// -----------------------------------------------
// Common functions used in Options handling
// -----------------------------------------------
//
// Get default values of preferences
//
function getPrefDefaults() {
  return {
    prefs: {
      overrideDeleteConfirm: false,
      selectTrashDelete: false,
      selectJunkDelete: false,
      consoleDebug: false,
      disableDoneNotification: false,
      alsoCompact: false
    }
  };
}

//
// Get preferences from storage and return the structure asynchronously
//
async function getPrefs() {
  let getting = await browser.storage.sync.get("prefs");

  let fr = "";
  if ($.isEmptyObject(getting)) {
    prefs = getPrefDefaults();
    fr = "defaults";
  } else {
    prefs = getting;
    fr = "storage";
  };
  console.log("Loaded prefs from " + fr);

  return getting;
}

//
// Handle the event of an option change in options UI. Event is passed in as
// the 'ch' argument. This function records the changed option in to the
// options storage and returns the updated structure asynchronously
//
async function changeOption(ch) {
  var i = ch[0].id;
  var c = ch[0].checked;
  console.log("Pref: " + i + " -> " + c);
       if (i == "overrideDeleteConfirm")   { prefs.prefs.overrideDeleteConfirm = c; }
  else if (i == "selectTrashDelete")       { prefs.prefs.selectTrashDelete = c; }
  else if (i == "selectJunkDelete")        { prefs.prefs.selectJunkDelete = c; }
  else if (i == "consoleDebug")            { prefs.prefs.consoleDebug = c; }
  else if (i == "disableDoneNotification") { prefs.prefs.disableDoneNotification = c; }
  else if (i == "alsoCompact")             { prefs.prefs.alsoCompact = c; }
  await browser.storage.sync.set(prefs);

  prefs = await getPrefs();

  return prefs;
}

//
// Given the preferences structure, update the options IO with appropriate values
//
function updateOptionsForm(prefs) {
  $("#overrideDeleteConfirm").prop('checked', prefs.prefs.overrideDeleteConfirm);
  $("#selectTrashDelete").prop('checked', prefs.prefs.selectTrashDelete);
  $("#selectJunkDelete").prop('checked', prefs.prefs.selectJunkDelete);
  $("#selectJunkDelete").prop('checked', prefs.prefs.selectJunkDelete);
  $("#consoleDebug").prop('checked', prefs.prefs.consoleDebug);
  $("#disableDoneNotification").prop('checked', prefs.prefs.disableDoneNotification);
  $("#alsoCompact").prop('checked', prefs.prefs.alsoCompact);
}