using System;
using System.Runtime.InteropServices;
using System.Text;

namespace NewPosInstaller
{
    /// <summary>
    /// Win32 Ini file read/write
    /// </summary>
    public class IniFile
    {
        // INI File Write
        [DllImport("kernel32")]
        private static extern int WritePrivateProfileString(string section, string key, string val, string filePath);

        // INI File Read
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string defVal, StringBuilder retVal, int size, string filePath);

        [DllImport("kernel32")]
        private static extern int GetPrivateProfileInt(string section, string key, int defVal, string filePath);

        #region public static string GetValue(string filePath, string section, string key, string defaultValue)
        /// <summary>
        /// Read Data(String) From the Ini File
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static string GetValue(string filePath, string section, string key, string defaultValue = "")
        {
            string retValue = string.Empty;

            try
            {
                StringBuilder sb = new StringBuilder(255);
                int ret = IniFile.GetPrivateProfileString(section, key, defaultValue, sb, sb.Capacity, filePath);
                if (ret != 0) retValue = sb.ToString().Trim();

                if (string.IsNullOrWhiteSpace(retValue)) retValue = defaultValue;
            }
            catch (Exception ex)
            {
                ComLog.WriteLog(ComLog.Level.Exception
                              , System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.Name + "."
                              + System.Reflection.MethodBase.GetCurrentMethod().Name + "()"
                              , ex.Message);
                retValue = string.Empty;
            }

            return retValue.Trim();
        }
        #endregion

        #region public static int GetValue(string filePath, string section, string key, int defaultValue)
        /// <summary>
        /// Read Data(Integer) From the Ini File
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static int GetValue(string filePath, string section, string key, int defaultValue)
        {
            string retValue = GetValue(filePath, section, key, defaultValue.ToString());
            double temp = 0;
            if (double.TryParse(retValue, out temp))
                return (int)temp;
            else
                return 0;
        }
        #endregion

        #region public static double GetValue(string filePath, string section, string key, double defaultValue)
        /// <summary>
        /// Read Data(Dobule) From the Ini File
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static double GetValue(string filePath, string section, string key, double defaultValue)
        {
            string retValue = GetValue(filePath, section, key, defaultValue.ToString());
            double temp = 0.0;
            if (double.TryParse(retValue, out temp))
                return temp;
            else
                return 0.0;
        }
        #endregion

        #region public static bool SetValue(string filePath, string section, string key, string value)
        /// <summary>
        /// Write Data to the INI File
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static bool SetValue(string filePath, string section, string key, string value)
        {
            bool retValue = false;

            try
            {
                int ret = IniFile.WritePrivateProfileString(section, key, value, filePath);

                retValue = true;
            }
            catch (Exception ex)
            {
                ComLog.WriteLog(ComLog.Level.Exception
                              , System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.Name + "."
                              + System.Reflection.MethodBase.GetCurrentMethod().Name + "()"
                              , ex.Message); 
                retValue = false;
            }

            return retValue;
        }
        #endregion
    }
}