using System;
using System.Collections;
using System.Collections.Generic;
using ShiroginSDK.Runtime.Core.SDK;
using ShiroginSDK.Runtime.Core.Utils;
using ShiroginSDK.Runtime.Modules.Data.Scripts;
using ShiroginSDK.Runtime.Modules.Events;
using ShiroginSDK.Runtime.Services.Base;
using ShiroginSDK.Runtime.Services.Interfaces;
using UnityEngine;

#if SHIROGIN_FIREBASE_REMOTE_CONFIG
using Firebase.RemoteConfig;
#endif

namespace ShiroginSDK.Runtime.Services.Implementations.RemoteConfig
{
#if SHIROGIN_FIREBASE_REMOTE_CONFIG
    /// <summary>
    ///     Fetches and caches Firebase Remote Config data for ShiroginSDK.
    ///     Automatically reads selected group and enable flags from SDKConfig.
    /// </summary>
    public class RemoteConfigService : ServiceBase, IRemoteConfigService
    {
        private ShiroginConfig _config;
        private string _configKey;
        private bool _initialized;

        // ---------------------------------------------------------
        // Value Accessors
        // ---------------------------------------------------------
        private string CachedJson
        {
            get
            {
                var dataService = ServiceLocator.Get<IDataService>();
                return dataService?.Get<RemoteConfigData>()?.CachedJson ?? "{}";
            }
        }

        public void ForceRefresh()
        {
            CoroutineRunner.Start(FetchAndCacheRoutine());
        }

        public int GetInt(string key, int defaultValue = 0)
        {
            if (TryGetValue(key, out var raw) && int.TryParse(raw, out var val))
                return val;
            return defaultValue;
        }

        public float GetFloat(string key, float defaultValue = 0f)
        {
            if (TryGetValue(key, out var raw) && float.TryParse(raw, out var val))
                return val;
            return defaultValue;
        }

        public bool GetBool(string key, bool defaultValue = false)
        {
            if (TryGetValue(key, out var raw))
                return raw.Equals("true", StringComparison.OrdinalIgnoreCase);
            return defaultValue;
        }

        public string GetString(string key, string defaultValue = "")
        {
            if (TryGetValue(key, out var raw))
                return raw;
            return defaultValue;
        }

        // ---------------------------------------------------------
        // Lifecycle
        // ---------------------------------------------------------
        protected override void OnInitialize()
        {
            _config = ShiroginConfig.Load();

            if (_config == null)
            {
                Debug.LogError("[RemoteConfigService] ❌ SDKConfig not found. Cannot initialize Remote Config.");
                return;
            }

            if (!_config.enableFirebaseRemoteConfig)
            {
                Debug.Log("[RemoteConfigService] ⚙️ Firebase Remote Config disabled in SDKConfig.");
                return;
            }

            _configKey = _config.selectedRemoteGroup;
            if (string.IsNullOrEmpty(_configKey))
                _configKey = "DefaultGroup";

            var eventService = ServiceLocator.Get<IEventService>();
            eventService.Subscribe<ShiroginEvents.Firebase.FirebaseReadyEvent>(OnFirebaseReady);

            Debug.Log($"[RemoteConfigService] ✅ Initialized. Waiting for Firebase. Target Group: '{_configKey}'");
        }

        protected override void OnDispose()
        {
            var eventService = ServiceLocator.Get<IEventService>();
            eventService.Unsubscribe<ShiroginEvents.Firebase.FirebaseReadyEvent>(OnFirebaseReady);
        }

        // ---------------------------------------------------------
        // Firebase Ready
        // ---------------------------------------------------------
        private void OnFirebaseReady(ShiroginEvents.Firebase.FirebaseReadyEvent _)
        {
            if (!_config.enableFirebaseRemoteConfig)
            {
                Debug.Log("[RemoteConfigService] ⚙️ Firebase Remote Config disabled — skipping fetch.");
                return;
            }

            _initialized = true;
            Debug.Log($"[RemoteConfigService] 🔥 Firebase ready, fetching key '{_configKey}'...");
            CoroutineRunner.Start(DelayedStart());
        }

        private IEnumerator DelayedStart()
        {
            yield return new WaitForSeconds(1f);
            TryFetch();
        }

        // ---------------------------------------------------------
        // Fetch Logic
        // ---------------------------------------------------------
        private void TryFetch()
        {
            var dataService = ServiceLocator.Get<IDataService>();
            var data = dataService?.Get<RemoteConfigData>();
            if (data == null)
            {
                Debug.LogError("[RemoteConfigService] ❌ RemoteConfigData not found in DataService!");
                return;
            }

            if (!data.ShouldFetchNewData())
            {
                Debug.Log("[RemoteConfigService] 🕓 Using cached Remote Config data (less than 24h old).");
                TriggerEvent(data.CachedJson);
                return;
            }

            CoroutineRunner.Start(FetchAndCacheRoutine());
        }

        public void Initialize(string selectedGroup)
        {
            throw new NotImplementedException();
        }

        private IEnumerator FetchAndCacheRoutine()
        {
            if (!_initialized)
            {
                Debug.LogWarning("[RemoteConfigService] ⚠️ Firebase not initialized yet.");
                yield break;
            }

            Debug.Log($"[RemoteConfigService] 🔄 Fetching Remote Config key '{_configKey}'...");
var fetchTask = FirebaseRemoteConfig.DefaultInstance.FetchAsync(TimeSpan.Zero);
            var start = Time.realtimeSinceStartup;
            const float TIMEOUT = 10f;

            while (!fetchTask.IsCompleted && Time.realtimeSinceStartup - start < TIMEOUT)
                yield return null;

            if (!fetchTask.IsCompleted)
            {
                Debug.LogWarning("[RemoteConfigService] ⚠️ Fetch timeout. Using cached data.");
                TriggerEvent(ServiceLocator.Get<IDataService>()?.Get<RemoteConfigData>()?.CachedJson ?? "{}");
                yield break;
            }

            if (fetchTask.IsFaulted)
            {
                Debug.LogError(
                    $"[RemoteConfigService] ❌ Fetch error: {fetchTask.Exception?.GetBaseException().Message}");
                TriggerEvent(ServiceLocator.Get<IDataService>()?.Get<RemoteConfigData>()?.CachedJson ?? "{}");
                yield break;
            }

            var activateTask = FirebaseRemoteConfig.DefaultInstance.ActivateAsync();
            while (!activateTask.IsCompleted) yield return null;

            ExtractAndCacheValues();
            Debug.Log("RemoteConfig Service Dummy");
        }

        // ---------------------------------------------------------
        // Extract + Cache + Reload
        // ---------------------------------------------------------
        private void ExtractAndCacheValues()
        {
try
            {
                var rawJson = FirebaseRemoteConfig.DefaultInstance.GetValue(_configKey).StringValue;

                if (string.IsNullOrEmpty(rawJson))
                {
                    Debug.LogWarning($"[RemoteConfigService] ⚠️ RemoteConfig key '{_configKey}' returned empty JSON.");
                    return;
                }

                var dataService = ServiceLocator.Get<IDataService>();
                var data = dataService?.Get<RemoteConfigData>();
                if (data == null)
                {
                    Debug.LogError("[RemoteConfigService] ❌ RemoteConfigData not found in DataService!");
                    return;
                }

                if (data.CachedJson == rawJson)
                {
                    Debug.Log("[RemoteConfigService] 🔁 No changes detected. Cached data is up-to-date.");
                    return;
                }

                data.UpdateCache(rawJson);

                try
                {
                    data.Load();
                    data.Initialize();
                    Debug.Log("[RemoteConfigService] 🔁 RemoteConfigData re-initialized with latest Firebase values.");
                }
                catch (Exception reinitEx)
                {
                    Debug.LogError($"[RemoteConfigService] ❌ RemoteConfigData re-init failed: {reinitEx.Message}");
                }

                TriggerEvent(rawJson);
                Debug.Log($"[RemoteConfigService] ✅ Remote Config key '{_configKey}' updated and applied.");
            }
            catch (Exception ex)
            {
                Debug.LogError($"[RemoteConfigService] ❌ ExtractAndCacheValues failed: {ex.Message}");
            }
        }

        // ---------------------------------------------------------
        // Event Dispatch
        // ---------------------------------------------------------
        private void TriggerEvent(string json)
        {
            try
            {
                var eventService = ServiceLocator.Get<IEventService>();
                eventService.Invoke(
                    new ShiroginEvents.RemoteConfig.RemoteConfigUpdatedEvent(json, new Dictionary<string, string>()));
            }
            catch (Exception ex)
            {
                Debug.LogError($"[RemoteConfigService] ⚠️ RemoteConfigUpdatedEvent failed: {ex.Message}");
            }
        }

        private bool TryGetValue(string key, out string value)
        {
            value = string.Empty;
            var json = CachedJson;
            if (string.IsNullOrEmpty(json) || string.IsNullOrEmpty(key))
                return false;

            key = $"\"{key}\"";
            var index = json.IndexOf(key, StringComparison.Ordinal);
            if (index == -1) return false;

            var colon = json.IndexOf(':', index);
            if (colon == -1) return false;

            var comma = json.IndexOf(',', colon);
            var end = comma == -1 ? json.IndexOf('}', colon) : comma;
            if (end == -1) end = json.Length - 1;

            var raw = json.Substring(colon + 1, end - colon - 1).Trim().Trim('"');
            value = raw;
            return true;
        }
    }
#else
    /// <summary>
    ///     Fetches and caches Firebase Remote Config data for ShiroginSDK.
    ///     Automatically reads selected group and enable flags from SDKConfig.
    /// </summary>
    public class RemoteConfigService : ServiceBase, IRemoteConfigService
    {
        private ShiroginConfig _config;
        private string _configKey;
        private bool _initialized;

        // ---------------------------------------------------------
        // Value Accessors
        // ---------------------------------------------------------
        private string CachedJson
        {
            get
            {
                var dataService = ServiceLocator.Get<IDataService>();
                return dataService?.Get<RemoteConfigData>()?.CachedJson ?? "{}";
            }
        }

        public void ForceRefresh()
        {
            CoroutineRunner.Start(FetchAndCacheRoutine());
        }

        public int GetInt(string key, int defaultValue = 0)
        {
            if (TryGetValue(key, out var raw) && int.TryParse(raw, out var val))
                return val;
            return defaultValue;
        }

        public float GetFloat(string key, float defaultValue = 0f)
        {
            if (TryGetValue(key, out var raw) && float.TryParse(raw, out var val))
                return val;
            return defaultValue;
        }

        public bool GetBool(string key, bool defaultValue = false)
        {
            if (TryGetValue(key, out var raw))
                return raw.Equals("true", StringComparison.OrdinalIgnoreCase);
            return defaultValue;
        }

        public string GetString(string key, string defaultValue = "")
        {
            if (TryGetValue(key, out var raw))
                return raw;
            return defaultValue;
        }

        // ---------------------------------------------------------
        // Lifecycle
        // ---------------------------------------------------------
        protected override void OnInitialize()
        {
            _config = ShiroginConfig.Load();

            if (_config == null)
            {
                Debug.LogError("[RemoteConfigService] ❌ SDKConfig not found. Cannot initialize Remote Config.");
                return;
            }

            _configKey = _config.selectedRemoteGroup;
            if (string.IsNullOrEmpty(_configKey))
                _configKey = "DefaultGroup";

            var eventService = ServiceLocator.Get<IEventService>();
            eventService.Subscribe<ShiroginEvents.Firebase.FirebaseReadyEvent>(OnFirebaseReady);

            Debug.Log($"[RemoteConfigService] Dummy Initialized. Waiting for Firebase. Target Group: '{_configKey}'");
        }

        protected override void OnDispose()
        {
            var eventService = ServiceLocator.Get<IEventService>();
            eventService.Unsubscribe<ShiroginEvents.Firebase.FirebaseReadyEvent>(OnFirebaseReady);
        }

        // ---------------------------------------------------------
        // Firebase Ready
        // ---------------------------------------------------------
        private void OnFirebaseReady(ShiroginEvents.Firebase.FirebaseReadyEvent _)
        {
            
            _initialized = true;
            Debug.Log($"[RemoteConfigService] Dummy Firebase ready, fetching key '{_configKey}'...");
            CoroutineRunner.Start(DelayedStart());
        }

        private IEnumerator DelayedStart()
        {
            yield return new WaitForSeconds(1f);
            TryFetch();
        }

        // ---------------------------------------------------------
        // Fetch Logic
        // ---------------------------------------------------------
        private void TryFetch()
        {
            var dataService = ServiceLocator.Get<IDataService>();
            var data = dataService?.Get<RemoteConfigData>();
            if (data == null)
            {
                Debug.LogError("[RemoteConfigService] ❌ RemoteConfigData not found in DataService!");
                return;
            }

            if (!data.ShouldFetchNewData())
            {
                Debug.Log("[RemoteConfigService] 🕓 Using cached Remote Config data (less than 24h old).");
                TriggerEvent(data.CachedJson);
                return;
            }

            CoroutineRunner.Start(FetchAndCacheRoutine());
        }

        public void Initialize(string selectedGroup)
        {
            throw new NotImplementedException();
        }

        private IEnumerator FetchAndCacheRoutine()
        {
            if (!_initialized)
            {
                Debug.LogWarning("[RemoteConfigService] ⚠️ Firebase not initialized yet.");
                yield break;
            }
            Debug.Log("RemoteConfigService Dummy FetchAndCacheRoutine");
            ExtractAndCacheValues();
            Debug.Log("RemoteConfig Service Dummy");
        }

        // ---------------------------------------------------------
        // Extract + Cache + Reload
        // ---------------------------------------------------------
        private void ExtractAndCacheValues()
        {
            Debug.Log("RemoteConfigService Dummy ExtractAndCacheValues");
            
        }

        // ---------------------------------------------------------
        // Event Dispatch
        // ---------------------------------------------------------
        private void TriggerEvent(string json)
        {
            try
            {
                var eventService = ServiceLocator.Get<IEventService>();
                eventService.Invoke(
                    new ShiroginEvents.RemoteConfig.RemoteConfigUpdatedEvent(json, new Dictionary<string, string>()));
            }
            catch (Exception ex)
            {
                Debug.LogError($"[RemoteConfigService] ⚠️ RemoteConfigUpdatedEvent failed: {ex.Message}");
            }
        }

        private bool TryGetValue(string key, out string value)
        {
            value = string.Empty;
            var json = CachedJson;
            if (string.IsNullOrEmpty(json) || string.IsNullOrEmpty(key))
                return false;

            key = $"\"{key}\"";
            var index = json.IndexOf(key, StringComparison.Ordinal);
            if (index == -1) return false;

            var colon = json.IndexOf(':', index);
            if (colon == -1) return false;

            var comma = json.IndexOf(',', colon);
            var end = comma == -1 ? json.IndexOf('}', colon) : comma;
            if (end == -1) end = json.Length - 1;

            var raw = json.Substring(colon + 1, end - colon - 1).Trim().Trim('"');
            value = raw;
            return true;
        }
    }
#endif
}