import axios from 'axios';
import { Field, Form, Formik } from 'formik';
import React, { useState } from 'react';
import { defineMessages, useIntl } from 'react-intl';
import { useToasts } from 'react-toast-notifications';
import useSWR from 'swr';
import * as Yup from 'yup';
import globalMessages from '../../../i18n/globalMessages';
import Alert from '../../Common/Alert';
import Badge from '../../Common/Badge';
import Button from '../../Common/Button';
import LoadingSpinner from '../../Common/LoadingSpinner';
import SensitiveInput from '../../Common/SensitiveInput';
import NotificationTypeSelector from '../../NotificationTypeSelector';

const messages = defineMessages({
  validationSmtpHostRequired: 'You must provide a valid hostname or IP address',
  validationSmtpPortRequired: 'You must provide a valid port number',
  agentenabled: 'Enable Agent',
  emailsender: 'Sender Address',
  smtpHost: 'SMTP Host',
  smtpPort: 'SMTP Port',
  enableSsl: 'Enable SSL',
  authUser: 'SMTP Username',
  authPass: 'SMTP Password',
  emailsettingssaved: 'Email notification settings saved successfully!',
  emailsettingsfailed: 'Email notification settings failed to save.',
  toastEmailTestSending: 'Sending email test notification…',
  toastEmailTestSuccess: 'Email test notification sent!',
  toastEmailTestFailed: 'Email test notification failed to send.',
  allowselfsigned: 'Allow Self-Signed Certificates',
  ssldisabletip:
    'SSL should be disabled on standard TLS connections (port 587)',
  senderName: 'Sender Name',
  validationEmail: 'You must provide a valid email address',
  emailNotificationTypesAlertDescription:
    '<strong>Media Requested</strong>, <strong>Media Automatically Approved</strong>, and <strong>Media Failed</strong> email notifications are sent to all users with the <strong>Manage Requests</strong> permission.',
  emailNotificationTypesAlertDescriptionPt2:
    '<strong>Media Approved</strong>, <strong>Media Declined</strong>, and <strong>Media Available</strong> email notifications are sent to the user who submitted the request.',
  pgpPrivateKey: 'PGP Private Key',
  pgpPrivateKeyTip:
    'Sign encrypted email messages using <OpenPgpLink>OpenPGP</OpenPgpLink>',
  validationPgpPrivateKey:
    'You must provide a valid PGP private key if a PGP password is entered',
  pgpPassword: 'PGP Password',
  pgpPasswordTip:
    'Sign encrypted email messages using <OpenPgpLink>OpenPGP</OpenPgpLink>',
  validationPgpPassword:
    'You must provide a PGP password if a PGP private key is entered',
});

export function OpenPgpLink(msg: string): JSX.Element {
  return (
    <a href="https://www.openpgp.org/" target="_blank" rel="noreferrer">
      {msg}
    </a>
  );
}

const NotificationsEmail: React.FC = () => {
  const intl = useIntl();
  const { addToast, removeToast } = useToasts();
  const [isTesting, setIsTesting] = useState(false);
  const { data, error, revalidate } = useSWR(
    '/api/v1/settings/notifications/email'
  );

  const NotificationsEmailSchema = Yup.object().shape(
    {
      emailFrom: Yup.string()
        .when('enabled', {
          is: true,
          then: Yup.string()
            .nullable()
            .required(intl.formatMessage(messages.validationEmail)),
          otherwise: Yup.string().nullable(),
        })
        .email(intl.formatMessage(messages.validationEmail)),
      smtpHost: Yup.string()
        .when('enabled', {
          is: true,
          then: Yup.string()
            .nullable()
            .required(intl.formatMessage(messages.validationSmtpHostRequired)),
          otherwise: Yup.string().nullable(),
        })
        .matches(
          /^(([a-z]|\d|_|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*)?([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])$/i,
          intl.formatMessage(messages.validationSmtpHostRequired)
        ),
      smtpPort: Yup.number()
        .typeError(intl.formatMessage(messages.validationSmtpPortRequired))
        .when('enabled', {
          is: true,
          then: Yup.number().required(
            intl.formatMessage(messages.validationSmtpPortRequired)
          ),
          otherwise: Yup.number().nullable(),
        }),
      pgpPrivateKey: Yup.string()
        .when('pgpPassword', {
          is: (value: unknown) => !!value,
          then: Yup.string()
            .nullable()
            .required(intl.formatMessage(messages.validationPgpPrivateKey)),
          otherwise: Yup.string().nullable(),
        })
        .matches(
          /^-----BEGIN PGP PRIVATE KEY BLOCK-----.+-----END PGP PRIVATE KEY BLOCK-----$/,
          intl.formatMessage(messages.validationPgpPrivateKey)
        ),
      pgpPassword: Yup.string().when('pgpPrivateKey', {
        is: (value: unknown) => !!value,
        then: Yup.string()
          .nullable()
          .required(intl.formatMessage(messages.validationPgpPassword)),
        otherwise: Yup.string().nullable(),
      }),
    },
    [['pgpPrivateKey', 'pgpPassword']]
  );

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

  return (
    <Formik
      initialValues={{
        enabled: data.enabled,
        types: data.types,
        emailFrom: data.options.emailFrom,
        smtpHost: data.options.smtpHost,
        smtpPort: data.options.smtpPort,
        secure: data.options.secure,
        authUser: data.options.authUser,
        authPass: data.options.authPass,
        allowSelfSigned: data.options.allowSelfSigned,
        senderName: data.options.senderName,
        pgpPrivateKey: data.options.pgpPrivateKey,
        pgpPassword: data.options.pgpPassword,
      }}
      validationSchema={NotificationsEmailSchema}
      onSubmit={async (values) => {
        try {
          await axios.post('/api/v1/settings/notifications/email', {
            enabled: values.enabled,
            types: values.types,
            options: {
              emailFrom: values.emailFrom,
              smtpHost: values.smtpHost,
              smtpPort: Number(values.smtpPort),
              secure: values.secure,
              authUser: values.authUser,
              authPass: values.authPass,
              allowSelfSigned: values.allowSelfSigned,
              senderName: values.senderName,
              pgpPrivateKey: values.pgpPrivateKey,
              pgpPassword: values.pgpPassword,
            },
          });

          addToast(intl.formatMessage(messages.emailsettingssaved), {
            appearance: 'success',
            autoDismiss: true,
          });
        } catch (e) {
          addToast(intl.formatMessage(messages.emailsettingsfailed), {
            appearance: 'error',
            autoDismiss: true,
          });
        } finally {
          revalidate();
        }
      }}
    >
      {({ errors, touched, isSubmitting, values, isValid, setFieldValue }) => {
        const testSettings = async () => {
          setIsTesting(true);
          let toastId: string | undefined;
          try {
            addToast(
              intl.formatMessage(messages.toastEmailTestSending),
              {
                autoDismiss: false,
                appearance: 'info',
              },
              (id) => {
                toastId = id;
              }
            );
            await axios.post('/api/v1/settings/notifications/email/test', {
              enabled: true,
              types: values.types,
              options: {
                emailFrom: values.emailFrom,
                smtpHost: values.smtpHost,
                smtpPort: Number(values.smtpPort),
                secure: values.secure,
                authUser: values.authUser,
                authPass: values.authPass,
                senderName: values.senderName,
                pgpPrivateKey: values.pgpPrivateKey,
                pgpPassword: values.pgpPassword,
              },
            });

            if (toastId) {
              removeToast(toastId);
            }
            addToast(intl.formatMessage(messages.toastEmailTestSuccess), {
              autoDismiss: true,
              appearance: 'success',
            });
          } catch (e) {
            if (toastId) {
              removeToast(toastId);
            }
            addToast(intl.formatMessage(messages.toastEmailTestFailed), {
              autoDismiss: true,
              appearance: 'error',
            });
          } finally {
            setIsTesting(false);
          }
        };

        return (
          <>
            <Alert
              title={
                <>
                  <p className="mb-2">
                    {intl.formatMessage(
                      messages.emailNotificationTypesAlertDescription,
                      {
                        strong: function strong(msg) {
                          return (
                            <strong className="font-semibold text-indigo-100">
                              {msg}
                            </strong>
                          );
                        },
                      }
                    )}
                  </p>
                  <p>
                    {intl.formatMessage(
                      messages.emailNotificationTypesAlertDescriptionPt2,
                      {
                        strong: function strong(msg) {
                          return (
                            <strong className="font-semibold text-indigo-100">
                              {msg}
                            </strong>
                          );
                        },
                      }
                    )}
                  </p>
                </>
              }
              type="info"
            />
            <Form className="section">
              <div className="form-row">
                <label htmlFor="enabled" className="checkbox-label">
                  {intl.formatMessage(messages.agentenabled)}
                </label>
                <div className="form-input">
                  <Field type="checkbox" id="enabled" name="enabled" />
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="emailFrom" className="text-label">
                  {intl.formatMessage(messages.emailsender)}
                  <span className="label-required">*</span>
                </label>
                <div className="form-input">
                  <div className="form-input-field">
                    <Field
                      id="emailFrom"
                      name="emailFrom"
                      type="text"
                      placeholder="no-reply@example.com"
                    />
                  </div>
                  {errors.emailFrom && touched.emailFrom && (
                    <div className="error">{errors.emailFrom}</div>
                  )}
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="senderName" className="text-label">
                  {intl.formatMessage(messages.senderName)}
                </label>
                <div className="form-input">
                  <div className="form-input-field">
                    <Field
                      id="senderName"
                      name="senderName"
                      placeholder="Overseerr"
                      type="text"
                    />
                  </div>
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="smtpHost" className="text-label">
                  {intl.formatMessage(messages.smtpHost)}
                  <span className="label-required">*</span>
                </label>
                <div className="form-input">
                  <div className="form-input-field">
                    <Field
                      id="smtpHost"
                      name="smtpHost"
                      type="text"
                      placeholder="localhost"
                    />
                  </div>
                  {errors.smtpHost && touched.smtpHost && (
                    <div className="error">{errors.smtpHost}</div>
                  )}
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="smtpPort" className="text-label">
                  {intl.formatMessage(messages.smtpPort)}
                  <span className="label-required">*</span>
                </label>
                <div className="form-input">
                  <Field
                    id="smtpPort"
                    name="smtpPort"
                    type="text"
                    placeholder="465"
                    className="short"
                  />
                  {errors.smtpPort && touched.smtpPort && (
                    <div className="error">{errors.smtpPort}</div>
                  )}
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="secure" className="checkbox-label">
                  <span>{intl.formatMessage(messages.enableSsl)}</span>
                  <span className="label-tip">
                    {intl.formatMessage(messages.ssldisabletip)}
                  </span>
                </label>
                <div className="form-input">
                  <Field type="checkbox" id="secure" name="secure" />
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="allowSelfSigned" className="checkbox-label">
                  {intl.formatMessage(messages.allowselfsigned)}
                </label>
                <div className="form-input">
                  <Field
                    type="checkbox"
                    id="allowSelfSigned"
                    name="allowSelfSigned"
                  />
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="authUser" className="text-label">
                  {intl.formatMessage(messages.authUser)}
                </label>
                <div className="form-input">
                  <div className="form-input-field">
                    <Field id="authUser" name="authUser" type="text" />
                  </div>
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="authPass" className="text-label">
                  {intl.formatMessage(messages.authPass)}
                </label>
                <div className="form-input">
                  <div className="form-input-field">
                    <SensitiveInput
                      as="field"
                      id="authPass"
                      name="authPass"
                      type="password"
                      autoComplete="off"
                    />
                  </div>
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="pgpPrivateKey" className="text-label">
                  <span className="mr-2">
                    {intl.formatMessage(messages.pgpPrivateKey)}
                  </span>
                  <Badge badgeType="danger">
                    {intl.formatMessage(globalMessages.advanced)}
                  </Badge>
                  <span className="label-tip">
                    {intl.formatMessage(messages.pgpPrivateKeyTip, {
                      OpenPgpLink: OpenPgpLink,
                    })}
                  </span>
                </label>
                <div className="form-input">
                  <div className="form-input-field">
                    <SensitiveInput
                      as="field"
                      id="pgpPrivateKey"
                      name="pgpPrivateKey"
                      type="textarea"
                      rows="10"
                      className="font-mono text-xs"
                    />
                  </div>
                  {errors.pgpPrivateKey && touched.pgpPrivateKey && (
                    <div className="error">{errors.pgpPrivateKey}</div>
                  )}
                </div>
              </div>
              <div className="form-row">
                <label htmlFor="pgpPassword" className="text-label">
                  <span className="mr-2">
                    {intl.formatMessage(messages.pgpPassword)}
                  </span>
                  <Badge badgeType="danger">
                    {intl.formatMessage(globalMessages.advanced)}
                  </Badge>
                  <span className="label-tip">
                    {intl.formatMessage(messages.pgpPasswordTip, {
                      OpenPgpLink: OpenPgpLink,
                    })}
                  </span>
                </label>
                <div className="form-input">
                  <div className="form-input-field">
                    <SensitiveInput
                      as="field"
                      id="pgpPassword"
                      name="pgpPassword"
                      type="password"
                      autoComplete="off"
                    />
                  </div>
                  {errors.pgpPassword && touched.pgpPassword && (
                    <div className="error">{errors.pgpPassword}</div>
                  )}
                </div>
              </div>
              <NotificationTypeSelector
                currentTypes={values.types}
                onUpdate={(newTypes) => setFieldValue('types', newTypes)}
              />
              <div className="actions">
                <div className="flex justify-end">
                  <span className="inline-flex ml-3 rounded-md shadow-sm">
                    <Button
                      buttonType="warning"
                      disabled={isSubmitting || !isValid || isTesting}
                      onClick={(e) => {
                        e.preventDefault();
                        testSettings();
                      }}
                    >
                      {isTesting
                        ? intl.formatMessage(globalMessages.testing)
                        : intl.formatMessage(globalMessages.test)}
                    </Button>
                  </span>
                  <span className="inline-flex ml-3 rounded-md shadow-sm">
                    <Button
                      buttonType="primary"
                      type="submit"
                      disabled={isSubmitting || !isValid || isTesting}
                    >
                      {isSubmitting
                        ? intl.formatMessage(globalMessages.saving)
                        : intl.formatMessage(globalMessages.save)}
                    </Button>
                  </span>
                </div>
              </div>
            </Form>
          </>
        );
      }}
    </Formik>
  );
};

export default NotificationsEmail;