const names = ["Gvar Hamryd", "Rozlewisko Kai"];

const _newNpc = window.newNpc;
window.newNpc = function (npcs) {
  if (npcs !== undefined) {
    for (const npc of Object.values(npcs)) {
      if (names.includes(npc.nick)) {
        createFakeGateways(npc);
      }
    }
  }

  _newNpc.apply(this, arguments);
}

const _send = window._g;
window._g = function (url) {
  if (url === "walk") {
    const {x, y} = window.hero;
    if (isFakeGatewayAtPosition(x, y)) {
      window.hero.autoWalkLock = true;
      url = `talk&id=${getFakeGatewayId(x, y)}`;
    }
  }

  _send.apply(this, arguments);
}


function createFakeGateways(npc) {
  const nearbyNodes = getNearbyNodes(npc.x, npc.y);
  for (const [x, y] of nearbyNodes) {
    craeteElementAtPosition(npc.nick, npc.id, x, y);
    setFakeGateway(npc.nick, npc.id, x, y);
  }
}

function getNearbyNodes(x, y) {
  const nodes = [];
  for (let i = y - 1; i <= y + 1; i++) {
    for (let j = x - 1; j <= x + 1; j++) {
      if (!isNodeBlockedAtPosition(j, i)) {
        nodes.push([j, i]);
      }
    }
  }

  return nodes;
}

function isNodeBlockedAtPosition(x, y) {
  if (x === undefined || y === undefined) return true;
  if (x < 0 || x > window.map.x || y < 0 || y > window.map.y) return true;

  return window.map.col[y * window.map.x + x] !== "0";
}

function craeteElementAtPosition(name, id, x, y) {
  const gw = document.createElement("div");
  gw.classList.add("gw");
  gw.classList.add("gwmap");
  gw.id = "gw" + id;
  gw.style.left = `${x * 32}px`;
  gw.style.top = `${y * 32}px`;
  gw.tip = name + "1";
  gw.addEventListener("click", e => window.hero.mClick(e));
  document.querySelector("#base").appendChild(gw);
}

function setFakeGateway(name, id, x, y) {
  const position = `${x}.${y}`;
  window.g.gwIds[id] = position;
  window.g.townname[id] = name + "1";
  window.g.gw[position] = 69;
}

function isFakeGatewayAtPosition(x, y) {
  const position = `${x}.${y}`;
  if (window.g.gw[position] && window.g.gw[position] === 69) return true;
  return false;
}

function getFakeGatewayId(x, y){
  const position = `${x}.${y}`;
  for(const [id, pos] of Object.entries(window.g.gwIds)){
    if(pos === position) return id;
  }
}