using System.Collections;
using System.Linq;
using NUnit.Framework;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.TestTools;
using Vanguard.App;

namespace Vanguard.Tests
{
    public sealed class AppBootstrapPlayModeTests
    {
        [UnityTest]
        public IEnumerator App_Bootstraps_And_Shows_A_Screen()
        {
            if (Object.FindAnyObjectByType<VanguardApp>() == null)
            {
                var go = new GameObject("Test App");
                go.AddComponent<VanguardApp>();
            }

            yield return null;
            yield return null;

            Assert.IsNotNull(Object.FindAnyObjectByType<VanguardApp>());
            Assert.IsNotNull(GameObject.Find("Vanguard Canvas"));

            var login = Resources.FindObjectsOfTypeAll<GameObject>()
                .FirstOrDefault(go => go.name == "LoginScreen");
            var onboarding = Resources.FindObjectsOfTypeAll<GameObject>()
                .FirstOrDefault(go => go.name == "OnboardingScreen");
            var meta = Resources.FindObjectsOfTypeAll<GameObject>()
                .FirstOrDefault(go => go.name == "MetaScreen");
            var hierarchy = string.Join(
                "\n",
                Resources.FindObjectsOfTypeAll<GameObject>()
                    .Where(go => go.name.EndsWith("Screen") || go.name == "Vanguard Canvas")
                    .Select(go => go.name + ": activeSelf=" + go.activeSelf + ", activeInHierarchy=" + go.activeInHierarchy));

            var hasStartScreen = (login != null && login.activeInHierarchy)
                || (onboarding != null && onboarding.activeInHierarchy)
                || (meta != null && meta.activeInHierarchy);

            Assert.IsTrue(
                hasStartScreen,
                "Ни LoginScreen, ни OnboardingScreen, ни MetaScreen не активны.\nInitError: "
                    + VanguardApp.LastInitializationError + "\n" + hierarchy);

            Cleanup();
            yield return null;
        }

        private static void Cleanup()
        {
            var app = Object.FindAnyObjectByType<VanguardApp>();
            if (app != null)
                Object.Destroy(app.gameObject);

            var canvas = GameObject.Find("Vanguard Canvas");
            if (canvas != null)
                Object.Destroy(canvas);

            var eventSystem = Object.FindAnyObjectByType<EventSystem>();
            if (eventSystem != null)
                Object.Destroy(eventSystem.gameObject);
        }
    }
}