import { useState } from "react";
import { useNavigate } from "react-router-dom";
import { API_URL } from "../config/authConstants";
import { useAuthContext } from "../context/AuthContext";

export function useAuth() {
  const navigate = useNavigate();
  const { login: saveAuth } = useAuthContext();
  const [loading, setLoading] = useState(false);
  const [error,   setError]   = useState("");

  const login = async (login, password) => {
    if (!login || !password) { setError("Enter login and password"); return; }
    setLoading(true); setError("");

    try {
      const res = await fetch(`${API_URL}/api/v1/auth`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ login, password }),
      });

      if (!res.ok) {
        const data = await res.json().catch(() => ({}));
        throw new Error(data.message || "Invalid login or password");
      }

      const { token, user } = await res.json();

      // Сохраняем в глобальный контекст + localStorage
      saveAuth(user, token);

      navigate("/feed");
    } catch (err) {
      setError(err.message);
    } finally {
      setLoading(false);
    }
  };

  return { login, loading, error };
}