import React, { FC, useEffect, useState } from 'react';
import classNames from 'classnames';
import { Input, Form, InputNumber, Button } from 'antd';
import { FieldUpdaterFunc } from '../../types/config-section';
import { StatusState } from '../../utils/input-statuses';
import { FormStatusIndicator } from './FormStatusIndicator';
import { PASSWORD_COMPLEXITY_RULES, REGEX_PASSWORD } from '../../utils/config-constants';

export const TEXTFIELD_TYPE_TEXT = 'default';
export const TEXTFIELD_TYPE_PASSWORD = 'password'; // Input.Password
export const TEXTFIELD_TYPE_NUMBER = 'numeric'; // InputNumber
export const TEXTFIELD_TYPE_TEXTAREA = 'textarea'; // Input.TextArea
export const TEXTFIELD_TYPE_URL = 'url';

export type TextFieldProps = {
  fieldName: string;

  onSubmit?: () => void;
  onPressEnter?: () => void;
  onHandleSubmit?: () => void;
  className?: string;
  disabled?: boolean;
  label?: string;
  maxLength?: number;
  pattern?: string;
  placeholder?: string;
  required?: boolean;
  status?: StatusState;
  tip?: string;
  type?: string;
  useTrim?: boolean;
  useTrimLead?: boolean;
  value?: string | number;
  hasComplexityRequirements?: boolean;
  onBlur?: FieldUpdaterFunc;
  onChange?: FieldUpdaterFunc;
};

export const TextField: FC<TextFieldProps> = ({
  className,
  disabled,
  fieldName,
  label,
  maxLength,
  onBlur,
  onChange,
  onPressEnter,
  onHandleSubmit,
  pattern,
  placeholder,
  required,
  status,
  tip,
  type,
  useTrim,
  value,
  hasComplexityRequirements,
}) => {
  const [hasPwdChanged, setHasPwdChanged] = useState(false);
  const [showPwdButton, setShowPwdButton] = useState(false);
  const [form] = Form.useForm();
  const handleChange = (e: any) => {
    // if an extra onChange handler was sent in as a prop, let's run that too.
    if (onChange) {
      const val = type === TEXTFIELD_TYPE_NUMBER ? e : e.target.value;
      setShowPwdButton(true);
      if (hasComplexityRequirements && REGEX_PASSWORD.test(val)) {
        setHasPwdChanged(true);
      } else {
        setHasPwdChanged(false);
      }

      onChange({ fieldName, value: useTrim ? val.trim() : val });
    }
  };

  useEffect(() => {
    form.setFieldsValue({ inputFieldPassword: value });
  }, [value]);

  // if you blur a required field with an empty value, restore its original value in state (parent's state), if an onChange from parent is available.
  const handleBlur = (e: any) => {
    const val = e.target.value;
    if (onBlur) {
      onBlur({ value: val });
    }
  };

  const handlePressEnter = () => {
    if (onPressEnter) {
      onPressEnter();
    }
  };
  // Password Complexity rules
  const passwordComplexityRules = [];
  // display the appropriate Ant text field
  let Field = Input as
    | typeof Input
    | typeof InputNumber
    | typeof Input.TextArea
    | typeof Input.Password;
  let fieldProps = {};
  if (type === TEXTFIELD_TYPE_TEXTAREA) {
    Field = Input.TextArea;
    fieldProps = {
      autoSize: true,
    };
  } else if (type === TEXTFIELD_TYPE_PASSWORD) {
    PASSWORD_COMPLEXITY_RULES.forEach(element => {
      passwordComplexityRules.push(element);
    });
    Field = Input.Password;
    fieldProps = {
      visibilityToggle: true,
    };
  } else if (type === TEXTFIELD_TYPE_NUMBER) {
    Field = InputNumber;
    fieldProps = {
      type: 'number',
      min: 1,
      max: 10 ** maxLength - 1,
    };
  } else if (type === TEXTFIELD_TYPE_URL) {
    fieldProps = {
      type: 'url',
      pattern,
    };
  }

  const fieldId = `field-${fieldName}`;

  const { type: statusType } = status || {};

  const containerClass = classNames({
    'formfield-container': true,
    'textfield-container': true,
    [`type-${type}`]: true,
    required,
    [`status-${statusType}`]: status,
  });

  return (
    <div className={containerClass}>
      {label ? (
        <div className="label-side">
          <label htmlFor={fieldId} className="formfield-label">
            {label}
          </label>
        </div>
      ) : null}

      {!hasComplexityRequirements ? (
        <div className="input-side">
          <div className="input-group">
            <Field
              id={fieldId}
              className={`field ${className} ${fieldId}`}
              {...fieldProps}
              {...(type !== TEXTFIELD_TYPE_NUMBER && { allowClear: true })}
              placeholder={placeholder}
              maxLength={maxLength}
              onChange={handleChange}
              onBlur={handleBlur}
              onPressEnter={handlePressEnter}
              disabled={disabled}
              value={value as number | (readonly string[] & number)}
            />
          </div>
          <FormStatusIndicator status={status} />
          <p className="field-tip">{tip}</p>
        </div>
      ) : (
        <div className="input-side">
          <div className="input-group">
            <Form
              name="basic"
              form={form}
              initialValues={{ inputFieldPassword: value }}
              style={{ width: '100%' }}
            >
              <Form.Item name="inputFieldPassword" rules={passwordComplexityRules}>
                <Input.Password
                  id={fieldId}
                  className={`field ${className} ${fieldId}`}
                  onChange={handleChange}
                  onBlur={handleBlur}
                  placeholder={placeholder}
                  onPressEnter={handlePressEnter}
                  disabled={disabled}
                  value={value as number | (readonly string[] & number)}
                />
              </Form.Item>
              {showPwdButton && (
                <div style={{ display: 'flex', flexDirection: 'row-reverse' }}>
                  <Button
                    type="primary"
                    size="small"
                    className="submit-button"
                    onClick={onHandleSubmit}
                    disabled={!hasPwdChanged}
                  >
                    Update
                  </Button>
                </div>
              )}
              <FormStatusIndicator status={status} />
              <p className="field-tip">{tip}</p>
            </Form>
          </div>
        </div>
      )}
    </div>
  );
};

TextField.defaultProps = {
  className: '',
  disabled: false,
  label: '',
  maxLength: 255,

  placeholder: '',
  required: false,
  status: null,
  tip: '',
  type: TEXTFIELD_TYPE_TEXT,
  value: '',

  pattern: '',
  useTrim: false,
  useTrimLead: false,
  hasComplexityRequirements: false,

  onSubmit: () => {},
  onBlur: () => {},
  onChange: () => {},
  onPressEnter: () => {},
  onHandleSubmit: () => {},
};