src/hooks/useLocalStorage.ts

import { useState, useEffect } from 'react';

/**

 * 自定义钩子，用于在localStorage中持久化状态

 * @param key localStorage的键名

 * @param initialValue 初始值

 * @returns [存储的值, 设置值的函数, 移除值的函数]

 */
function useLocalStorage<T>(
  key: string,
  initialValue: T
): [T, (value: T | ((val: T) => T)) => void, () => void] {
  // 获取localStorage中的初始值
  const readValue = (): T => {
    // 防止服务器端渲染时出错
    if (typeof window === 'undefined') {
      return initialValue;
    }

    try {
      const item = window.localStorage.getItem(key);
      return item ? JSON.parse(item) : initialValue;
    } catch (error) {
      console.warn(`Error reading localStorage key "${key}":`, error);
      return initialValue;
    }
  };

  // 状态保存当前值
  const [storedValue, setStoredValue] = useState<T>(readValue);

  // 返回用于更新状态的函数
  const setValue = (value: T | ((val: T) => T)) => {
    try {
      // 允许函数形式的更新
      const valueToStore =
        value instanceof Function ? value(storedValue) : value;
      
      // 保存到状态
      setStoredValue(valueToStore);
      
      // 保存到localStorage
      if (typeof window !== 'undefined') {
        window.localStorage.setItem(key, JSON.stringify(valueToStore));
      }
    } catch (error) {
      console.warn(`Error setting localStorage key "${key}":`, error);
    }
  };

  // 移除localStorage中的值
  const removeValue = () => {
    try {
      // 从localStorage中移除
      if (typeof window !== 'undefined') {
        window.localStorage.removeItem(key);
      }
      
      // 重置状态为初始值
      setStoredValue(initialValue);
    } catch (error) {
      console.warn(`Error removing localStorage key "${key}":`, error);
    }
  };

  // 监听其他标签页中的存储变化
  useEffect(() => {
    const handleStorageChange = (e: StorageEvent) => {
      if (e.key === key && e.newValue !== null) {
        try {
          setStoredValue(JSON.parse(e.newValue));
        } catch (error) {
          console.warn(`Error parsing localStorage value on change:`, error);
        }
      } else if (e.key === key && e.newValue === null) {
        setStoredValue(initialValue);
      }
    };

    // 添加事件监听器
    window.addEventListener('storage', handleStorageChange);

    // 清理事件监听器
    return () => {
      window.removeEventListener('storage', handleStorageChange);
    };
  }, [key, initialValue]);

  return [storedValue, setValue, removeValue];
}

export default useLocalStorage;