import React, { useState, FC, useRef } from 'react';
interface InputTagProps {
  value: string;
  onChange: (value: string) => void;
}
const InputTag: FC<InputTagProps> = ({ value, onChange }) => {
  const myRef = useRef<HTMLDivElement>(null);
  const [isEditing, setIsEditing] = useState(false);
  interface ParsedText {
    type: string;
    content: string;
  }
  const parseText = (input: string): ParsedText[] => {
    // 使用新的正則表達式來分割文本，保留空格
    const parts = input.split(/((?<=\s)|(?=\s)|(?=#))/g).filter(Boolean);
    return parts.reduce<ParsedText[]>((acc, part) => {
      if (part.trim() === '') {
        // 保留空格
        acc.push({ type: 'space', content: part });
      } else if (part.startsWith('#')) {
        // 修改標簽的正則表達式，允許單個#
        if (/^#[\w\u4e00-\u9fa5]*$/.test(part)) {
          acc.push({ type: 'tags', content: part });
        } else {
          // 如果不是有效的標簽，作為普通文本處理
          acc.push({ type: 'text', content: part });
        }
      } else {
        acc.push({ type: 'text', content: part });
      }
      return acc;
    }, []);
  };
  const handleClick = () => {
    setIsEditing(true);
    if (myRef.current) {
      myRef.current.innerText = ''; // 清空輸入框內容
    }
  };
  const handleBlur = () => {
    setIsEditing(false);
    if (myRef.current) {
      const innerText = myRef.current.innerText;
      onChange(innerText); // 更新外部值
      myRef.current.innerHTML = ''; // 清空現(xiàn)有內容
      // 根據(jù)解析的文本動態(tài)創(chuàng)建子元素
      parseText(innerText).forEach((item) => {
        const span = document.createElement('span');
        span.innerText = item.content;
        span.style.color = item.type === 'tags' ? 'green' : 'black'; 
        myRef.current.appendChild(span);
      });
    }
  };
  const handleInput = (event: React.FormEvent<HTMLDivElement>) => {
    console.log("chu")
    if (myRef.current) {
      const innerText = myRef.current.innerText;
      // 清空內容以便重新填充
      myRef.current.innerHTML = '';
      // 根據(jù)解析的文本動態(tài)創(chuàng)建子元素
      parseText(innerText).forEach((item) => {
        const span = document.createElement('span');
        span.innerText = item.content;
        span.style.color = item.type === 'tags' ? 'green' : 'black'; 
        myRef.current.appendChild(span);
      });
      // 保持光標在最后
      const range = document.createRange();
      const selection = window.getSelection();
      range.selectNodeContents(myRef.current);
      range.collapse(false); // 將光標放在最后
      selection?.removeAllRanges();
      selection?.addRange(range);
    }
  };
  return (
    <div
      ref={myRef}
      style={{
        border: '1px solid #ccc',
        borderRadius: '4px',
        padding: '8px',
        width: '100%',
        cursor: isEditing ? 'text' : 'pointer',
      }}
      onClick={handleClick}
      onInput={handleInput} 
      onBlur={handleBlur}
      contentEditable="true"
      data-placeholder="請輸入內容"
      data-node="true"
    >
    </div>
  );
};
export default InputTag;