using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace YG.Lib
{
    public static class TextApiLib
    {
        #region API函数声明
        [DllImport("kernel32")]
        public static extern long WritePrivateProfileString(string section, string key, string val, string filePath);

        //需要调用GetPrivateProfileString的重载
        [DllImport("kernel32", EntryPoint = "GetPrivateProfileString")]
        public static extern long GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);


        [DllImport("kernel32", EntryPoint = "GetPrivateProfileString")]
        public static extern uint GetPrivateProfileStringA(string section, string key, string def, Byte[] retVal, int size, string filePath);

        /// <summary>
        ///在路径filepath中 在section下边查找key，如果没找到那么返回notfindvalue默认值，
        /// </summary>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="notfindvalue">没有找到的返回之</param>
        /// <param name="filePath"></param>
        /// <returns></returns>
        [DllImport("kernel32", EntryPoint = "GetPrivateProfileInt")]

        public static extern uint GetPrivateProfileInt(string section, string key, int notfindvalue, string filePath);
        /// <summary>
        /// 查找ini文件中所有的section
        /// </summary>
        /// <param name="section"></param>
        /// <param name="notfindvalue"></param>
        /// <param name="filePath"></param>
        /// <returns></returns>

        [DllImport("kernel32", EntryPoint = "GetPrivateProfileSectionNames")]

        private static extern int GetPrivateProfileSectionNames(byte[] sb, int notfindvalue, string filePath);

        /// <summary>
        /// 获取section下的所有的key
        /// </summary>
        /// <param name="lpAppName"></param>
        /// <param name="lpReturnedString"></param>
        /// <param name="nSize"></param>
        /// <param name="lpFileName"></param>
        /// <returns></returns>
        [DllImport("KERNEL32.DLL", EntryPoint = "GetPrivateProfileSection")]
        private static extern int GetPrivateProfileSection(string lpAppName, byte[] lpReturnedString, int nSize, string lpFileName);
        #endregion

        /// <summary>
        /// 获取文件下边所有的section
        /// </summary>
        /// <param name="filepath"></param>
        /// <returns></returns>
        public static List<string> GetPrivateProfileSectionNames(string filepath)
        {
            byte[] bt = new byte[1024 * 5];
            int sectionleng = GetPrivateProfileSectionNames(bt, 1024, filepath);
            string sectionnames = Encoding.ASCII.GetString(bt, 0, sectionleng);
            string[] vs = sectionnames.Split(new string[] { "\0" }, StringSplitOptions.None);
            return vs.Where(m => !string.IsNullOrEmpty(m)).ToList(); 
        }
        /// <summary>
        /// 获取selection下的所有的key
        /// </summary>
        /// <param name="selectname">[FT01]类似表头</param>
        /// <param name="lpFileName">脚本路径</param>
        /// <returns></returns>
        public static List<string> GetPrivateProfileSection(string selectname, string lpFileName)
        {
            byte[] bt = new byte[1024 * 5];
            int keyleng = GetPrivateProfileSection(selectname, bt, 1024, lpFileName);
            string keysvalue = Encoding.ASCII.GetString(bt, 0, keyleng);
            //keysvalue=keysvalue.Replace("\0", "\",\"").Replace("=", "\":\"");
            string[] vs = keysvalue.Split(new string[] { "\0" }, StringSplitOptions.None);
            return vs.Where(m=>!string.IsNullOrEmpty(m)&&!m.StartsWith("//")).ToList();
        }


    }
}