import React from 'react';
import { Form, Icon, Input, Button } from 'antd';

const FormItem = Form.Item;

function hasErrors(fieldsError) {
  return Object.keys(fieldsError).some(field => fieldsError[field]);
}

class HorizontalLoginForm extends React.Component {
  componentDidMount() {
    // To disabled submit button at the beginning.
    this.props.form.validateFields();
  }

  handleSubmit = (e) => {
    e.preventDefault();
    this.props.form.validateFields((err, values) => {
      if (!err) {
        console.log('Received values of form: ', values);
      }
    });
  };

  render() {
    const {
      getFieldDecorator,
      getFieldsError,
      getFieldError,
      isFieldTouched,
    } = this.props.form;

    // Only show error after a field is touched.
    const userNameError =
      isFieldTouched('userName') && getFieldError('userName');
    const passwordError =
      isFieldTouched('password') && getFieldError('password');
    return (
      <Form layout="inline" onSubmit={this.handleSubmit}>
        <FormItem
          validateStatus={userNameError ? 'error' : ''}
          help={userNameError || ''}
        >
          {getFieldDecorator('userName', {
            rules: [{ required: true, message: 'Please input your username!' }],
          })(
            <Input
              prefix={<Icon type="user" style={{ color: 'rgba(0,0,0,.25)' }} />}
              placeholder="Username"
            />
          )}
        </FormItem>
        <FormItem
          validateStatus={passwordError ? 'error' : ''}
          help={passwordError || ''}
        >
          {getFieldDecorator('password', {
            rules: [{ required: true, message: 'Please input your Password!' }],
          })(
            <Input
              prefix={<Icon type="lock" style={{ color: 'rgba(0,0,0,.25)' }} />}
              type="password"
              placeholder="Password"
            />
          )}
        </FormItem>
        <FormItem>
          <Button
            type="primary"
            htmlType="submit"
            disabled={hasErrors(getFieldsError())}
          >
            Log in
          </Button>
        </FormItem>
      </Form>
    );
  }
}

const WrappedHorizontalLoginForm = Form.create()(HorizontalLoginForm);

export default WrappedHorizontalLoginForm;