = 101;

const UI_CPAD = 2;
const UPDATE_CPAD = 102;

const UI_BUTTON = 3;
const UPDATE_BUTTON = 103;

const UI_LABEL = 4;
const UPDATE_LABEL = 104;

const UI_SWITCHER = 5;
const UPDATE_SWITCHER = 105;

const UI_SLIDER = 6;
const UPDATE_SLIDER = 106;

const UI_NUMBER = 7;
const UPDATE_NUMBER = 107;

const UI_TEXT_INPUT = 8;
const UPDATE_TEXT_INPUT = 108;

const UI_GRAPH = 9;
const ADD_GRAPH_POINT = 10;
const CLEAR_GRAPH = 109;

const UI_TAB = 11;
const UPDATE_TAB = 111;

const UI_SELECT = 12;
const UPDATE_SELECT = 112;

const UI_OPTION = 13;
const UPDATE_OPTION = 113;
const UI_MIN = 14;
const UPDATE_MIN = 114;
const UI_MAX = 15;
const UPDATE_MAX = 115;
const UI_STEP = 16;
const UPDATE_STEP = 116;

const UI_GAUGE = 17;
const UPDATE_GAUGE = 117;
const UI_ACCEL = 18;
const UPDATE_ACCEL = 118;

const UI_SEPARATOR = 19;
const UPDATE_SEPARATOR = 119;

const UI_TIME = 20;
const UPDATE_TIME = 120;

const UP = 0;
const DOWN = 1;
const LEFT = 2;
const RIGHT = 3;
const CENTER = 4;

// Colors
const C_TURQUOISE = 0;
const C_EMERALD = 1;
const C_PETERRIVER = 2;
const C_WETASPHALT = 3;
const C_SUNFLOWER = 4;
const C_CARROT = 5;
const C_ALIZARIN = 6;
const C_DARK = 7;
const C_NONE = 255;

var graphData = new Array();
var hasAccel = false;
var sliderContinuous = false;

function colorClass(colorId) {
  colorId = Number(colorId);
  switch (colorId) {
    case C_TURQUOISE:
      return "turquoise";

    case C_EMERALD:
      return "emerald";

    case C_PETERRIVER:
      return "peterriver";

    case C_WETASPHALT:
      return "wetasphalt";

    case C_SUNFLOWER:
      return "sunflower";

    case C_CARROT:
      return "carrot";

    case C_ALIZARIN:
      return "alizarin";

    case C_DARK:
    case C_NONE:
      return "dark";
    default:
      return "";
  }
}

var websock;
var websockConnected = false;

function requestOrientationPermission() {
  /*
  // Currently this fails, since it needs secure context on IOS safari
  if (typeof DeviceMotionEvent.requestPermission === "function") {
    DeviceOrientationEvent.requestPermission()
      .then(response => {
        if (response == "granted") {
          window.addEventListener("deviceorientation", handleOrientation);
        }
      })
      .catch(console.error);
  } else {
    // Non IOS 13
    window.addEventListener("deviceorientation", handleOrientation);
  }
  */
}
/*
function handleOrientation(event) {
  var x = event.beta; // In degree in the range [-180,180]
  var y = event.gamma; // In degree in the range [-90,90]

  var output = document.querySelector(".output");
  output.innerHTML = "beta : " + x + "\n";
  output.innerHTML += "gamma: " + y + "\n";

  // Because we don't want to have the device upside down
  // We constrain the x value to the range [-90,90]
  if (x > 90) {
    x = 90;
  }
  if (x < -90) {
    x = -90;
  }

  // To make computation easier we shift the range of
  // x and y to [0,180]
  x += 90;
  y += 90;

  // 10 is half the size of the ball
  // It center the positioning point to the center of the ball
  var ball = document.querySelector(".ball");
  var garden = document.querySelector(".garden");
  var maxX = garden.clientWidth - ball.clientWidth;
  var maxY = garden.clientHeight - ball.clientHeight;
  ball.style.top = (maxY * y) / 180 - 10 + "px";
  ball.style.left = (maxX * x) / 180 - 10 + "px";
}
*/

function saveGraphData() {
  localStorage.setItem("espuigraphs", JSON.stringify(graphData));
}

function restoreGraphData(id) {
  var savedData = localStorage.getItem("espuigraphs", graphData);
  if (savedData != null) {
    savedData = JSON.parse(savedData);
    return savedData[id];
  }
  return [];
}

function restart() {
  $(document).add("*").off();
  $("#row").html("");
  websock.close();
  start();
}

function conStatusError() {
  websockConnected = false;
  $("#conStatus").removeClass("color-green");
  $("#conStatus").addClass("color-red");
  $("#conStatus").html("Error / No Connection &#8635;");
  $("#conStatus").off();
  $("#conStatus").on({
    click: restart,
  });
}

function handleVisibilityChange() {
  if (!websockConnected && !document.hidden) {
    restart();
  }
}

function start() {
  document.addEventListener("visibilitychange", handleVisibilityChange, false);
  if (
    window.location.port != "" ||
    window.location.port != 80 ||
    window.location.port != 443
  ) {
    websock = new WebSocket(
      "ws://" + window.location.hostname + ":" + window.location.port + "/ws"
    );
  } else {
    websock = new WebSocket("ws://" + window.location.hostname + "/ws");
  }
  websock.onopen = function (evt) {
    console.log("websock open");
    $("#conStatus").addClass("color-green");
    $("#conStatus").text("Connected");
    websockConnected = true;
  };

  websock.onclose = function (evt) {
    console.log("websock close");
    conStatusError();
  };

  websock.onerror = function (evt) {
    console.log(evt);
    conStatusError();
  };

  var handleEvent = function (evt) {
    console.log(evt);
    var data = JSON.parse(evt.data);
    var e = document.body;
    var center = "";

    switch (data.type) {
      case UI_INITIAL_GUI:
        // Clear current elements
        $("#row").html("");
        $("#tabsnav").html("");
        $("#tabscontent").html("");

        if (data.sliderContinuous) {
          sliderContinuous = data.sliderContinuous;
        }
        data.controls.forEach(element => {
          var fauxEvent = {
            data: JSON.stringify(element),
          };
          handleEvent(fauxEvent);
        });

        //If there are more elements in the complete UI, then request them
        //Note: we subtract 1 from data.controls.length because the controls always
        //includes the title element
        if(data.totalcontrols > (data.controls.length - 1)) {
          websock.send("uiok:" + (data.controls.length - 1));
        }
        break;

      case UI_EXTEND_GUI:
        data.controls.forEach(element => {
          var fauxEvent = {
            data: JSON.stringify(element),
          };
          handleEvent(fauxEvent);
        });

        //Do we need to keep requesting more UI elements?
        if(data.totalcontrols > data.startindex + (data.controls.length - 1)) {
          websock.send("uiok:" + (data.startindex + (data.controls.length - 1)));
        }
        break;
      
      case UI_RELOAD:
        window.location.reload();
        break;

      case UI_TITEL:
        document.title = data.label;
        $("#mainHeader").html(data.label);
        break;

      /*
        Most elements have the same behaviour when added.
      */
      case UI_LABEL:
      case UI_NUMBER:
      case UI_TEXT_INPUT:
      case UI_SELECT:
      case UI_GAUGE:
      case UI_SEPARATOR:
		    if (data.visible) addToHTML(data);
        break;

      /*
        These elements must call additional functions after being added to the DOM
      */
      case UI_BUTTON:
		    if (data.visible) {
          addToHTML(data);
          $("#btn" + data.id).on({
            touchstart: function (e) {
              e.preventDefault();
              buttonclick(data.id, true);
            },
            touchend: function (e) {
              e.preventDefault();
              buttonclick(data.id, false);
            },
          });
        }
        break;

      case UI_SWITCHER:
		    if (data.visible) {
          addToHTML(data);
          switcher(data.id, data.value);
        }
        break;

      case UI_CPAD:
      case UI_PAD:
		    if (data.visible) {
          addToHTML(data);
          $("#pf" + data.id).on({
            touchstart: function (e) {
              e.preventDefault();
              padclick(UP, data.id, true);
            },
            touchend: function (e) {
              e.preventDefault();
              padclick(UP, data.id, false);
            },
          });
          $("#pl" + data.id).on({
            touchstart: function (e) {
              e.preventDefault();
              padclick(LEFT, data.id, true);
            },
            touchend: function (e) {
              e.preventDefault();
              padclick(LEFT, data.id, false);
            },
          });
          $("#pr" + data.id).on({
            touchstart: function (e) {
              e.preventDefault();
              padclick(RIGHT, data.id, true);
            },
            touchend: function (e) {
              e.preventDefault();
              padclick(RIGHT, data.id, false);
            },
          });
          $("#pb" + data.id).on({
            touchstart: function (e) {
              e.preventDefault();
              padclick(DOWN, data.id, true);
            },
            touchend: function (e) {
              e.preventDefault();
              padclick(DOWN, data.id, false);
            },
          });
          $("#pc" + data.id).on({
            touchstart: function (e) {
              e.preventDefault();
              padclick(CENTER, data.id, true);
            },
            touchend: function (e) {
              e.preventDefault();
              padclick(CENTER, data.id, false);
            },
          });
		    }
        break;

      case UI_SLIDER:
        //https://codepen.io/seanstopnik/pen/CeLqA
		    if (data.visible) {
          addToHTML(data);
          rangeSlider(!sliderContinuous);
        }
        break;

      case UI_TAB:
		    if (data.visible) {
          $("#tabsnav").append(
            "<li><a onmouseup='tabclick(" + data.id + ")' href='#tab" + data.id + "'>" + data.value + "</a></li>"
          );
          $("#tabscontent").append("<div id='tab" + data.id + "'></div>");

          tabs = $(".tabscontent").tabbedContent({ loop: true }).data("api");
          // switch to tab...
          $("a")
            .filter(function () {
              return $(this).attr("href") === "#click-to-switch";
            })
            .on("click", function (e) {
              var tab = prompt("Tab to switch to (number or id)?");
              if (!tabs.switchTab(tab)) {
                alert("That tab does not exist :\\");
              }
              e.preventDefault();
            });
		    }
        break;

      case UI_OPTION:
        if (data.parentControl) {
          var parent = $("#select" + data.parentControl);
          parent.append(
            "<option id='option" +
              data.id +
              "' value='" +
              data.value +
              "' " +
              data.selected +
              ">" +
              data.label +
              "</option>"
          );
        }
        break;

      case UI_MIN:
        if (data.parentControl) {
          var parent = $("#id" + data.parentControl + " input");
          if (parent.size()) {
            parent.attr("min", data.value);
          }
        }
        break;

      case UI_MAX:
        if (data.parentControl) {
          var parent = $("#id" + data.parentControl + " input");
          if (parent.size()) {
            if(!parent.attr("type")) {
              //type is not set so therefore it is a text input
              parent.attr("maxlength", data.value);
            } else {
              //type might be range (slider) or number
              parent.attr("max", data.value);
            }
          }
        }
        break;

      case UI_STEP:
        if (data.parentControl) {
          var parent = $("#id" + data.parentControl + " input");
          if (parent.size()) {
            parent.attr("step", data.value);
          }
        }
        break;

      case UI_GRAPH:
		    if (data.visible) {
          addToHTML(data);
          graphData[data.id] = restoreGraphData(data.id);
          renderGraphSvg(graphData[data.id], "graph" + data.id);
        }
        break;
      case ADD_GRAPH_POINT:
        var ts = Math.round(new Date().getTime() / 1000);
        graphData[data.id].push({ x: ts, y: data.value });
        saveGraphData();
        renderGraphSvg(graphData[data.id], "graph" + data.id);
        break;
      case CLEAR_GRAPH:
        graphData[data.id] = [];
        saveGraphData();
        renderGraphSvg(graphData[data.id], "graph" + data.id);
        break;

      case UI_ACCEL:
        if (hasAccel) break;
        hasAccel = true;
		    if (data.visible) {
          addToHTML(data);
          requestOrientationPermission();
		    }
        break;

      /*
       * Update messages change the value/style of a component without adding new HTML
       */
      case UPDATE_LABEL:
        $("#l" + data.id).html(data.value);
        if(data.hasOwnProperty('elementStyle')) {
          $("#l" + data.id).attr("style", data.elementStyle);
        }
        break;

      case UPDATE_SWITCHER:
        switcher(data.id, data.value == "0" ? 0 : 1);
        if(data.hasOwnProperty('elementStyle')) {
          $("#sl" + data.id).attr("style", data.elementStyle);
        }
        break;

      case UPDATE_SLIDER:
        $("#sl" + data.id).attr("value", data.value)
        slider_move($("#id" + data.id), data.value, "100", false);
        if(data.hasOwnProperty('elementStyle')) {
          $("#sl" + data.id).attr("style", data.elementStyle);
        }
        break;

      case UPDATE_NUMBER:
        $("#num" + data.id).val(data.value);
        if(data.hasOwnProperty('elementStyle')) {
          $("#num" + data.id).attr("style", data.elementStyle);
        }
        break;

      case UPDATE_TEXT_INPUT:
        $("#text" + data.id).val(data.value);
        if(data.hasOwnProperty('elementStyle')) {
          $("#text" + data.id).attr("style", data.elementStyle);
        }
        break;

      case UPDATE_SELECT:
        $("#select" + data.id).val(data.value);
        if(data.hasOwnProperty('elementStyle')) {
          $("#select" + data.id).attr("style", data.elementStyle);
        }
        break;

      case UPDATE_BUTTON:
        $("#btn" + data.id).val(data.value);
        $("#btn" + data.id).text(data.value);
        if(data.hasOwnProperty('elementStyle')) {
          $("#btn" + data.id).attr("style", data.elementStyle);
        }
        break;
      
      case UPDATE_PAD:
      case UPDATE_CPAD:
        break;
      case UPDATE_GAUGE:
        $("#gauge" + data.id).val(data.value);
        if(data.hasOwnProperty('elementStyle')) {
          $("#gauge" + data.id).attr("style", data.elementStyle);
        }
        break;
      case UPDATE_ACCEL:
        break;

      case UPDATE_TIME:
        var rv = new Date().toISOString();
        websock.send("time:" + rv + ":" + data.id);
        break;

      default:
        console.error("Unknown type or event");
        break;
    }

    if (data.type >= UPDATE_OFFSET && data.type < UI_INITIAL_GUI) {
      var element = $("#id" + data.id);

      if(data.hasOwnProperty('panelStyle')) {
        $("#id" + data.id).attr("style", data.panelStyle);
      }

      if(data.hasOwnProperty('visible')) {
        if(data['visible']) 
          $("#id" + data.id).show();
        else
          $("#id" + data.id).hide();
      }

      if (data.type == UPDATE_SLIDER) {
        element.removeClass(
          "slider-turquoise slider-emerald slider-peterriver slider-wetasphalt slider-sunflower slider-carrot slider-alizarin"
        );
        element.addClass("slider-" + colorClass(data.color));
      } else {
        element.removeClass(
          "turquoise emerald peterriver wetasphalt sunflower carrot alizarin"
        );
        element.addClass(colorClass(data.color));
      }
    }

    $(".range-slider__range").each(function(){ 
      $(this)[0].value = $(this).attr("value");
      $(this).next().html($(this).attr("value"));
    });
  };

  websock.onmessage = handleEvent;
}

function sliderchange(number) {
  var val = $("#sl" + number).val();
  websock.send("slvalue:" + val + ":" + number);

  $(".range-slider__range").each(function(){ 
    $(this).attr("value", $(this)[0].value);
  });
}

function numberchange(number) {
  var val = $("#num" + number).val();
  websock.send("nvalue:" + val + ":" + number);
}

function textchange(number) {
  var val = $("#text" + number).val();
  websock.send("tvalue:" + val + ":" + number);
}

function tabclick(number) {
  var val = $("#tab" + number).val();
  websock.send("tabvalue:" + val + ":" + number);
}

function selectchange(number) {
  var val = $("#select" + number).val();
  websock.send("svalue:" + val + ":" + number);
}

function buttonclick(number, isdown) {
  if (isdown) websock.send("bdown:" + number);
  else websock.send("bup:" + number);
}

function padclick(type, number, isdown) {
  switch (type) {
    case CENTER:
      if (isdown) websock.send("pcdown:" + number);
      else websock.send("pcup:" + number);
      break;
    case UP:
      if (isdown) websock.send("pfdown:" + number);
      else websock.send("pfup:" + number);
      break;
    case DOWN:
      if (isdown) websock.send("pbdown:" + number);
      else websock.send("pbup:" + number);
      break;
    case LEFT:
      if (isdown) websock.send("pldown:" + number);
      else websock.send("plup:" + number);
      break;
    case RIGHT:
      if (isdown) websock.send("prdown:" + number);
      else websock.send("prup:" + number);
      break;
  }
}

function switcher(number, state) {
  if (state == null) {
    if (!$("#sl" + number).hasClass("checked")) {
      websock.send("sactive:" + number);
      $("#sl" + number).addClass("checked");
    } else {
      websock.send("sinactive:" + number);
      $("#sl" + number).removeClass("checked");
    }
  } else if (state == 1) {
    $("#sl" + number).addClass("checked");
    $("#sl" + number).prop("checked", true);
  } else if (state == 0) {
    $("#sl" + number).removeClass("checked");
    $("#sl" + number).prop("checked", false);
  }
}

var rangeSlider = function (isDiscrete) {
  var range = $(".range-slider__range");
  var slidercb = function() {
    sliderchange($(this).attr("id").replace(/^\D+/g, ""));
  };

  range.on({input: function() {
    $(this).next().html(this.value)}
  });

  range.each(function() {
    $(this).next().html(this.value);
    if($(this).attr("callbackSet") != "true") {
      if (!isDiscrete) {
        $(this).on({input: slidercb}); //input fires when dragging
      } else {
        $(this).on({change: slidercb}); //change fires only once released
      }
      $(this).attr("callbackSet", "true");
    }
  });
};


var addToHTML = function(data) {
  panelStyle = data.hasOwnProperty('panelStyle') ? " style='" + data.panelStyle + "' " : "";
  panelwide = data.hasOwnProperty('wide') ? "wide" :  "";

  if(!data.hasOwnProperty('parentControl') || $("#tab" + data.parentControl).length > 0) {
    //We add the control with its own panel
    var parent = data.hasOwnProperty('parentControl') ? 
      $("#tab" + data.parentControl) :
      $("#row");

    var html = "";
    switch(data.type) {
      case UI_LABEL:
      case UI_BUTTON:
      case UI_SWITCHER:
      case UI_CPAD:
      case UI_PAD:
      case UI_SLIDER:
      case UI_NUMBER:
      case UI_TEXT_INPUT:
      case UI_SELECT:
      case UI_GRAPH:
      case UI_GAUGE:
      case UI_ACCEL:
        html = "<div id='id" + data.id + "' " + panelStyle + " class='two columns " + panelwide + " card tcenter " +
        colorClass(data.color) + "'><h5>" + data.label + "</h5><hr/>" +
        elementHTML(data) +
        "</div>";
        break;
      case UI_SEPARATOR:
        html = "<div id='id" + data.id + "' " + panelStyle + " class='sectionbreak columns'>" +
        "<h5>" + data.label + "</h5><hr/></div>";
        break;
      case UI_TIME:
        //Invisible element
        break;
    }

    parent.append(html);

  } else {
    //We are adding to an existing panel so we only need the HTML for the element
    var parent = $("#id" + data.parentControl);
    parent.append(elementHTML(data));
  }
}

var elementHTML = function(data) {
  var id = data.id
  var elementStyle = data.hasOwnProperty('elementStyle') ? " style='" + data.elementStyle + "' " : "";
  switch(data.type) {
    case UI_LABEL:
      return "<span id='l" + id + "' " + elementStyle + 
        " class='label label-wrap'>" + data.value + "</span>";
    case UI_BUTTON:
      return "<button id='btn" + id + "' " + elementStyle + 
        " onmousedown='buttonclick(" + id + ", true)'" +
        " onmouseup='buttonclick(" + id + ", false)'>" +
        data.value + "</button>";
    case UI_SWITCHER:
      return "<label id='sl" + id + "' " + elementStyle + 
      " class='switch " + (data.value == "1" ? "checked" : "") + 
      (data.hasOwnProperty('vertical') ? " vert-switcher " : "") + 
      "'>" +
      "<div class='in'>" + 
      "<input type='checkbox' id='s" + id + "' onClick='switcher(" + id + ",null)' " + 
      (data.value == "1" ? "checked" : "") + "/></div></label>";
    case UI_CPAD:
    case UI_PAD:
      return "<nav class='control'><ul>" + 
        "<li><a onmousedown='padclick(UP, " + id + ", true)' " +
            "onmouseup='padclick(UP, " + id + ", false)' id='pf" + id + "'>&#9650;</a></li>" +
        "<li><a onmousedown='padclick(RIGHT, " + id + ", true)' " + 
            "onmouseup='padclick(RIGHT, " + id + ", false)' id='pr" + id + "'>&#9650;</a></li>" +
        "<li><a onmousedown='padclick(LEFT, " + id + ", true)' " + 
            "onmouseup='padclick(LEFT, " + id + ", false)' id='pl" + id + "'>&#9650;</a></li>" +
        "<li><a onmousedown='padclick(DOWN, " + id + ", true)' " + 
            "onmouseup='padclick(DOWN, " + id + ", false)' id='pb" + id + "'>&#9650;</a></li>" +
        "</ul>" +
        (data.type == UI_CPAD
          ? "<a class='confirm' onmousedown='padclick(CENTER," + id + ", true)' " + 
            "onmouseup='padclick(CENTER, " + id + ", false)' id='pc" + id + "'>OK</a>"
          : "") +
        "</nav>";
    case UI_SLIDER:
      return "<div class='range-slider " + 
        (data.hasOwnProperty('vertical') ? " vert-slider " : "") + 
        "'>" + 
        "<input id='sl" + id + "' type='range' min='0' max='100' value='" + data.value + "' " + 
        elementStyle + " class='range-slider__range'><span class='range-slider__value'>" + 
        data.value + "</span></div>";
    case UI_NUMBER:
      return "<input style='color:black;' " + elementStyle + " id='num" + id + 
        "' type='number' value='" + data.value + "' onchange='numberchange(" + id + ")' />";
    case UI_TEXT_INPUT:
      return "<input style='color:black;' " + elementStyle + " id='text" + id +
        "' value='" + data.value + "' onchange='textchange(" + id + ")' />";
    case UI_SELECT:
      return "<select style='color:black;' " + elementStyle + " id='select" + id +
        "' onchange='selectchange(" + id + ")' />";
    case UI_GRAPH:
      return "<figure id='graph" + id + "'><figcaption>" + data.label + "</figcaption></figure>";
    case UI_GAUGE:
      return "WILL BE A GAUGE <input style='color:black;' id='gauge" + id + 
        "' type='number' value='" + data.value + "' onchange='numberchange(" + id + ")' />";
    case UI_ACCEL:
      return "ACCEL // Not implemented fully!<div class='accelerometer' id='accel" + id +
        "' ><div class='ball" + id + "'></div><pre class='accelerometeroutput" + id + "'></pre>";
    default:
      return "";
  }
}