// bool if player/computer found the number
var found;
var numberToGuess;
var guessedNumber;
var minimum;
var maximum;

function showText(element, text) {
  element.textContent = text;
}

/**
 * Return a randon between min and max.
 * @param {number} min - The minimum value of the random number.
 * @param {number} max - The maximum value of the random number.
 * @return {number}
 */
function randint(min, max) {
  return Math.floor(Math.random() * (max - min + 1) + min);
}

/**
 * Returns to the previous state
 * @return {void}
 */
function back() {
  unhide(document.getElementById("game_selection"));
  hide(document.getElementById("game_one"));
  hide(document.getElementById("game_two"));
  document.removeEventListener("keydown", process_keydown);
}

/**
 * This function shows the first game
 * @return {void}
 */
function setup_game_one() {
  hide(document.getElementById("game_selection"));
  unhide(document.getElementById("game_one"));
  numberToGuess = randint(1, 100);
  console.log(numberToGuess);
  showText(document.getElementById("message1"), "");
  document.getElementById("player_input").value = "";
}

/**
 * This function is responsible for processing the player's guess in game one.
 * It retrieves the player's input, validates it, and compares it to the number to guess.
 * It also provides feedback to the player based on their guess
 * @return {void}
 */
function process_guess() {
  let player_input = document.getElementById("player_input");
  let guessedNumber = parseInt(player_input.value);
  player_input.value = "";
  let message_box = document.getElementById("message1");
  if (isNaN(guessedNumber)) {
    showText(message_box, "Not a valid number, Try again");
  }
  if (guessedNumber > numberToGuess) {
    showText(message_box, "Nop, " + guessedNumber + " is too high, try again");
  }
  if (guessedNumber < numberToGuess) {
    showText(message_box, "Nop, " + guessedNumber + " is too low, try again");
  }
  if (guessedNumber === numberToGuess) {
    showText(message_box, "You found it well played");
  }
}

/**
 * This function tries to predict the player's number
 * @param {bool} smart - use dichotomic search for guessing
 * @returns {number} - the predicted number
 */
function pick_number(smart = false) {
  if (smart) return Math.floor((minimum + maximum) / 2);
  return randint(minimum, maximum);
}

/**
 * Processes the keydown events for game two to handle player input (lower, greater, found, retry).
 * @param {KeyboardEvent} event - The keyboard event object.
 * @return {void}
 */
function process_keydown(event) {
  switch (event.key) {
    case "L":
    case "l":
      lower();
      break;
    case "G":
    case "g":
      greater();
      break;
    case "F":
    case "f":
      found();
      break;
    case "R":
    case "r":
      document.removeEventListener("keydown", process_keydown);
      setup_game_two();
      break;
  }
}

function setup_game_two() {
  hide(document.getElementById("game_selection"));
  unhide(document.getElementById("game_two"));
  minimum = 1;
  maximum = 100;
  guessedNumber = pick_number();
  showText(
    document.getElementById("message2"),
    "is it " + guessedNumber + " ?",
  );
  document.addEventListener("keydown", process_keydown);
}

function lower() {
  maximum = guessedNumber - 1;
  guessedNumber = pick_number();
  showText(
    document.getElementById("message2"),
    "is it " + guessedNumber + " ?",
  );
}
function greater() {
  minimum = guessedNumber + 1;
  guessedNumber = pick_number();
  showText(
    document.getElementById("message2"),
    "is it " + guessedNumber + " ?",
  );
}
function found() {
  showText(document.getElementById("message2"), "yay i found it");
}