import { findTokenById } from "@ledgerhq/cryptoassets";
import type { CryptoCurrency, TokenCurrency } from "@ledgerhq/types-cryptoassets";
import type { Account, TokenAccount } from "@ledgerhq/types-live";
import BigNumber from "bignumber.js";
import { getCryptoCurrencyById } from "../../../currencies";
import { genAccount } from "../../../mock/account";
import {
  getAccountTuplesForCurrency,
  getAvailableAccountsById,
  getNoticeType,
  getProviderName,
  isRegistrationRequired,
} from "./index";

/* TODO: Refacto these two function and move them to mock/account.ts if needed */
function* accountGenerator(currency: CryptoCurrency): Generator<Account> {
  let id = 0;
  while (true) {
    id += 1;
    yield genAccount(`mocked-account-${id}`, { currency, operationsSize: 0 });
  }
}
const getAccountCreator = (currencyId: string) => {
  const generator = accountGenerator(getCryptoCurrencyById(currencyId));
  return () => generator.next().value;
};

describe("swap/utils/getAccountTuplesForCurrency", () => {
  const getEthAccount = getAccountCreator("ethereum");
  const getBtcAccount = getAccountCreator("bitcoin");
  const getPolkadotAccount = getAccountCreator("polkadot");
  const getCosmosAccount = getAccountCreator("cosmos");

  describe("CryptoCurrency", () => {
    test("returns all accounts associated to the CryptoCurrency", () => {
      const ethCurrency = getCryptoCurrencyById("ethereum");
      const ethAccounts = [getEthAccount(), getEthAccount()];
      const allAccounts: Account[] = [
        getCosmosAccount(),
        ...ethAccounts,
        getBtcAccount(),
        getPolkadotAccount(),
      ];

      const results = getAccountTuplesForCurrency(ethCurrency, allAccounts, false);

      expect(results).toHaveLength(2);
      results.forEach((result, index) => {
        expect(result.account).toEqual(ethAccounts[index]);
        expect(result.subAccount).toBeNull();
      });
    });

    test("returns only associated accounts if they have a balance greater than 0 when the flag is passed", () => {
      const ethCurrency = getCryptoCurrencyById("ethereum");
      const richEthAccounts = [
        { ...getEthAccount(), balance: new BigNumber(10) },
        { ...getEthAccount(), balance: new BigNumber(10) },
      ];
      const poorEthAccounts = { ...getEthAccount(), balance: new BigNumber(0) };

      const allAccounts: Account[] = [
        getCosmosAccount(),
        ...richEthAccounts,
        poorEthAccounts,
        getBtcAccount(),
        getPolkadotAccount(),
      ];

      const results = getAccountTuplesForCurrency(ethCurrency, allAccounts, true);

      expect(results).toHaveLength(richEthAccounts.length);
      results.forEach((result, index) => {
        expect(result.account).toEqual(richEthAccounts[index]);
        expect(result.subAccount).toBeNull();
      });
    });

    test("returns an empty array if the CryptoCurrency passed has no associated account", () => {
      const ethCurrency = getCryptoCurrencyById("ethereum");
      const allAccounts: Account[] = [getCosmosAccount(), getBtcAccount(), getPolkadotAccount()];

      const results = getAccountTuplesForCurrency(ethCurrency, allAccounts, false);

      expect(results).toHaveLength(0);
    });
  });

  describe("TokenCurrency", () => {
    const token = findTokenById("ethereum/erc20/aave");
    if (!token) throw new Error("AAVE token not found");
    const aaveToken = Object.freeze(token);

    test("returns correct parent accounts including a new subAccount when a TokenCurrency is provided", () => {
      const ethAccounts = [
        { ...getEthAccount(), subAccounts: [] },
        { ...getEthAccount(), subAccounts: [] },
      ];
      const allAccounts: Account[] = [
        getCosmosAccount(),
        ...ethAccounts,
        getBtcAccount(),
        getPolkadotAccount(),
      ];

      const results = getAccountTuplesForCurrency(aaveToken, allAccounts, false);

      expect(results).toHaveLength(ethAccounts.length);
      results.forEach((result, index) => {
        expect(result.account).toEqual(ethAccounts[index]);
        expect((result.subAccount as TokenAccount & { token: TokenCurrency }).token).toEqual(
          aaveToken,
        );
      });
    });

    test("returns correct parent accounts including already existing subAccounts when a TokenCurrency is provided", () => {
      const ethAccounts = [{ ...getEthAccount(), subAccounts: [aaveToken] }];
      const allAccounts: Account[] = [
        getCosmosAccount(),
        ...ethAccounts,
        getBtcAccount(),
        getPolkadotAccount(),
      ];

      const results = getAccountTuplesForCurrency(aaveToken, allAccounts, false);

      expect(results).toHaveLength(ethAccounts.length);
      results.forEach((result, index) => {
        expect(result.account).toEqual(ethAccounts[index]);
        expect((result.subAccount as TokenAccount & { token: TokenCurrency }).token).toEqual(
          aaveToken,
        );
      });
    });

    test("returns an empty array when a TokenCurrency is provided but the accounts list is empty", () => {
      const allAccounts: Account[] = [];

      const results = getAccountTuplesForCurrency(aaveToken, allAccounts, false);
      expect(results).toHaveLength(0);
    });
  });
});

describe("swap/utils/getAvailableAccountsById", () => {
  const getEthAccount = getAccountCreator("ethereum");
  const getBtcAccount = getAccountCreator("bitcoin");
  const getPolkadotAccount = getAccountCreator("polkadot");
  const getCosmosAccount = getAccountCreator("cosmos");

  test("return the correct accounts after sorting/filtering them", () => {
    const [disabledAccount, higherBalanceAccount, lowerBalanceAccount, ...accounts] = new Array(6)
      .fill(null)
      .map(getEthAccount);

    // mutate some accounts to test sorting/filtering
    disabledAccount.disabled = true;
    higherBalanceAccount.balance = new BigNumber(10);
    lowerBalanceAccount.balance = new BigNumber(2);

    const allAccounts: Account[] = [
      getCosmosAccount(),
      disabledAccount,
      higherBalanceAccount,
      lowerBalanceAccount,
      ...accounts,
      getBtcAccount(),
      getPolkadotAccount(),
    ];

    const results = getAvailableAccountsById("ethereum", allAccounts);
    expect(results).toHaveLength(5);
    expect(results[0].balance.toNumber()).toBeGreaterThan(0);
    expect(results[1].balance.toNumber()).toBeGreaterThan(0);
    expect(results[0].balance.toNumber()).toBeGreaterThan(results[1].balance.toNumber());
  });
});

describe("swap/utils/isRegistrationRequired", () => {
  test("should return registration is not required for changelly", async () => {
    const expectedResult = false;

    const result = await isRegistrationRequired("changelly");

    expect(result).toBe(expectedResult);
  });
});

describe("swap/utils/getProviderName", () => {
  test("should return capitalized provider name for 1inch", () => {
    const expectedResult = "1inch";

    const result = getProviderName("oneinch");

    expect(result).toBe(expectedResult);
  });

  test("should return CIC provider name for cic", () => {
    const expectedResult = "CIC";

    const result = getProviderName("cic");

    expect(result).toBe(expectedResult);
  });

  test("should return MoonPay provider name for moonpay", () => {
    const expectedResult = "MoonPay";

    const result = getProviderName("moonpay");

    expect(result).toBe(expectedResult);
  });

  test("should return capitalized provider name for other provider", () => {
    const expectedResult = "Changelly";

    const result = getProviderName("changelly");

    expect(result).toBe(expectedResult);
  });
});

describe("swap/utils/getNoticeType", function () {
  test("should return notice type for CIC", () => {
    const expectedResult = { message: "provider", learnMore: false };

    const result = getNoticeType("cic");

    expect(result).toEqual(expectedResult);
  });

  test("should return notice type for Changelly", () => {
    const expectedResult = { message: "provider", learnMore: false };

    const result = getNoticeType("changelly");

    expect(result).toEqual(expectedResult);
  });
});