import cloud from '@lafjs/cloud';
import Utils from "@/Utils";

const db = cloud.database();
const level1 = [4, 5, 6, 7, 8];
const level2 = [9, 10];
const level3 = [11];
const DEFAULT_CAT_ARR = [1, 2, 3];
const FILM_CONSUME_TABLE = [5, 10, 25, 35, 55, 70, 100, 120];

/**猫咪抽卡 */
export default async function (ctx: FunctionContext) {
  const uid = ctx.body.uid;
  const dbname = ctx.body.gameName == "iaa" ? "usersAd" : "users";
  const res = await db.collection(dbname).where({ _id: uid }).getOne();

  if (!res.data) {
    return { code: 0, data: null, msg: "未获取到玩家信息" };
  }

  if (res.data.token && !Utils.checkToken(ctx.body.token, res.data.token)) {
    return { code: 0, data: null, msg: "token校验失败" };
  }

  let film = res.data.film;
  if (!film && film != 0) {
    film = res.data.levelAmount;
  }

  const catArr = Array.isArray(res.data.catArr)
    ? [...res.data.catArr]
    : [...DEFAULT_CAT_ARR];
  const list1 = level1.filter(catId => !catArr.includes(catId));
  const list2 = level2.filter(catId => !catArr.includes(catId));
  const list3 = level3.filter(catId => !catArr.includes(catId));
  const total = list1.length * 150 + list2.length * 50 + list3.length * 8;

  if (total == 0) {
    return { code: 0, data: null, msg: "已抽取所有猫咪" };
  }

  const totalCount = level1.length + level2.length + level3.length;
  const ownedCount = totalCount - (list1.length + list2.length + list3.length);
  const filmCost = FILM_CONSUME_TABLE[Math.min(ownedCount, 7)];

  film = Number(film) || 0;
  if (film < filmCost) {
    return {
      code: 0,
      data: { film, cost: filmCost },
      msg: "代币不足,闯关获取更多代币！",
    };
  }
  film -= filmCost;

  const weightRoll = Math.floor(Math.random() * total);
  let candidates;
  if (weightRoll < list1.length * 150) {
    candidates = list1;
  } else if (weightRoll < list1.length * 150 + list2.length * 50) {
    candidates = list2;
  } else {
    candidates = list3;
  }

  const reward = candidates[Math.floor(Math.random() * candidates.length)];
  catArr.push(reward);

  await db.collection(dbname).where({ _id: uid }).update({ catArr, film });
  return {
    code: 1,
    data: { catArr, reward, film },
    msg: "成功",
  };
}