var rawContent;
var data = [];
var update = [];
var loading = false;
var websock;

var settings = {
  modOffset: 0,
  inputOffset: 0,
  updateInterval: 2,
  autoupdate: false,
  emulateMaster: false
}

var autoRefreshInterval;

function GetData() {
  if (loading)
    return;
  loading = true;
  return fetch("/data")
    .then(function (result) {
      return result.text().then(function (text) {
        rawContent = text;
        data = ConvertData(rawContent);
        loading = false;
      });
    })
    .catch(function () {
      loading = false;
    });
}

function ConvertData(rawContent) {
  let dataResult = [];

  var tmpList = rawContent.split('~');
  tmpList.forEach(resultLine => {
    var tmpResultLine = resultLine.split(":");
    var tmpModule = tmpResultLine[0].split(".");
    var dataObj = {
      module: parseInt(tmpModule[0]),
      input: parseInt(tmpModule[1]),
      data: (tmpResultLine[1] == 1)
    }
    if (!isNaN(dataObj.input) && !isNaN(dataObj.module))
      dataResult.push(dataObj);
  });
  return dataResult;
}

function RenderData(data) {
  var table = document.getElementById("overview");
  table.innerHTML = "";
  var lastModule = -1;
  var row;
  data.forEach(element => {
    if (lastModule != element.module) {
      lastModule = element.module
      row = table.insertRow(element.module);
      var title = row.insertCell(0);
      title.innerHTML = (element.module + settings.modOffset);
    }
    var cell = row.insertCell(element.input + 1);
    cell.innerHTML = (element.input + settings.inputOffset);
    cell.classList.add('input-value')
    cell.classList.add('input-value-' + ((element.data) ? "ON" : "OFF"))
  });
  document.getElementById("lastUpdate").innerHTML = new Date().toLocaleString();
}

function SaveSettings() {
  settings.modOffset = parseInt(document.getElementById("modOffset").value);
  settings.inputOffset = parseInt(document.getElementById("inputOffset").value);
  settings.updateInterval = parseInt(document.getElementById("updateInterval").value);
  settings.autoupdate = document.getElementById("checkoptions-0").checked
  settings.emulateMaster = document.getElementById("checkoptions-1").checked
  window.localStorage.setItem('settings', JSON.stringify(settings));
  SetAutoUpdate();
}

function LoadSettings(rawSettings) {
  if (rawSettings == null) {
    var tmpsettings = JSON.parse(window.localStorage.getItem('settings'));
    if (tmpsettings == null)
      return;
    settings = tmpsettings;
  } else {
    settings = rawSettings;
  }

  document.getElementById("modOffset").value = settings.modOffset;
  document.getElementById("inputOffset").value = settings.inputOffset;
  document.getElementById("updateInterval").value = settings.updateInterval;
  document.getElementById("checkoptions-0").checked = settings.autoupdate;
  document.getElementById("checkoptions-1").checked = settings.emulateMaster;
  SetAutoUpdate();
}

function SaveSettingsOnDevice() {
  SaveSettings();
  var urlEncodedSettings = encodeURI(JSON.stringify(settings));
  var url = "/config?key=settings&value=" + urlEncodedSettings;

  fetch(url)
    .then(function (result) {
      result.text().then(function (text) {
        alert("Saved")
      });
    })
    .catch(function () {
    });
}

function LoadSettingsFromDevice() {
  fetch("/config?key=settings")
    .then(function (result) {
      return result.text().then(function (text) {
        var settingsraw = JSON.parse(decodeURI(text));
        LoadSettings(settingsraw);
      });
    })
    .catch(function () {
      loading = false;
    });
}

function SetAutoUpdate() {
  if (autoRefreshInterval != null)
    clearInterval(autoRefreshInterval)
  autoRefreshInterval = setInterval(() => {
    if (settings.autoupdate) {
      if (loading)
        return;
      DoUpdate();
    }
  }, settings.updateInterval * 1000);
}

function DoUpdate() {
  if (loading)
    return;
  GetData().then(() => {
    RenderData(data)
  });
}

function StartSocket() {
  websock = new WebSocket('ws://' + window.location.hostname + ':81/');
  websock.onopen = function (evt) { console.log('websock open'); };
  websock.onclose = function (evt) { console.log('websock close'); };
  websock.onerror = function (evt) { console.log(evt); };
  websock.onmessage = function (evt) {
    console.log(evt);
    switch (evt.data) {
      case "update":
        DoUpdate();
        break;
      default:
        var data = evt.data;
        update = data.split(";");
        UpdateData(update);
        break;
    }
  };
}

function UpdateData(update) {
  update.forEach(u => {
    if (u != '') {
      var tmp = u.split('|');
      var module = tmp[0];
      if (tmp[1] != null) {
        tmp = tmp[1].split(':');
        var input = tmp[0];

        if (tmp[1] != null) {
          var value = tmp[1];
          data.find(d => d.module == module && d.input == input).data = (value == "1");
        }
      }
    }
  });
  RenderData(data);
}

LoadSettings();
DoUpdate();
StartSocket();
document.getElementById("button-save").addEventListener("click", SaveSettings);
document.getElementById("button-save-device").addEventListener("click", SaveSettingsOnDevice);
document.getElementById("button-load-device").addEventListener("click", LoadSettingsFromDevice);
document.getElementById("button-update").addEventListener("click", DoUpdate);