using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using NUnit.Framework;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using Vanguard.Api;
using Vanguard.Api.Contracts;
using Vanguard.App;
using Vanguard.Auth;
using Vanguard.Board3D;
using Vanguard.Meta;
using Vanguard.Shared.Protocol;
using Vanguard.State;
using Vanguard.UI;
using BattleView = Vanguard.UI.BattleView;

namespace Vanguard.Tests
{
    public sealed class ClientSmokeTests
    {
        [Test]
        public void Client_Views_Build()
        {
            var config = new AppConfig();
            config.Load();

            var tokens = new TokenStore();
            var api = new ApiClient(config, tokens);
            var player = new PlayerState();
            var auth = new AuthService(api, tokens, player);
            var meta = new MetaService(api, player);

            var canvas = UiKit.CreateCanvas("Test Canvas");

            var login = new LoginView(canvas.transform, config, auth, () => { });
            login.Show("smoke");

            var lobby = new MetaView(
                canvas.transform, auth, player, () => { },
                () => { }, () => { }, () => { }, () => { }, () => { });
            var onboarding = new OnboardingView(
                canvas.transform, auth, meta, () => { }, () => { });
            var decks = new DeckBuilderView(
                canvas.transform, meta, auth, () => { }, _ => { }, _ => { });
            var queue = new QueueView(
                canvas.transform, meta, auth, () => { }, _ => { });
            var store = new StoreView(
                canvas.transform, meta, auth, player, () => { });
            var history = new HistoryView(
                canvas.transform, meta, auth, () => { });
            var battle = new BattleView(
                canvas.transform, meta, () => { });

            Assert.IsNotNull(GameObject.Find("LoginScreen"));
            Assert.IsTrue(Exists("MetaScreen"));
            Assert.IsTrue(Exists("OnboardingScreen"));
            Assert.IsTrue(Exists("DeckBuilderScreen"));
            Assert.IsTrue(Exists("StoreScreen"));
            Assert.IsTrue(Exists("HistoryScreen"));
            Assert.IsTrue(Exists("ReplayScreen"));
            Assert.IsTrue(Exists("QueueScreen"));
            Assert.IsTrue(Exists("BattleScreen"));

            Assert.IsNotNull(
                Resources.Load<Texture2D>("CardArt/td01_005"),
                "TD01 card art is not imported");
            var standardBack = Resources.Load<Texture2D>("CardArt/vanguard_back");
            Assert.IsNotNull(standardBack, "Standard Vanguard card back is not imported");
            Assert.AreEqual(standardBack, CardArt.Back.texture);

            var artGo = new GameObject("ArtProbe", typeof(RectTransform), typeof(Image));
            var artImage = artGo.GetComponent<Image>();
            CardImageService.Apply(artImage, "td01_005", null);
            Assert.IsNotNull(artImage.sprite, "CardImageService did not load real card art");
            Object.DestroyImmediate(artGo);

            // После смены сцены старые views не должны реагировать на PlayerState.
            lobby.Dispose();
            store.Dispose();
            player.Apply(new MeResponse
            {
                UserName = "after-dispose",
                Gold = 10,
                Dust = 2,
                Tokens = 1,
            });

            Cleanup();
        }

        [Test]
        public void Localization_Translates_Static_And_Dynamic_Strings()
        {
            Loc.SetLanguage(UiLanguage.Ru);
            Assert.AreEqual("Коллекция", Loc.Translate("Коллекция"));

            Loc.SetLanguage(UiLanguage.En);
            Assert.AreEqual("Collection", Loc.Translate("Коллекция"));
            Assert.AreEqual("Grade: all", Loc.Translate("Ранг: все"));
            Assert.AreEqual("Cards in collection: 12", Loc.Translate("Карт в коллекции: 12"));
            Assert.AreEqual("Victory!", Loc.Translate("Победа!"));
            Assert.AreEqual("Sentinel: yes · Boost: no", Loc.Translate("Sentinel: да · Boost: нет"));

            Loc.SetLanguage(UiLanguage.Ru);

            var go = new GameObject("LocalizedLabel", typeof(RectTransform), typeof(Text));
            var label = go.GetComponent<Text>();
            var localized = go.AddComponent<LocalizedText>();
            localized.Initialize("Коллекция");
            Assert.AreEqual("Коллекция", label.text);

            Loc.SetLanguage(UiLanguage.En);
            Assert.AreEqual("Collection", label.text);

            label.text = "Магазин";
            localized.ApplyNow();
            Assert.AreEqual("Store", label.text);

            Loc.SetLanguage(UiLanguage.Ru);
            Assert.AreEqual("Магазин", label.text);
            Object.DestroyImmediate(go);
        }

        [Test]
        public void Canvas_Reference_Resolution_Is_1920x1080()
        {
            var canvas = UiKit.CreateCanvas("Reference Resolution Canvas");
            try
            {
                var scaler = canvas.GetComponent<CanvasScaler>();
                Assert.IsNotNull(scaler);
                Assert.AreEqual(1920f, scaler.referenceResolution.x);
                Assert.AreEqual(1080f, scaler.referenceResolution.y);
            }
            finally
            {
                Object.DestroyImmediate(canvas.gameObject);
                var eventSystem = Object.FindAnyObjectByType<EventSystem>();
                if (eventSystem != null)
                    Object.DestroyImmediate(eventSystem.gameObject);
            }
        }

        [Test]
        public void Battle_Layout_Fits_Reference_Resolution()
        {
            var config = new AppConfig();
            config.Load();
            var tokens = new TokenStore();
            var api = new ApiClient(config, tokens);
            var player = new PlayerState();
            var auth = new AuthService(api, tokens, player);
            var meta = new MetaService(api, player);
            var canvas = UiKit.CreateCanvas("Layout Test Canvas");

            try
            {
                var battle = new BattleView(canvas.transform, meta, () => { });
                var screen = Resources.FindObjectsOfTypeAll<GameObject>()
                    .First(go => go.name == "BattleScreen");
                screen.SetActive(true);

                var self = ReferenceRect(FindRect("ZoneBlocksSelf"));
                var opponent = ReferenceRect(FindRect("ZoneBlocksOpponent"));
                var phase = ReferenceRect(FindRect("PhasePanel"));
                var stats = ReferenceRect(FindRect("CombatStats"));

                AssertWithinScreen(self, "self zones");
                AssertWithinScreen(opponent, "opponent zones");
                AssertWithinScreen(phase, "phase panel");
                AssertWithinScreen(stats, "combat stats");
                Assert.IsFalse(self.Overlaps(opponent));
                Assert.IsFalse(self.Overlaps(phase));
                Assert.IsFalse(opponent.Overlaps(phase));
                Assert.IsFalse(opponent.Overlaps(stats));
                Assert.IsFalse(phase.Overlaps(stats));
            }
            finally
            {
                Object.DestroyImmediate(canvas.gameObject);
                Cleanup();
            }
        }

        private static RectTransform FindRect(string name) =>
            Resources.FindObjectsOfTypeAll<GameObject>()
                .Where(go => go.scene.IsValid() && go.name == name)
                .Select(go => go.GetComponent<RectTransform>())
                .First(rect => rect != null);

        private static Rect ReferenceRect(RectTransform rect)
        {
            var size = rect.sizeDelta;
            var anchor = new Vector2(
                Mathf.Lerp(0f, 1920f, rect.anchorMin.x),
                Mathf.Lerp(0f, 1080f, rect.anchorMin.y));
            return new Rect(
                anchor + rect.anchoredPosition - Vector2.Scale(size, rect.pivot),
                size);
        }

        private static void AssertWithinScreen(Rect rect, string name)
        {
            Assert.GreaterOrEqual(rect.xMin, 0f, name + " left");
            Assert.GreaterOrEqual(rect.yMin, 0f, name + " bottom");
            Assert.LessOrEqual(rect.xMax, 1920f, name + " right");
            Assert.LessOrEqual(rect.yMax, 1080f, name + " top");
        }

        [Test]
        public void Battle_Renders_3D_Damage_And_Rested_Cards()
        {
            var config = new AppConfig();
            config.Load();
            var tokens = new TokenStore();
            var api = new ApiClient(config, tokens);
            var player = new PlayerState();
            var auth = new AuthService(api, tokens, player);
            var meta = new MetaService(api, player);
            var canvas = UiKit.CreateCanvas("Test Canvas");

            var battle = new BattleView(canvas.transform, meta, () => { });
            var screen = Resources.FindObjectsOfTypeAll<GameObject>()
                .First(go => go.name == "BattleScreen");
            screen.SetActive(true);

            CardView Card(string id, int instance, bool rested = false) => new CardView
            {
                PrintingId = id,
                InstanceId = instance,
                Rested = rested,
                FaceUp = true,
                Power = 8000,
                BasePower = 8000,
                Critical = 1,
                BaseCritical = 1,
            };

            var self = new PlayerView
            {
                Index = 0,
                Name = "Me",
                Vanguard = Card("BT01/001EN", 1),
                RearGuards = new CardView?[5],
                Hand = new List<CardView> { Card("BT01/042EN", 2) },
                Soul = new List<CardView> { Card("BT01/003EN", 3) },
                FaceDownDamage = 2,
                FaceUpDamage = new List<CardView> { Card("BT01/056EN", 4) },
                DeckCount = 40,
                Drop = new List<CardView>(),
            };
            self.RearGuards[3] = Card("BT01/042EN", 5, rested: true);

            var opponent = new PlayerView
            {
                Index = 1,
                Name = "Opponent",
                Vanguard = Card("BT01/001EN", 6),
                RearGuards = new CardView?[5],
                Hand = new List<CardView>(),
                Soul = new List<CardView>(),
                FaceDownDamage = 1,
                FaceUpDamage = new List<CardView>(),
                DeckCount = 40,
                Drop = new List<CardView>(),
            };

            var match = new MatchView
            {
                MatchId = "render-test",
                You = 0,
                ActivePlayer = 0,
                Phase = GamePhase.Main,
                Players = new List<PlayerView> { self, opponent },
                Battle = new Vanguard.Shared.Protocol.BattleView
                {
                    GuardCards = new List<CardView> { Card("BT01/011EN", 7) },
                },
                Clock = new ClockView(),
                LegalIntents = new List<IntentPayload>(),
            };

            Resources.FindObjectsOfTypeAll<GameBoard3D>()
                .FirstOrDefault()
                ?.SetVisible(true);

            typeof(BattleView)
                .GetField("_view", BindingFlags.Instance | BindingFlags.NonPublic)!
                .SetValue(battle, match);
            typeof(BattleView)
                .GetMethod("Render", BindingFlags.Instance | BindingFlags.NonPublic)!
                .Invoke(battle, null);

            Assert.IsTrue(Exists("GameBoard3D"));

            var cards = Resources.FindObjectsOfTypeAll<Card3D>()
                .Where(card => card.gameObject.activeInHierarchy)
                .ToList();
            Assert.GreaterOrEqual(cards.Count, 3);

            var rested = cards.FirstOrDefault(card =>
                card.Ref.Zone == BoardZone.RearGuard
                && card.Ref.Player == 0
                && card.Ref.Slot == 3);
            Assert.IsNotNull(rested, "Rested rear-guard was not rendered in 3D");
            Assert.IsTrue(rested.IsRested);
            Assert.AreEqual(90f, Mathf.Abs(Mathf.DeltaAngle(rested.TargetYaw, 0f)), 0.1f);

            var damage = cards.Where(card =>
                card.Ref.Zone == BoardZone.Damage
                && card.Ref.Player == 0).ToList();
            Assert.AreEqual(3, damage.Count);
            Assert.IsFalse(damage.Single(card => card.Ref.Index == 2).IsFaceUp);
            Assert.AreEqual(
                -90f,
                Mathf.DeltaAngle(0f, damage.Single(card => card.Ref.Index == 0).TargetYaw),
                0.1f,
                "Damage cards must be turned counter-clockwise");

            Assert.IsTrue(cards.Any(card =>
                card.Ref.Zone == BoardZone.Guardian
                && card.Ref.InstanceId == 7));

            var selfZoneRoot = Resources.FindObjectsOfTypeAll<GameObject>()
                .FirstOrDefault(go => go.name == "ZoneBlocksSelf");
            var opponentZoneRoot = Resources.FindObjectsOfTypeAll<GameObject>()
                .FirstOrDefault(go => go.name == "ZoneBlocksOpponent");
            Assert.IsNotNull(selfZoneRoot);
            Assert.IsNotNull(opponentZoneRoot);

            var selfLabels = selfZoneRoot.GetComponentsInChildren<Text>();
            var opponentLabels = opponentZoneRoot.GetComponentsInChildren<Text>();
            Assert.IsTrue(selfLabels.Any(text => text.text.Contains("Рука 1")));
            Assert.IsTrue(selfLabels.Any(text => text.text.Contains("Душа 1")));
            Assert.IsTrue(opponentLabels.Any(text => text.text.Contains("Рука 0")));

            Cleanup();
        }

        private static bool Exists(string name) =>
            Resources.FindObjectsOfTypeAll<GameObject>().Any(go => go.name == name);

        private static void Cleanup()
        {
            foreach (var board in Resources.FindObjectsOfTypeAll<GameBoard3D>())
            {
                if (board != null)
                    Object.DestroyImmediate(board.gameObject);
            }

            var canvas = GameObject.Find("Test Canvas");
            if (canvas != null)
                Object.DestroyImmediate(canvas);

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