let currentRoom = null;
let currentDialog = null;

let dirButtons = [];
let actionButtons = [];
let dialogButtons = [];

let mode = "explore";
let actions = [];
let time = 9*60;
let newline = " ";

let player = new Player();

function Object(name="Potato") {
  this.name = name;
  this.actions = [];
}

function Burger() {
  Object.call(this, "Burger");
  this.actions.push({
    "name": "Punch Burger",
    "action": function() {
      player.health += 10;
      update(["You punch the hamburger."]);
    }
  });
}

function Nerd() {
  Object.call(this, "Nerd");
  this.actions.push({
    "name": "Eat Nerd",
    "action": function() {
      startDialog(new EatDude());
    }
  });
}

function startDialog(dialog) {
  mode = "dialog";
  currentDialog = dialog;
  updateDisplay();
}

function updateExploreCompass() {
  for (let i = 0; i < dirButtons.length; i++) {
    let button = dirButtons[i];
    if (currentRoom.exits[i] == null) {
      button.disabled = true;
      button.classList.remove("active-compass-button");
      button.classList.add("inactive-button");
      button.innerHTML = "";
    } else {
      button.disabled = false;
      button.classList.remove("inactive-button");
      button.classList.add("active-compass-button");
      button.innerHTML = currentRoom.exits[i].name;
    }
  }
}
function updateExploreActions() {
  for (let i = 0; i < actionButtons.length; i++) {
    if (i < actions.length) {
      actionButtons[i].disabled = false;
      actionButtons[i].innerHTML = actions[i].name;
      actionButtons[i].classList.remove("inactive-button");
      actionButtons[i].classList.add("active-button");
    }
    else {
      actionButtons[i].disabled = true;
      actionButtons[i].innerHTML = "";
      actionButtons[i].classList.remove("active-button");
      actionButtons[i].classList.add("inactive-button");
    }
  }
}

function updateExplore() {
  updateExploreCompass();
  updateExploreActions();
}

function updateCombat() {

}

function updateDialog() {
  for (let i = 0; i < dialogButtons.length; i++) {
    if (i < currentDialog.choices.length) {
      dialogButtons[i].disabled = false;
      dialogButtons[i].innerHTML = currentDialog.choices[i].text;
      dialogButtons[i].classList.remove("inactive-button");
      dialogButtons[i].classList.add("active-button");
    } else {
      dialogButtons[i].disabled = true;
      dialogButtons[i].innerHTML = "";
      dialogButtons[i].classList.remove("active-button");
      dialogButtons[i].classList.add("inactive-button");
    }
  }
}

function updateDisplay() {
  switch(mode) {
    case "explore":
      document.getElementById("selector-explore").style.display = "flex";
      document.getElementById("selector-combat").style.display = "none";
      document.getElementById("selector-dialog").style.display = "none";
      updateExplore();
      break;
    case "combat":
      document.getElementById("selector-explore").style.display = "none";
      document.getElementById("selector-combat").style.display = "flex";
      document.getElementById("selector-dialog").style.display = "none";
      updateCombat();
    case "dialog":
      document.getElementById("selector-explore").style.display = "none";
      document.getElementById("selector-combat").style.display = "none";
      document.getElementById("selector-dialog").style.display = "flex";
      updateDialog();
      break;
  }

  document.getElementById("time").innerHTML = "Time: " + renderTime(time);
  document.getElementById("stat-name").innerHTML = "Name: " + player.name;
  document.getElementById("stat-health").innerHTML = "Health: " + player.health + "/" + player.maxHealth;
  document.getElementById("stat-fullness").innerHTML = "Fullness: " + player.fullness + "/" + player.maxFullness;
}

function advanceTime(amount) {
  time = (time + amount) % 1440;
}
function renderTime(time) {
  let suffix = (time < 720) ? "AM" : "PM";
  let hour = Math.floor((time % 720) / 60);
  if (hour == 0)
    hour = 12;
  let minute = time % 60;
  if (minute < 9)
    minute = "0" + minute;

  return hour + ":" + minute + " " + suffix;
}

function move(direction) {
  let target = currentRoom.exits[direction];
  if (target == null) {
    alert("Tried to move to an empty room!");
    return;
  }

  moveTo(target);
}

function moveTo(room) {
  actions = [];
  currentRoom = room;
  advanceTime(1);

  currentRoom.objects.forEach(function (object) {
    object.actions.forEach(function (action) {
      actions.push(action);
    })
  })

  update(["You move to " + currentRoom.name,currentRoom.description,newline]);
}

window.addEventListener('load', function(event) {
  loadActions();
  loadCompass();
  loadDialog();
  currentRoom = createWorld();
  currentRoom.objects.push(new Burger());
  currentRoom.objects.push(new Nerd());
  moveTo(currentRoom);
  updateDisplay();
});

function update(lines=[]) {
  let log = document.getElementById("log");
  for (let i=0; i<lines.length; i++) {
    let div = document.createElement("div");
    div.innerHTML = lines[i];
    log.appendChild(div);
  }
  updateDisplay();
}

function dialogClicked(index) {
  currentDialog = currentDialog.choices[index].node;
  update([currentDialog.visit()]);
  if (currentDialog.choices.length == 0) {
    mode = "explore";
    updateDisplay();
  }
}

function loadDialog() {
  dialogButtons = Array.from( document.querySelectorAll(".dialog-button"));
  for (let i = 0; i < dialogButtons.length; i++) {
    dialogButtons[i].addEventListener("click", function() { dialogClicked(i); });
  }
}

function actionClicked(index) {
  actions[index].action();
}

function loadActions() {
  actionButtons = Array.from( document.querySelectorAll(".action-button"));
  for (let i = 0; i < actionButtons.length; i++) {
    actionButtons[i].addEventListener("click", function() { actionClicked(i); });
  }
}

function loadCompass() {
  dirButtons[NORTH_WEST] = document.getElementById("compass-north-west");
  dirButtons[NORTH_WEST].addEventListener("click", function() {
    move(NORTH_WEST);
  });
  dirButtons[NORTH] = document.getElementById("compass-north");
  dirButtons[NORTH].addEventListener("click", function() {
    move(NORTH);
  });
  dirButtons[NORTH_EAST] = document.getElementById("compass-north-east");
  dirButtons[NORTH_EAST].addEventListener("click", function() {
    move(NORTH_EAST);
  });
  dirButtons[WEST] = document.getElementById("compass-west");
  dirButtons[WEST].addEventListener("click", function() {
    move(WEST);
  });
  dirButtons[EAST] = document.getElementById("compass-east");
  dirButtons[EAST].addEventListener("click", function() {
    move(EAST);
  });
  dirButtons[SOUTH_WEST] = document.getElementById("compass-south-west");
  dirButtons[SOUTH_WEST].addEventListener("click", function() {
    move(SOUTH_WEST);
  });
  dirButtons[SOUTH] = document.getElementById("compass-south");
  dirButtons[SOUTH].addEventListener("click", function() {
    move(SOUTH);
  });
  dirButtons[SOUTH_EAST] = document.getElementById("compass-south-east");
  dirButtons[SOUTH_EAST].addEventListener("click", function() {
    move(SOUTH_EAST);
  });
}