const web3 = require('hardhat').web3
const logger = require("../../utils/logger")
const BigNumber = require('ethers').BigNumber
const replaceAll = require("hardhat/internal/util/strings").replaceAll
const Time = require("../../utils/time")
const Chain = require("../../model/chain")
const ierc20abi = require('../../abi/IERC20_ABI.json')
const contracts = require('../../config/contracts')

class LpGenerate {
  tokenInstance = {}
  lpInstance = {}

  async handlePosition(routerObj) {
    const block = routerObj.type === 'univ2' ? 'UNIV2DEX' : 'UNIV3DEX'
    const hash = routerObj.type === 'univ2' ? routerObj.factory : routerObj.router + '_router'

    try {
      // 拉取当前pull状态信息
      const pullState = await History.findByHashOrBlockOrDataVague(block, hash, '', 0, 200)
      let nowPosition = 0

      // 没有状态信息的情况
      if (pullState.data.length == 0) {
        await History.appendOrUpdate(block, hash, {"next": 0})
      } else {
        nowPosition = pullState.data[0].dataObj.next
      }

      return nowPosition
    } catch (e) {
      logger.error(`Pull state error, router: ${routerObj.router}, factory: ${routerObj.factory}`)
      logger.error(e)
    }

    return 0
  }

  async getV2PoolByPosition(routerObj, position, v2ToolBy410) {
    try {
      const info = await v2ToolBy410.methods.getPairIdInfo(routerObj.factory, position).call()

      const symbol0 = info['2'].replace(/[^A-Za-z0-9]+/g, '').substring(0, 10)
      const symbol1 = info['6'].replace(/[^A-Za-z0-9]+/g, '').substring(0, 10)
      const name = `${routerObj.name}_${symbol0}_${symbol1}`
      const sum2 = replaceAll(BigNumber.from(info['1']).add(BigNumber.from(info['5']))._hex, '0x0', '0x')

      return {
        LP: info['0'],
        decimals0: info['3'],
        decimals1: info['7'],
        factory: routerObj.factory,
        feei: routerObj.fee,
        id: position,
        name: name,
        r0: info['4'],
        r1: info['8'],
        router: routerObj.router,
        sum2: sum2,
        symbol0: symbol0,
        symbol1: symbol1,
        token0: info['1'],
        token1: info['5']
      }
    } catch (e) {
      logger.info(e)
    }

    return undefined
  }

  async handleToken(pool, zero) {
    const token = {
      'address': zero ? pool.token0 : pool.token1,
      'symbol': zero ? pool.symbol0 : pool.symbol1,
      'decimals': zero ? pool.decimals0 : pool.decimals1,
      'name': 'xxxxxxxx'
    }

    let tokenObj = this.tokenInstance[token.address]
    if (!tokenObj) {
      tokenObj = new web3.eth.Contract(ierc20abi, token.address)
      this.tokenInstance[token.address] = tokenObj
    }

    token.name = await tokenObj.methods.name().call()
    token.name = token.name.replace(/[^A-Za-z0-9 ]+/g, '').substring(0, 37)

    return token
  }

  async saveToken(lp, type = 'token') {
    try {
      const token = await this.handleToken(lp, true)

      // token的hash不同时为lp的情况才更新
      if (!this.lpInstance[token.address.toLowerCase()]) {
        await history.appendOrUpdate(type, token.address, token)
      }
    } catch (e) {
    }

    try {
      const token = await this.handleToken(lp, false)

      // token的hash不同时为lp的情况才更新
      if (!this.lpInstance[token.address.toLowerCase()]) {
        await history.appendOrUpdate(type, token.address, token)
      }
    } catch (e) {
    }
  }

  async saveLp(lp, type = '0') {
    // 本地lp实例存档
    this.lpInstance[lp.LP.toLowerCase()] = lp

    await History.appendOrUpdate(type, lp.LP, lp)
  }

  parseFactory(router, factoryAbi, factoryAddress) {
    if (router.factoryObj == null) {
      router.factoryObj = new web3.eth.Contract(factoryAbi, factoryAddress)
    }

    return router.factoryObj
  }

  async handleLp(position, pairsLength, routerObj, v2ToolBy410) {
    // 1. 获取lp
    let lp = undefined
    if (routerObj.type === 'univ2') {
      lp = await this.getV2PoolByPosition(routerObj, position, v2ToolBy410)
    }

    if (lp) {
      // 2. 保存Lp信息
      await this.saveLp(lp, 'lp')
      // 3. 保存Lp的Token到Token表
      await this.saveToken(lp, 'token')
    }

    if (lp) {
      logger.debug(`${position + 1} / ${pairsLength}, ${lp.name}-${lp.LP}-${routerObj.chain}`)
    } else {
      logger.debug(`lp get filed. ${position + 1} / ${pairsLength}, ${routerObj.name}-${routerObj.router}-${routerObj.chain}`)
    }
  }

  async run() {
    logger.debug('Pull lp start.')

    // 初始化410 v2工具箱
    const v2ToolBy410Abi = require('../../abi/410_V2_TOOLS.json')
    const v2ToolBy410 = new web3.eth.Contract(v2ToolBy410Abi, contracts.V2_TOOLS_BY_410)
    const v2FactoryAbi = require('../../abi/UNIV2_FACTORY_ABI.json')
    // router
    const routerList = require('../../config/router-list.json')

    while (true) {
      for (const routerObj of routerList) {
        try {
          let pairsLength = 0

          const factoryAddress = routerObj.factory
          // 获取当前pull状态
          let position = await this.handlePosition(routerObj)
          let v2Factory = undefined
          // v2，v3分开处理
          if (routerObj.type === 'univ2') {
            // 获取工厂实例
            v2Factory = this.parseFactory(routerObj, v2FactoryAbi, factoryAddress)
            // 获取当前pairsLength
            pairsLength = await v2Factory.methods.allPairsLength().call()
          }
          // 如果有未获取的池子
          const haveNewLp = position < pairsLength

          // 打印信息
          if (haveNewLp) {
            logger.debug(`Router address: ${routerObj.router}`)
            if (routerObj.type === 'univ2') {
              logger.debug(`factory: ${factoryAddress}, ${position} / ${pairsLength}.`)
            } else {
              logger.debug(`position: ${routerObj.position}, ${position} / ${pairsLength}.`)
            }
          }

          // 挨个处理lp信息
          for (; position < pairsLength; position++) {
            await this.handleLp(position, pairsLength, routerObj, v2ToolBy410)
          }

          if (haveNewLp) {
            if (routerObj.type === 'univ2') {
              await History.appendOrUpdate('UNIV2DEX', routerObj.factory, {"next": position})
            }

            logger.debug('')
            logger.debug('')
            logger.debug('')
          }
        } catch (e) {
          logger.debug(e)
        }
      }

      await Time.delay(12000)
    }
  }
}

async function main() {
  logger.info(await Chain.getAll())
}

main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
})