using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using Newtonsoft.Json;
using MotionFramework;

namespace Zion.ERP.Inventory
{
    /// <summary>
    /// API配置管理器，负责统一管理API接口配置
    /// </summary>
    public class ApiConfigManager : ModuleSingleton<ApiConfigManager>, IModule
    {
        /// <summary>
        /// 当前配置数据
        /// </summary>
        private ApiConfigData _currentConfig;

        /// <summary>
        /// ScriptableObject配置（已废弃）
        /// </summary>
        private ApiConfig _scriptableConfig = null;

        /// <summary>
        /// JSON配置文件路径
        /// </summary>
        private string _jsonConfigPath;

        /// <summary>
        /// 配置文件最后修改时间
        /// </summary>
        private DateTime _lastConfigModifyTime;

        /// <summary>
        /// 是否启用热重载
        /// </summary>
        private bool _enableHotReload = false;

        /// <summary>
        /// 热重载检查间隔
        /// </summary>
        private float _hotReloadInterval = 30f;

        /// <summary>
        /// 上次热重载检查时间
        /// </summary>
        private float _lastHotReloadCheck = 0f;

        /// <summary>
        /// 配置加载完成事件
        /// </summary>
        public event Action<ApiConfigData> OnConfigLoaded;

        /// <summary>
        /// 配置重载事件
        /// </summary>
        public event Action<ApiConfigData> OnConfigReloaded;

        /// <summary>
        /// 配置错误事件
        /// </summary>
        public event Action<string> OnConfigError;

        /// <summary>
        /// 获取当前配置
        /// </summary>
        public ApiConfigData CurrentConfig => _currentConfig;

        /// <summary>
        /// 获取ScriptableObject配置（已废弃）
        /// </summary>
        public ApiConfig ScriptableConfig => null;

        /// <summary>
        /// 是否已初始化
        /// </summary>
        public bool IsInitialized { get; private set; } = false;

        /// <summary>
        /// 模块创建时调用
        /// </summary>
        public void OnCreate(object createParam)
        {
            Debug.Log("API配置管理器创建成功");
        }

        /// <summary>
        /// 初始化配置管理器
        /// </summary>
        /// <param name="enableHotReload">是否启用热重载</param>
        /// <param name="hotReloadInterval">热重载检查间隔</param>
        public void Initialize(bool enableHotReload = false, float hotReloadInterval = 30f)
        {
            Debug.Log("开始初始化API配置管理器");

            _enableHotReload = enableHotReload;
            _hotReloadInterval = hotReloadInterval;

            // 设置JSON配置文件路径
            _jsonConfigPath = Path.Combine(Application.streamingAssetsPath, "DataConfig", "api_config.json");

            // 加载配置
            LoadConfig();

            IsInitialized = true;
            Debug.Log("API配置管理器初始化完成");
        }

        /// <summary>
        /// 加载配置
        /// </summary>
        public void LoadConfig()
        {
            try
            {
                // 只从JSON文件加载配置
                if (File.Exists(_jsonConfigPath))
                {
                    LoadFromJson();
                }
                else
                {
                    Debug.LogError($"API配置文件不存在：{_jsonConfigPath}");
                    OnConfigError?.Invoke($"API配置文件不存在：{_jsonConfigPath}");
                    return;
                }

                // 验证配置
                if (_currentConfig == null || !_currentConfig.Validate())
                {
                    Debug.LogError("API配置验证失败");
                    OnConfigError?.Invoke("API配置验证失败");
                    return;
                }

                // 记录配置文件修改时间
                _lastConfigModifyTime = File.GetLastWriteTime(_jsonConfigPath);

                Debug.Log($"API配置加载成功，当前环境：{_currentConfig.CurrentEnvironment}");
                OnConfigLoaded?.Invoke(_currentConfig);
            }
            catch (Exception ex)
            {
                Debug.LogError($"加载API配置失败：{ex.Message}");
                OnConfigError?.Invoke($"加载API配置失败：{ex.Message}");
            }
        }

        /// <summary>
        /// 从JSON文件加载配置
        /// </summary>
        private void LoadFromJson()
        {
            Debug.Log($"从JSON文件加载配置：{_jsonConfigPath}");
            string jsonContent = File.ReadAllText(_jsonConfigPath);
            _currentConfig = JsonConvert.DeserializeObject<ApiConfigData>(jsonContent);
            Debug.Log("JSON配置文件加载成功");
        }

    
        /// <summary>
        /// 创建默认配置
        /// </summary>
        private void CreateDefaultConfig()
        {
            Debug.LogError("未找到API配置文件，请确保配置文件存在：api_config.json");
            _currentConfig = null;
        }

        /// <summary>
        /// 保存配置到JSON文件
        /// </summary>
        public void SaveConfigToJson()
        {
            try
            {
                if (_currentConfig == null)
                {
                    Debug.LogError("没有可保存的配置数据");
                    return;
                }

                // 确保目录存在
                string directory = Path.GetDirectoryName(_jsonConfigPath);
                if (!Directory.Exists(directory))
                {
                    Directory.CreateDirectory(directory);
                }

                // 序列化并保存
                string jsonContent = JsonConvert.SerializeObject(_currentConfig, Formatting.Indented);
                File.WriteAllText(_jsonConfigPath, jsonContent);

                Debug.Log($"API配置已保存到：{_jsonConfigPath}");
            }
            catch (Exception ex)
            {
                Debug.LogError($"保存API配置失败：{ex.Message}");
                OnConfigError?.Invoke($"保存API配置失败：{ex.Message}");
            }
        }

        /// <summary>
        /// 获取API接口URL
        /// </summary>
        /// <param name="endpointName">接口名称</param>
        /// <param name="dynamicParams">动态参数</param>
        /// <returns>完整的URL</returns>
        public string GetApiUrl(string endpointName, Dictionary<string, string> dynamicParams = null)
        {
            if (_currentConfig == null)
            {
                Debug.LogError("API配置未初始化");
                return "";
            }

            var endpoint = _currentConfig.GetEndpoint(endpointName);
            if (endpoint == null)
            {
                Debug.LogError($"未找到API接口配置：{endpointName}");
                return "";
            }

            var envConfig = _currentConfig.GetCurrentEnvironmentConfig();
            if (envConfig == null)
            {
                Debug.LogError("未找到当前环境配置");
                return "";
            }

            return endpoint.GetFullUrl(envConfig.BaseUrl, dynamicParams);
        }

        /// <summary>
        /// 获取API接口配置
        /// </summary>
        /// <param name="endpointName">接口名称</param>
        /// <returns>API接口配置</returns>
        public ApiEndpoint GetEndpoint(string endpointName)
        {
            return _currentConfig?.GetEndpoint(endpointName);
        }

        /// <summary>
        /// 获取当前环境配置
        /// </summary>
        /// <returns>当前环境配置</returns>
        public ApiEnvironmentConfig GetCurrentEnvironmentConfig()
        {
            return _currentConfig?.GetCurrentEnvironmentConfig();
        }

        /// <summary>
        /// 切换环境
        /// </summary>
        /// <param name="environment">目标环境</param>
        public void SwitchEnvironment(ApiEnvironment environment)
        {
            if (_currentConfig == null)
            {
                Debug.LogError("API配置未初始化");
                return;
            }

            var envConfig = _currentConfig.Environments.Find(e => e.Environment == environment);
            if (envConfig == null)
            {
                Debug.LogError($"未找到环境配置：{environment}");
                return;
            }

            if (!envConfig.IsEnabled)
            {
                Debug.LogWarning($"环境 {environment} 未启用");
                return;
            }

            _currentConfig.CurrentEnvironment = environment;
            Debug.Log($"已切换到环境：{environment}");

            // 保存配置
            SaveConfigToJson();
        }

        /// <summary>
        /// 检查配置是否需要重载
        /// </summary>
        private void CheckConfigReload()
        {
            if (!_enableHotReload || !File.Exists(_jsonConfigPath))
                return;

            try
            {
                DateTime currentModifyTime = File.GetLastWriteTime(_jsonConfigPath);
                if (currentModifyTime > _lastConfigModifyTime)
                {
                    Debug.Log("检测到配置文件变更，开始重载配置");
                    LoadConfig();
                    OnConfigReloaded?.Invoke(_currentConfig);
                }
            }
            catch (Exception ex)
            {
                Debug.LogError($"检查配置重载时发生错误：{ex.Message}");
            }
        }

        /// <summary>
        /// 模块更新时调用
        /// </summary>
        public void OnUpdate()
        {
            // 检查热重载
            if (_enableHotReload && Time.time - _lastHotReloadCheck > _hotReloadInterval)
            {
                _lastHotReloadCheck = Time.time;
                CheckConfigReload();
            }
        }

        /// <summary>
        /// 模块销毁时调用
        /// </summary>
        public void OnDestroy()
        {
            Debug.Log("API配置管理器销毁");
        }

        /// <summary>
        /// 模块GUI绘制时调用
        /// </summary>
        public void OnGUI()
        {
            // 可以在这里添加调试信息显示
        }
    }
}