using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using UnityEngine;

namespace Stary.Evo
{
    /// <summary>
    /// 自定义PlayerPrefs实现，数据存储在项目根目录的PlayerPrefs.ini文件中
    /// </summary>
    public static class CustomPlayerPrefs
    {
        private const string FileName = "PlayerPrefs.ini";
        private static string FilePath => Path.Combine(Application.persistentDataPath, FileName);

        // 缓存的数据
        private static Dictionary<string, object> _dataCache;
        private static bool _isDataLoaded;

        /// <summary>
        /// 设置字符串值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="value">值</param>
        public static void SetString(string key, string value)
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                PlayerPrefs.SetString(key, value);
                PlayerPrefs.Save();
            }
            else
            {
                LoadData();
                _dataCache[key] = value;
                SaveData();
            }
        }

        /// <summary>
        /// 获取字符串值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns>值</returns>
        public static string GetString(string key, string defaultValue = "")
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                return PlayerPrefs.GetString(key, defaultValue);
            }
            else
            {
                LoadData();
                _dataCache.TryGetValue(key, out var value);
                return value is string ? (string)value : defaultValue;
            }
        }

        /// <summary>
        /// 设置整数值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="value">值</param>
        public static void SetInt(string key, int value)
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                PlayerPrefs.SetInt(key, value);
                PlayerPrefs.Save();
            }
            else
            {
                LoadData();
                _dataCache[key] = value;
                SaveData();
            }
        }

        /// <summary>
        /// 获取整数值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns>值</returns>
        public static int GetInt(string key, int defaultValue = 0)
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                return PlayerPrefs.GetInt(key, defaultValue);
            }
            else
            {
                LoadData();
                return _dataCache.TryGetValue(key, out var value) ? (int)value : defaultValue;
            }
        }

        /// <summary>
        /// 设置浮点数值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="value">值</param>
        public static void SetFloat(string key, float value)
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                PlayerPrefs.SetFloat(key, value);
                PlayerPrefs.Save();
            }
            else
            {
                LoadData();
                _dataCache[key] = value;
                SaveData();
            }
        }

        /// <summary>
        /// 获取浮点数值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns>值</returns>
        public static float GetFloat(string key, float defaultValue = 0.0f)
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                return PlayerPrefs.GetFloat(key, defaultValue);
            }
            else
            {
                LoadData();
                return _dataCache.TryGetValue(key, out var value) ? (float)value : defaultValue;
            }
        }

        /// <summary>
        /// 设置布尔值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="value">值</param>
        public static void SetBool(string key, bool value)
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                PlayerPrefs.SetInt(key, value ? 1 : 0);
                PlayerPrefs.Save();
            }
            else
            {
                LoadData();
                _dataCache[key] = value;
                SaveData();
            }
        }

        /// <summary>
        /// 获取布尔值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns>值</returns>
        public static bool GetBool(string key, bool defaultValue = false)
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                return PlayerPrefs.GetInt(key, defaultValue ? 1 : 0) == 1;
            }
            else
            {
                LoadData();
                return _dataCache.TryGetValue(key, out var value) ? (bool)value : defaultValue;
            }
        }

        /// <summary>
        /// 检查是否存在指定的键
        /// </summary>
        /// <param name="key">键</param>
        /// <returns>是否存在</returns>
        public static bool HasKey(string key)
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                return PlayerPrefs.HasKey(key);
            }
            else
            {
                LoadData();
                return _dataCache.ContainsKey(key);
            }
        }

        /// <summary>
        /// 删除指定的键
        /// </summary>
        /// <param name="key">键</param>
        public static void DeleteKey(string key)
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                PlayerPrefs.DeleteKey(key);
                PlayerPrefs.Save();
            }
            else
            {
                LoadData();
                if (_dataCache.Remove(key))
                {
                    SaveData();
                }
            }
        }

        /// <summary>
        /// 清除所有数据
        /// </summary>
        public static void DeleteAll()
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                PlayerPrefs.DeleteAll();
                PlayerPrefs.Save();
            }
            else
            {
                _dataCache.Clear();
                SaveData();
            }
        }

        /// <summary>
        /// 获取所有键
        /// </summary>
        /// <returns>键列表</returns>
        public static string[] GetAllKeys()
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                // WebGL平台无法直接获取所有键，这里返回空数组
                // 注意：实际项目中可能需要维护一个键的列表
                return new string[0];
            }
            else
            {
                LoadData();
                return _dataCache.Keys.ToArray();
            }
        }

        /// <summary>
        /// 获取所有键值对
        /// </summary>
        /// <returns>键值对字典</returns>
        public static Dictionary<string, object> GetAll()
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                // WebGL平台无法直接获取所有键值对，这里返回空字典
                // 注意：实际项目中可能需要维护一个键值对的字典
                return new Dictionary<string, object>();
            }
            else
            {
                LoadData();
                return new Dictionary<string, object>(_dataCache);
            }
        }

        /// <summary>
        /// 从文件加载数据
        /// </summary>
        private static void LoadData()
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                // WebGL平台使用PlayerPrefs，不需要从文件加载
                return;
            }

            if (_isDataLoaded && _dataCache != null)
                return;

            _dataCache = new Dictionary<string, object>();

            if (!File.Exists(FilePath))
            {
                _isDataLoaded = true;
                return;
            }

            try
            {
                var lines = File.ReadAllLines(FilePath);
                foreach (var line in lines)
                {
                    if (string.IsNullOrWhiteSpace(line) || line.StartsWith("#"))
                        continue;

                    var parts = line.Split(new[] { '=' }, 2);
                    if (parts.Length != 2)
                        continue;

                    var key = parts[0].Trim();
                    var valueStr = parts[1].Trim();

                    // 尝试解析不同类型的值
                    if (bool.TryParse(valueStr, out var boolValue))
                    {
                        _dataCache[key] = boolValue;
                    }
                    else if (int.TryParse(valueStr, out var intValue))
                    {
                        _dataCache[key] = intValue;
                    }
                    else if (float.TryParse(valueStr, out var floatValue))
                    {
                        _dataCache[key] = floatValue;
                    }
                    else
                    {
                        // 字符串类型
                        _dataCache[key] = valueStr;
                    }
                }
            }
            catch (Exception e)
            {
                Debug.LogError($"加载CustomPlayerPrefs数据失败: {e.Message}");
                _dataCache = new Dictionary<string, object>();
            }

            _isDataLoaded = true;
        }

        /// <summary>
        /// 保存数据到文件
        /// </summary>
        private static void SaveData()
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                // WebGL平台使用PlayerPrefs，不需要保存到文件
                return;
            }

            if (_dataCache == null)
                return;

            try
            {
                var lines = new List<string>
                {
                    "# Custom Player Prefs Data",
                    $"# Last Modified: {DateTime.Now}",
                    ""
                };

                foreach (var kvp in _dataCache)
                {
                    var valueStr = kvp.Value.ToString();
                    lines.Add($"{kvp.Key}={valueStr}");
                }

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

                File.WriteAllLines(FilePath, lines);
            }
            catch (Exception e)
            {
                Debug.LogError($"保存CustomPlayerPrefs数据失败: {e.Message}");
            }
        }

        /// <summary>
        /// 手动刷新数据（重新从文件加载）
        /// </summary>
        public static void Refresh()
        {
            if (Application.platform == RuntimePlatform.WebGLPlayer)
            {
                // WebGL平台使用PlayerPrefs，不需要刷新
                return;
            }

            _isDataLoaded = false;
            LoadData();
        }
    }
}