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

namespace INILoader
{
	using dicKeyList = Dictionary<String, String>;
	using dicTitleList = Dictionary<String, Dictionary<String, String>>;
	public class INILoader
	{
		[System.Runtime.InteropServices.DllImport("kernel32")]
		private static extern long WritePrivateProfileString(String section, String key, String value, String filepath);
		[System.Runtime.InteropServices.DllImport("kernel32")]
		private static extern long GetPrivateProfileString(String section, String key, String value, StringBuilder retValue, int size, String filepath);

		public String m_FileName;
		public String m_szTitle;

		dicTitleList m_TitleList = new dicTitleList();

		bool m_bSaveLog;
		StreamWriter m_Log;
		public INILoader()
		{
			m_FileName = "";
			m_szTitle = "";
		}

		~INILoader()
		{
		}

		public INILoader(String szFile, bool save_log)
		{
			if (!File.Exists(szFile))
				return;

			m_bSaveLog = save_log;
			if( m_bSaveLog )
			{
				
				String log_file = Path.GetFileName(szFile);
				m_Log = new StreamWriter( String.Format( "./{0}.log", log_file ), false, Encoding.Default );
			}

			m_FileName = szFile;
			m_szTitle = "";
			Parsing();
		}

		public void SetFileName( String szFile )
		{
			m_TitleList.Clear();
			m_FileName = szFile;
			m_szTitle = "";
			if (File.Exists(szFile))
			{
				Parsing();
			}
			else
			{
				WriteLog(String.Format("ini 파일이 없습니다 : [{0}]", szFile));
			}
		}

		public String GetFileName() { return m_FileName; }
		public void Parsing()
		{
			WriteLog("<<< -------------------- INI Load -------------------- >>>");
			String szLine = String.Empty;
			String szLastLine = String.Empty;

			StreamReader sr = new StreamReader(m_FileName, Encoding.Default);
			dicKeyList tempKeyList = new dicKeyList();
			while (sr.Peek() > -1)
			{
				if (szLastLine == String.Empty || szLastLine[0] != '[')
				{
					szLine = sr.ReadLine();
				}
				else
				{
					szLine = szLastLine;
					szLastLine = String.Empty;
				}

				szLine = szLine.Replace("\t", "");
				if (szLine == String.Empty)
				{
					continue;
				}

				if (szLine[0] != '[')
				{
					continue;
				}

				szLastLine = ParseTitle(szLine, ref sr);
			}

			sr.Close();
			WriteLog("<<< -------------------- INI Load Complete -------------------- >>>");
			if( m_bSaveLog )
				m_Log.Close();
		}

		private String ParseTitle(String szTitle, ref StreamReader sr)
		{
			String szLine = "";
			dicKeyList tempKeyList = new dicKeyList();
			while (sr.Peek() > -1)
			{
				szLine = sr.ReadLine();
				szLine = szLine.Replace("\t", "");
				if (szLine == String.Empty)
					continue;

				if (szLine[0] == ';')
					continue;

				if (szLine[0] == '[')
					break;

				ParseKey(szTitle, szLine, ref tempKeyList);
			}

			if (tempKeyList.Count > 0)
			{
				char[] charSeparators = new char[] { '[', ']' };
				String[] RetString = szTitle.Split(charSeparators);
				if( RetString.Length < 3 )
					WriteLog(String.Format("알수없는 오류 발생 : {0}", szTitle));

				dicKeyList retList;
				if (!m_TitleList.TryGetValue(RetString[1], out retList))
				{
					m_TitleList.Add(RetString[1], tempKeyList);
				}
				else
				{
					int iCnt = retList.Count;
					WriteLog(String.Format("중복섹션이 발생했습니다. : {0}", szTitle));
				}
			}

			return szLine;
		}

		private void ParseKey(String szTitle, String szLine, ref dicKeyList KeyList)
		{
			char[] charSeparators = new char[] { '=', '\t' };
			String[] szWord = szLine.Split(charSeparators, 2);
			if (szWord.Length > 1)
			{
				String szKey = szWord[0].Trim();
				String szValue = szWord[1].Trim();
				String RetValue;
				if (!KeyList.TryGetValue(szKey, out RetValue))
				{
					KeyList.Add(szKey, szValue);
				}
				else
				{
					//MessageBox.Show( "이미 있는 키입니다. - "+szKey);
					WriteLog(String.Format("중복키가 발생했습니다. : {0} {1}", szTitle, szKey));
				}
			}
		}

		public void SetTitle(String szSection)
		{
			m_szTitle = szSection;
		}

		public void WriteValue(String key, String value)
		{
			if (String.IsNullOrEmpty(m_FileName) || String.IsNullOrEmpty(m_szTitle))
				return;

			WritePrivateProfileString(m_szTitle, key, String.Format(" {0}", value), m_FileName);
		}

		public void WriteSection(String section, String key, String value)
		{
			WritePrivateProfileString(section, key, value, m_FileName);
		}

		public String GetValue(String key)
		{
			if (String.IsNullOrEmpty(m_szTitle))
				return String.Empty;

			String retValue = "";
			dicKeyList KeyList;
			try
			{
				if (m_TitleList.TryGetValue(m_szTitle, out KeyList))
				{
					if (KeyList.TryGetValue(key, out retValue))
						return retValue;
				}
			}
			catch /*(System.Exception e)*/
			{
				/*MessageBox.Show(e.Message);*/
			}

			return retValue;
		}

		public String LoadString(String key, String defVal)
		{
			String retVal = GetValue(key);
			if (String.IsNullOrEmpty(retVal))
				return defVal;

			return retVal.ToString();
		}

		public int LoadInt(String key, int defVal)
		{
			try
			{
				String retVal = GetValue(key);
				if (String.IsNullOrEmpty(retVal))
					return defVal;

				return Int32.Parse(retVal);
			}
			catch /*(System.Exception e)*/
			{
				/*String retVal = GetValue(key);
				MessageBox.Show( e.Message + "-" + key + retVal );*/
			}
			return defVal;
		}

		public uint LoadUint(String key, uint defVal)
		{
			try
			{
				String retVal = GetValue(key);
				if (String.IsNullOrEmpty(retVal))
					return defVal;

				return uint.Parse(retVal);
			}
			catch /*(System.Exception e)*/
			{
				/*String retVal = GetValue(key);
				MessageBox.Show( e.Message + "-" + key + retVal );*/
			}
			return defVal;
		}

		public float LoadFloat(String key, float defVal)
		{
			String retVal = GetValue(key);
			if (String.IsNullOrEmpty(retVal))
				return defVal;

			return float.Parse(retVal);
		}

		public bool LoadBool(String key, bool defVal)
		{
			try
			{
				String retVal = GetValue(key);
				if (String.IsNullOrEmpty(retVal))
					return defVal;

				if (int.Parse(retVal) == 0)
					return false;
				else
					return true;
			}
			catch /*(System.Exception e)*/
			{
				/*String retVal = GetValue(key);
				MessageBox.Show(e.Message + " - " + key + " = " + retVal);*/
			}
			return defVal;
		}

		private void WriteLog( String log )
		{
			if( !m_bSaveLog )
				return;

			if( m_Log != null )
			{
				m_Log.WriteLine( log );
			}
		}
	}
}