import * as React from 'react';
import { Link } from '@reach/router';
import { Formik, Form, Field, ErrorMessage } from 'formik';
import * as yup from 'yup';
import * as R from 'ramda';

import {
  Box,
  Button,
  Text,
  TextInput,
  Flex,
  InlineNotice,
  Notice,
} from '../alchemy';
import { IdentityPage } from './IdentityPage';
import { TokenConsumer } from '../TokenProvider';
import { IBoxProps } from '../../typings/alchemy';

export interface ISignInFormValues {
  password: string;
  username: string;
}

const validationSchema = yup.object().shape({
  password: yup.string().required('password.required'),
  username: yup
    .string()
    .required('username.required')
    .email('username.invalid'),
});

const TextInputField = (props: any) => {
  const { field, ...otherProps } = props;

  return <TextInput {...field} {...otherProps} />;
};

const FormLabel = (props: any) => {
  return <Text as="label" fontWeight="bold" mb={2} {...props} />;
};
function ErrorNotice(props: { message: string } & IBoxProps) {
  const { message, ...otherProps } = props;

  return (
    <InlineNotice type="danger" {...otherProps}>
      {message}
    </InlineNotice>
  );
}

export function GlobalErrorNotice(
  props: { message: string | null } & IBoxProps,
) {
  const { message, ...otherProps } = props;

  if (R.isNil(message)) {
    return null;
  }

  return <Notice title={props.message} type="danger" {...otherProps} />;
}

export function SignInPage() {
  return (
    <IdentityPage heading="Sign in to your account" title="Sign in to Insight">
      <TokenConsumer>
        {({ signIn, globalErrorMessage }) => {
          return (
            <Formik<ISignInFormValues>
              onSubmit={signIn}
              initialValues={{
                password: '',
                username: '',
              }}
              validateOnBlur={false}
              validateOnChange={false}
              validationSchema={validationSchema}
            >
              {props => {
                const buttonCopy = props.isSubmitting
                  ? 'Signing in...'
                  : 'Sign in';

                return (
                  <>
                    <GlobalErrorNotice
                      data-testid="error-sign-in-global"
                      message={globalErrorMessage}
                      mb={3}
                    />
                    <Box as={Form} data-testid="form-sign-in" width={1}>
                      <Flex flexDirection="column" mb={3}>
                        <FormLabel htmlFor="username" title="Email" mb={2}>
                          Email address
                        </FormLabel>
                        <Field
                          component={TextInputField}
                          data-testid="input-username"
                          name="username"
                          id="username"
                          placeholder="Email address"
                          width={1}
                        />
                        <ErrorMessage name="username">
                          {message => (
                            <ErrorNotice
                              data-testid="error-sign-in-username"
                              message={message}
                              mt={2}
                            />
                          )}
                        </ErrorMessage>
                      </Flex>
                      <Flex flexDirection="column" mb={3}>
                        <FormLabel htmlFor="password" title="Password" mb={2}>
                          Password
                        </FormLabel>
                        <Field
                          component={TextInputField}
                          data-testid="input-password"
                          type="password"
                          name="password"
                          id="password"
                          placeholder="Password"
                          width={1}
                        />
                        <ErrorMessage name="password">
                          {message => (
                            <ErrorNotice
                              data-testid="error-sign-in-password"
                              message={message}
                              mt={2}
                            />
                          )}
                        </ErrorMessage>
                      </Flex>
                      <Button
                        data-testid="button-submit"
                        type="submit"
                        variant="primary"
                        disabled={props.isSubmitting}
                        width={1}
                      >
                        {buttonCopy}
                      </Button>
                    </Box>
                  </>
                );
              }}
            </Formik>
          );
        }}
      </TokenConsumer>
      <Box mt={3}>
        <Link to="/begin_reset_password">Forgot your password?</Link>
      </Box>
    </IdentityPage>
  );
}