const ENCOUNTER_POOL = [
  "jaw_worm",
  "cultist",
  "fungi_beast",
  "small_slime",
  "red_louse",
  "green_louse",
  "blue_slaver",
];
const ELITE_POOL = ["lagavulin", "gremlin_nob", "sentry"];
const BOSS_POOL = ["slime_boss", "the_guardian"];

const ACT1_LAYOUT = [
  "encounter",
  "encounter",
  "campfire",
  "encounter",
  "elite",
  "encounter",
  "campfire",
  "encounter",
  "elite",
  "boss",
];

export function createMap() {
  return {
    nodes: ACT1_LAYOUT.map((type, id) => ({ id, type, cleared: false })),
    currentNode: 0,
  };
}

export function advanceMap(map) {
  const last = map.nodes.length - 1;
  const nodes = map.nodes.map((n, i) =>
    i === map.currentNode ? { ...n, cleared: true } : n,
  );
  return {
    ...map,
    nodes,
    currentNode: Math.min(map.currentNode + 1, last),
  };
}

export function getCurrentNode(map) {
  return map.nodes[map.currentNode];
}

export function getNodeEnemy(nodeType) {
  const pools = {
    encounter: ENCOUNTER_POOL,
    elite: ELITE_POOL,
    boss: BOSS_POOL,
  };
  const pool = pools[nodeType];
  if (!pool) return null;
  return pool[Math.floor(Math.random() * pool.length)];
}