82 lines
2.0 KiB
TypeScript
82 lines
2.0 KiB
TypeScript
'use client';
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import React, { createContext, useContext, useEffect, useState } from 'react';
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type Theme = 'blue' | 'violet';
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interface ThemeContextType {
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theme: Theme;
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setTheme: (theme: Theme) => void;
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}
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const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
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export const useTheme = () => {
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const context = useContext(ThemeContext);
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if (context === undefined) {
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throw new Error('useTheme must be used within a ThemeProvider');
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}
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return context;
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};
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interface ThemeProviderProps {
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children: React.ReactNode;
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}
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export const ThemeProvider: React.FC<ThemeProviderProps> = ({ children }) => {
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const [theme, setTheme] = useState<Theme>('blue');
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const [mounted, setMounted] = useState(false);
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// Load theme settings from localStorage on component mount
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useEffect(() => {
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setMounted(true);
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const savedTheme = localStorage.getItem('theme') as Theme | null;
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if (savedTheme && (savedTheme === 'blue' || savedTheme === 'violet')) {
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setTheme(savedTheme);
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}
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}, []);
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// Apply theme changes
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useEffect(() => {
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if (!mounted) return;
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const root = document.documentElement;
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// Remove existing theme classes
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root.classList.remove('theme-blue', 'theme-violet', 'dark');
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// Add new theme class
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root.classList.add(`theme-${theme}`);
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// Always follow system preference for dark mode
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const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
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const applySystemTheme = () => {
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root.classList.toggle('dark', mediaQuery.matches);
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};
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applySystemTheme();
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mediaQuery.addEventListener('change', applySystemTheme);
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// Save theme to localStorage
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localStorage.setItem('theme', theme);
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// Cleanup listener
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return () => mediaQuery.removeEventListener('change', applySystemTheme);
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}, [theme, mounted]);
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return (
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<ThemeContext.Provider
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value={{
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theme,
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setTheme,
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}}
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>
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<div className={`theme-${theme}`}>
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{children}
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</div>
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</ThemeContext.Provider>
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);
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};
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