using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection.Metadata;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using static System.Collections.Specialized.BitVector32;

namespace LB_SmartVision.Tool
{
    public class OperateIniHelper
    {
        private string _iniFilePath = "Config";

        /// <summary>
        /// IniFilePath需要包含.ini，在引用前需要设置FileName
        /// </summary>
        public string IniFilePath
        {
            get
            {
                return System.IO.Path.Combine(Application.StartupPath, _iniFilePath, _iniFileName);
            }
            set
            {
                _iniFilePath = value;
            }
        }

        private string _iniFileName = "Default.ini";

        public static string Suffix = ".ini";

        private bool bClosedIni = false;
        public string IniFileName
        {
            get
            {
                return _iniFileName;
            }
            set
            {
                int index = value.LastIndexOf('.');

                // 如果没有找到分隔符，则返回原始字符串
                if (index == -1)
                    _iniFileName = value + Suffix;
                else
                    _iniFileName = value.Substring(0, index) + Suffix;
            }
        }

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        private static extern int WritePrivateProfileString(string section, string key, string value, string filePath);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        private static extern int GetPrivateProfileString(string section, string key, string defaultValue, StringBuilder returnValue, int size, string filePath);

        public OperateIniHelper() { }

        public OperateIniHelper(string iniFileName = "MyAlgorithm_1", string iniFilePath = "MyAlgorithm")
        {
            IniFileName = iniFileName;
            IniFilePath = iniFilePath;
            GetValidFilePath(IniFilePath);
        }

        public void SetValue(string section, string key, object value, string path = "")
        {
            // 选择合适的编码
            Encoding encoding = Encoding.UTF8;
            if (path != "" && value != null)
            {
                WritePrivateProfileString(section.Trim(), key.Trim(), value.ToString(), path);
                int index = path.LastIndexOf('.');
                if (index != -1)
                {
                    string EncryptPath = path.Substring(0, index) + "_closed" + Suffix;
                    Tool.EncryptFile(path, EncryptPath);
                }
            }
            else if (value != null)
            {
                WritePrivateProfileString(section.Trim(), key.Trim(), value.ToString(), IniFilePath);
                int index = IniFilePath.LastIndexOf('.');
                if (index != -1)
                {
                    string EncryptPath = IniFilePath.Substring(0, index) + "_closed" + Suffix;
                    Tool.EncryptFile(IniFilePath, EncryptPath);
                }
            }
        }

        /// <summary>
        /// 获取Ini文件值
        /// </summary>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        public string GetValue(string section, string key, string path = "")
        {
            StringBuilder returnValue = new StringBuilder(255);

            if (path != "" && path != null && GetValidFilePath(path).Item1)
                GetPrivateProfileString(section.Trim(), key.Trim(), string.Empty, returnValue, returnValue.Capacity, path);

            else if (GetValidFilePath(IniFilePath).Item1)
                GetPrivateProfileString(section.Trim(), key.Trim(), string.Empty, returnValue, returnValue.Capacity, IniFilePath);

            //不存在值时写入默认值0
            if (string.IsNullOrEmpty(returnValue.ToString().Trim()))
            {
                string strDefalut = "0";
                if (path != "" && path != null)
                    SetValue(section.Trim(), key.Trim(), strDefalut, path);
                else
                    SetValue(section.Trim(), key.Trim(), strDefalut);

                return strDefalut;
            }

            return returnValue.ToString();
        }

        static (bool, string) GetValidFilePath(string path)
        {
            try
            {
                if (path == "" || path == null)
                    return (false, null);

                // 检查路径是否包含非法字符
                string fullPath = Path.GetFullPath(path);
                bool result = !string.IsNullOrWhiteSpace(fullPath) && path.Equals(fullPath, StringComparison.OrdinalIgnoreCase);

                // 不存在非法字符则判断是否需要创建
                if (result)
                {
                    string parentPath = Path.GetDirectoryName(path);
                    // 判断文件夹是否存在
                    if (!Directory.Exists(parentPath) && parentPath != null)
                    {
                        try
                        {
                            Directory.CreateDirectory(parentPath);
                            // 文件不存在则写入默认值
                        }
                        catch { return (false, null); }
                    }

                }
                return (result, path);
            }
            catch { return (false, null); }
        }
    }
}