// source for fees: https://www.paradex.trade/stats
import fetchURL from "../../utils/fetchURL"
import { FetchOptions, FetchResultV2, SimpleAdapter } from "../../adapters/types";
import { CHAIN } from "../../helpers/chains";
import { METRIC } from "../../helpers/metrics";
import { addTokensReceived } from "../../helpers/token";

const PERP_TRADING_FEES = 'Perp Trading Fees'

// Lifetime fees broken down by product. This listing is perps-only, so it reads PERP_FEES.
// The previous source reported whole-exchange fees (perps + options + spot), which double-counted
// the options fees already tracked in fees/paradex-options.
// Row format: [TRADE_DATE, PERP_FEES, PERP_OPTION_FEES, SPOT_FEES, OPTION_FEES, TOTAL_FEE, CUMULATIVE_FEES]
const feesEndpoint = "https://tradeparadigm.metabaseapp.com/api/public/dashboard/e4d7b84d-f95f-48eb-b7a6-141b3dcef4e2/dashcard/20068/card/21188?parameters=%5B%5D"
const PERP_FEES_INDEX = 1

interface IFeesData {
  data: {
    rows: [string, ...number[]][];
  }
}

// https://app.paradex.trade/dime/overview
const ASSISTANCE_FUND = "0xe80c1286a424B09fB9FC1d82afedAf9d4CE8e5f6";
const DIME_TOKEN = "0xb32e10022ffbedfe10bc818a1c7e67d9d87e0fa7";
const PARADEX_BRIDGE = "0xe3cbe3a636ab6a754e9e41b12b09d09ce9e53db3";

const fetchParadex = async (options: FetchOptions): Promise<FetchResultV2> => {
  const feesData = await fetchURL(feesEndpoint) as IFeesData
  const fees = feesData.data.rows.find(row => row[0].slice(0, 10) === options.dateString)?.[PERP_FEES_INDEX]
  if (fees == null) throw new Error('record missing!')

  const dailyFees = options.createBalances()
  const dailyUserFees = options.createBalances()
  dailyFees.addUSDValue(fees, PERP_TRADING_FEES)
  dailyUserFees.addUSDValue(fees, PERP_TRADING_FEES)

  return {
    dailyFees,
    dailyUserFees,
    // As there's no reliable source for dailySupplySideRevenue data, in order to
    // avoid reporting incorrect data we do not return dailyRevenue
  };
};

const fetchEth = async (options: FetchOptions): Promise<FetchResultV2> => {
  // Buybacks occur continuously but are only withdrawn to L1 on a weekly basis
  // Tokens come straight from the bridge in a single transaction
  // https://etherscan.io/address/0xe80c1286a424B09fB9FC1d82afedAf9d4CE8e5f6#tokentxns
  const buybacks = await addTokensReceived({
    options,
    tokens: [DIME_TOKEN],
    targets: [ASSISTANCE_FUND],
    fromAddressFilter: PARADEX_BRIDGE,
  });

  const dailyHoldersRevenue = options.createBalances()
  dailyHoldersRevenue.addBalances(buybacks, METRIC.TOKEN_BUY_BACK)

  return {
    dailyHoldersRevenue,
  };
};

const adapter: SimpleAdapter = {
  version: 1,
  adapter: {
    [CHAIN.PARADEX]: {
      fetch: fetchParadex,
      start: '2023-09-01',
    },
    [CHAIN.ETHEREUM]: {
      fetch: fetchEth,
      start: '2026-03-31',
    }
  },
  methodology: {
		Fees: "Perps trading fees paid by traders on Paradex, from the PERP_FEES breakdown of the public Paradex stats dashboard. Options and spot fees are tracked in their own listings.",
    UserFees: "Perps trading fees paid by traders on Paradex.",
    HoldersRevenue: "$DIME purchased with net protocol revenue and withdrawn to the assistance fund."
	},
  breakdownMethodology: {
    Fees: {
      [PERP_TRADING_FEES]: "Perpetual trading fees paid by traders on Paradex, from the PERP_FEES column of the public Paradex stats dashboard.",
    },
    UserFees: {
      [PERP_TRADING_FEES]: "Perpetual trading fees paid by traders on Paradex, from the PERP_FEES column of the public Paradex stats dashboard.",
    },
    HoldersRevenue: {
      [METRIC.TOKEN_BUY_BACK]: "$DIME bought with protocol revenue and sent from the Paradex bridge to the assistance fund.",
    },
  },
  skipBreakdownValidation: true, // Paradex does not publish a supply-side/protocol split, so dailyRevenue is not reported
};

export default adapter;