@gv-sh/specgen-user/src/components/theme/theme-provider.jsx

[](https://github.com/gv-sh/specgen-user)

// src/components/theme/theme-provider.jsx
import React, { createContext, useContext, useEffect, useState } from "react";

const ThemeContext = createContext({
  theme: "light",
  setTheme: () => null,
});

export const ThemeProvider = ({ children, defaultTheme = "light", storageKey = "ui-theme" }) => {
  const [theme, setTheme] = useState(() => {
    // Check for stored theme preference
    const storedTheme = localStorage.getItem(storageKey);
    if (storedTheme) return storedTheme;
    
    // Check for system preference
    if (typeof window !== "undefined") {
      if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
        return "dark";
      }
    }
    
    return defaultTheme;
  });

  useEffect(() => {
    const root = window.document.documentElement;
    root.classList.remove("light", "dark");
    root.classList.add(theme);
    localStorage.setItem(storageKey, theme);
  }, [theme, storageKey]);

  const value = {
    theme,
    setTheme: (newTheme) => {
      setTheme(newTheme);
    },
  };

  return <ThemeContext.Provider value={value}>{children}</ThemeContext.Provider>;
};

export const useTheme = () => {
  const context = useContext(ThemeContext);
  if (context === undefined) {
    throw new Error("useTheme must be used within a ThemeProvider");
  }
  return context;
};