import { useState } from 'react';

/** React hook for localStorage
 * From https://usehooks.com/useLocalStorage/
 */
export default function useLocalStorage<T>(key: string, initialValue: T): [T, (x: T) => void] {
    // State to store our value
    // Pass initial state function to useState so logic is only executed once
    const [storedValue, setStoredValue] = useState(() => {
        try {
            // Get from local storage by key
            const item = window.localStorage.getItem(key);
            // Parse stored json or if none return initialValue
            try {
                return item ? JSON.parse(item) : initialValue;
            } catch (err) {
                return item ?? initialValue;
            }
        } catch (error) {
            // If error also return initialValue
            console.error(error);
            return initialValue;
        }
    });

    // Return a wrapped version of useState's setter function that ...
    // ... persists the new value to localStorage.
    const setValue = (value: T): void => {
        try {
            // Allow value to be a function, so we have same API as useState
            const valueToStore = value instanceof Function ? value(storedValue) : value;
            // Save state
            setStoredValue(valueToStore);
            // Save to local storage
            window.localStorage.setItem(key, JSON.stringify(valueToStore));
        } catch (error) {
            // A more advanced implementation would handle the error case
            console.error(error);
        }
    };

    return [storedValue, setValue];
}
