import path from "path";
import { fileURLToPath } from "url";

import { getData } from "../libs/cache.js";
import Logs from "../libs/logs.js";

import eventSolutions from '../triangle/eventSolutions.js';

import { getOrderBook, placeOrder as polymarketPlaceOrder } from "../../polymarket/libs/polymarketClient.js";
import { getLineInfo, placeOrder as pinnaclePlaceOrder } from "../../pinnacle/libs/pinnacleClient.js";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const polymarketMarketsCacheFile = path.join(__dirname, "../../polymarket/cache/polymarketMarketsCache.json");
const pinnacleGamesCacheFile = path.join(__dirname, "../../pinnacle/cache/pinnacleGamesCache.json");

/**
 * USDC汇率
 */
const USDC_RATE = 6.9;

/**
 * 最小盈利率
 */
const MIN_PROFIT_RATE = -1;

/**
 * 精确浮点数字
 * @param {number} number
 * @param {number} x
 * @returns {number}
 */
const fixFloat = (number, x=3) => {
  return parseFloat(number.toFixed(x));
}

/**
 * 依次执行任务
 */
const runSequentially = async (tasks) => {
  return new Promise(async (resolve, reject) => {
    const results = [];
    let isError = false;
    for (const task of tasks) {
      // task 必须是一个「返回 Promise 的函数」
      const res = await task().catch(err => {
        err.results = results;
        isError = true;
        reject(err);
      });
      if (isError) {
        break;
      }
      else if (res) {
        results.push(res);
      }
    }
    if (isError) {
      return;
    }
    resolve(results);
  })
}

/**
 * 计算符合比例的最大和最小数组
 */
const findMaxMinGroup = (ratios, minVals, maxVals) => {
  const n = ratios.length;

  // 1. 计算比例总和 & 归一化比例
  const totalRatio = ratios.reduce((a, b) => a + b, 0);
  const proportions = ratios.map(r => r / totalRatio);

  // 2. 计算每个位置允许的最大/最小倍数
  let maxPossibleScale = Infinity;
  let minPossibleScale = 0;   // 如果允许0，通常从0开始

  for (let i = 0; i < n; i++) {
    // 上限约束
    if (proportions[i] > 0) {
      maxPossibleScale = Math.min(maxPossibleScale, maxVals[i] / proportions[i]);
    }
    // 下限约束（如果 minVals[i] > 0 才有意义）
    if (proportions[i] > 0 && minVals[i] > 0) {
      minPossibleScale = Math.max(minPossibleScale, minVals[i] / proportions[i]);
    }
  }

  // 3. 最终取值
  const maxGroup = proportions.map(p => p * maxPossibleScale);
  const minGroup = proportions.map(p => p * Math.max(minPossibleScale, 0));

  return {
    maxGroup: maxGroup.map(v => fixFloat(v)), // 可控制精度
    minGroup: minGroup.map(v => fixFloat(v)),
    proportions: proportions.map(v => fixFloat(v)),
    scaleForMax: fixFloat(maxPossibleScale),
    scaleForMin: fixFloat(minPossibleScale)
  };
}

/**
 * 解析盘口信息
 */
const parseRatio = (ratioString) => {
  if (!ratioString) {
    return null;
  }
  return parseFloat(`${ratioString[0]}.${ratioString.slice(1)}`);
}

const parseIor = (ior) => {
  const iorMatch = ior.match(/ior_(m|r|ou|wm|ot)([ao])?([hcn])?_?(\d+)?/);
  if (!iorMatch) {
    return null;
  }
  const [, type, action, side, ratio] = iorMatch;
  return { type, action, side, ratio };
}

const getPolymarketIorInfo = async (ior, id) => {
  const cacheData = await getData(polymarketMarketsCacheFile);
  const marketsData = cacheData[id]?.marketsData;
  if (!marketsData) {
    Logs.outDev('polymarket markets data not found', id);
    return null;
  }
  const iorOptions = parseIor(ior);
  if (!iorOptions) {
    Logs.outDev('polymarket ior options not found', ior);
    return null;
  }
  const { type, action, side, ratio } = iorOptions;

  let marketTypeData, outcomesSide;

  if (type === 'm') {
    const sideKey = side === 'h' ? 'Home' : side === 'c' ? 'Away' : 'Draw';
    const sideAction = action === 'o' ? 'No' : 'Yes';
    marketTypeData = marketsData.moneyline[sideKey];
    outcomesSide = sideAction;
  }

  else if (type === 'r') {
    const sideKey = side === 'h' ? 'Home' : side === 'c' ? 'Away' : '';
    let ratioDirection = 1;
    if (side === 'c' && action === 'a' || side === 'h' && !action) {
      ratioDirection = -1;
    }
    const ratioValue = parseRatio(ratio) * ratioDirection;
    const ratioKey = ratioValue > 0 ? `+${ratioValue}` : `${ratioValue}`;
    marketTypeData = marketsData.spreads?.[ratioKey];
    outcomesSide = sideKey;
  }

  else if (type === 'ou') {
    const sideKey = side === 'c' ? 'Over' : side === 'h' ? 'Under' : '';
    const ratioKey = parseRatio(ratio);
    marketTypeData = marketsData.totals[ratioKey];
    outcomesSide = sideKey;
  }

  const result = marketTypeData?.outcomes?.[outcomesSide];

  if (!result) {
    Logs.outDev('polymarket market type data not found', { ior, id, type, action, side, ratio, marketTypeData, outcomesSide });
    return null;
  }
  return result;
}

const getPinnacleIorInfo = async (ior, id) => {
  const cacheData = await getData(pinnacleGamesCacheFile);
  const gamesData = cacheData[id];
  if (!gamesData) {
    Logs.outDev('pinnacle games data not found', id);
    return null;
  }
  const iorOptions = parseIor(ior);
  if (!iorOptions) {
    Logs.outDev('pinnacle ior options not found', ior);
    return null;
  }
  const { type, action, side, ratio } = iorOptions;

  const { leagueId, id: eventId, home: homeTeamName, away: awayTeamName, periods={}, specials={}} = gamesData;

  const straightData = periods.straight ?? {};
  const { lineId: straightLineId, moneyline, spreads, totals } = straightData;
  const { winningMargin, exactTotalGoals } = specials;

  if (type === 'm' && moneyline) {
    const sideKey = side === 'h' ? 'home' : side === 'c' ? 'away' : 'draw';
    const team = side === 'h' ? 'TEAM1' : side === 'c' ? 'TEAM2' : 'DRAW';
    const odds = moneyline[sideKey];
    return { leagueId, eventId, betType: 'MONEYLINE', team, lineId: straightLineId, odds };
  }

  else if (type === 'r' && spreads) {
    let ratioDirection = 1;
    if (side === 'c' && action === 'a' || side === 'h' && !action) {
      ratioDirection = -1;
    }
    const ratioKey = parseRatio(ratio) * ratioDirection;
    const itemSpread = spreads.find(spread => spread.hdp == ratioKey);
    if (!itemSpread) {
      Logs.outDev('pinnacle item spread not found', id, type, action, side, ratio);
      return null;
    }
    const { altLineId=null, home, away } = itemSpread;
    const odds = side === 'h' ? home : away;
    const team = side === 'h' ? 'TEAM1' : 'TEAM2';
    const handicap = ratioKey * (side === 'h' ? 1 : -1);
    return { leagueId, eventId, handicap, betType: 'SPREAD', team, lineId: straightLineId, altLineId, odds };
  }

  else if (type === 'ou' && totals) {
    const ratioKey = parseRatio(ratio);
    const itemTotal = totals.find(total => total.points == ratioKey);
    if (!itemTotal) {
      Logs.outDev('pinnacle item total not found', id, type, action, side, ratio);
      return null;
    }
    const { altLineId=null, over, under } = itemTotal;
    const odds = side === 'c' ? over : under;
    const sideKey = side === 'c' ? 'OVER' : 'UNDER';
    return { leagueId, eventId, handicap: ratioKey, betType: 'TOTAL_POINTS', side: sideKey, lineId: straightLineId, altLineId, odds };
  }

  else if (type === 'wm' && winningMargin) {
    const ratioKey = parseRatio(ratio);
    const { id: specialId } = winningMargin;
    const wmName = side === 'h' ? `${homeTeamName} By ${ratioKey}` : side === 'c' ? `${awayTeamName} By ${ratioKey}` : '';
    const wmItem = winningMargin.contestants.find(contestant => contestant.name == wmName);
    if (!wmItem) {
      Logs.outDev('pinnacle item winning margin not found', id, type, action, side, ratio);
      return null;
    }
    const { id: contestantId, lineId, price } = wmItem;
    return { leagueId, eventId, specialId, contestantId, lineId, odds: price };
  }

  else if (type === 'ot' && exactTotalGoals) {
    const ratioKey = parseRatio(ratio);
    const { id: specialId } = exactTotalGoals;
    const otItem = exactTotalGoals.contestants.find(contestant => contestant.name == ratioKey);
    if (!otItem) {
      Logs.outDev('pinnacle item exact total goals not found', id, type, action, side, ratio);
      return null;
    }
    const { id: contestantId, lineId, price } = otItem;
    return { leagueId, eventId, specialId, contestantId, lineId, odds: price };
  }

  else {
    Logs.outDev('pinnacle ior type not found', ior, id);
    return null;
  }
}

/**
 * 获取平台盘口id信息
 */
export const getPlatformIorInfo = async (ior, platform, id) => {
  const getInfo = {
    polymarket() {
      return getPolymarketIorInfo(ior, id);
    },
    pinnacle() {
      return getPinnacleIorInfo(ior, id);
    }
  }
  Logs.outDev('getPlatformIorInfo', { ior, platform, id });
  return getInfo[platform]?.();
}


/**
 * 获取polymarket盘口详细信息
 */
const getPolymarketIorDetailInfo = async (info) => {
  const { id } = info;
  return getOrderBook(id);
}

/**
 * 获取pinnacle盘口详细信息
 */
const getPinnacleIorDetailInfo = async (info) => {
  return getLineInfo(info);
}

/**
 * 获取平台盘口详细信息
 */
export const getPlatformIorsDetailInfo = async (ior, platform, id) => {
  const info = await getPlatformIorInfo(ior, platform, id);
  if (!info) {
    return Promise.reject(new Error('platform ior info not found', { cause: 400 }));
  }
  const getInfo = {
    polymarket() {
      return getPolymarketIorDetailInfo(info);
    },
    pinnacle() {
      return getPinnacleIorDetailInfo(info);
    }
  }
  return getInfo[platform]?.();
}

/**
 * 根据最新赔率获取策略
 */
export const getSolutionByLatestIors = (iorsInfo, cross_type, retry=false) => {
  const askIndex = +retry;
  const iorsValues = iorsInfo.map(item => {
    if (item.asks) {
      const bestAsk = [...item.asks].sort((a, b) => a.price - b.price)[askIndex];
      const value = fixFloat(1 / bestAsk.price, 3);
      const maxStake = fixFloat(bestAsk.size * bestAsk.price * USDC_RATE);
      const minStake = fixFloat(item.min_order_size * bestAsk.price * USDC_RATE);
      return { value, maxStake, minStake, bestPrice: bestAsk.price };
    }
    else if (item.info) {
      const value = item.info.price;
      const maxStake = Math.floor(item.info.maxRiskStake);
      const minStake = Math.ceil(item.info.minRiskStake*10);
      return { value, maxStake, minStake };
    }
  });

  const nullIndex = iorsValues.findIndex(item => item.value == null);

  if (nullIndex >= 0) {
    return { error: `IORS_NULL_VALUE_AT_INDEX_${nullIndex}_RETRY_${askIndex}`, data: iorsInfo };
  }

  if (iorsValues.length === 2) {
    iorsValues.push({ value: 1, maxStake: 0, minStake: 0 });
  }

  const baseIndex = iorsValues.reduce((minIdx, cur, idx) => cur.value < iorsValues[minIdx].value ? idx : minIdx, 0);

  const betInfo = {
    cross_type,
    base_index: baseIndex,
    base_stake: 10000,
    odds_side_a: fixFloat(iorsValues[0].value - 1),
    odds_side_b: fixFloat(iorsValues[1].value - 1),
    odds_side_c: fixFloat(iorsValues[2].value - 1),
  };

  const sol = eventSolutions(betInfo, true);
  const { win_average, win_profit_rate, gold_side_a, gold_side_b, gold_side_c } = sol;

  if (win_profit_rate < MIN_PROFIT_RATE) {
    Logs.outDev('win_profit_rate is less than profit rate limit', sol, iorsValues, iorsInfo, cross_type);
    return { error: `WIN_PROFIT_RATE_LESS_THAN_MIN_PROFIT_RATE_RETRY_${askIndex}`, data: { sol, iorsValues, iorsInfo } };
  }

  const goldRatios = [gold_side_a, gold_side_b];
  if (gold_side_c) {
    goldRatios.push(gold_side_c);
  }
  const minVals = iorsValues.map(item => item.minStake);
  const maxVals = iorsValues.map(item => item.maxStake);

  const stakeLimit = findMaxMinGroup(goldRatios, minVals, maxVals);
  const { scaleForMax, scaleForMin } = stakeLimit;

  if (scaleForMax < scaleForMin) {
    Logs.outDev('scaleForMax is less than scaleForMin');
    if (!retry) {
      return getSolutionByLatestIors(iorsInfo, cross_type, true);
    }
    else {
      return { error: `NO_ENOUGH_STAKE_SIZE_TO_BET_RETRY_${askIndex}`, data: { sol, iorsValues, iorsInfo } };
    }
  }

  const winLimit = {
    max: fixFloat(win_average * scaleForMax / (gold_side_a + gold_side_b + gold_side_c)),
    min: fixFloat(win_average * scaleForMin / (gold_side_a + gold_side_b + gold_side_c)),
  }

  return { sol, iors: iorsValues, stakeLimit, winLimit };
}

export const getSoulutionBetResult = async ({ iors, iorsInfo, stakeLimit, stake=0 }) => {
  const maxStake = stakeLimit.maxGroup.reduce((acc, curr) => acc + curr, 0);
  const minStake = stakeLimit.minGroup.reduce((acc, curr) => acc + curr, 0);
  let betStakeGroup = [];
  if (stake > maxStake || stake < 0) {
    stake = maxStake;
    betStakeGroup = stakeLimit.maxGroup;
  }
  else if (stake < minStake) {
    stake = minStake;
    betStakeGroup = stakeLimit.minGroup;
  }
  else {
    betStakeGroup = stakeLimit.proportions.map(p => p * stake);
  }

  const betInfo = iorsInfo.map((item, index) => {
    if (item.asks) {
      const bestPrice = +iors[index].bestPrice;
      const stakeSize = fixFloat(betStakeGroup[index] / USDC_RATE / bestPrice, 0); // 必须保证买单金额小数不超过2位
      return { ...item, stakeSize, bestPrice, betIndex: index, platform: 'polymarket' }
    }
    else if (item.info) {
      const stakeSize = fixFloat(betStakeGroup[index], 0);
      return { ...item, stakeSize, betIndex: index, platform: 'pinnacle' }
    }
  }).sort((a, b) => {
    if (a.platform === 'polymarket' && b.platform === 'pinnacle') {
      return -1;
    }
    else if (a.platform === 'pinnacle' && b.platform === 'polymarket') {
      return 1;
    }
    else {
      return 0;
    }
  });

  // return { betInfo };
  return runSequentially(betInfo.map(item => async() => {
    if (item.asks) {
      const result = await polymarketPlaceOrder(item);
      return [result, item.betIndex]
    }
    else if (item.info) {
      const result = await pinnaclePlaceOrder(item);
      return [result, item.betIndex]
    }
  })).then(results => {
    return results.sort((a, b) => a[1] - b[1]).map(item => item[0]);
  }).catch(error => {
    Logs.errDev(error);
    return Promise.reject(error);
  });
}