import * as React from 'react';
import classNames from 'classnames';
import { ConfigContext } from '../config-provider';

function getAction(actions: React.ReactNode[]) {
  if (!actions || !actions.length) {
    return null;
  }
  // eslint-disable-next-line react/no-array-index-key
  const actionList = actions.map((action, index) => <li key={`action-${index}`}>{action}</li>);
  return actionList;
}

export interface CommentProps {
  /** List of action items rendered below the comment content */
  actions?: Array<React.ReactNode>;
  /** The element to display as the comment author. */
  author?: React.ReactNode;
  /** The element to display as the comment avatar - generally an antd Avatar */
  avatar?: React.ReactNode;
  /** className of comment */
  className?: string;
  /** The main content of the comment */
  content: React.ReactNode;
  /** Nested comments should be provided as children of the Comment */
  children?: React.ReactNode;
  /** Comment prefix defaults to '.ant-comment' */
  prefixCls?: string;
  /** Additional style for the comment */
  style?: React.CSSProperties;
  /** A datetime element containing the time to be displayed */
  datetime?: React.ReactNode;
}

const Comment: React.FC<CommentProps> = ({
  actions,
  author,
  avatar,
  children,
  className,
  content,
  prefixCls: customizePrefixCls,
  style,
  datetime,
  ...otherProps
}) => {
  const { getPrefixCls, direction } = React.useContext(ConfigContext);

  const renderNested = (prefixCls: string, nestedChildren: any) => {
    return <div className={classNames(`${prefixCls}-nested`)}>{nestedChildren}</div>;
  };

  const prefixCls = getPrefixCls('comment', customizePrefixCls);

  const avatarDom = (
    <div className={`${prefixCls}-avatar`}>
      {typeof avatar === 'string' ? <img src={avatar} alt="comment-avatar" /> : avatar}
    </div>
  );

  const actionDom =
    actions && actions.length ? (
      <ul className={`${prefixCls}-actions`}>{getAction(actions)}</ul>
    ) : null;

  const authorContent = (
    <div className={`${prefixCls}-content-author`}>
      {author && <span className={`${prefixCls}-content-author-name`}>{author}</span>}
      {datetime && <span className={`${prefixCls}-content-author-time`}>{datetime}</span>}
    </div>
  );

  const contentDom = (
    <div className={`${prefixCls}-content`}>
      {authorContent}
      <div className={`${prefixCls}-content-detail`}>{content}</div>
      {actionDom}
    </div>
  );

  const comment = (
    <div className={`${prefixCls}-inner`}>
      {avatarDom}
      {contentDom}
    </div>
  );

  const cls = classNames(prefixCls, className, {
    [`${prefixCls}-rtl`]: direction === 'rtl',
  });
  return (
    <div {...otherProps} className={cls} style={style}>
      {comment}
      {children ? renderNested(prefixCls, children) : null}
    </div>
  );
};

export default Comment;