/*
 This file is part of GNU Taler
 (C) 2022 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/>
 */

import { Amounts, HttpStatusCode, TranslatedString, parsePaytoUri, parseWithdrawUri, stringifyWithdrawUri } from "@gnu-taler/taler-util";
import { RequestError, notify, notifyError, notifyInfo, useTranslationContext, utils } from "@gnu-taler/web-util/browser";
import { useEffect, useState } from "preact/hooks";
import { useAccessAPI, useAccessAnonAPI, useWithdrawalDetails } from "../../hooks/access.js";
import { getInitialBackendBaseURL } from "../../hooks/backend.js";
import { useSettings } from "../../hooks/settings.js";
import { buildRequestErrorMessage } from "../../utils.js";
import { Props, State } from "./index.js";

export function useComponentState({ currency, onClose }: Props): utils.RecursiveState<State> {
  const { i18n } = useTranslationContext();
  const [settings, updateSettings] = useSettings()
  const { createWithdrawal } = useAccessAPI();
  const { abortWithdrawal, confirmWithdrawal } = useAccessAnonAPI();
  const [busy, setBusy] = useState<Record<string, undefined>>()

  const amount = settings.maxWithdrawalAmount

  async function doSilentStart() {
    //FIXME: if amount is not enough use balance
    const parsedAmount = Amounts.parseOrThrow(`${currency}:${amount}`)

    try {
      const result = await createWithdrawal({
        amount: Amounts.stringify(parsedAmount),
      });
      const uri = parseWithdrawUri(result.data.taler_withdraw_uri);
      if (!uri) {
        return notifyError(
          i18n.str`Server responded with an invalid withdraw URI`,
          i18n.str`Withdraw URI: ${result.data.taler_withdraw_uri}`);
      } else {
        updateSettings("currentWithdrawalOperationId", uri.withdrawalOperationId)
      }
    } catch (error) {
      if (error instanceof RequestError) {
        notify(
          buildRequestErrorMessage(i18n, error.cause, {
            onClientError: (status) =>
              status === HttpStatusCode.Forbidden
                ? i18n.str`The operation was rejected due to insufficient funds`
                : undefined,
          }),
        );
      } else {
        notifyError(
          i18n.str`Operation failed, please report`,
          (error instanceof Error
            ? error.message
            : JSON.stringify(error)) as TranslatedString
        )
      }
    }
  }

  const withdrawalOperationId = settings.currentWithdrawalOperationId
  useEffect(() => {
    if (withdrawalOperationId === undefined) {
      doSilentStart()
    }
  }, [settings.fastWithdrawal, amount])

  const baseUrl = getInitialBackendBaseURL()

  if (!withdrawalOperationId) {
    return {
      status: "loading",
      error: undefined
    }
  }

  const wid = withdrawalOperationId

  async function doAbort() {
    try {
      setBusy({})
      await abortWithdrawal(wid);
      onClose();
    } catch (error) {
      if (error instanceof RequestError) {
        notify(
          buildRequestErrorMessage(i18n, error.cause, {
            onClientError: (status) =>
              status === HttpStatusCode.Conflict
                ? i18n.str`The reserve operation has been confirmed previously and can't be aborted`
                : undefined,
          }),
        );
      } else {
        notifyError(
          i18n.str`Operation failed, please report`,
          (error instanceof Error
            ? error.message
            : JSON.stringify(error)) as TranslatedString
        )
      }
    }
    setBusy(undefined)
  }

  async function doConfirm() {
    try {
      setBusy({})
      await confirmWithdrawal(wid);
      if (!settings.showWithdrawalSuccess) {
        notifyInfo(i18n.str`Wire transfer completed!`)
      }
    } catch (error) {
      if (error instanceof RequestError) {
        notify(
          buildRequestErrorMessage(i18n, error.cause, {
            onClientError: (status) =>
              status === HttpStatusCode.Conflict
                ? i18n.str`The withdrawal has been aborted previously and can't be confirmed`
                : status === HttpStatusCode.UnprocessableEntity
                  ? i18n.str`The withdraw operation cannot be confirmed because no exchange and reserve public key selection happened before`
                  : undefined,
          }),
        );
      } else {
        notifyError(
          i18n.str`Operation failed, please report`,
          (error instanceof Error
            ? error.message
            : JSON.stringify(error)) as TranslatedString
        )
      }
    }
    setBusy(undefined)
  }
  const bankIntegrationApiBaseUrl = `${baseUrl}/taler-integration`
  const uri = stringifyWithdrawUri({
    bankIntegrationApiBaseUrl,
    withdrawalOperationId,
  });
  const parsedUri = parseWithdrawUri(uri);
  if (!parsedUri) {
    return {
      status: "invalid-withdrawal",
      error: undefined,
      uri,
      onClose,
    }
  }

  return (): utils.RecursiveState<State> => {
    const result = useWithdrawalDetails(withdrawalOperationId);
    const shouldCreateNewOperation = !result.ok && !result.loading && result.info.status === HttpStatusCode.NotFound

    useEffect(() => {
      if (shouldCreateNewOperation) {
        doSilentStart()
      }
    }, [])
    if (!result.ok) {
      if (result.loading) {
        return {
          status: "loading",
          error: undefined
        }
      }
      if (result.info.status === HttpStatusCode.NotFound) {
        return {
          status: "loading",
          error: undefined,
        }
      }
      return {
        status: "loading-error",
        error: result
      }
    }
    const { data } = result;
    if (data.aborted) {
      return {
        status: "aborted",
        error: undefined,
        onClose: async () => {
          updateSettings("currentWithdrawalOperationId", undefined)
          onClose()
        },
      }
    }

    if (data.confirmation_done) {
      if (!settings.showWithdrawalSuccess) {
        updateSettings("currentWithdrawalOperationId", undefined)
        onClose()
      }
      return {
        status: "confirmed",
        error: undefined,
        onClose: async () => {
          updateSettings("currentWithdrawalOperationId", undefined)
          onClose()
        },
      }
    }

    if (!data.selection_done) {
      return {
        status: "ready",
        error: undefined,
        uri: parsedUri,
        onClose: async () => {
          await doAbort()
          updateSettings("currentWithdrawalOperationId", undefined)
          onClose()
        },
        onAbort: doAbort,
      }
    }

    if (!data.selected_reserve_pub) {
      return {
        status: "invalid-reserve",
        error: undefined,
        reserve: data.selected_reserve_pub,
        onClose,
      }
    }

    const account = !data.selected_exchange_account ? undefined : parsePaytoUri(data.selected_exchange_account)

    if (!account) {
      return {
        status: "invalid-payto",
        error: undefined,
        payto: data.selected_exchange_account,
        onClose,
      }
    }


    // goToConfirmOperation(withdrawalOperationId)
    return {
      status: "need-confirmation",
      error: undefined,
      onAbort: async () => {
        await doAbort()
        updateSettings("currentWithdrawalOperationId", undefined)
        onClose()
      },
      busy: !!busy,
      onConfirm: doConfirm
    }
  }

}