import type { User } from "./types"

export const setAuthToken = (token: string) => {
  if (typeof window !== "undefined") {
    localStorage.setItem("auth_token", token)
  }
}

export const getAuthToken = (): string | null => {
  if (typeof window === "undefined") return null
  return localStorage.getItem("auth_token")
}

export const removeAuthToken = () => {
  if (typeof window !== "undefined") {
    localStorage.removeItem("auth_token")
    localStorage.removeItem("user")
  }
}

export const setUser = (user: User) => {
  if (typeof window !== "undefined") {
    localStorage.setItem("user", JSON.stringify(user))
  }
}

export const getUser = (): User | null => {
  if (typeof window === "undefined") return null
  const userStr = localStorage.getItem("user")
  if (!userStr) return null
  try {
    return JSON.parse(userStr)
  } catch (error) {
    console.error("Error parsing user from localStorage:", error)
    return null
  }
}

export const isAuthenticated = (): boolean => {
  return !!getAuthToken()
}

export const isAdmin = (): boolean => {
  const user = getUser()
  return user?.role === "admin"
}

export const isObserver = (): boolean => {
  const user = getUser()
  return user?.role === "observer"
}