"use client";

import { useState, useEffect, useCallback } from "react";

export interface SessionUser {
  userId: number;
  username: string;
  email: string;
}

interface SessionState {
  user: SessionUser | null;
  isLoading: boolean;
  isAuthenticated: boolean;
}

/**
 * Hook para gerenciar sessão do usuário
 */
export function useSession() {
  const [session, setSession] = useState<SessionState>({
    user: null,
    isLoading: true,
    isAuthenticated: false,
  });

  /**
   * Verifica a sessão atual
   */
  const checkSession = useCallback(async () => {
    try {
      const response = await fetch("/api/auth/session", {
        method: "GET",
        credentials: "include",
      });

      const data = await response.json();

      if (data.success && data.authenticated) {
        setSession({
          user: data.user,
          isLoading: false,
          isAuthenticated: true,
        });
      } else {
        setSession({
          user: null,
          isLoading: false,
          isAuthenticated: false,
        });
      }
    } catch (error) {
      console.error("Erro ao verificar sessão:", error);
      setSession({
        user: null,
        isLoading: false,
        isAuthenticated: false,
      });
    }
  }, []);

  /**
   * Encerra a sessão
   */
  const logout = useCallback(async () => {
    try {
      await fetch("/api/auth/session", {
        method: "DELETE",
        credentials: "include",
      });

      setSession({
        user: null,
        isLoading: false,
        isAuthenticated: false,
      });

      // Recarregar página para limpar estado
      window.location.href = "/";
    } catch (error) {
      console.error("Erro ao fazer logout:", error);
    }
  }, []);

  /**
   * Atualiza a sessão após login
   */
  const refreshSession = useCallback(async () => {
    await checkSession();
  }, [checkSession]);

  // Verificar sessão ao montar componente
  useEffect(() => {
    checkSession();
  }, [checkSession]);

  return {
    user: session.user,
    isLoading: session.isLoading,
    isAuthenticated: session.isAuthenticated,
    logout,
    refreshSession,
  };
}