using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Runtime.InteropServices;
using System.IO;
using System.Text;
using System;

namespace GeneralTools
{
    public class IniFile
    {
        protected static Dictionary<string, Dictionary<string, Dictionary<string, string>>> dataDict = new Dictionary<string, Dictionary<string, Dictionary<string, string>>>();
        public static string ReadIniData(string Section, string Key, string NoText, string iniFilePath)
        {
            return Read(Section, Key, NoText, iniFilePath);
        }
        public static bool WriteIniData(string Section, string Key, string Value, string iniFilePath)
        {
            return Write(Section, Key, Value, iniFilePath);
        }
        public static void ClearCache(string iniFilePath)
        {
            if (string.IsNullOrWhiteSpace(iniFilePath))
            {
                return;
            }

            dataDict.Remove(iniFilePath);

            try
            {
                dataDict.Remove(Path.GetFullPath(iniFilePath));
            }
            catch (Exception)
            {
                // 忽略路径规范化失败，原始键已尝试清理。
            }
        }
        public static T GetTypeValue<T>(string section, string key, T defultValue, string iniFilePath) where T : IComparable
        {
            string s = ReadIniData(section, key, "", iniFilePath);
            object obj;
            try
            {
                obj = (T)Convert.ChangeType(s, typeof(T));
            }
            catch (Exception)
            {
                obj = defultValue;
            }
            return (T)obj;
        }
#if UNITY_STANDALONE_WIN
        [DllImport("kernel32", CharSet = CharSet.Auto)]
        private static extern long GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
        [DllImport("kernel32", CharSet = CharSet.Auto)]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
        public static string Read(string Section, string Key, string NoText, string iniFilePath)
        {
            if (File.Exists(iniFilePath))
            {
                StringBuilder temp = new StringBuilder(1024);
                GetPrivateProfileString(Section, Key, NoText, temp, 1024, iniFilePath);
                return temp.ToString();
            }
            else
            {
                return string.Empty;
            }
        }
        public static bool Write(string Section, string Key, string Value, string iniFilePath)
        {
            if (!File.Exists(iniFilePath))
            {
                using (File.Create(iniFilePath)) { }
            }
            long OpStation = WritePrivateProfileString(Section, Key, Value, iniFilePath);
            return OpStation != 0;
        }
#else
        private static string Read(string Section, string Key, string NoText, string iniFilePath)
        {
            iniFilePath = Path.GetFullPath(iniFilePath);
            if (File.Exists(iniFilePath))
            {
                return GetValue(Section, Key, NoText, iniFilePath);
            }
            else
            {
                return NoText;
            }
        }
        private static bool Write(string Section, string Key, string Value, string iniFilePath)
        {
            iniFilePath = Path.GetFullPath(iniFilePath);
            if (!File.Exists(iniFilePath))
            {
                using (File.Create(iniFilePath)) { }
            }
            SetValue(Section, Key, Value, iniFilePath);
            WriteIni(iniFilePath);
            dataDict[iniFilePath] = ReadIniFile(iniFilePath);
            return true;
        }
#endif


        private static string GetValue(string Section, string Key, string NoText, string iniFilePath)
        {
            if (!dataDict.ContainsKey(iniFilePath))
            {
                dataDict[iniFilePath] = ReadIniFile(iniFilePath);
            }
            if (!dataDict[iniFilePath].ContainsKey(Section))
            {
                return NoText;
            }
            else if (!dataDict[iniFilePath][Section].ContainsKey(Key))
            {
                return NoText;
            }
            return dataDict[iniFilePath][Section][Key];
        }

        private static Dictionary<string, Dictionary<string, string>> SetValue(string Section, string Key, string Value, string iniFilePath)
        {
            Dictionary<string, Dictionary<string, string>> groupDict = new Dictionary<string, Dictionary<string, string>>();
            if (!dataDict.ContainsKey(iniFilePath))
            {
                dataDict[iniFilePath] = ReadIniFile(iniFilePath);
            }
            groupDict = dataDict[iniFilePath];
            if (!groupDict.ContainsKey(Section))
            {
                groupDict[Section] = new Dictionary<string, string>();
            }
            groupDict[Section][Key] = Value;
            return groupDict;
        }
        private static void WriteIni(string iniFilePath)
        {
            if (!dataDict.ContainsKey(iniFilePath))
                return;

            Dictionary<string, Dictionary<string, string>> groupDict = dataDict[iniFilePath];
            string waitWriteStr = "";
            foreach (var group in groupDict)
            {
                waitWriteStr += $"[{group.Key}]" + "\r\n";
                foreach (var kw in group.Value)
                {
                    waitWriteStr += $"{kw.Key}={kw.Value}" + "\r\n";
                }
            }
            File.WriteAllText(iniFilePath, waitWriteStr, Encoding.UTF8);
        }
        private static Dictionary<string, Dictionary<string, string>> ReadIniFile(string iniFilePath)
        {
            Dictionary<string, Dictionary<string, string>> groupDict = new Dictionary<string, Dictionary<string, string>>();

            string[] textArr = File.ReadAllLines(iniFilePath);
            string nowGroupName = "";
            for (int i = 0; i < textArr.Length; i++)
            {
                textArr[i] = textArr[i].Trim();
                if (textArr[i].StartsWith(";") || textArr[i].StartsWith("；") || textArr[i].StartsWith("#") || textArr[i].StartsWith("-") || textArr[i].StartsWith("！"))
                {
                    continue;
                }
                if (textArr[i].Contains("=") && groupDict.ContainsKey(nowGroupName))
                {
                    string[] kw = textArr[i].Split('=');
                    groupDict[nowGroupName][kw[0]] = kw[1];
                }
                else if (textArr[i].StartsWith("[") && textArr[i].EndsWith("]"))
                {
                    //表示是组
                    string groupName = textArr[i].TrimStart('[').TrimEnd(']');
                    nowGroupName = groupName;
                    groupDict[groupName] = new Dictionary<string, string>();
                }
            }

            return groupDict;
        }
    }
}