import React from 'react'
import { withRouter, Link } from 'react-router-dom'
import { graphql, compose } from 'react-apollo'
import { withFormik } from 'formik'
import Yup from 'yup'

import FormWideError from '../elements/form/FormWideError'
import TextInput from '../elements/form/TextInput'
import Button from '../elements/form/Button'
import { H2 } from '../elements/text/Headings'
import Wrapper from '../elements/layout/Wrapper'

import CurrentUser from '../queries/CurrentUser'
import signinUser from '../mutations/signinUser'

const handleSubmit = (payload, { props, setSubmitting, setErrors }) => {
  const {email, password} = payload
  props.signinUser({ variables: { email, password } })
    .then((response) => {
      window.localStorage.setItem('graphcoolToken', response.data.signinUser.token)
      props.data.refetch()
      props.history.push('/')
    }, (e) => {
      const errors = e.graphQLErrors.map(error => error.message)
      console.log(errors)
      setSubmitting(false)
      setErrors({ email: ' ', password: ' ', form: errors })
    })
}

const LoginForm = ({
  handleSubmit,
  errors,
  touched,
  values,
  handleChange,
  handleBlur,
  isSubmitting
}) =>
  <Wrapper>
    <H2>Sign In</H2>
    <FormWideError error={errors.form} />
    <form onSubmit={handleSubmit}>
      <TextInput
        id='email'
        type='email'
        label='Email'
        placeholder='you@yourdomain.com'
        error={errors.email && touched.email && errors.email}
        value={values.email}
        onChange={handleChange}
        onBlur={handleBlur}
      />
      <TextInput
        id='password'
        type='password'
        label='Password'
        placeholder=''
        error={errors.password && touched.password && errors.password}
        value={values.password}
        onChange={handleChange}
        onBlur={handleBlur}
      />
      <Button
        primary
        type='submit'
        disabled={
          isSubmitting ||
          !!(errors.email && touched.email) ||
          !!(errors.password && touched.password)
        }
      >
        Sign In
      </Button>
    </form>
  </Wrapper>

const LoginFormWithGraphQL = compose(
  graphql(signinUser, {name: 'signinUser'}),
  graphql(CurrentUser, { options: { fetchPolicy: 'network-only' } }),
  withFormik({
    validationSchema: Yup.object().shape({
      email: Yup.string()
        .email('Invalid email address')
        .required('Email is required'),
      password: Yup.string()
        .required('Password is required')
    }),
    mapPropsToValues: ({ variables }) => ({
      ...variables
    }),
    handleSubmit: handleSubmit,
    displayName: 'Login'
  })
)(LoginForm)

const LoginFormWithRouter = withRouter(LoginFormWithGraphQL)

class Login extends React.Component {
  componentWillUpdate (nextProps) {
    if (!this.props.data.user && nextProps.data.user) {
      this.props.history.push('/dashboard')
    }
  }

  render () {
    if (this.props.data.loading) {
      return (<div></div>)
    }

    return (
      <div>
        <LoginFormWithRouter variables={{ email: '', password: '' }} />
        <p>Need an account? <Link to="/signup">Create one now</Link></p>
      </div>
    )
  }

}

// Set network fetch policy to network only for security reasons
export default graphql(CurrentUser, { options: { fetchPolicy: 'network-only' } })(withRouter(Login))