"use client";

import { createContext, useContext, useState, useEffect, ReactNode } from "react";

type Theme = "light" | "dark";

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

const ThemeContext = createContext<ThemeContextType>({
  theme: "dark",
  toggleTheme: () => {},
});

export function ThemeProvider({ children }: { children: ReactNode }) {
  const [theme, setTheme] = useState<Theme>("dark");
  const [mounted, setMounted] = useState(false);

  useEffect(() => {
    setMounted(true);
    const savedTheme = localStorage.getItem("theme") as Theme;
    const initialTheme = savedTheme || "dark";
    setTheme(initialTheme);
    document.documentElement.setAttribute("data-theme", initialTheme);
  }, []);

  const toggleTheme = () => {
    const newTheme = theme === "dark" ? "light" : "dark";
    setTheme(newTheme);
    if (typeof window !== "undefined") {
      localStorage.setItem("theme", newTheme);
      document.documentElement.setAttribute("data-theme", newTheme);
    }
  };

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

export function useTheme() {
  return useContext(ThemeContext);
}