import { css } from '@emotion/react';
import { theme, spacing, UndoIcon, iconSize } from '@expo/styleguide';
import React from 'react';
import ReactMarkdown from 'react-markdown';

import { InlineCode } from '~/components/base/code';
import { LI, UL } from '~/components/base/list';
import { H2, H3Code, H4, H4Code } from '~/components/plugins/Headings';
import {
  MethodDefinitionData,
  MethodSignatureData,
  PropData,
  TypeSignaturesData,
} from '~/components/plugins/api/APIDataTypes';
import { APISectionDeprecationNote } from '~/components/plugins/api/APISectionDeprecationNote';
import { APISectionPlatformTags } from '~/components/plugins/api/APISectionPlatformTags';
import {
  CommentTextBlock,
  getTagNamesList,
  listParams,
  mdComponents,
  renderParams,
  resolveTypeName,
  STYLES_APIBOX,
  STYLES_APIBOX_NESTED,
  STYLES_NESTED_SECTION_HEADER,
  STYLES_NOT_EXPOSED_HEADER,
} from '~/components/plugins/api/APISectionUtils';

export type APISectionMethodsProps = {
  data: (MethodDefinitionData | PropData)[];
  apiName?: string;
  header?: string;
};

export type RenderMethodOptions = {
  apiName?: string;
  header?: string;
  exposeInSidebar?: boolean;
};

export const renderMethod = (
  method: MethodDefinitionData | PropData,
  { apiName, exposeInSidebar = true }: RenderMethodOptions = {}
): JSX.Element[] => {
  const signatures = method.signatures || (method as PropData)?.type?.declaration?.signatures || [];
  const HeaderComponent = exposeInSidebar ? H3Code : H4Code;
  return signatures.map(
    ({ name, parameters, comment, type }: MethodSignatureData | TypeSignaturesData) => (
      <div
        key={`method-signature-${method.name || name}-${parameters?.length || 0}`}
        css={[STYLES_APIBOX, !exposeInSidebar && STYLES_APIBOX_NESTED]}>
        <APISectionDeprecationNote comment={comment} />
        <APISectionPlatformTags comment={comment} prefix="Only for:" firstElement />
        <HeaderComponent tags={getTagNamesList(comment)}>
          <InlineCode css={!exposeInSidebar ? STYLES_NOT_EXPOSED_HEADER : undefined}>
            {apiName && `${apiName}.`}
            {`${method.name || name}(${parameters ? listParams(parameters) : ''})`}
          </InlineCode>
        </HeaderComponent>
        {parameters && renderParams(parameters)}
        <CommentTextBlock comment={comment} includePlatforms={false} />
        {resolveTypeName(type) !== 'undefined' && (
          <>
            <div css={STYLES_NESTED_SECTION_HEADER}>
              <H4>Returns</H4>
            </div>
            <UL hideBullets>
              <LI>
                <UndoIcon
                  color={theme.icon.secondary}
                  size={iconSize.small}
                  css={returnIconStyles}
                />
                <InlineCode>{resolveTypeName(type)}</InlineCode>
              </LI>
            </UL>
            {comment?.returns && (
              <ReactMarkdown components={mdComponents}>{comment.returns}</ReactMarkdown>
            )}
          </>
        )}
      </div>
    )
  );
};

const APISectionMethods = ({ data, apiName, header = 'Methods' }: APISectionMethodsProps) =>
  data?.length ? (
    <>
      <H2 key="methods-header">{header}</H2>
      {data.map((method: MethodDefinitionData | PropData) =>
        renderMethod(method, { apiName, header })
      )}
    </>
  ) : null;

const returnIconStyles = css({
  transform: 'rotate(180deg)',
  marginRight: spacing[2],
  verticalAlign: 'middle',
});

export default APISectionMethods;