import { useCallback, useEffect } from 'react';
import { useTranslation } from 'next-i18next';
import { useForm } from 'react-hook-form';

import AdminAppContainer from '~/client/services/AdminAppContainer';
import { toastError, toastSuccess } from '~/client/util/toastr';

import { withUnstatedContainers } from '../../UnstatedUtils';
import { OAuth2Setting } from './OAuth2Setting';
import { SesSetting } from './SesSetting';
import { SmtpSetting } from './SmtpSetting';

type Props = {
  adminAppContainer: AdminAppContainer;
};

const MailSetting = (props: Props) => {
  const { t } = useTranslation(['admin', 'commons']);
  const { adminAppContainer } = props;

  const transmissionMethods = ['smtp', 'ses', 'oauth2'];

  const { register, handleSubmit, reset, watch } = useForm();

  // Watch the transmission method to dynamically switch between SMTP and SES settings
  const currentTransmissionMethod = watch(
    'transmissionMethod',
    adminAppContainer.state.transmissionMethod || 'smtp',
  );

  // Reset form when adminAppContainer state changes
  useEffect(() => {
    reset({
      fromAddress: adminAppContainer.state.fromAddress || '',
      transmissionMethod: adminAppContainer.state.transmissionMethod || 'smtp',
      smtpHost: adminAppContainer.state.smtpHost || '',
      smtpPort: adminAppContainer.state.smtpPort || '',
      smtpUser: adminAppContainer.state.smtpUser || '',
      smtpPassword: adminAppContainer.state.smtpPassword || '',
      sesAccessKeyId: adminAppContainer.state.sesAccessKeyId || '',
      sesSecretAccessKey: adminAppContainer.state.sesSecretAccessKey || '',
      oauth2ClientId: adminAppContainer.state.oauth2ClientId || '',
      oauth2ClientSecret: adminAppContainer.state.oauth2ClientSecret || '',
      oauth2RefreshToken: adminAppContainer.state.oauth2RefreshToken || '',
      oauth2User: adminAppContainer.state.oauth2User || '',
    });
  }, [
    adminAppContainer.state.fromAddress,
    adminAppContainer.state.transmissionMethod,
    adminAppContainer.state.smtpHost,
    adminAppContainer.state.smtpPort,
    adminAppContainer.state.smtpUser,
    adminAppContainer.state.smtpPassword,
    adminAppContainer.state.sesAccessKeyId,
    adminAppContainer.state.sesSecretAccessKey,
    adminAppContainer.state.oauth2ClientId,
    adminAppContainer.state.oauth2ClientSecret,
    adminAppContainer.state.oauth2RefreshToken,
    adminAppContainer.state.oauth2User,
    reset,
  ]);

  const onSubmit = useCallback(
    async (data) => {
      try {
        // Await all setState completions before API call
        await Promise.all([
          adminAppContainer.changeFromAddress(data.fromAddress),
          adminAppContainer.changeTransmissionMethod(data.transmissionMethod),
          adminAppContainer.changeSmtpHost(data.smtpHost),
          adminAppContainer.changeSmtpPort(data.smtpPort),
          adminAppContainer.changeSmtpUser(data.smtpUser),
          adminAppContainer.changeSmtpPassword(data.smtpPassword),
          adminAppContainer.changeSesAccessKeyId(data.sesAccessKeyId),
          adminAppContainer.changeSesSecretAccessKey(data.sesSecretAccessKey),
          adminAppContainer.changeOAuth2ClientId(data.oauth2ClientId),
          adminAppContainer.changeOAuth2ClientSecret(data.oauth2ClientSecret),
          adminAppContainer.changeOAuth2RefreshToken(data.oauth2RefreshToken),
          adminAppContainer.changeOAuth2User(data.oauth2User),
        ]);

        await adminAppContainer.updateMailSettingHandler();
        toastSuccess(
          t('toaster.update_successed', {
            target: t('admin:app_setting.mail_settings'),
            ns: 'commons',
          }),
        );
      } catch (err) {
        toastError(err);
      }
    },
    [adminAppContainer, t],
  );

  async function sendTestEmailHandler() {
    const { adminAppContainer } = props;
    try {
      await adminAppContainer.sendTestEmail();
      toastSuccess(t('admin:app_setting.success_to_send_test_email'));
    } catch (err) {
      toastError(err);
    }
  }

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      {!adminAppContainer.state.isMailerSetup && (
        <div className="alert alert-danger">
          <span className="material-symbols-outlined">error</span>{' '}
          {t('admin:app_setting.mailer_is_not_set_up')}
        </div>
      )}
      <div className="row mb-4">
        <label
          className="col-md-3 col-form-label text-end"
          htmlFor="admin-mail-setting-from-address"
        >
          {t('admin:app_setting.from_e-mail_address')}
        </label>
        <div className="col-md-6">
          <input
            className="form-control"
            type="text"
            placeholder={`${t('eg')} mail@growi.org`}
            id="admin-mail-setting-from-address"
            {...register('fromAddress')}
          />
        </div>
      </div>

      <div className="row mb-2">
        <span className="form-label text-start text-md-end col-md-3 col-form-label">
          {t('admin:app_setting.transmission_method')}
        </span>
        <div className="col-md-6 py-2">
          {transmissionMethods.map((method) => {
            return (
              <div key={method} className="form-check form-check-inline">
                <input
                  type="radio"
                  className="form-check-input"
                  id={`transmission-method-radio-${method}`}
                  value={method}
                  {...register('transmissionMethod')}
                />
                <label
                  className="form-label form-check-label"
                  htmlFor={`transmission-method-radio-${method}`}
                >
                  {t(`admin:app_setting.${method}_label`)}
                </label>
              </div>
            );
          })}
        </div>
      </div>

      {currentTransmissionMethod === 'smtp' && (
        <SmtpSetting register={register} />
      )}
      {currentTransmissionMethod === 'ses' && (
        <SesSetting register={register} />
      )}
      {currentTransmissionMethod === 'oauth2' && (
        <OAuth2Setting register={register} />
      )}

      <div className="row my-3">
        <div className="col-md-3"></div>
        <div className="col-md-9">
          <button
            type="submit"
            className="btn btn-primary"
            disabled={adminAppContainer.state.retrieveError != null}
          >
            {t('Update')}
          </button>
          {adminAppContainer.state.transmissionMethod === 'smtp' && (
            <button
              type="button"
              className="btn btn-secondary ms-4"
              onClick={sendTestEmailHandler}
            >
              {t('admin:app_setting.send_test_email')}
            </button>
          )}
        </div>
      </div>
    </form>
  );
};

/**
 * Wrapper component for using unstated
 */
const MailSettingWrapper = withUnstatedContainers(MailSetting, [
  AdminAppContainer,
]);

export default MailSettingWrapper;