using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;

namespace AIAHTML5.API.Models
{
    public class IPValidator
    {
        public static Double ChangeIpToDouble(String ipVal)
        {
            String[] resultArray = new String[20];
            //Array resultArray ;
            String n = ipVal;
            String[] array = n.Split('.');
            for (int i = 0; i < array.Length; i++)
            {
                if (array[i].Length == 1)
                {
                    array[i] = "00" + array[i];
                    resultArray[i] = (array[i]);
                }
                else if (array[i].Length == 2)
                {
                    array[i] = "0" + array[i];
                    resultArray[i] = (array[i]);
                }
                else
                {
                    array[i] = array[i];
                    resultArray[i] = (array[i]);
                }
            }

            //String theContent = resultArray.ToString();
            String theContent = "";

            for (int i = 0; i <= resultArray.Length - 1; i++)
            {
                if (!String.IsNullOrEmpty(resultArray[i]))
                    theContent += resultArray[i];
            }
            theContent = (theContent == "" ? "0" : theContent);

            return Convert.ToDouble(theContent);
            //return theContent;
        }


        public static bool ValidateIP(String strSiteIp, String strSiteIPTo, String strSiteMasterIPTo, String strIPToValidate, int intIsMaster)
        {
            Double dblSiteIP = 0;
            Double dblSiteIPTo = 0;
            Double dblSiteMIPTo = 0;
            Double dblIPToValidate = 0;
            bool boolReturn = false;

            try
            {
                // Convert all IP to double values
                dblSiteIP = ChangeIpToDouble(((strSiteIp == "" || IsNumericIP(strSiteIp) == false) ? "0" : strSiteIp));
                dblSiteIPTo = ChangeIpToDouble(((strSiteIPTo == "" || IsNumericIP(strSiteIPTo) == false) ? "0" : strSiteIPTo));
                dblSiteMIPTo = ChangeIpToDouble(((strSiteMasterIPTo == "" || IsNumericIP(strSiteMasterIPTo) == false) ? "0" : strSiteMasterIPTo));
                dblIPToValidate = ChangeIpToDouble(((strIPToValidate == "" || IsNumericIP(strIPToValidate) == false) ? "0" : strIPToValidate));

                if (intIsMaster > 0)
                {
                    if (dblSiteIP == dblIPToValidate)
                        boolReturn = true;

                    if (dblSiteIPTo > 0 && dblSiteMIPTo > 0)
                    {
                        if (isBetween(dblIPToValidate, dblSiteIPTo, dblSiteMIPTo) == true)
                        {
                            boolReturn = true;
                        }
                    }
                    else if (dblSiteIPTo > 0)
                    {
                        if (dblSiteIPTo == dblIPToValidate)
                            boolReturn = true;
                    }
                    else if (dblSiteMIPTo > 0)
                    {
                        if (dblSiteMIPTo == dblIPToValidate)
                            boolReturn = true;
                    }
                }
                else
                {
                    if (dblSiteIP > 0 && dblSiteIPTo > 0)
                    {
                        if (isBetween(dblIPToValidate, dblSiteIP, dblSiteIPTo) == true)
                        {
                            boolReturn = true;
                        }
                    }
                    else if (dblSiteIP > 0)
                    {
                        if (dblSiteIP == dblIPToValidate)
                            boolReturn = true;
                    }
                    else if (dblSiteIPTo > 0)
                    {
                        if (dblSiteIPTo == dblIPToValidate)
                            boolReturn = true;
                    }
                }

                return boolReturn;
            }
            catch (Exception objExp)
            {
                return false;
            }
        }

        public static String FormatURLToIP(String strURL)
        {
            strURL = strURL.Replace("www.", "");
            strURL = strURL.Replace("http://", "");
            strURL = strURL.Replace("https://", "");
            strURL = strURL.Replace("/", "");

            if (strURL.IndexOf(":") != -1)
            {
                char[] delimiters = new char[] { ':' };
                string[] parts = strURL.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
                strURL = parts[0];
            }

            return strURL;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="iNum"></param>
        /// <param name="iFrom"></param>
        /// <param name="iTo"></param>
        /// <returns></returns>
        private static bool isBetween(Double iNum, Double iFrom, Double iTo)
        {
            if (iNum == 0)
                return false;

            if (iNum >= iFrom && iNum <= iTo)
            {
                return true;
            }
            return false;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="text"></param>
        /// <returns></returns>
        public static bool IsNumericIP(string text)
        {
            //Regex objRegex = new Regex(@"^[-+]?[0-9]*\.?[0-9]+$");
            Regex objRegex = new Regex(@"^[-+]?[0-9]*\.?[0-9]+$*\.?[0-9]+$*\.?[0-9]+$*\.?[0-9]+$");

            return objRegex.IsMatch(text);
        }
    }
}