/**
 * Bytedesk客服Widget组件
 * 用于vf_react项目集成
 *
 * 使用方法:
 *   import BytedeskWidget from './components/BytedeskWidget';
 *   import { getBytedeskConfig } from './config/bytedesk.config';
 *
 *   <BytedeskWidget
 *     config={getBytedeskConfig()}
 *     autoLoad={true}
 *   />
 */

import { useEffect, useRef } from 'react';
import PropTypes from 'prop-types';

const BytedeskWidget = ({
  config,
  autoLoad = true,
  onLoad,
  onError
}) => {
  const scriptRef = useRef(null);
  const widgetRef = useRef(null);

  useEffect(() => {
    // 如果不自动加载或配置未设置，跳过
    if (!autoLoad || !config) {
      if (!config) {
        console.warn('[Bytedesk] 配置未设置，客服组件未加载');
      }
      return;
    }

    console.log('[Bytedesk] 开始加载客服Widget...', config);

    // 加载Bytedesk Widget脚本
    const script = document.createElement('script');
    script.src = 'https://www.weiyuai.cn/embed/bytedesk-web.js';
    script.async = true;
    script.id = 'bytedesk-web-script';

    script.onload = () => {
      console.log('[Bytedesk] Widget脚本加载成功');

      try {
        if (window.BytedeskWeb) {
          console.log('[Bytedesk] 初始化Widget');
          const bytedesk = new window.BytedeskWeb(config);
          bytedesk.init();

          widgetRef.current = bytedesk;
          console.log('[Bytedesk] Widget初始化成功');

          if (onLoad) {
            onLoad(bytedesk);
          }
        } else {
          throw new Error('BytedeskWeb对象未定义');
        }
      } catch (error) {
        console.error('[Bytedesk] Widget初始化失败:', error);
        if (onError) {
          onError(error);
        }
      }
    };

    script.onerror = (error) => {
      console.error('[Bytedesk] Widget脚本加载失败:', error);
      if (onError) {
        onError(error);
      }
    };

    // 添加脚本到页面
    document.body.appendChild(script);
    scriptRef.current = script;

    // 清理函数
    return () => {
      console.log('[Bytedesk] 清理Widget');

      try {
        // 调用Widget的destroy方法（如果存在）
        if (widgetRef.current && typeof widgetRef.current.destroy === 'function') {
          console.log('[Bytedesk] 调用Widget.destroy()');
          widgetRef.current.destroy();
        }
      } catch (error) {
        console.warn('[Bytedesk] Widget.destroy()失败:', error.message);
      }

      try {
        // 移除脚本
        if (scriptRef.current) {
          if (document.body.contains(scriptRef.current)) {
            document.body.removeChild(scriptRef.current);
          }
          scriptRef.current = null;
        }
      } catch (error) {
        console.warn('[Bytedesk] 移除脚本失败:', error.message);
      }

      try {
        // 移除Widget DOM元素（使用更安全的remove()方法）
        const widgetElements = document.querySelectorAll('[class*="bytedesk"], [id*="bytedesk"]');
        widgetElements.forEach(el => {
          try {
            if (el && el.parentNode) {
              // 优先使用remove()方法（更现代、更安全）
              if (typeof el.remove === 'function') {
                el.remove();
              } else {
                el.parentNode.removeChild(el);
              }
            }
          } catch (removeError) {
            console.warn('[Bytedesk] 移除DOM元素失败:', el, removeError.message);
          }
        });
      } catch (error) {
        console.warn('[Bytedesk] 清理DOM元素失败:', error.message);
      }

      try {
        // 清理全局对象
        if (window.BytedeskWeb) {
          delete window.BytedeskWeb;
        }
      } catch (error) {
        console.warn('[Bytedesk] 清理全局对象失败:', error.message);
      }

      console.log('[Bytedesk] Widget清理完成');
    };
  }, [config, autoLoad, onLoad, onError]);

  // 不渲染任何元素（Widget会自动插入DOM到body）
  // 返回null避免React DOM管理冲突
  return null;
};

BytedeskWidget.propTypes = {
  config: PropTypes.shape({
    apiUrl: PropTypes.string.isRequired,
    htmlUrl: PropTypes.string.isRequired,
    placement: PropTypes.oneOf(['bottom-right', 'bottom-left', 'top-right', 'top-left']),
    marginBottom: PropTypes.number,
    marginSide: PropTypes.number,
    autoPopup: PropTypes.bool,
    locale: PropTypes.string,
    bubbleConfig: PropTypes.shape({
      show: PropTypes.bool,
      icon: PropTypes.string,
      title: PropTypes.string,
      subtitle: PropTypes.string,
    }),
    theme: PropTypes.shape({
      mode: PropTypes.oneOf(['light', 'dark', 'system']),
      backgroundColor: PropTypes.string,
      textColor: PropTypes.string,
    }),
    chatConfig: PropTypes.shape({
      org: PropTypes.string.isRequired,
      t: PropTypes.string.isRequired,
      sid: PropTypes.string.isRequired,
    }).isRequired,
  }),
  autoLoad: PropTypes.bool,
  onLoad: PropTypes.func,
  onError: PropTypes.func,
};

export default BytedeskWidget;