import React, { useRef, useEffect, useState } from 'react'
import styled from '@emotion/styled'
import { css, keyframes } from '@emotion/react'
import useInterval from '../hooks/useInterval'
import usePrevious from '../hooks/usePrevious'
import { isEqual, getDecimalCount, usdFormatter } from '../utils/'
import {
  ArrowUpIcon,
  ArrowDownIcon,
  SwitchHorizontalIcon,
} from '@heroicons/react/solid'
import { CumulativeSizeIcon, StepSizeIcon } from './icons'
import useMarkPrice from '../hooks/useMarkPrice'
import { ElementTitle } from './styles'
import useMangoStore from '../stores/useMangoStore'
import Tooltip from './Tooltip'
import FloatingElement from './FloatingElement'
import { useOpenOrders } from '../hooks/useOpenOrders'

const Line = styled.div<any>`
  text-align: ${(props) => (props.invert ? 'left' : 'right')};
  height: 100%;
  filter: opacity(40%);
  ${(props) => props['data-width'] && `width: ${props['data-width']};`}
`
const fadeIn = keyframes`
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
`

const FlipCard = styled.div`
  background-color: transparent;
  height: 100%;
  perspective: 1000px;
`

const FlipCardInner = styled.div<any>`
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.8s ease-out;
  transform-style: preserve-3d;
  transform: ${({ flip }) => (flip ? 'rotateY(0deg)' : 'rotateY(180deg)')};
`

const FlipCardFront = styled.div`
  position: absolute;
  width: 100%;
  height: 100%;
`

const FlipCardBack = styled.div`
  position: absolute;
  width: 100%;
  height: 100%;
  transform: rotateY(180deg);
`

const StyledFloatingElement = styled(FloatingElement)`
  animation: ${css`
    ${fadeIn} 1s linear
  `};
  overflow: hidden;
`

const getCumulativeOrderbookSide = (
  orders,
  totalSize,
  maxSize,
  depth,
  backwards = false
) => {
  let cumulative = orders
    .slice(0, depth)
    .reduce((cumulative, [price, size], i) => {
      const cumulativeSize = (cumulative[i - 1]?.cumulativeSize || 0) + size
      cumulative.push({
        price,
        size,
        cumulativeSize,
        sizePercent: Math.round((cumulativeSize / (totalSize || 1)) * 100),
        maxSizePercent: Math.round((size / (maxSize || 1)) * 100),
      })
      return cumulative
    }, [])
  if (backwards) {
    cumulative = cumulative.reverse()
  }
  return cumulative
}

export default function Orderbook({ depth = 8 }) {
  const groupConfig = useMangoStore((s) => s.selectedMangoGroup.config)
  const marketConfig = useMangoStore((s) => s.selectedMarket.config)
  const orderbook = useMangoStore((s) => s.selectedMarket.orderBook)
  const market = useMangoStore((s) => s.selectedMarket.current)
  const markPrice = useMarkPrice()
  const openOrders = useOpenOrders()
  const openOrderPrices = openOrders?.length
    ? openOrders.map(({ order }) => order.price)
    : []

  const currentOrderbookData = useRef(null)
  const lastOrderbookData = useRef(null)
  const previousDepth = usePrevious(depth)

  const [orderbookData, setOrderbookData] = useState(null)
  const [defaultLayout, setDefaultLayout] = useState(true)
  const [displayCumulativeSize, setDisplayCumulativeSize] = useState(false)

  useInterval(() => {
    if (
      !currentOrderbookData.current ||
      JSON.stringify(currentOrderbookData.current) !==
        JSON.stringify(lastOrderbookData.current) ||
      previousDepth !== depth
    ) {
      const bids = orderbook?.bids || []
      const asks = orderbook?.asks || []

      const sum = (total, [, size], index) =>
        index < depth ? total + size : total
      const totalSize = bids.reduce(sum, 0) + asks.reduce(sum, 0)
      const maxSize =
        Math.max(
          ...asks.map(function (a) {
            return a[1]
          })
        ) +
        Math.max(
          ...bids.map(function (b) {
            return b[1]
          })
        )

      const bidsToDisplay = defaultLayout
        ? getCumulativeOrderbookSide(bids, totalSize, maxSize, depth, false)
        : getCumulativeOrderbookSide(bids, totalSize, maxSize, depth / 2, false)
      const asksToDisplay = defaultLayout
        ? getCumulativeOrderbookSide(asks, totalSize, maxSize, depth, false)
        : getCumulativeOrderbookSide(
            asks,
            totalSize,
            maxSize,
            (depth + 1) / 2,
            true
          )

      currentOrderbookData.current = {
        bids: orderbook?.bids,
        asks: orderbook?.asks,
      }
      if (bidsToDisplay[0] || asksToDisplay[0]) {
        const bid = bidsToDisplay[0]?.price
        const ask = defaultLayout
          ? asksToDisplay[0]?.price
          : asksToDisplay[asksToDisplay.length - 1]?.price
        let spread, spreadPercentage
        if (bid && ask) {
          spread = ask - bid
          spreadPercentage = (spread / ask) * 100
        }

        setOrderbookData({
          bids: bidsToDisplay,
          asks: asksToDisplay,
          spread,
          spreadPercentage,
        })
      } else {
        setOrderbookData(null)
      }
    }
  }, 250)

  useEffect(() => {
    lastOrderbookData.current = {
      bids: orderbook?.bids,
      asks: orderbook?.asks,
    }
  }, [orderbook])

  const handleLayoutChange = () => {
    setDefaultLayout(!defaultLayout)
    setOrderbookData((prevState) => ({
      ...orderbookData,
      asks: prevState.asks.reverse(),
    }))
  }

  return (
    <>
      <FlipCard>
        <FlipCardInner flip={defaultLayout}>
          {defaultLayout ? (
            <FlipCardFront>
              <StyledFloatingElement>
                <div className="flex items-center justify-between pb-2.5">
                  <div className="flex relative">
                    <Tooltip
                      content={
                        displayCumulativeSize
                          ? 'Display Step Size'
                          : 'Display Cumulative Size'
                      }
                      className="text-xs py-1"
                    >
                      <button
                        onClick={() => {
                          setDisplayCumulativeSize(!displayCumulativeSize)
                        }}
                        className="flex items-center justify-center rounded-full bg-th-bkg-3 w-8 h-8 hover:text-th-primary focus:outline-none"
                      >
                        {displayCumulativeSize ? (
                          <StepSizeIcon className="w-5 h-5" />
                        ) : (
                          <CumulativeSizeIcon className="w-5 h-5" />
                        )}
                      </button>
                    </Tooltip>
                  </div>
                  <ElementTitle noMarignBottom>Orderbook</ElementTitle>
                  <div className="flex relative">
                    <Tooltip content={'Switch Layout'} className="text-xs py-1">
                      <button
                        onClick={handleLayoutChange}
                        className="flex items-center justify-center rounded-full bg-th-bkg-3 w-8 h-8 hover:text-th-primary focus:outline-none"
                      >
                        <SwitchHorizontalIcon className="w-5 h-5" />
                      </button>
                    </Tooltip>
                  </div>
                </div>
                <MarkPriceComponent markPrice={markPrice} />

                <div
                  className={`text-th-fgd-4 flex justify-between mb-2 text-xs`}
                >
                  <div className={`text-left`}>
                    {displayCumulativeSize ? 'Cumulative ' : ''}Size (
                    {marketConfig.baseSymbol})
                  </div>
                  <div className={`text-center`}>
                    Price ({groupConfig.quoteSymbol})
                  </div>
                  <div className={`text-right`}>
                    {displayCumulativeSize ? 'Cumulative ' : ''}Size (
                    {marketConfig.baseSymbol})
                  </div>
                </div>
                <div className="flex">
                  <div className="w-1/2">
                    {orderbookData?.bids.map(
                      ({
                        price,
                        size,
                        cumulativeSize,
                        sizePercent,
                        maxSizePercent,
                      }) => (
                        <OrderbookRow
                          market={market}
                          hasOpenOrder={openOrderPrices.includes(price)}
                          key={price + ''}
                          price={price}
                          size={displayCumulativeSize ? cumulativeSize : size}
                          side="buy"
                          sizePercent={
                            displayCumulativeSize ? maxSizePercent : sizePercent
                          }
                        />
                      )
                    )}
                  </div>
                  <div className="w-1/2">
                    {orderbookData?.asks.map(
                      ({
                        price,
                        size,
                        cumulativeSize,
                        sizePercent,
                        maxSizePercent,
                      }) => (
                        <OrderbookRow
                          market={market}
                          hasOpenOrder={openOrderPrices.includes(price)}
                          invert
                          key={price + ''}
                          price={price}
                          size={displayCumulativeSize ? cumulativeSize : size}
                          side="sell"
                          sizePercent={
                            displayCumulativeSize ? maxSizePercent : sizePercent
                          }
                        />
                      )
                    )}
                  </div>
                </div>
                <div className="flex justify-between bg-th-bkg-1 p-2 mt-4 rounded-md text-xs">
                  <div className="text-th-fgd-3">Spread</div>
                  <div className="text-th-fgd-1">
                    {orderbookData?.spread?.toFixed(2)}
                  </div>
                  <div className="text-th-fgd-1">
                    {orderbookData?.spreadPercentage?.toFixed(2)}%
                  </div>
                </div>
              </StyledFloatingElement>
            </FlipCardFront>
          ) : (
            <FlipCardBack>
              <StyledFloatingElement>
                <div className="flex items-center justify-between pb-2.5">
                  <div className="flex relative">
                    <Tooltip
                      content={
                        displayCumulativeSize
                          ? 'Display Step Size'
                          : 'Display Cumulative Size'
                      }
                      className="text-xs py-1"
                    >
                      <button
                        onClick={() => {
                          setDisplayCumulativeSize(!displayCumulativeSize)
                        }}
                        className="flex items-center justify-center rounded-full bg-th-bkg-3 w-8 h-8 hover:text-th-primary focus:outline-none"
                      >
                        {displayCumulativeSize ? (
                          <StepSizeIcon className="w-5 h-5" />
                        ) : (
                          <CumulativeSizeIcon className="w-5 h-5" />
                        )}
                      </button>
                    </Tooltip>
                  </div>
                  <ElementTitle noMarignBottom>Orderbook</ElementTitle>
                  <div className="flex relative">
                    <Tooltip content={'Switch Layout'} className="text-xs py-1">
                      <button
                        onClick={handleLayoutChange}
                        className="flex items-center justify-center rounded-full bg-th-bkg-3 w-8 h-8 hover:text-th-primary focus:outline-none"
                      >
                        <SwitchHorizontalIcon className="w-5 h-5" />
                      </button>
                    </Tooltip>
                  </div>
                </div>
                <MarkPriceComponent markPrice={markPrice} />
                <div className={`text-th-fgd-4 flex justify-between mb-2`}>
                  <div className={`text-left text-xs`}>
                    {displayCumulativeSize ? 'Cumulative ' : ''}Size (
                    {marketConfig.baseSymbol})
                  </div>
                  <div className={`text-right text-xs`}>
                    Price ({groupConfig.quoteSymbol})
                  </div>
                </div>
                {orderbookData?.asks.map(
                  ({
                    price,
                    size,
                    cumulativeSize,
                    sizePercent,
                    maxSizePercent,
                  }) => (
                    <OrderbookRow
                      market={market}
                      hasOpenOrder={openOrderPrices.includes(price)}
                      key={price + ''}
                      price={price}
                      size={displayCumulativeSize ? cumulativeSize : size}
                      side="sell"
                      sizePercent={
                        displayCumulativeSize ? maxSizePercent : sizePercent
                      }
                    />
                  )
                )}
                <div className="flex justify-between bg-th-bkg-1 p-2 my-2 rounded-md text-xs">
                  <div className="text-th-fgd-3">Spread</div>
                  <div className="text-th-fgd-1">
                    {orderbookData?.spread.toFixed(2)}
                  </div>
                  <div className="text-th-fgd-1">
                    {orderbookData?.spreadPercentage.toFixed(2)}%
                  </div>
                </div>
                {orderbookData?.bids.map(
                  ({
                    price,
                    size,
                    cumulativeSize,
                    sizePercent,
                    maxSizePercent,
                  }) => (
                    <OrderbookRow
                      market={market}
                      hasOpenOrder={openOrderPrices.includes(price)}
                      key={price + ''}
                      price={price}
                      size={displayCumulativeSize ? cumulativeSize : size}
                      side="buy"
                      sizePercent={
                        displayCumulativeSize ? maxSizePercent : sizePercent
                      }
                    />
                  )
                )}
              </StyledFloatingElement>
            </FlipCardBack>
          )}
        </FlipCardInner>
      </FlipCard>
    </>
  )
}

const OrderbookRow = React.memo<any>(
  ({ side, price, size, sizePercent, invert, hasOpenOrder, market }) => {
    const element = useRef(null)
    const setMangoStore = useMangoStore((s) => s.set)

    useEffect(() => {
      !element.current?.classList.contains('flash') &&
        element.current?.classList.add('flash')
      const id = setTimeout(
        () =>
          element.current?.classList.contains('flash') &&
          element.current?.classList.remove('flash'),
        250
      )
      return () => clearTimeout(id)
    }, [price, size])

    const formattedSize =
      market?.minOrderSize && !isNaN(size)
        ? Number(size).toFixed(getDecimalCount(market.minOrderSize))
        : size

    const formattedPrice =
      market?.tickSize && !isNaN(price)
        ? Number(price).toFixed(getDecimalCount(market.tickSize))
        : price

    const handlePriceClick = () => {
      setMangoStore((state) => {
        state.tradeForm.price = price
      })
    }

    const handleSizeClick = () => {
      setMangoStore((state) => {
        state.tradeForm.baseSize = size
      })
    }

    if (!market) return null

    return (
      <div className={`flex text-sm leading-7 justify-between`} ref={element}>
        {invert ? (
          <>
            <div className={`text-left relative flex-1`}>
              <Line
                invert
                data-width={sizePercent + '%'}
                side={side}
                className={`absolute inset-y-0 left-0 ${
                  side === 'buy' ? `bg-th-green` : `bg-th-red`
                }`}
              />
              <div
                onClick={handlePriceClick}
                className={`z-30 filter brightness-110 relative text-th-fgd-1 px-4 ${
                  side === 'buy' ? `text-th-green` : `text-th-red`
                }`}
              >
                {usdFormatter(
                  formattedPrice,
                  getDecimalCount(market.tickSize),
                  false
                )}
              </div>
            </div>
            <div
              className={`text-right ${
                hasOpenOrder ? 'text-th-primary' : 'text-th-fgd-1'
              }`}
              onClick={handleSizeClick}
            >
              {formattedSize}
            </div>
          </>
        ) : (
          <>
            <div
              className={`text-left flex-1 ${
                hasOpenOrder ? 'text-th-primary' : 'text-th-fgd-1'
              }`}
              onClick={handleSizeClick}
            >
              {formattedSize}
            </div>
            <div className={`text-right relative flex-1`}>
              <Line
                className={`absolute inset-y-0 right-0 ${
                  side === 'buy' ? `bg-th-green` : `bg-th-red`
                }`}
                data-width={sizePercent + '%'}
                side={side}
              />
              <div
                className={`z-30 filter brightness-110 relative px-4 ${
                  side === 'buy' ? `text-th-green` : `text-th-red`
                }`}
                onClick={handlePriceClick}
              >
                {usdFormatter(
                  formattedPrice,
                  getDecimalCount(market.tickSize),
                  false
                )}
              </div>
            </div>
          </>
        )}
      </div>
    )
  },
  (prevProps, nextProps) =>
    isEqual(prevProps, nextProps, ['price', 'size', 'sizePercent'])
)

const MarkPriceComponent = React.memo<{ markPrice: number }>(
  ({ markPrice }) => {
    const previousMarkPrice: number = usePrevious(markPrice)

    return (
      <div
        className={`flex justify-center items-center font-bold text-lg pb-4 ${
          markPrice > previousMarkPrice
            ? `text-th-green`
            : markPrice < previousMarkPrice
            ? `text-th-red`
            : `text-th-fgd-1`
        }`}
      >
        {markPrice > previousMarkPrice && (
          <ArrowUpIcon className={`h-5 w-5 mr-1 text-th-green`} />
        )}
        {markPrice < previousMarkPrice && (
          <ArrowDownIcon className={`h-5 w-5 mr-1 text-th-red`} />
        )}
        {markPrice || '----'}
      </div>
    )
  },
  (prevProps, nextProps) => isEqual(prevProps, nextProps, ['markPrice'])
)