/**The code here prompts the user with 'What would you like to do?'
 * if the string 'new' is entered, the code prompts again with 'Enter a new todo?'
 * the entered string gets pushed to the list
 * After adding a new element to the list, the app prompts again with the first question
 * if the string 'list'is entered, the app shows all the elementsof the list
 * if the string 'quit' is entered the app stops
 * if the string 'delete is returned the app delete a specific item
 */

//declare the todos array
var todos = [];

//declare the input
var input = prompt("What would you like to do?");

//timeout workaround
window.setTimeout(function() {
  //loop keeps prompting for input untill input === "quit"
  while (input !== "quit") {
    if (input === "list") {
      listTodo();
    } else if (input === "new") {
      addTodo();
    } else if (input === "delete") {
      deleteTodo();
    }
  }
  alert("YOU EXITED THE APP!!!");
}, 500);

/** lists all element from the todos array */
var listTodo = function() {
  todos.forEach(function(todos, i) {
    alert(i + ": " + todos.toString());
  });
  input = prompt("What would you like to do?");
};

/** adds a new element to the todos array */
var addTodo = function() {
  var newtodo = prompt("Enter new todo");
  todos.push(newtodo);
  alert("new task: " + newtodo.toString() + " has been added");
  input = prompt("What would you like to do?");
};

/** deletes an element from the todos array */
var deleteTodo = function() {
  var todelete = Number(prompt("What element to delete?"));
  var spliced = todos.splice(todelete, 1);
  alert(spliced.toString() + " has been deleted");
  input = prompt("What would you like to do?");
};