using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine;
using UnityEngine.UI;
using TMPro;
using Unity.Netcode;
using Unity.Netcode.Transports.UTP;

namespace Colosseum.Editor
{
    public static class LobbySceneBuilder
    {
        [MenuItem("Colosseum/Build Lobby Scene")]
        public static void Build()
        {
            // ── 씬 생성 ──────────────────────────────────────────
            var scene = EditorSceneManager.NewScene(NewSceneSetup.EmptyScene, NewSceneMode.Single);

            // ── NetworkManager ───────────────────────────────────
            var nmGO = new GameObject("NetworkManager");
            var nm = nmGO.AddComponent<NetworkManager>();
            var transport = nmGO.AddComponent<UnityTransport>();
            nm.NetworkConfig = new NetworkConfig
            {
                NetworkTransport = transport
            };

            // ── Network Prefabs 등록 ──────────────────────────────
            var playerPrefabAsset = AssetDatabase.LoadAssetAtPath<GameObject>("Assets/_Game/Prefabs/Player/Prefab_Player_Default.prefab");
            if (playerPrefabAsset != null)
                AddNetworkPrefab(nm, playerPrefabAsset);
            else
                Debug.LogWarning("[LobbySceneBuilder] Player prefab not found at expected path.");

            // ── LobbyManager ─────────────────────────────────────
            var lmGO = new GameObject("LobbyManager");
            lmGO.AddComponent<Unity.Netcode.NetworkObject>();
            lmGO.AddComponent<Colosseum.Network.LobbyManager>();

            // ── Canvas ───────────────────────────────────────────
            var canvasGO = new GameObject("Canvas");
            var canvas = canvasGO.AddComponent<Canvas>();
            canvas.renderMode = RenderMode.ScreenSpaceOverlay;
            canvasGO.AddComponent<CanvasScaler>().uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
            canvasGO.AddComponent<GraphicRaycaster>();

            // EventSystem — New Input System 사용 중이므로 InputSystemUIInputModule 사용
            var esGO = new GameObject("EventSystem");
            esGO.AddComponent<UnityEngine.EventSystems.EventSystem>();
            esGO.AddComponent<UnityEngine.InputSystem.UI.InputSystemUIInputModule>();

            // ── ConnectPanel ──────────────────────────────────────
            var connectPanel = CreatePanel(canvasGO.transform, "ConnectPanel");
            var connectRect = connectPanel.GetComponent<RectTransform>();
            connectRect.anchorMin = Vector2.zero;
            connectRect.anchorMax = Vector2.one;
            connectRect.offsetMin = Vector2.zero;
            connectRect.offsetMax = Vector2.zero;

            var vLayout = connectPanel.AddComponent<VerticalLayoutGroup>();
            vLayout.childAlignment = TextAnchor.MiddleCenter;
            vLayout.spacing = 12;
            vLayout.childForceExpandWidth = false;
            vLayout.childForceExpandHeight = false;
            connectPanel.AddComponent<ContentSizeFitter>();

            CreateLabel(connectPanel.transform, "TitleLabel", "Colosseum Lobby", 36, UIFontRole.Emphasis);
            var ipInput    = CreateInputField(connectPanel.transform, "IpInput", "Host IP (127.0.0.1)", 300, 50);
            var portInput  = CreateInputField(connectPanel.transform, "PortInput", "Port (7777)", 300, 50);
            var hostBtn    = CreateButton(connectPanel.transform, "HostButton", "Host", 200, 50);
            var joinBtn    = CreateButton(connectPanel.transform, "JoinButton", "Join", 200, 50);
            var statusText = CreateLabel(connectPanel.transform, "StatusText", "", 18, UIFontRole.Body);
            statusText.color = Color.yellow;

            // ── LobbyPanel ────────────────────────────────────────
            var lobbyPanel = CreatePanel(canvasGO.transform, "LobbyPanel");
            var lobbyRect = lobbyPanel.GetComponent<RectTransform>();
            lobbyRect.anchorMin = Vector2.zero;
            lobbyRect.anchorMax = Vector2.one;
            lobbyRect.offsetMin = Vector2.zero;
            lobbyRect.offsetMax = Vector2.zero;
            lobbyPanel.SetActive(false);

            var vLayout2 = lobbyPanel.AddComponent<VerticalLayoutGroup>();
            vLayout2.childAlignment = TextAnchor.MiddleCenter;
            vLayout2.spacing = 12;
            vLayout2.childForceExpandWidth = false;
            vLayout2.childForceExpandHeight = false;

            CreateLabel(lobbyPanel.transform, "LobbyTitle", "Waiting Room", 32, UIFontRole.Emphasis);

            // PlayerList: ScrollView 역할을 하는 VerticalLayout 컨테이너
            var playerListGO = new GameObject("PlayerList");
            playerListGO.transform.SetParent(lobbyPanel.transform, false);
            var plRect = playerListGO.AddComponent<RectTransform>();
            plRect.sizeDelta = new Vector2(400, 200);
            var plLayout = playerListGO.AddComponent<VerticalLayoutGroup>();
            plLayout.childAlignment = TextAnchor.UpperCenter;
            plLayout.spacing = 8;
            plLayout.childForceExpandWidth = true;
            plLayout.childForceExpandHeight = false;
            playerListGO.AddComponent<ContentSizeFitter>().verticalFit = ContentSizeFitter.FitMode.PreferredSize;

            var readyBtn  = CreateButton(lobbyPanel.transform, "ReadyButton", "준비", 200, 50);
            var startBtn  = CreateButton(lobbyPanel.transform, "StartButton", "게임 시작", 200, 50);
            var discBtn   = CreateButton(lobbyPanel.transform, "DisconnectButton", "나가기", 200, 50);

            // ── PlayerSlot 프리팹 ─────────────────────────────────
            var slotGO = new GameObject("PlayerSlot");
            var slotRect = slotGO.AddComponent<RectTransform>();
            slotRect.sizeDelta = new Vector2(380, 40);
            var bg = slotGO.AddComponent<Image>();
            bg.color = new Color(0.2f, 0.2f, 0.2f, 0.8f);

            var slotLabel = new GameObject("Label");
            slotLabel.transform.SetParent(slotGO.transform, false);
            var slotLabelRect = slotLabel.AddComponent<RectTransform>();
            slotLabelRect.anchorMin = Vector2.zero;
            slotLabelRect.anchorMax = Vector2.one;
            slotLabelRect.offsetMin = new Vector2(8, 0);
            slotLabelRect.offsetMax = new Vector2(-8, 0);
            var slotTmp = slotLabel.AddComponent<TextMeshProUGUI>();
            slotTmp.text = "Player";
            slotTmp.fontSize = 20;
            slotTmp.alignment = TextAlignmentOptions.MidlineLeft;
            UIFontSetupTool.ApplyRole(slotTmp, UIFontRole.Body);

            System.IO.Directory.CreateDirectory(Application.dataPath + "/_Game/Prefabs/UI");
            var slotPrefab = PrefabUtility.SaveAsPrefabAsset(slotGO, "Assets/_Game/Prefabs/UI/UI_PlayerSlot.prefab");
            Object.DestroyImmediate(slotGO);

            // ── LobbyUI 연결 ──────────────────────────────────────
            var uiGO = new GameObject("UIController");
            var lobbyUI = uiGO.AddComponent<Colosseum.UI.LobbyUI>();

            SetPrivateField(lobbyUI, "connectPanel", connectPanel);
            SetPrivateField(lobbyUI, "ipInput", ipInput.GetComponent<TMP_InputField>());
            SetPrivateField(lobbyUI, "portInput", portInput.GetComponent<TMP_InputField>());
            SetPrivateField(lobbyUI, "hostButton", hostBtn.GetComponent<Button>());
            SetPrivateField(lobbyUI, "joinButton", joinBtn.GetComponent<Button>());
            SetPrivateField(lobbyUI, "connectStatusText", statusText);
            SetPrivateField(lobbyUI, "lobbyPanel", lobbyPanel);
            SetPrivateField(lobbyUI, "playerListParent", playerListGO.transform);
            SetPrivateField(lobbyUI, "playerSlotPrefab", slotPrefab);
            SetPrivateField(lobbyUI, "readyButton", readyBtn.GetComponent<Button>());
            SetPrivateField(lobbyUI, "startButton", startBtn.GetComponent<Button>());
            SetPrivateField(lobbyUI, "disconnectButton", discBtn.GetComponent<Button>());

            // ── 씬 저장 ───────────────────────────────────────────
            EditorSceneManager.SaveScene(scene, "Assets/Scenes/Lobby.unity");

            // ── Build Settings 등록 ───────────────────────────────
            AddSceneToBuildSettings("Assets/Scenes/Lobby.unity", 0);
            AddSceneToBuildSettings("Assets/Scenes/Test.unity", 1);

            Debug.Log("[LobbySceneBuilder] Lobby scene built successfully.");
        }

        [MenuItem("Colosseum/Register Network Prefabs")]
        public static void RegisterNetworkPrefabs()
        {
            var nm = Object.FindFirstObjectByType<NetworkManager>();
            if (nm == null)
            {
                Debug.LogError("[LobbySceneBuilder] NetworkManager not found in current scene.");
                return;
            }

            var playerPrefabAsset = AssetDatabase.LoadAssetAtPath<GameObject>("Assets/_Game/Prefabs/Player/Prefab_Player_Default.prefab");
            if (playerPrefabAsset == null)
            {
                Debug.LogError("[LobbySceneBuilder] Player prefab not found.");
                return;
            }

            // NetworkPrefabsList ScriptableObject 생성 또는 로드
            const string listPath = "Assets/_Game/NetworkPrefabsList.asset";
            var prefabList = AssetDatabase.LoadAssetAtPath<NetworkPrefabsList>(listPath);
            if (prefabList == null)
            {
                prefabList = ScriptableObject.CreateInstance<NetworkPrefabsList>();
                AssetDatabase.CreateAsset(prefabList, listPath);
                AssetDatabase.SaveAssets();
                AssetDatabase.Refresh();
                Debug.Log("[LobbySceneBuilder] Created NetworkPrefabsList asset.");
            }

            // 플레이어 프리팹을 리스트에 추가 (내부 필드명은 "List")
            if (!prefabList.Contains(playerPrefabAsset))
            {
                prefabList.Add(new NetworkPrefab { Prefab = playerPrefabAsset });
                EditorUtility.SetDirty(prefabList);
                AssetDatabase.SaveAssets();
                Debug.Log("[LobbySceneBuilder] Added player prefab to NetworkPrefabsList.");
            }

            // NetworkManager에 리스트 등록 & PlayerPrefab은 null로 (자동 스폰 방지)
            var so = new SerializedObject(nm);
            so.Update();

            var playerPrefabProp = so.FindProperty("NetworkConfig.PlayerPrefab");
            if (playerPrefabProp != null)
                playerPrefabProp.objectReferenceValue = null;

            var nmListsProp = so.FindProperty("NetworkConfig.Prefabs.NetworkPrefabsLists");
            if (nmListsProp != null)
            {
                bool alreadyAdded = false;
                for (int i = 0; i < nmListsProp.arraySize; i++)
                {
                    if (nmListsProp.GetArrayElementAtIndex(i).objectReferenceValue == prefabList)
                    { alreadyAdded = true; break; }
                }
                if (!alreadyAdded)
                {
                    // null 항목 제거 후 추가
                    for (int i = nmListsProp.arraySize - 1; i >= 0; i--)
                        if (nmListsProp.GetArrayElementAtIndex(i).objectReferenceValue == null)
                            nmListsProp.DeleteArrayElementAtIndex(i);

                    int idx = nmListsProp.arraySize;
                    nmListsProp.InsertArrayElementAtIndex(idx);
                    nmListsProp.GetArrayElementAtIndex(idx).objectReferenceValue = prefabList;
                }
            }
            else
            {
                Debug.LogError("[LobbySceneBuilder] Could not find NetworkConfig.Prefabs.NetworkPrefabsLists property.");
            }

            so.ApplyModifiedProperties();
            EditorSceneManager.MarkSceneDirty(nm.gameObject.scene);
            EditorSceneManager.SaveScene(nm.gameObject.scene);
            Debug.Log("[LobbySceneBuilder] NetworkPrefabsList registered. PlayerPrefab cleared. Scene saved.");
        }

        [MenuItem("Colosseum/Open Lobby Scene")]
        public static void OpenLobbyScene()
        {
            if (EditorApplication.isPlaying)
                EditorApplication.isPlaying = false;
            EditorSceneManager.OpenScene("Assets/Scenes/Lobby.unity");
        }

        [MenuItem("Colosseum/Play Lobby Scene")]
        public static void PlayLobbyScene()
        {
            if (!EditorApplication.isPlaying)
            {
                EditorSceneManager.OpenScene("Assets/Scenes/Lobby.unity");
                EditorApplication.isPlaying = true;
            }
        }

        [MenuItem("Colosseum/Stop Play")]
        public static void StopPlay()
        {
            EditorApplication.isPlaying = false;
        }

        // ── 헬퍼 메서드 ──────────────────────────────────────────

        private static GameObject CreatePanel(Transform parent, string name)
        {
            var go = new GameObject(name);
            go.transform.SetParent(parent, false);
            go.AddComponent<RectTransform>();
            var img = go.AddComponent<Image>();
            img.color = new Color(0, 0, 0, 0.6f);
            return go;
        }

        private static GameObject CreateInputField(Transform parent, string name, string placeholder, float w, float h)
        {
            var go = new GameObject(name);
            go.transform.SetParent(parent, false);
            var rect = go.AddComponent<RectTransform>();
            rect.sizeDelta = new Vector2(w, h);
            go.AddComponent<Image>().color = new Color(0.15f, 0.15f, 0.15f, 1f);
            var input = go.AddComponent<TMP_InputField>();

            var textArea = new GameObject("Text Area");
            textArea.transform.SetParent(go.transform, false);
            var taRect = textArea.AddComponent<RectTransform>();
            taRect.anchorMin = Vector2.zero;
            taRect.anchorMax = Vector2.one;
            taRect.offsetMin = new Vector2(8, 2);
            taRect.offsetMax = new Vector2(-8, -2);
            textArea.AddComponent<RectMask2D>();

            var phGO = new GameObject("Placeholder");
            phGO.transform.SetParent(textArea.transform, false);
            var phRect = phGO.AddComponent<RectTransform>();
            phRect.anchorMin = Vector2.zero;
            phRect.anchorMax = Vector2.one;
            phRect.offsetMin = phRect.offsetMax = Vector2.zero;
            var phTmp = phGO.AddComponent<TextMeshProUGUI>();
            phTmp.text = placeholder;
            phTmp.fontSize = 18;
            phTmp.color = new Color(0.5f, 0.5f, 0.5f);
            UIFontSetupTool.ApplyRole(phTmp, UIFontRole.Combat);

            var txtGO = new GameObject("Text");
            txtGO.transform.SetParent(textArea.transform, false);
            var txtRect = txtGO.AddComponent<RectTransform>();
            txtRect.anchorMin = Vector2.zero;
            txtRect.anchorMax = Vector2.one;
            txtRect.offsetMin = txtRect.offsetMax = Vector2.zero;
            var txt = txtGO.AddComponent<TextMeshProUGUI>();
            txt.fontSize = 18;
            txt.color = Color.white;
            UIFontSetupTool.ApplyRole(txt, UIFontRole.Combat);

            input.textViewport = taRect;
            input.placeholder = phTmp;
            input.textComponent = txt;

            return go;
        }

        private static GameObject CreateButton(Transform parent, string name, string label, float w, float h)
        {
            var go = new GameObject(name);
            go.transform.SetParent(parent, false);
            var rect = go.AddComponent<RectTransform>();
            rect.sizeDelta = new Vector2(w, h);
            go.AddComponent<Image>().color = new Color(0.2f, 0.5f, 0.8f, 1f);
            go.AddComponent<Button>();

            var txtGO = new GameObject("Text");
            txtGO.transform.SetParent(go.transform, false);
            var txtRect = txtGO.AddComponent<RectTransform>();
            txtRect.anchorMin = Vector2.zero;
            txtRect.anchorMax = Vector2.one;
            txtRect.offsetMin = txtRect.offsetMax = Vector2.zero;
            var tmp = txtGO.AddComponent<TextMeshProUGUI>();
            tmp.text = label;
            tmp.fontSize = 20;
            tmp.alignment = TextAlignmentOptions.Center;
            tmp.color = Color.white;
            UIFontSetupTool.ApplyRole(tmp, UIFontRole.Combat);

            return go;
        }

        private static TextMeshProUGUI CreateLabel(Transform parent, string name, string text, int size, UIFontRole role = UIFontRole.Body)
        {
            var go = new GameObject(name);
            go.transform.SetParent(parent, false);
            var rect = go.AddComponent<RectTransform>();
            rect.sizeDelta = new Vector2(400, size * 1.6f);
            var tmp = go.AddComponent<TextMeshProUGUI>();
            tmp.text = text;
            tmp.fontSize = size;
            tmp.alignment = TextAlignmentOptions.Center;
            tmp.color = Color.white;
            UIFontSetupTool.ApplyRole(tmp, role);
            return tmp;
        }

        private static void SetPrivateField(object obj, string fieldName, object value)
        {
            var field = obj.GetType().GetField(fieldName,
                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            if (field != null)
                field.SetValue(obj, value);
            else
                Debug.LogWarning($"[LobbySceneBuilder] Field not found: {fieldName}");
        }

        /// <summary>
        /// NetworkPrefabHandler의 내부 List<NetworkPrefab>에 리플렉션으로 프리팹을 추가합니다.
        /// (Prefabs 프로퍼티가 IReadOnlyList이므로 직접 Add 불가)
        /// </summary>
        private static void AddNetworkPrefab(NetworkManager nm, GameObject prefab)
        {
            var handler = nm.NetworkConfig.Prefabs;
            var bindingFlags = System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance;

            // 타입으로 직접 탐색 (필드명은 NGO 버전마다 다를 수 있음)
            System.Collections.Generic.List<NetworkPrefab> list = null;
            foreach (var field in handler.GetType().GetFields(bindingFlags))
            {
                if (field.FieldType == typeof(System.Collections.Generic.List<NetworkPrefab>))
                {
                    list = field.GetValue(handler) as System.Collections.Generic.List<NetworkPrefab>;
                    if (list != null) break;
                }
            }

            if (list == null)
            {
                Debug.LogError("[LobbySceneBuilder] Could not find List<NetworkPrefab> on NetworkPrefabHandler via reflection.");
                return;
            }

            list.Add(new NetworkPrefab { Prefab = prefab });
            EditorUtility.SetDirty(nm);
        }

        private static void AddSceneToBuildSettings(string scenePath, int index)
        {
            var scenes = EditorBuildSettings.scenes;
            foreach (var s in scenes)
                if (s.path == scenePath) return;   // 이미 등록됨

            var newScenes = new EditorBuildSettingsScene[scenes.Length + 1];

            // index 위치에 삽입
            int insertAt = Mathf.Clamp(index, 0, scenes.Length);
            for (int i = 0; i < insertAt; i++)
                newScenes[i] = scenes[i];
            newScenes[insertAt] = new EditorBuildSettingsScene(scenePath, true);
            for (int i = insertAt; i < scenes.Length; i++)
                newScenes[i + 1] = scenes[i];

            EditorBuildSettings.scenes = newScenes;
        }
    }
}