function getToken(): string | null {
    return localStorage.getItem('token');
}

function setToken(token: string): void {
    localStorage.setItem('token', token);
}

function removeToken(): void {
    localStorage.removeItem('token');
}

function getRefreshToken(): string | null {
    return localStorage.getItem('refresh_token');
}

function setRefreshToken(token: string): void {
    localStorage.setItem('refresh_token', token);
}

function removeRefreshToken(): void {
    localStorage.removeItem('refresh_token');
}

function getTheme(): string {
    return localStorage.getItem('theme') || 'tokyo-night';
}

function setTheme(theme: string): void {
    localStorage.setItem('theme', theme);
}

function getSelectedLibrary(): string | null {
    return localStorage.getItem('selectedLibrary');
}

function setSelectedLibrary(libraryId: string): void {
    localStorage.setItem('selectedLibrary', libraryId);
}

function getSelectedBook(): string | null {
    return localStorage.getItem('selectedBook');
}

function setSelectedBook(bookId: string): void {
    localStorage.setItem('selectedBook', bookId);
}

function clearAll(): void {
    localStorage.clear();
}

(window as any).storage = {
    getToken,
    setToken,
    removeToken,
    getRefreshToken,
    setRefreshToken,
    removeRefreshToken,
    getTheme,
    setTheme,
    getSelectedLibrary,
    setSelectedLibrary,
    getSelectedBook,
    setSelectedBook,
    clearAll
};

export {
    getToken,
    setToken,
    removeToken,
    getRefreshToken,
    setRefreshToken,
    removeRefreshToken,
    getTheme,
    setTheme,
    getSelectedLibrary,
    setSelectedLibrary,
    getSelectedBook,
    setSelectedBook,
    clearAll
};