/*
 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()
  });

});