refactor(theme):valid localstroage and organized theme codes

src/contexts/ThemeContext.tsx

@@ -1,63 +1,4 @@
-import React, { createContext, useContext, useEffect, useState } from 'react';
+import { ThemeContextType } from "@/types/theme.interface";
+import { createContext } from "react";
 
-type ThemeMode = 'light' | 'dark';
-type AccentTheme = 'blue' | 'purple' | 'green';
-
-interface ThemeContextType {
-  mode: ThemeMode;
-  accent: AccentTheme;
-  setMode: (mode: ThemeMode) => void;
-  setAccent: (accent: AccentTheme) => void;
-  toggleMode: () => void;
-}
-
-const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
-
-export function ThemeProvider({ children }: { children: React.ReactNode }) {
-  const [mode, setModeState] = useState<ThemeMode>('dark');
-  const [accent, setAccentState] = useState<AccentTheme>('blue');
-
-  // Initialize theme from localStorage
-  useEffect(() => {
-    const savedMode = localStorage.getItem('techzaa-mode') as ThemeMode;
-    const savedAccent = localStorage.getItem('techzaa-accent') as AccentTheme;
-    
-    if (savedMode) setModeState(savedMode);
-    if (savedAccent) setAccentState(savedAccent);
-  }, []);
-
-  // Apply theme classes to document
-  useEffect(() => {
-    const root = document.documentElement;
-    
-    // Apply dark/light mode
-    root.classList.remove('light', 'dark');
-    root.classList.add(mode);
-    
-    // Apply accent theme
-    root.classList.remove('theme-blue', 'theme-purple', 'theme-green');
-    root.classList.add(`theme-${accent}`);
-    
-    // Save to localStorage
-    localStorage.setItem('techzaa-mode', mode);
-    localStorage.setItem('techzaa-accent', accent);
-  }, [mode, accent]);
-
-  const setMode = (newMode: ThemeMode) => setModeState(newMode);
-  const setAccent = (newAccent: AccentTheme) => setAccentState(newAccent);
-  const toggleMode = () => setModeState(prev => prev === 'dark' ? 'light' : 'dark');
-
-  return (
-    <ThemeContext.Provider value={{ mode, accent, setMode, setAccent, toggleMode }}>
-      {children}
-    </ThemeContext.Provider>
-  );
-}
-
-export function useTheme() {
-  const context = useContext(ThemeContext);
-  if (context === undefined) {
-    throw new Error('useTheme must be used within a ThemeProvider');
-  }
-  return context;
-}
+export const ThemeContext = createContext<ThemeContextType | null>(null);

src/hooks/useTheme.tsx

@@ -0,0 +1,15 @@
+import { ThemeContext } from "@/contexts/ThemeContext";
+import { ThemeContextType } from "@/types/theme.interface";
+import { useContext } from "react";
+
+export function useTheme(): ThemeContextType {
+  const context = useContext(ThemeContext);
+
+  if (!context) {
+    throw new Error(
+      "useTheme must be used within a ThemeProvider"
+    );
+  }
+
+  return context;
+}

src/provider/ThemeProvider.tsx

@@ -0,0 +1,66 @@
+import { ThemeContext } from "@/contexts/ThemeContext";
+import { ThemeMode, AccentTheme } from "@/types/theme.interface";
+import { useState, useEffect, useCallback, useMemo } from "react";
+
+const STORAGE_KEYS = {
+  mode: "techzaa-mode",
+  accent: "techzaa-accent",
+} as const;
+
+const isValidMode = (value: unknown): value is ThemeMode =>
+  value === "light" || value === "dark";
+
+const isValidAccent = (value: unknown): value is AccentTheme =>
+  value === "blue" || value === "purple" || value === "green";
+
+export function ThemeProvider({ children }: { children: React.ReactNode }) {
+  const [mode, setMode] = useState<ThemeMode>(() => {
+    if (typeof window === "undefined") return "dark";
+
+    const stored = localStorage.getItem(STORAGE_KEYS.mode);
+
+    return isValidMode(stored) ? stored : "dark";
+  });
+
+  const [accent, setAccent] = useState<AccentTheme>(() => {
+    if (typeof window === "undefined") return "blue";
+
+    const stored = localStorage.getItem(STORAGE_KEYS.accent);
+
+    return isValidAccent(stored) ? stored : "blue";
+  });
+
+  useEffect(() => {
+    if (typeof document === "undefined") return;
+
+    const root = document.documentElement;
+
+    root.classList.remove("light", "dark");
+    root.classList.add(mode);
+
+    root.classList.remove("theme-blue", "theme-purple", "theme-green");
+    root.classList.add(`theme-${accent}`);
+
+    localStorage.setItem(STORAGE_KEYS.mode, mode);
+    localStorage.setItem(STORAGE_KEYS.accent, accent);
+  }, [mode, accent]);
+
+  const toggleMode = useCallback(() => {
+    setMode((prev) => (prev === "dark" ? "light" : "dark"));
+  }, []);
+
+  const value = useMemo(
+    () => ({
+      mode,
+      accent,
+      setMode,
+      setAccent,
+      toggleMode,
+    }),
+    [mode, accent, toggleMode],
+  );
+
+  return (
+    <ThemeContext.Provider value={value}>{children}</ThemeContext.Provider>
+  );
+}

src/types/theme.interface.ts

@@ -0,0 +1,10 @@
+export type ThemeMode = "light" | "dark";
+export type AccentTheme = "blue" | "purple" | "green";
+
+export interface ThemeContextType {
+  mode: ThemeMode;
+  accent: AccentTheme;
+  setMode: React.Dispatch<React.SetStateAction<ThemeMode>>;
+  setAccent: React.Dispatch<React.SetStateAction<AccentTheme>>;
+  toggleMode: () => void;
+}