using AOT.Boot;
using HotUpdate.Net;
using HotUpdate.UI;
using UnityEngine;

namespace HotUpdate.Gameplay
{
    /// <summary>
    /// M4 玩法骨架：挂 HUD、角色、网络状态；处理公告与断线重连提示。
    /// </summary>
    public sealed class GameplayBootstrap : MonoBehaviour
    {
        BootContext _ctx;
        GameNet _net;
        MainHudView _hud;
        ConfirmDialogView _dialog;
        PrototypeFlow _prototype;
        UiPrefabLoader _musicLoader;
        GameObject _musicInstance;
        bool _maintenanceLock;
        string _maintenanceMessage;
        string _reconnectMessage;

        public void Bind(BootContext ctx, GameNet net)
        {
            _ctx = ctx;
            _net = net;
        }

        void Start()
        {
            WireNet();
            StartCoroutine(EnsureUi());

            var plaza = gameObject.AddComponent<TownSquareSpawner>();
            plaza.Bind(_ctx);
            StartCoroutine(SpawnWorld(plaza));
        }

        System.Collections.IEnumerator SpawnWorld(TownSquareSpawner plaza)
        {
            yield return plaza.SpawnCo();
            var spawner = gameObject.AddComponent<CharacterSpawner>();
            spawner.Bind(_ctx);
            spawner.Spawn();
        }

        System.Collections.IEnumerator EnsureUi()
        {
            var uiRoot = new GameObject("UiRoot");
            DontDestroyOnLoad(uiRoot);
            var mgr = uiRoot.AddComponent<UiManager>();
            mgr.Init(uiRoot.transform, new UiPrefabLoader(_ctx?.Package), _ctx?.UiTheme);

            GameObject hudGo = null;
            yield return mgr.OpenAsync(MainHudView.PrefabName, go => hudGo = go);
            _hud = hudGo != null ? hudGo.GetComponent<MainHudView>() : null;
            if (_hud == null && hudGo != null)
                _hud = hudGo.AddComponent<MainHudView>();
            _hud?.Bind();
            _hud?.SetStatus(_maintenanceLock ? "服务器维护中" : FriendlyStatus(_net?.Status));
            _hud?.SetPid(_net?.Session?.Pid ?? 0);
            _hud?.ShowReconnect(!_maintenanceLock && _reconnectMessage != null, _reconnectMessage);
            if (_hud != null)
            {
                _hud.OnReconnectClicked += () => _net?.RequestReconnect();
                _hud.OnHomeActionClicked += ShowHomeFeature;
            }

            GameObject dlgGo = null;
            yield return mgr.OpenAsync(ConfirmDialogView.PrefabName, go => dlgGo = go);
            if (dlgGo != null)
            {
                dlgGo.SetActive(false);
                _dialog = dlgGo.GetComponent<ConfirmDialogView>();
                if (_dialog == null) _dialog = dlgGo.AddComponent<ConfirmDialogView>();
                _dialog.Bind();
            }
            _prototype = gameObject.AddComponent<PrototypeFlow>();
            _prototype.Bind(_ctx, mgr, _hud, _dialog, () => _net?.Session, () => _net?.RenewSession());
            _prototype.SetLocked(_maintenanceLock);
            StartCoroutine(EnsureMusic());
            if (_maintenanceLock) _dialog?.Show("维护公告", _maintenanceMessage);
            else MaybeShowBootNotice();
        }

        System.Collections.IEnumerator EnsureMusic()
        {
            if (_musicInstance != null || _musicLoader != null) yield break;
            _musicLoader = new UiPrefabLoader(_ctx?.Package, MainMenuMusic.PrefabFolder);
            GameObject prefab = null;
            yield return _musicLoader.LoadAsync(MainMenuMusic.PrefabName, loaded => prefab = loaded);
            if (prefab == null)
            {
                Debug.LogWarning("[MainMenuMusic] Music prefab unavailable in the current Art package.");
                yield break;
            }
            _musicInstance = Instantiate(prefab, transform, false);
            _musicInstance.name = MainMenuMusic.PrefabName;
            _prototype?.BindMusic(_musicInstance.GetComponent<MainMenuMusic>());
        }

        void OnDestroy()
        {
            StopAllCoroutines();
            if (_musicInstance != null) Destroy(_musicInstance);
            _musicLoader?.Dispose();
        }

        static string FriendlyStatus(string status)
        {
            if (string.IsNullOrEmpty(status) || status == "idle") return "启动中…";
            if (status == "auth…") return "正在登录…";
            if (status.StartsWith("authed")) return "登录成功，正在连接…";
            if (status == "ws connected" || status == "ws reconnected") return "已连接";
            if (status.StartsWith("ws connecting")) return "正在连接游戏服务…";
            if (status.StartsWith("ws reconnecting")) return "正在恢复连接…";
            if (status.StartsWith("ws down") || status.StartsWith("ws fail")) return "游戏服务连接已断开";
            return status;
        }

        void ShowHomeFeature(string key)
        {
            if (_maintenanceLock || _dialog == null) return;
            if (_prototype != null && _prototype.Handle(key == "Home" ? "Camp" : key)) return;
            if (key == "Home") { _dialog.Hide(); return; }
            string title;
            switch (key)
            {
                case "Profile": title = "探险家档案"; break;
                case "Coin": title = "金币"; break;
                case "Diamond": title = "钻石"; break;
                case "Energy": title = "冒险体力"; break;
                case "Tasks": title = "今日目标"; break;
                case "Settings": title = "设置"; break;
                case "Events": title = "小镇活动"; break;
                case "Daily": title = "每日签到"; break;
                case "Rank": title = "冒险排行"; break;
                case "Mail": title = "小镇邮件"; break;
                case "Rewards": title = "宝箱奖励"; break;
                case "Bag": title = "背包"; break;
                case "Adventure": case "Battle": title = "开始冒险"; break;
                case "Shop": title = "小镇商店"; break;
                case "Pets": title = "伙伴图鉴"; break;
                case "Pinball": title = "弹珠乐园"; break;
                default: return;
            }
            _dialog.Show(title, "这片新天地正在建设中，\n期待与你一起开启新的旅程！");
        }

        void WireNet()
        {
            if (_net == null) return;
            _net.OnStatus += s => _hud?.SetStatus(FriendlyStatus(s));
            _net.OnLoginFailed += error =>
            {
                _reconnectMessage = "登录服务暂不可用，请重试。";
                _hud?.ShowReconnect(true, _reconnectMessage);
            };
            _net.OnAuthed += session => _hud?.SetPid(session != null ? session.Pid : 0);
            _net.OnWsReady += () =>
            {
                if (_maintenanceLock) return;
                _reconnectMessage = null;
                _hud?.ShowReconnect(false);
                _hud?.SetStatus("已连接");
            };
            _net.OnWsDisconnected += reason =>
            {
                if (_maintenanceLock) return;
                _reconnectMessage = $"网络已断开（{reason}），正在重连…";
                _hud?.ShowReconnect(true, _reconnectMessage);
            };
            _net.OnReconnecting += attempt =>
            {
                if (_maintenanceLock) return;
                _reconnectMessage = $"正在重连…（第 {attempt} 次）";
                _hud?.ShowReconnect(true, _reconnectMessage);
            };
            _net.OnMaintenance += msg =>
            {
                _maintenanceLock = true;
                _prototype?.SetLocked(true);
                _maintenanceMessage = string.IsNullOrEmpty(msg) ? "服务器维护中，请稍后再试。" : msg;
                _hud?.ShowReconnect(false);
                _hud?.SetStatus("服务器维护中");
                _dialog?.Show("维护公告", _maintenanceMessage);
            };
            _net.OnWsMessage += TryHandleProtocol;
        }

        void MaybeShowBootNotice()
        {
            if (_ctx == null || string.IsNullOrEmpty(_ctx.Notice)) return;
            _dialog?.Show("公告", _ctx.Notice);
        }

        void TryHandleProtocol(string json)
        {
            if (string.IsNullOrEmpty(json)) return;
            // 轻量解析，避免引入完整 JSON 库依赖
            if (json.IndexOf("\"op\":\"maintenance\"", System.StringComparison.Ordinal) >= 0 ||
                json.IndexOf("\"op\": \"maintenance\"", System.StringComparison.Ordinal) >= 0)
            {
                var msg = ExtractJsonString(json, "message");
                _net?.NotifyMaintenance(msg);
            }
        }

        static string ExtractJsonString(string json, string key)
        {
            var token = $"\"{key}\"";
            var i = json.IndexOf(token, System.StringComparison.Ordinal);
            if (i < 0) return null;
            i = json.IndexOf(':', i);
            if (i < 0) return null;
            i = json.IndexOf('"', i + 1);
            if (i < 0) return null;
            var j = json.IndexOf('"', i + 1);
            if (j < 0) return null;
            return json.Substring(i + 1, j - i - 1);
        }
    }
}