import { PerpMarket, ZERO_BN } from '@blockworks-foundation/mango-client'
import { useState, useMemo } from 'react'
import useMangoStore from '../../stores/useMangoStore'
import Chart from '../Chart'
import BN from 'bn.js'
import { perpContractPrecision } from '../../utils'
import { useTranslation } from 'next-i18next'
import { marketsSelector } from '../../stores/selectors'
import dayjs from 'dayjs'
import TabButtons from 'components/TabButtons'

function calculateFundingRate(
  oldestLongFunding,
  oldestShortFunding,
  latestLongFunding,
  latestShortFunding,
  perpMarket: PerpMarket,
  oraclePrice
) {
  if (!perpMarket || !oraclePrice) return 0.0

  // Averaging long and short funding excludes socialized loss
  const startFunding =
    (parseFloat(oldestLongFunding) + parseFloat(oldestShortFunding)) / 2
  const endFunding =
    (parseFloat(latestLongFunding) + parseFloat(latestShortFunding)) / 2
  const fundingDifference = endFunding - startFunding

  const fundingInQuoteDecimals =
    fundingDifference / Math.pow(10, perpMarket.quoteDecimals)

  // TODO - use avgPrice and discard oraclePrice once stats are better
  // const avgPrice = (latestStat.baseOraclePrice + oldestStat.baseOraclePrice) / 2
  const basePriceInBaseLots =
    oraclePrice * perpMarket.baseLotsToNumber(new BN(1))
  return (fundingInQuoteDecimals / basePriceInBaseLots) * 100
}

export default function StatsPerps({ perpStats, loadPerpStats }) {
  const { t } = useTranslation('common')
  const [selectedAsset, setSelectedAsset] = useState<string>('BTC-PERP')
  const marketConfigs = useMangoStore(
    (s) => s.selectedMangoGroup.config
  ).perpMarkets
  const selectedMarketConfig = marketConfigs?.find(
    (m) => m.name === selectedAsset
  )
  const marketDirectory = useMangoStore(marketsSelector)
  const markets = Object.values(marketDirectory)

  const perpMarkets = useMemo(() => {
    return markets.filter((m) => m instanceof PerpMarket) as PerpMarket[]
  }, [markets])

  const selectedMarket = useMemo(() => {
    if (selectedMarketConfig) {
      return perpMarkets.find((m) =>
        m.publicKey.equals(selectedMarketConfig.publicKey)
      )
    }
  }, [selectedMarketConfig, perpMarkets])

  const perpsData = useMemo(() => {
    if (!perpStats?.length || !selectedMarket) return []

    let selectedStatsData = perpStats.filter(
      (stat) => stat.name === selectedAsset
    )

    if (selectedAsset == 'SOL-PERP') {
      const startTimestamp = 1632160800000
      selectedStatsData = selectedStatsData.filter(
        (stat) => new Date(stat.hourly).getTime() >= startTimestamp
      )
    }

    const perpsData = selectedStatsData.map((x) => {
      return {
        fundingRate: calculateFundingRate(
          x.oldestLongFunding,
          x.oldestShortFunding,
          x.latestLongFunding,
          x.latestShortFunding,
          selectedMarket,
          x.baseOraclePrice
        ),
        openInterest: selectedMarket.baseLotsToNumber(x.openInterest) / 2,
        time: x.hourly,
      }
    })

    if (selectedAsset === 'BTC-PERP') {
      const index = perpsData.findIndex(
        (x) => x.time === '2021-09-15T05:00:00.000Z'
      )
      perpsData.splice(index, 1)
    }

    return perpsData
  }, [selectedAsset, perpStats, selectedMarket])

  if (!selectedMarket) return null

  const progress =
    1 -
    selectedMarket.liquidityMiningInfo.mngoLeft.toNumber() /
      selectedMarket.liquidityMiningInfo.mngoPerPeriod.toNumber()
  const start = selectedMarket.liquidityMiningInfo.periodStart.toNumber()
  const now = Date.now() / 1000
  const elapsed = now - start
  const est = start + elapsed / progress

  const lmi = selectedMarket.liquidityMiningInfo

  const maxDepthUi =
    (lmi.maxDepthBps.toNumber() * selectedMarket.baseLotSize.toNumber()) /
    Math.pow(10, selectedMarket.baseDecimals)

  return (
    <>
      <div className="mb-4 flex flex-row-reverse items-center justify-between md:flex-col md:items-stretch">
        <div className="mb-2">
          <TabButtons
            activeTab={selectedAsset}
            tabs={marketConfigs?.map((m) => ({
              label: m.baseSymbol,
              key: m.name,
            }))}
            onClick={setSelectedAsset}
            showSymbolIcon
          />
        </div>
        <div className="flex items-center text-xl text-th-fgd-1">
          <img
            width="24"
            height="24"
            src={`/assets/icons/${selectedAsset
              .split(/-|\//)[0]
              .toLowerCase()}.svg`}
            className="mr-2.5"
          />
          <h2>
            {selectedAsset.split(/-|\//)[0]} {t('perpetual-futures')}
          </h2>
        </div>
      </div>
      <div className="grid grid-flow-row grid-cols-1 gap-2 pb-8 sm:gap-4 md:grid-cols-2">
        <div
          className="relative rounded-md border border-th-bkg-3 p-4"
          style={{ height: '330px' }}
        >
          <Chart
            title={t('average-funding')}
            xAxis="time"
            yAxis="fundingRate"
            data={perpsData}
            labelFormat={(x) => `${x.toFixed(4)}%`}
            tickFormat={(x) =>
              x.toLocaleString(undefined, { maximumFractionDigits: 4 })
            }
            type="area"
            yAxisWidth={70}
            loading={loadPerpStats}
          />
        </div>
        <div
          className="relative rounded-md border border-th-bkg-3 p-4"
          style={{ height: '330px' }}
        >
          {selectedMarketConfig?.baseSymbol ? (
            <Chart
              title={t('open-interest')}
              xAxis="time"
              yAxis="openInterest"
              data={perpsData}
              labelFormat={(x) =>
                x &&
                x.toLocaleString(undefined, {
                  maximumFractionDigits:
                    perpContractPrecision[selectedMarketConfig.baseSymbol],
                }) +
                  ' ' +
                  selectedMarketConfig.baseSymbol
              }
              type="area"
              loading={loadPerpStats}
            />
          ) : null}
        </div>
      </div>
      {lmi.mngoPerPeriod.gt(ZERO_BN) ? (
        <div className="mb-4">
          <h2 className="mb-4">{t('liquidity-mining')}</h2>
          <div className="grid grid-cols-2 gap-x-3 md:grid-cols-3 lg:grid-cols-6">
            <div className="col-span-1 border-y border-th-bkg-3 py-3">
              <p className="mb-0">{t('depth-rewarded')}</p>
              <div className="text-lg font-bold">
                {maxDepthUi.toLocaleString() + ' '}
                {selectedMarketConfig?.baseSymbol ? (
                  <span className="text-xs font-normal text-th-fgd-3">
                    {selectedMarketConfig.baseSymbol}
                  </span>
                ) : null}
              </div>
            </div>
            <div className="col-span-1 border-y border-th-bkg-3 py-3">
              <p className="mb-0">{t('target-period-length')}</p>
              <div className="text-lg font-bold">
                {(
                  selectedMarket.liquidityMiningInfo.targetPeriodLength.toNumber() /
                  60
                ).toFixed()}{' '}
                {t('minutes')}
              </div>
            </div>
            <div className="col-span-1 border-b border-th-bkg-3 py-3 md:border-y">
              <p className="mb-0">{t('mngo-per-period')}</p>
              <div className="text-lg font-bold">
                {(
                  selectedMarket.liquidityMiningInfo.mngoPerPeriod.toNumber() /
                  Math.pow(10, 6)
                ).toFixed(2)}
              </div>
            </div>
            <div className="col-span-1 border-b border-th-bkg-3 py-3 lg:border-y">
              <p className="mb-0">{t('mngo-left-period')}</p>
              <div className="text-lg font-bold">
                {(
                  selectedMarket.liquidityMiningInfo.mngoLeft.toNumber() /
                  Math.pow(10, 6)
                ).toFixed(2)}
              </div>
            </div>

            <div className="col-span-1 border-b border-th-bkg-3 py-3 lg:border-y">
              <p className="mb-0">{t('est-period-end')}</p>
              <div className="text-lg font-bold">
                {dayjs(est * 1000).format('DD MMM YYYY')}
              </div>
              <div className="text-xs text-th-fgd-3">
                {dayjs(est * 1000).format('h:mma')}
              </div>
            </div>
            <div className="col-span-1 border-b border-th-bkg-3 py-3 lg:border-y">
              <p className="mb-0">{t('period-progress')}</p>
              <div className="text-lg font-bold">
                {(progress * 100).toFixed(2)}%
              </div>
            </div>
          </div>
        </div>
      ) : null}
    </>
  )
}