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

namespace BaseGames.Tests.PlayMode
{
    /// <summary>
    /// ToastManager 队列行为测试：
    ///   · Enqueue 一条后 Toast 激活并最终隐藏
    ///   · 连续 Enqueue 3 条按序串行播放
    ///
    /// 不依赖事件频道（直接调用 Enqueue），不依赖本地化（标题/正文为常量字符串）。
    /// </summary>
    public class ToastManagerTests
    {
        private GameObject       _host;
        private ToastManager     _mgr;
        private ToastNotification _toast;

        [SetUp]
        public void SetUp()
        {
            _host = new GameObject("ToastHost");

            // Toast 预制：CanvasGroup + 子文本
            var toastGO = new GameObject("Toast", typeof(CanvasGroup));
            toastGO.transform.SetParent(_host.transform);
            toastGO.SetActive(false);
            _toast = toastGO.AddComponent<ToastNotification>();
            // 反射注入 _displayDuration / _fadeDuration 减为短值，缩短测试时长
            SetPrivate(_toast, "_displayDuration", 0.05f);
            SetPrivate(_toast, "_fadeDuration",    0.02f);

            _mgr = _host.AddComponent<ToastManager>();
            SetPrivate(_mgr, "_toast", _toast);
            _host.SetActive(false);
            _host.SetActive(true);    // 触发 Awake/OnEnable
        }

        [TearDown]
        public void TearDown() { Object.DestroyImmediate(_host); }

        [UnityTest]
        public IEnumerator Enqueue_ShowsThenHides()
        {
            _mgr.Enqueue("T", "B", null);
            yield return null;
            Assert.IsTrue(_toast.gameObject.activeSelf, "入队后 Toast 应当激活");

            // 总时长 ~= 0.02+0.05+0.02 = 0.09s，再 + 队列等待 0.1s
            yield return new WaitForSecondsRealtime(0.5f);
            Assert.IsFalse(_toast.gameObject.activeSelf, "Toast 自动隐藏未生效");
        }

        [UnityTest]
        public IEnumerator MultipleEnqueue_PlaysSerially()
        {
            _mgr.Enqueue("A", "1", null);
            _mgr.Enqueue("B", "2", null);
            yield return null;
            Assert.IsTrue(_toast.gameObject.activeSelf, "第一条应当立即播放");
            // 不严格验证内容（涉及私有字段），只验证活动状态推进。
            yield return new WaitForSecondsRealtime(1.0f);
            Assert.IsFalse(_toast.gameObject.activeSelf, "两条串行播放后应当全部结束");
        }

        // ── 反射工具 ──────────────────────────────────────────────────────
        private static void SetPrivate(object target, string fieldName, object value)
        {
            var f = target.GetType().GetField(fieldName,
                System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
            f?.SetValue(target, value);
        }
    }
}