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

/// <summary>
/// ip 的摘要描述
/// </summary>
/// 
namespace MyWeb
{
    public class ip:function
    {
       
        public ip()
        {
            //
            // TODO: 在這裡新增建構函式邏輯
            //
        }

        public static string Get()
        {           
            string myip = HttpContext.Current.Request.UserHostAddress;
            if (myip == "::1")    
                myip = "127.0.0.1";      
            return myip;
        }

        //由ip取得國別
        public string nation(string DefNation="")
        {
            language lang = new language();
            string nation = DefNation != "" ? DefNation : lang.defaultNation();

            string myip = Get();         
            string cname = "ip_" + myip.Replace(".", "_");

            //清除之前暫存其它ip
            List<string> clearItem = new List<string>();
            foreach (string item in HttpContext.Current.Request.Cookies)
                if (item.Split('_')[0] == "ip" && item != cname)
                    clearItem.Add(item);
            foreach (string item in clearItem)
                HttpContext.Current.Response.Cookies[item].Expires = DateTime.Now.AddDays(-1);
                       
            if (myip != "127.0.0.1")
            {
                if (HttpContext.Current.Request.Cookies[cname] != null)
                {
                    nation = HttpContext.Current.Request.Cookies[cname].Value;
                }
                else
                {
                    string[] data = WRequest("http://ip2c.org/" + myip, Method.GET , "").data.Split(';');  //1;TW;TWN;Taiwan; Republic of China (ROC)
                    if (data[0] == "1" && data.Length >= 2)
                    {
                        nation = data[1];
                        HttpContext.Current.Response.Cookies[cname].Value = nation;
                        HttpContext.Current.Response.Cookies[cname].Expires = DateTime.Now.AddDays(3);
                    }
                }
            }

            if (!isStrNull(lang.Text(nation)))
            {
                //網站有對應的語系
                return nation;
            }
            else
            {
                //網站沒對應的語系，傳回指定預設的語系
                return DefNation != "" ? DefNation : lang.defaultNation();
            }

        }

    }

}