/*
 * Copyright (c) 2020 - present Cloudogu GmbH
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see https://www.gnu.org/licenses/.
 */

import React, { ChangeEvent, FC, FocusEvent, useEffect } from "react";
import { createAttributesForTesting, Help } from "../index";
import LabelWithHelpIcon from "./LabelWithHelpIcon";
import useInnerRef from "./useInnerRef";
import { createFormFieldWrapper, FieldProps, FieldType, isLegacy, isUsingRef } from "./FormFieldTypes";
import classNames from "classnames";
import { createA11yId } from "../createA11yId";
import styled from "styled-components";

const StyledInput = styled.input`
  height: 1rem;
  width: 1rem;
`;

const StyledLabel = styled.label`
  margin-left: -0.75rem;
  display: inline-flex;
`;

export interface CheckboxElement extends HTMLElement {
  value: boolean;
}

type BaseProps = {
  label?: string;
  checked?: boolean;
  indeterminate?: boolean;
  name?: string;
  title?: string;
  disabled?: boolean;
  helpText?: string;
  testId?: string;
  className?: string;
  readOnly?: boolean;
};

const InnerCheckbox: FC<FieldProps<BaseProps, HTMLInputElement, boolean>> = ({
  label,
  name,
  indeterminate,
  disabled,
  testId,
  className,
  readOnly,
  ...props
}) => {
  const field = useInnerRef(props.innerRef);

  useEffect(() => {
    if (field.current) {
      field.current.indeterminate = indeterminate || false;
    }
  }, [field, indeterminate]);

  const handleChange = (event: ChangeEvent<HTMLInputElement>) => {
    if (props.onChange) {
      if (isUsingRef<BaseProps, HTMLInputElement, boolean>(props)) {
        props.onChange(event);
      } else if (isLegacy(props)) {
        props.onChange(event.target.checked, name);
      }
    }
  };

  const handleBlur = (event: FocusEvent<HTMLInputElement>) => {
    if (props.onBlur) {
      if (isUsingRef<BaseProps, HTMLInputElement, boolean>(props)) {
        props.onBlur(event);
      } else if (isLegacy(props)) {
        props.onBlur(event.target.checked, name);
      }
    }
  };

  const id = createA11yId("checkbox");
  const helpId = createA11yId("checkbox");

  const renderHelp = () => {
    const { title, helpText } = props;
    if (helpText && !title) {
      return <Help message={helpText} id={helpId} />;
    }
  };

  const renderLabelWithHelp = () => {
    const { title, helpText } = props;
    if (title) {
      return <LabelWithHelpIcon label={title} helpText={helpText} id={id} helpId={helpId} />;
    }
  };
  return (
    <fieldset className="field" disabled={readOnly}>
      {renderLabelWithHelp()}
      <div className="control">
        {/*
            we have to ignore the next line,
            because jsx label does not the custom disabled attribute
            but bulma does.
            // @ts-ignore */}
        <StyledLabel className="checkbox is-align-items-center" disabled={disabled}>
          <StyledInput
            type="checkbox"
            name={name}
            className={classNames("m-3", className)}
            onChange={handleChange}
            onBlur={handleBlur}
            ref={field}
            checked={props.checked}
            disabled={disabled}
            readOnly={readOnly}
            aria-labelledby={id}
            aria-describedby={helpId}
            {...createAttributesForTesting(testId)}
          />{" "}
          {label}
          {renderHelp()}
        </StyledLabel>
      </div>
    </fieldset>
  );
};

/**
 * @deprecated
 */
const Checkbox: FieldType<BaseProps, HTMLInputElement, boolean> = createFormFieldWrapper(InnerCheckbox);

export default Checkbox;