'use client';

import React, { createContext, useCallback, useContext, useState } from "react";

type Theme = 'dark' | 'light';

interface ThemeContextType {
  theme: Theme;
  setTheme: (theme: Theme) => void;
}

const ThemeContext = createContext<ThemeContextType | undefined>(undefined);

export const ThemeProvider: React.FC<{ children: React.ReactNode }> = ({ children }) => {
  const [theme, setTheme] = useState<Theme>("dark")

  const changeTheme = useCallback((theme: Theme) => {
    const root = window.document.documentElement
    root.classList.remove("light", "dark")
    root.classList.add(theme)
  }, [])

  const updateTheme = useCallback((theme: Theme) => {
    setTheme(theme)
    changeTheme(theme)
  }, [changeTheme, setTheme])


  return (
    <ThemeContext.Provider value={{ theme, setTheme: updateTheme }}>
      {children}
    </ThemeContext.Provider>
  );
};

export function useTheme() {
  const context = useContext(ThemeContext);
  if (!context) {
    throw new Error('useTheme must be used within a ThemeProvider');
  }
  return context;
}