/*
 This file is part of GNU Taler
 (C) 2021 Taler Systems S.A.

 GNU Taler is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software
 Foundation; either version 3, or (at your option) any later version.

 GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

/**
 *
 * @author Sebastian Javier Marchano (sebasjm)
 */

import {
  Amounts,
  Balance,
  BalancesResponse,
  parsePaytoUri,
} from "@gnu-taler/taler-util";
import { DepositGroupFees } from "@gnu-taler/taler-wallet-core/src/operations/deposits";
import { expect } from "chai";
import { mountHook } from "../test-utils.js";
import { useComponentState } from "./DepositPage.js";
import * as wxApi from "../wxApi.js";

const currency = "EUR";
const withoutFee = async (): Promise<DepositGroupFees> => ({
  coin: Amounts.parseOrThrow(`${currency}:0`),
  wire: Amounts.parseOrThrow(`${currency}:0`),
  refresh: Amounts.parseOrThrow(`${currency}:0`),
});

const withSomeFee = async (): Promise<DepositGroupFees> => ({
  coin: Amounts.parseOrThrow(`${currency}:1`),
  wire: Amounts.parseOrThrow(`${currency}:1`),
  refresh: Amounts.parseOrThrow(`${currency}:1`),
});

const freeJustForIBAN = async (account: string): Promise<DepositGroupFees> =>
  /IBAN/i.test(account) ? withoutFee() : withSomeFee();

const someBalance = [
  {
    available: "EUR:10",
  } as Balance,
];

const nullFunction: any = () => null;
type VoidFunction = () => void;

describe("DepositPage states", () => {
  it("should have status 'no-balance' when balance is empty", async () => {
    const { getLastResultOrThrow, waitNextUpdate, assertNoPendingUpdate } =
      mountHook(() =>
        useComponentState(currency, nullFunction, nullFunction, {
          getBalance: async () =>
            ({
              balances: [{ available: `${currency}:0` }],
            } as Partial<BalancesResponse>),
          listKnownBankAccounts: async () => ({ accounts: [] }),
        } as Partial<typeof wxApi> as any),
      );

    {
      const { status } = getLastResultOrThrow();
      expect(status).equal("loading");
    }

    await waitNextUpdate();

    {
      const { status } = getLastResultOrThrow();
      expect(status).equal("no-balance");
    }

    await assertNoPendingUpdate();
  });

  it("should have status 'no-accounts' when balance is not empty and accounts is empty", async () => {
    const { getLastResultOrThrow, waitNextUpdate, assertNoPendingUpdate } =
      mountHook(() =>
        useComponentState(currency, nullFunction, nullFunction, {
          getBalance: async () =>
            ({
              balances: [{ available: `${currency}:1` }],
            } as Partial<BalancesResponse>),
          listKnownBankAccounts: async () => ({ accounts: [] }),
        } as Partial<typeof wxApi> as any),
      );

    {
      const { status } = getLastResultOrThrow();
      expect(status).equal("loading");
    }

    await waitNextUpdate();
    {
      const r = getLastResultOrThrow();
      if (r.status !== "no-accounts") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
    }

    await assertNoPendingUpdate();
  });

  const ibanPayto = parsePaytoUri("payto://iban/ES8877998399652238")!;
  const talerBankPayto = parsePaytoUri(
    "payto://x-taler-bank/ES8877998399652238",
  )!;

  it("should have status 'ready' but unable to deposit ", async () => {
    const { getLastResultOrThrow, waitNextUpdate, assertNoPendingUpdate } =
      mountHook(() =>
        useComponentState(currency, nullFunction, nullFunction, {
          getBalance: async () =>
            ({
              balances: [{ available: `${currency}:1` }],
            } as Partial<BalancesResponse>),
          listKnownBankAccounts: async () => ({ accounts: [ibanPayto] }),
        } as Partial<typeof wxApi> as any),
      );

    {
      const { status } = getLastResultOrThrow();
      expect(status).equal("loading");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("0");
      expect(r.depositHandler.onClick).undefined;
    }

    await assertNoPendingUpdate();
  });

  it("should not be able to deposit more than the balance ", async () => {
    const { getLastResultOrThrow, waitNextUpdate, assertNoPendingUpdate } =
      mountHook(() =>
        useComponentState(currency, nullFunction, nullFunction, {
          getBalance: async () =>
            ({
              balances: [{ available: `${currency}:1` }],
            } as Partial<BalancesResponse>),
          listKnownBankAccounts: async () => ({ accounts: [ibanPayto] }),
          getFeeForDeposit: withoutFee,
        } as Partial<typeof wxApi> as any),
      );

    {
      const { status } = getLastResultOrThrow();
      expect(status).equal("loading");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("0");
      expect(r.depositHandler.onClick).undefined;
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:0`));

      r.amount.onInput("10");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("10");
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:0`));
      expect(r.depositHandler.onClick).undefined;
    }

    await assertNoPendingUpdate();
  });

  it("should calculate the fee upon entering amount ", async () => {
    const { getLastResultOrThrow, waitNextUpdate, assertNoPendingUpdate } =
      mountHook(() =>
        useComponentState(currency, nullFunction, nullFunction, {
          getBalance: async () =>
            ({
              balances: [{ available: `${currency}:1` }],
            } as Partial<BalancesResponse>),
          listKnownBankAccounts: async () => ({ accounts: [ibanPayto] }),
          getFeeForDeposit: withSomeFee,
        } as Partial<typeof wxApi> as any),
      );

    {
      const { status } = getLastResultOrThrow();
      expect(status).equal("loading");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("0");
      expect(r.depositHandler.onClick).undefined;
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:0`));

      r.amount.onInput("10");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("10");
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:3`));
      expect(r.totalToDeposit).deep.eq(Amounts.parseOrThrow(`${currency}:7`));
      expect(r.depositHandler.onClick).undefined;
    }

    await assertNoPendingUpdate();
  });

  it("should calculate the fee upon selecting account ", async () => {
    const { getLastResultOrThrow, waitNextUpdate, assertNoPendingUpdate } =
      mountHook(() =>
        useComponentState(currency, nullFunction, nullFunction, {
          getBalance: async () =>
            ({
              balances: [{ available: `${currency}:1` }],
            } as Partial<BalancesResponse>),
          listKnownBankAccounts: async () => ({
            accounts: [ibanPayto, talerBankPayto],
          }),
          getFeeForDeposit: freeJustForIBAN,
        } as Partial<typeof wxApi> as any),
      );

    {
      const { status } = getLastResultOrThrow();
      expect(status).equal("loading");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("0");
      expect(r.depositHandler.onClick).undefined;
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:0`));

      if (r.account.onChange === undefined) expect.fail();
      r.account.onChange("1");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("1");
      expect(r.amount.value).eq("0");
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:3`));
      expect(r.totalToDeposit).deep.eq(Amounts.parseOrThrow(`${currency}:0`));
      expect(r.depositHandler.onClick).undefined;

      r.amount.onInput("10");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("1");
      expect(r.amount.value).eq("10");
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:3`));
      expect(r.totalToDeposit).deep.eq(Amounts.parseOrThrow(`${currency}:7`));
      expect(r.depositHandler.onClick).undefined;

      if (r.account.onChange === undefined) expect.fail();
      r.account.onChange("0");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("10");
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:0`));
      expect(r.totalToDeposit).deep.eq(Amounts.parseOrThrow(`${currency}:10`));
      expect(r.depositHandler.onClick).undefined;
    }

    await assertNoPendingUpdate();
  });

  it("should be able to deposit if has the enough balance ", async () => {
    const { getLastResultOrThrow, waitNextUpdate, assertNoPendingUpdate } =
      mountHook(() =>
        useComponentState(currency, nullFunction, nullFunction, {
          getBalance: async () =>
            ({
              balances: [{ available: `${currency}:15` }],
            } as Partial<BalancesResponse>),
          listKnownBankAccounts: async () => ({ accounts: [ibanPayto] }),
          getFeeForDeposit: withSomeFee,
        } as Partial<typeof wxApi> as any),
      );

    {
      const { status } = getLastResultOrThrow();
      expect(status).equal("loading");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("0");
      expect(r.depositHandler.onClick).undefined;
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:0`));

      r.amount.onInput("10");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("10");
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:3`));
      expect(r.totalToDeposit).deep.eq(Amounts.parseOrThrow(`${currency}:7`));
      expect(r.depositHandler.onClick).not.undefined;

      r.amount.onInput("13");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("13");
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:3`));
      expect(r.totalToDeposit).deep.eq(Amounts.parseOrThrow(`${currency}:10`));
      expect(r.depositHandler.onClick).not.undefined;

      r.amount.onInput("15");
    }

    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("15");
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:3`));
      expect(r.totalToDeposit).deep.eq(Amounts.parseOrThrow(`${currency}:12`));
      expect(r.depositHandler.onClick).not.undefined;
      r.amount.onInput("17");
    }
    await waitNextUpdate();

    {
      const r = getLastResultOrThrow();
      if (r.status !== "ready") expect.fail();
      expect(r.cancelHandler.onClick).not.undefined;
      expect(r.currency).eq(currency);
      expect(r.account.value).eq("0");
      expect(r.amount.value).eq("17");
      expect(r.totalFee).deep.eq(Amounts.parseOrThrow(`${currency}:3`));
      expect(r.totalToDeposit).deep.eq(Amounts.parseOrThrow(`${currency}:14`));
      expect(r.depositHandler.onClick).undefined;
    }
    await assertNoPendingUpdate();
  });
});