import { createContext, useContext, useState, ReactNode } from "react";
import { userService } from "../api/userService";

interface AuthContextType {
  token: string | null;
  login: (username: string, password: string) => Promise<any>;
  logout: () => void;
  isAuthenticated: () => boolean;
}

const AuthContext = createContext<AuthContextType | undefined>(undefined);

interface AuthProviderProps {
  children: ReactNode;
}

export const AuthProvider = ({ children }: AuthProviderProps) => {
  const [token, setToken] = useState(localStorage.getItem("access_token"));

  const login = async (username: string, password: string) => {
    try {
      const data = await userService.login(username, password);
      setToken(data.access_token);
      localStorage.setItem("access_token", data.access_token);
      localStorage.setItem("refresh_token", data.refresh_token);
      return data;
    } catch (error) {
      console.error("Login failed:", error);
      throw error;
    }
  };

  const logout = () => {
    setToken(null);
    localStorage.removeItem("access_token");
    localStorage.removeItem("refresh_token");
  };

  const isAuthenticated = () => {
    return token !== null && token !== undefined && token !== "";
  };

  return (
    <AuthContext.Provider value={{ token, login, logout, isAuthenticated }}>
      {children}
    </AuthContext.Provider>
  );
};

export const useAuth = () => {
  const context = useContext(AuthContext);
  if (context === undefined) {
    throw new Error("useAuth must be used within an AuthProvider");
  }
  return context;
};