using System.Collections;
using NUnit.Framework;
using UnityEngine;
using UnityEngine.TestTools;
using BaseGames.UI;

namespace BaseGames.Tests.PlayMode
{
    /// <summary>
    /// UIManager 烟雾测试：验证面板栈基本不变式。
    ///
    /// 覆盖：
    ///   · OpenPanel → CloseTopPanel 后栈为空；
    ///   · 嵌套打开（A → B → CloseTop）后 A 仍处于激活态；
    ///   · 重复 OpenPanel 同一面板不会双压栈（HashSet 去重）。
    ///
    /// 注：测试只覆盖框架行为，不验证业务面板（CharmPanel 等）的内部逻辑。
    /// </summary>
    public class UIManagerSmokeTest
    {
        private GameObject _hostGO;
        private UIManager  _manager;
        private GameObject _panelA;
        private GameObject _panelB;

        [SetUp]
        public void SetUp()
        {
            _hostGO  = new GameObject("UIManager_Host");
            _manager = _hostGO.AddComponent<UIManager>();
            _panelA  = new GameObject("PanelA");
            _panelB  = new GameObject("PanelB");
            _panelA.SetActive(false);
            _panelB.SetActive(false);

            // 强制 OnEnable 触发（AddComponent 同帧已触发，这里二次启用保证 ServiceLocator 状态）
            _hostGO.SetActive(false);
            _hostGO.SetActive(true);
        }

        [TearDown]
        public void TearDown()
        {
            Object.DestroyImmediate(_panelA);
            Object.DestroyImmediate(_panelB);
            Object.DestroyImmediate(_hostGO);
        }

        [UnityTest]
        public IEnumerator OpenThenCloseTop_PanelDeactivated()
        {
            _manager.OpenPanel(_panelA);
            yield return null;

            Assert.IsTrue(_panelA.activeSelf, "OpenPanel 应当激活面板");

            _manager.CloseTopPanel();
            yield return null;

            Assert.IsFalse(_panelA.activeSelf, "CloseTopPanel 应当反激活栈顶面板");
        }

        [UnityTest]
        public IEnumerator NestedOpen_PreviousPanelHiddenAndRestored()
        {
            _manager.OpenPanel(_panelA);
            _manager.OpenPanel(_panelB);
            yield return null;

            Assert.IsFalse(_panelA.activeSelf, "嵌套打开时上一层应被隐藏");
            Assert.IsTrue(_panelB.activeSelf,  "新打开的面板应当激活");

            _manager.CloseTopPanel();
            yield return null;

            Assert.IsTrue(_panelA.activeSelf,  "关闭栈顶后上一层应当恢复");
            Assert.IsFalse(_panelB.activeSelf, "关闭后栈顶面板应当反激活");
        }

        [UnityTest]
        public IEnumerator DoubleOpenSamePanel_NoStackDuplication()
        {
            _manager.OpenPanel(_panelA);
            _manager.OpenPanel(_panelA);
            yield return null;

            // 关闭一次后栈应为空
            _manager.CloseTopPanel();
            yield return null;

            Assert.IsFalse(_panelA.activeSelf, "重复打开应被去重；关闭一次后即应隐藏");
        }
    }
}