import React from 'react';
import { Field, Form, Formik } from 'formik';
import useSWR from 'swr';
import LoadingSpinner from '../../../Common/LoadingSpinner';
import Button from '../../../Common/Button';
import { defineMessages, useIntl } from 'react-intl';
import axios from 'axios';
import * as Yup from 'yup';
import { useToasts } from 'react-toast-notifications';
import Alert from '../../../Common/Alert';
import NotificationTypeSelector from '../../../NotificationTypeSelector';

const messages = defineMessages({
  save: 'Save Changes',
  saving: 'Saving…',
  agentenabled: 'Enable Agent',
  webhookUrl: 'Webhook URL',
  validationWebhookUrlRequired: 'You must provide a webhook URL',
  webhookUrlPlaceholder: 'Webhook URL',
  slacksettingssaved: 'Slack notification settings saved!',
  slacksettingsfailed: 'Slack notification settings failed to save.',
  testsent: 'Test notification sent!',
  test: 'Test',
  settingupslack: 'Setting Up Slack Notifications',
  settingupslackDescription:
    'To use Slack notifications, you will need to create an <WebhookLink>Incoming Webhook</WebhookLink> integration and use the provided webhook URL below.',
  notificationtypes: 'Notification Types',
});

const NotificationsSlack: React.FC = () => {
  const intl = useIntl();
  const { addToast } = useToasts();
  const { data, error, revalidate } = useSWR(
    '/api/v1/settings/notifications/slack'
  );

  const NotificationsSlackSchema = Yup.object().shape({
    webhookUrl: Yup.string().required(
      intl.formatMessage(messages.validationWebhookUrlRequired)
    ),
  });

  if (!data && !error) {
    return <LoadingSpinner />;
  }

  return (
    <>
      <Alert title={intl.formatMessage(messages.settingupslack)} type="info">
        {intl.formatMessage(messages.settingupslackDescription, {
          WebhookLink: function WebhookLink(msg) {
            return (
              <a
                href="https://my.slack.com/services/new/incoming-webhook/"
                className="text-indigo-100 hover:text-white hover:underline"
                target="_blank"
                rel="noreferrer"
              >
                {msg}
              </a>
            );
          },
        })}
      </Alert>
      <Formik
        initialValues={{
          enabled: data.enabled,
          types: data.types,
          webhookUrl: data.options.webhookUrl,
        }}
        validationSchema={NotificationsSlackSchema}
        onSubmit={async (values) => {
          try {
            await axios.post('/api/v1/settings/notifications/slack', {
              enabled: values.enabled,
              types: values.types,
              options: {
                webhookUrl: values.webhookUrl,
              },
            });
            addToast(intl.formatMessage(messages.slacksettingssaved), {
              appearance: 'success',
              autoDismiss: true,
            });
          } catch (e) {
            addToast(intl.formatMessage(messages.slacksettingsfailed), {
              appearance: 'error',
              autoDismiss: true,
            });
          } finally {
            revalidate();
          }
        }}
      >
        {({
          errors,
          touched,
          isSubmitting,
          values,
          isValid,
          setFieldValue,
        }) => {
          const testSettings = async () => {
            await axios.post('/api/v1/settings/notifications/slack/test', {
              enabled: true,
              types: values.types,
              options: {
                webhookUrl: values.webhookUrl,
              },
            });

            addToast(intl.formatMessage(messages.testsent), {
              appearance: 'info',
              autoDismiss: true,
            });
          };

          return (
            <Form>
              <div className="sm:grid sm:grid-cols-3 sm:gap-4 sm:items-start sm:border-t sm:border-gray-200">
                <label
                  htmlFor="isDefault"
                  className="block text-sm font-medium leading-5 text-gray-400 sm:mt-px"
                >
                  {intl.formatMessage(messages.agentenabled)}
                </label>
                <div className="mt-1 sm:mt-0 sm:col-span-2">
                  <Field
                    type="checkbox"
                    id="enabled"
                    name="enabled"
                    className="w-6 h-6 text-indigo-600 transition duration-150 ease-in-out rounded-md form-checkbox"
                  />
                </div>
              </div>
              <div className="mt-6 sm:mt-5 sm:grid sm:grid-cols-3 sm:gap-4 sm:items-start sm:border-t sm:border-gray-800">
                <label
                  htmlFor="name"
                  className="block text-sm font-medium leading-5 text-gray-400 sm:mt-px"
                >
                  {intl.formatMessage(messages.webhookUrl)}
                </label>
                <div className="mt-1 sm:mt-0 sm:col-span-2">
                  <div className="flex max-w-lg rounded-md shadow-sm">
                    <Field
                      id="webhookUrl"
                      name="webhookUrl"
                      type="text"
                      placeholder={intl.formatMessage(
                        messages.webhookUrlPlaceholder
                      )}
                      className="flex-1 block w-full min-w-0 transition duration-150 ease-in-out bg-gray-700 border border-gray-500 rounded-md form-input sm:text-sm sm:leading-5"
                    />
                  </div>
                  {errors.webhookUrl && touched.webhookUrl && (
                    <div className="mt-2 text-red-500">{errors.webhookUrl}</div>
                  )}
                </div>
              </div>
              <div className="mt-6">
                <div role="group" aria-labelledby="label-permissions">
                  <div className="sm:grid sm:grid-cols-3 sm:gap-4 sm:items-baseline">
                    <div>
                      <div
                        className="text-base font-medium leading-6 text-gray-400 sm:text-sm sm:leading-5"
                        id="label-types"
                      >
                        {intl.formatMessage(messages.notificationtypes)}
                      </div>
                    </div>
                    <div className="mt-4 sm:mt-0 sm:col-span-2">
                      <div className="max-w-lg">
                        <NotificationTypeSelector
                          currentTypes={values.types}
                          onUpdate={(newTypes) =>
                            setFieldValue('types', newTypes)
                          }
                        />
                      </div>
                    </div>
                  </div>
                </div>
              </div>
              <div className="pt-5 mt-8 border-t border-gray-700">
                <div className="flex justify-end">
                  <span className="inline-flex ml-3 rounded-md shadow-sm">
                    <Button
                      buttonType="warning"
                      disabled={isSubmitting || !isValid}
                      onClick={(e) => {
                        e.preventDefault();

                        testSettings();
                      }}
                    >
                      {intl.formatMessage(messages.test)}
                    </Button>
                  </span>
                  <span className="inline-flex ml-3 rounded-md shadow-sm">
                    <Button
                      buttonType="primary"
                      type="submit"
                      disabled={isSubmitting || !isValid}
                    >
                      {isSubmitting
                        ? intl.formatMessage(messages.saving)
                        : intl.formatMessage(messages.save)}
                    </Button>
                  </span>
                </div>
              </div>
            </Form>
          );
        }}
      </Formik>
    </>
  );
};

export default NotificationsSlack;
