import { EMPTY_REWARD, ITEM_FRAME } from "common/Constants";
import { LotteryCache } from "common/LotteryCache";
import { SyncLocker } from "common/SyncLocker";
import { ZError } from "common/ZError";
import BaseController from "common/base.controller";
import { FUSION_CFG } from "configs/fusion";
import { ALL_ITEMS } from "configs/items";
import { LOTTERY_CFG } from "configs/lottery";
import { router } from "decorators/router";
import { FastifyRequest } from "fastify";
import { ActivityItem } from "models/ActivityItem";
import { LotteryRecord } from "models/LotteryRecord";
import { updateRankScore } from "services/rank.svr";
import { formatDate } from "utils/date.util";

const ROUND = 1000000;

// Get random prizes according to the set probability
const draw = (rewards: {probability: number}[]) => {
  let total = 0;
  let random = Math.floor(Math.random() * ROUND);
  let reward = null;
  for (let r of rewards) {
    total += r.probability;
    if (random < total) {
      reward = r;
      break;
    }
  }
  return {id: reward?.item || EMPTY_REWARD, amount: reward?.amount || 1};
}

export default class LotteryController extends BaseController {
  @router('get /api/lottery/stats')
  async userStats(req) {
    let user = req.user;
    let record = await new LotteryCache().getData(user.id, user.activity);
    let result:any = record.toJson();
    let items = await ActivityItem.find({user: user.id, activity: user.activity});
    result.items = items.map((i) => i.toJson());
    return result;
  }

  @router('post /api/lottery/history')
  async userLotteryHistory(req) {
    let user = req.user;
    let { day, page, limit } = req.params;
    const query: any = {user: user.id, activity: user.activity};
    if (day !== 'all') {
      query.dateTag = day;
    }
    page = +page || 1
    limit = +limit || 10
    let start = page * limit || 0

    
    let historys = await LotteryRecord.find(query).skip(start).limit(limit);
    let total = await LotteryRecord.countDocuments(query);
    return {
      count: total,
      page: +page,
      limit,
      records: historys.map((h) => h.toJson())
    }
  }

  @router('get /api/lottery/items')
  async items(req) {
    const items = ALL_ITEMS;
    const cfgs = LOTTERY_CFG;
    const itemMap = new Map();
    for (let item of items) {
      itemMap.set(item.id, item);
    }
    let result = [];
    for (let cfg of cfgs.rewards) {
      result.push({
        id: cfg.item,
        amount: cfg.amount,
        name: itemMap.get(cfg.item).name,
      })
    }
    return {items: result, start: cfgs.start, end: cfgs.end};
  }

  
  @router('get /api/lottery/draw')
  async draw(req) {
    new SyncLocker().checkLock(req);
    let user = req.user;
    const { start, end, rewards } = LOTTERY_CFG;
    const startTime = new Date(start).getTime();
    const endTime = new Date(end).getTime();
    const now = Date.now();
    if (now < startTime) {
      throw new ZError(10, 'lottery not start');
    }
    if (now > endTime) {
      throw new ZError(11, 'lottery end');
    }
    let record = await new LotteryCache().getData(user.id, user.activity);
    if (record.amount <= 0) {
      throw new ZError(12, 'no chance');
    }
    record.amount -= 1;
    record.used += 1;
    let reward = draw(rewards);
    const dateTag = formatDate(new Date());
    let history = new LotteryRecord({
      user: user.id,
      activity: user.activity,
      dateTag,
      reward: reward?.id || EMPTY_REWARD,
      amount: reward.amount || 0,
    });
    await history.save();
    const items = ALL_ITEMS;
    const itemMap = new Map();
    for (let item of items) {
      itemMap.set(item.id, item);
    }
    if (itemMap.get(reward.id)?.score) {
      let score = (reward?.amount || 0) * itemMap.get(reward.id).score;
      if (user.boost > 1 && Date.now() < user.boostExpire) {
        score = Math.floor(score * user.boost)
      }
      await updateRankScore({
        user: user.id,
        score,
        activity: user.activity,
        scoreType: "draw",
        scoreParams: {
          date: dateTag
        }
      })
    } 
    await ActivityItem.insertOrUpdate({
      user: user.id, 
      activity: user.activity, 
      item: reward.id
    }, 
    {
      $inc: {amount: reward.amount}, 
      last: Date.now()
    })
    return reward;
  }

  @router('get /api/lottery/fusion')
  async fusion(req) {
    new SyncLocker().checkLock(req);
    let user = req.user;
    let items = await ActivityItem.find({user: user.id, activity: user.activity});
    let itemCountMap = new Map();
    for (let item of items) {
      itemCountMap.set(item.item, item.amount);
    }
    for (let item of FUSION_CFG.source) {
      if (!itemCountMap.has(item.id)) {
        throw new ZError(13, 'no enough item');
      }
      if (itemCountMap.get(item.id) < item.amount) {
        throw new ZError(14, 'no enough item');
      }
    }
    for (let item of FUSION_CFG.source) {
      await ActivityItem.insertOrUpdate({
        user: user.id, 
        activity: user.activity, 
        item: item.id
      }, 
      {
        $inc: {amount: -item.amount}, 
        last: Date.now()
      })
    }

    await ActivityItem.insertOrUpdate({
      user: user.id, 
      activity: user.activity, 
      item: FUSION_CFG.target.id
    }, 
    {
      $inc: {amount: FUSION_CFG.target.amount}, 
      last: Date.now()
    })
    
    return {
      id: FUSION_CFG.target.id,
      amount: FUSION_CFG.target.amount,
    }
  }

}