using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace ConsoleApplication17 {
    class Program {
        const string url = "http://www.phonearena.com";
        const string mainurl = "http://www.phonearena.com/phones/manufacturers";
        const string fileName = "phones.txt";
        static void Main (string[] args) {

            System.IO.File.WriteAllText(fileName,"");
            foreach(String m in applyRegex(@"(?<=<a href="")\/phones\/manufacturers.*(?="" class)",getSource(mainurl))){
                int number = 1;
                Console.Write(number + " ");
                System.IO.File.AppendAllText(fileName,m.Split('/')[m.Split('/').ToList<string>().Count-1] + ":" + Environment.NewLine);
                string source = getSource(url+m);
                int maxPg = Convert.ToInt32(applyRegex(@"(?<=onclick='changePage\().?\d(?=, this.href)",source)[applyRegex(@"(?<=onclick='changePage\().?\d(?=, this.href)",source).Count-1]);
                string regexPhone = @"(?<=alt="").*?(?="" widht=""150"")";
                foreach(String s in applyRegex(regexPhone,source))
                    System.IO.File.AppendAllText(fileName,s+" ");
                Console.Write(maxPg + ": ");
                for(int i = 2;i<=maxPg;i++) {
                    Console.Write(i+" ");
                    foreach(String s in applyRegex(regexPhone,getSource(url+m+"/page/"+i+"/")))
                        System.IO.File.AppendAllText(fileName,s+" ");
                }
                System.IO.File.AppendAllText(fileName,Environment.NewLine);
                Console.Clear();
                number++;
            }

        }

        public static string getSource (string url) {
            using(WebClient client = new WebClient()) {
                return client.DownloadString(url);
            }
        }
        public static List<string> applyRegex (string regex,string sourcestring) {
            Regex re = new Regex(regex);

            return re.Matches(sourcestring).Cast<Match>().Select(mm => mm.Value).Skip(1).Distinct().ToList<string>();
        }
    }
}