"use client";

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

const TOKEN_KEY = "k-tv-token";

interface AuthContextValue {
  token: string | null;
  /** True once the initial localStorage read has completed */
  isLoaded: boolean;
  setToken: (token: string | null) => void;
}

const AuthContext = createContext<AuthContextValue | null>(null);

export function AuthProvider({ children }: { children: ReactNode }) {
  const [token, setTokenState] = useState<string | null>(() => {
    try {
      return localStorage.getItem(TOKEN_KEY);
    } catch {
      return null;
    }
  });
  // isLoaded is always true: lazy init above reads localStorage synchronously
  const [isLoaded] = useState(true);

  const setToken = (t: string | null) => {
    setTokenState(t);
    if (t) {
      localStorage.setItem(TOKEN_KEY, t);
    } else {
      localStorage.removeItem(TOKEN_KEY);
    }
  };

  return (
    <AuthContext.Provider value={{ token, isLoaded, setToken }}>
      {children}
    </AuthContext.Provider>
  );
}

export function useAuthContext() {
  const ctx = useContext(AuthContext);
  if (!ctx) throw new Error("useAuthContext must be used within AuthProvider");
  return ctx;
}