// https://stackoverflow.com/a/105074/260793
var createTask, getTaskData, getUserData, guid, handleFormSubmit, initialize, isBlank, makeChecklist, makeItem, restoreUserData, s4, showMessage, validateTaskData;

guid = function() {
  return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
};

s4 = function() {
  return Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
};

showMessage = function(msg, level) {
  if (msg) {
    return $('#message').html(`<span class="text-${level}">${msg}</span>`);
  } else {
    return $('#message').html('Creating...', 'info');
  }
};

getUserData = function() {
  var token, user, userData;
  userData = {};
  token = _.trim($('#api-token').val());
  if (token) {
    userData['x-api-key'] = localStorage['habitica-api-token'] = token;
  } else {
    throw new Error('Api token is required');
  }
  user = _.trim($('#api-user').val());
  if (user) {
    userData['x-api-user'] = localStorage['habitica-api-user'] = user;
  } else {
    throw new Error('User ID is required');
  }
  return userData;
};

restoreUserData = function() {
  $('#api-user').val(localStorage['habitica-api-user']);
  return $('#api-token').val(localStorage['habitica-api-token']);
};

makeItem = function(text) {
  return {
    id: guid(),
    text: text,
    completed: false
  };
};

isBlank = function(text) {
  return !_.trim(text);
};

makeChecklist = function() {
  var text;
  text = $('#checklist').val();
  return _.chain(text).split('\n').reject(isBlank).map(makeItem).value();
};

getTaskData = function() {
  var task;
  return task = {
    type: $('[name=task-type]:checked').val(),
    text: _.trim($('#task-title').val()),
    checklist: makeChecklist()
  };
};

validateTaskData = function(taskData) {
  if (!taskData.text) {
    throw new Error('task title is required');
  }
  if (taskData.checklist.length === 0) {
    throw new Error('checklist is required');
  }
};

resetTaskForm = function() {
  $('#task-title').val('')
  $('#checklist').val('')
};

createTask = function(userData, taskData) {
  return $.ajax({
    url: 'https://habitica.com/api/v4/tasks/user',
    method: 'POST',
    headers: userData,
    data: taskData,
    success: function() {
      resetTaskForm()
      return showMessage('Task created successfully! Now refresh your task list.', 'success');
    },
    error: function(xhr, status, err) {
      showMessage('Task failed to create.', 'danger');
      return console.error(err);
    }
  });
};

handleFormSubmit = function(evt) {
  var err, taskData, userData;
  evt.preventDefault();
  try {
    userData = getUserData();
    taskData = getTaskData();
    validateTaskData(taskData);
    createTask(userData, taskData);
    showMessage();
  } catch (error) {
    err = error;
    showMessage(err.message, 'danger');
  }
  return false;
};

initialize = function() {
  restoreUserData();
  return $('#form').submit(handleFormSubmit);
};

$(document).ready(initialize);