package com.xly.erp.common.security;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Test;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicReference;

import static org.junit.jupiter.api.Assertions.*;

class LoginContextTest {

    @AfterEach
    void tearDown() {
        LoginContext.clear();
    }

    @Test
    void setAndCurrent_returnsSameUser() {
        LoginContext.LoginUser u = new LoginContext.LoginUser(42, "alice", "NORMAL", "HQ");
        LoginContext.set(u);
        assertSame(u, LoginContext.current());
    }

    @Test
    void clear_returnsNullForCurrent() {
        LoginContext.set(new LoginContext.LoginUser(1, "x", "NORMAL", "HQ"));
        LoginContext.clear();
        assertNull(LoginContext.current());
    }

    @Test
    void setAndCurrent_isolatedPerThread() throws InterruptedException {
        LoginContext.set(new LoginContext.LoginUser(1, "main", "NORMAL", "HQ"));

        AtomicReference<LoginContext.LoginUser> seen = new AtomicReference<>();
        CountDownLatch latch = new CountDownLatch(1);
        Thread t = new Thread(() -> {
            seen.set(LoginContext.current());
            LoginContext.set(new LoginContext.LoginUser(2, "child", "SUPER_ADMIN", "HQ"));
            latch.countDown();
        });
        t.start();
        latch.await();
        t.join();

        assertNull(seen.get(), "子线程不应继承父线程 ThreadLocal");
        assertEquals("main", LoginContext.current().username(),
                "父线程上下文不应被子线程改动影响");
    }
}