import { createApi, fetchBaseQuery, FetchBaseQueryError } from '@reduxjs/toolkit/query/react'
import { Protocol } from '@uniswap/router-sdk'
import { ChainId, TradeType } from '@uniswap/sdk-core'
import { isUniswapXSupportedChain } from 'constants/chains'
import { getClientSideQuote } from 'lib/hooks/routing/clientSideSmartOrderRouter'
import ms from 'ms.macro'
import { trace } from 'tracing/trace'

import {
  QuoteMethod,
  QuoteState,
  RouterPreference,
  RoutingConfig,
  SwapRouterNativeAssets,
  TradeResult,
  URAQuoteResponse,
  URAQuoteType,
} from './types'
import { getRouter, isExactInput, shouldUseAPIRouter, transformRoutesToTrade } from './utils'

const UNISWAP_API_URL = process.env.REACT_APP_UNISWAP_API_URL
if (UNISWAP_API_URL === undefined) {
  throw new Error(`UNISWAP_API_URL must be a defined environment variable`)
}

// This is excluded from `RouterPreference` enum because it's only used
// internally for token -> USDC trades to get a USD value.
export const INTERNAL_ROUTER_PREFERENCE_PRICE = 'price' as const

const CLIENT_PARAMS = {
  protocols: [Protocol.V2, Protocol.V3, Protocol.MIXED],
}

export interface GetQuoteArgs {
  tokenInAddress: string
  tokenInChainId: ChainId
  tokenInDecimals: number
  tokenInSymbol?: string
  tokenOutAddress: string
  tokenOutChainId: ChainId
  tokenOutDecimals: number
  tokenOutSymbol?: string
  amount: string
  account?: string
  routerPreference: RouterPreference | typeof INTERNAL_ROUTER_PREFERENCE_PRICE
  tradeType: TradeType
  needsWrapIfUniswapX: boolean
  uniswapXEnabled: boolean
  uniswapXForceSyntheticQuotes: boolean
  forceUniswapXOn: boolean
  userDisabledUniswapX: boolean
  isRoutingAPIPrice?: boolean
  uniswapXEthOutputEnabled: boolean
}

const protocols: Protocol[] = [Protocol.V2, Protocol.V3, Protocol.MIXED]

// routing API quote query params: https://github.com/Uniswap/routing-api/blob/main/lib/handlers/quote/schema/quote-schema.ts
const DEFAULT_QUERY_PARAMS = {
  protocols,
}

function getRoutingAPIConfig(args: GetQuoteArgs): RoutingConfig {
  const {
    account,
    tradeType,
    tokenOutAddress,
    tokenInChainId,
    uniswapXForceSyntheticQuotes,
    uniswapXEthOutputEnabled,
    routerPreference,
  } = args

  const uniswapx = {
    useSyntheticQuotes: uniswapXForceSyntheticQuotes,
    // Protocol supports swap+send to different destination address, but
    // for now recipient === swapper
    recipient: account,
    swapper: account,
    routingType: URAQuoteType.DUTCH_LIMIT,
  }

  const classic = {
    ...DEFAULT_QUERY_PARAMS,
    routingType: URAQuoteType.CLASSIC,
  }

  const tokenOutIsNative = Object.values(SwapRouterNativeAssets).includes(tokenOutAddress as SwapRouterNativeAssets)

  // UniswapX doesn't support native out, exact-out, or non-mainnet trades (yet),
  // so even if the user has selected UniswapX as their router preference, force them to receive a Classic quote.
  if (
    !args.uniswapXEnabled ||
    (args.userDisabledUniswapX && routerPreference !== RouterPreference.X) ||
    (tokenOutIsNative && !uniswapXEthOutputEnabled) ||
    tradeType === TradeType.EXACT_OUTPUT ||
    !isUniswapXSupportedChain(tokenInChainId)
  ) {
    return [classic]
  }

  return [uniswapx, classic]
}

export const routingApi = createApi({
  reducerPath: 'routingApi',
  baseQuery: fetchBaseQuery({
    baseUrl: UNISWAP_API_URL,
  }),
  endpoints: (build) => ({
    getQuote: build.query<TradeResult, GetQuoteArgs>({
      async onQueryStarted(args: GetQuoteArgs, { queryFulfilled }) {
        trace(
          'quote',
          async ({ setTraceError, setTraceStatus }) => {
            try {
              await queryFulfilled
            } catch (error: unknown) {
              if (error && typeof error === 'object' && 'error' in error) {
                const queryError = (error as Record<'error', FetchBaseQueryError>).error
                if (typeof queryError.status === 'number') {
                  setTraceStatus(queryError.status)
                }
                setTraceError(queryError)
              } else {
                throw error
              }
            }
          },
          {
            data: {
              ...args,
              isPrice: args.routerPreference === INTERNAL_ROUTER_PREFERENCE_PRICE,
              isAutoRouter: args.routerPreference === RouterPreference.API,
            },
          }
        )
      },
      async queryFn(args, _api, _extraOptions, fetch) {
        const fellBack = false
        if (shouldUseAPIRouter(args)) {
          try {
            const {
              tokenInAddress,
              tokenInChainId,
              tokenOutAddress,
              tokenOutChainId,
              amount,
              tradeType,
              forceUniswapXOn,
            } = args
            const type = isExactInput(tradeType) ? 'EXACT_INPUT' : 'EXACT_OUTPUT'

            const requestBody = {
              tokenInChainId,
              tokenIn: tokenInAddress,
              tokenOutChainId,
              tokenOut: tokenOutAddress,
              amount,
              type,
              // if forceUniswapXOn is not ON, then use the backend's default value
              useUniswapX: forceUniswapXOn || undefined,
              configs: getRoutingAPIConfig(args),
            }

            const response = await fetch({
              method: 'POST',
              url: '/quote',
              body: JSON.stringify(requestBody),
            })

            if (response.error) {
              try {
                // cast as any here because we do a runtime check on it being an object before indexing into .errorCode
                const errorData = response.error.data as any
                // NO_ROUTE should be treated as a valid response to prevent retries.
                if (
                  typeof errorData === 'object' &&
                  (errorData?.errorCode === 'NO_ROUTE' || errorData?.detail === 'No quotes available')
                ) {
                  return { data: { state: QuoteState.NOT_FOUND } }
                }
              } catch {
                throw response.error
              }
            }

            const uraQuoteResponse = response.data as URAQuoteResponse
            const tradeResult = await transformRoutesToTrade(args, uraQuoteResponse, QuoteMethod.ROUTING_API)

            return { data: tradeResult }
          } catch (error: any) {
            console.warn(
              `GetQuote failed on Unified Routing API, falling back to client: ${
                error?.message ?? error?.detail ?? error
              }`
            )
          }
        }
        try {
          const method = fellBack ? QuoteMethod.CLIENT_SIDE_FALLBACK : QuoteMethod.CLIENT_SIDE
          const router = getRouter(args.tokenInChainId)
          const quoteResult = await getClientSideQuote(args, router, CLIENT_PARAMS)
          if (quoteResult.state === QuoteState.SUCCESS) {
            return {
              data: await transformRoutesToTrade(args, quoteResult.data, method),
            }
          } else {
            return { data: quoteResult }
          }
        } catch (error: any) {
          console.warn(`GetQuote failed on client: ${error}`)
          return { error: { status: 'CUSTOM_ERROR', error: error?.detail ?? error?.message ?? error } }
        }
      },
      keepUnusedDataFor: ms`10s`,
      extraOptions: {
        maxRetries: 0,
      },
    }),
  }),
})

export const { useGetQuoteQuery } = routingApi
