OpenClaw-bot-review/lib/theme.tsx

"use client";

import { createContext, useContext, useState, useCallback, useEffect, ReactNode } from "react";
import { useI18n } from "@/lib/i18n";

export type Theme = "dark" | "light";

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

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

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

  useEffect(() => {
    const saved = localStorage.getItem("theme") as Theme;
    if (saved === "light" || saved === "dark") {
      setThemeState(saved);
      document.documentElement.setAttribute("data-theme", saved);
    }
  }, []);

  const setTheme = useCallback((t: Theme) => {
    setThemeState(t);
    document.documentElement.setAttribute("data-theme", t);
    localStorage.setItem("theme", t);
  }, []);

  const toggleTheme = useCallback(() => {
    setTheme(theme === "dark" ? "light" : "dark");
  }, [theme, setTheme]);

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

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

export function ThemeSwitcher() {
  const { theme, toggleTheme } = useTheme();
  const { t } = useI18n();
  return (
    <button
      onClick={toggleTheme}
      className="px-2 py-1.5 rounded-lg bg-[var(--bg)] border border-[var(--border)] text-sm hover:border-[var(--accent)] transition cursor-pointer"
      title={theme === "dark" ? t("theme.switchToLight") : t("theme.switchToDark")}
    >
      {theme === "dark" ? "☀️" : "🌙"}
    </button>
  );
}