using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.IO.Packaging;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml.Linq;

namespace Samples {
    class Program {
        const string CandidatesFilePath = "D:\\Candidates.csv";
        const string employeesDataFilePath = "D:\\e3s.epam.com-getData.har";
        const string notDataOutputFilePath = "D:\\NotFindedEmploees.csv";

        static string employeesDataContent;
        static Dictionary<string, string> tags = new Dictionary<string, string>{
            { "M&E", "M&E CV" },
            { "Corporate", "Corporate CV" },
            { "Bulgaria", "Bulgaria CV" },
            { "Google", "Google" }
        };

        static void Main(string[] args) {
            ReadEmploeesData();

            var notFindedEmployees = new List<string>();
            foreach (var condidate in ReadCandidates().Skip(2)) {
                var fields = condidate.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
                if (fields.Length != 4) continue;

                fields[0] = Regex.Replace(fields[0], "[^a-zA-Z]", " ");
                var upsaId = GetUpsaId(fields[0]);
                if (upsaId == null) { notFindedEmployees.Add(condidate); continue; }

                var tag = tags[fields[2]];
                var postData = CreatePostData(upsaId, tag);
                var coockie = GetCockie();

                MakeRequest(postData, coockie);
            }

            WriteNotFinded(notFindedEmployees);
        }

        static void ReadEmploeesData() {
            using (var reader = new StreamReader(employeesDataFilePath)) {
                employeesDataContent = reader.ReadToEnd();
            }
        }

        static IEnumerable<string> ReadCandidates() {
            using (var reader = new StreamReader(CandidatesFilePath)) {
                string line;
                while ((line = reader.ReadLine()) != null) {
                    yield return line;
                }
            }
        }

        static string GetUpsaId(string name) {
            string pattern = "{\\\\\"1\\\\\":\\\\\"(?<upsaId>\\d+)\\\\\",\\\\\"2\\\\\":\\\\\"" + name + "\\\\\"";
            var regex = new Regex(pattern);
            var match = regex.Match(employeesDataContent);
            return (string.IsNullOrEmpty(match.Value)) ? null : match.Groups["upsaId"].Value;
        }

        static string GetCockie() {
            string pattern = "\"name\": \"Cookie\",\\s+?\"value\": \"(?<coockie>.*?)\"";
            var regex = new Regex(pattern);
            var match = regex.Match(employeesDataContent);
            return match.Groups["coockie"].Value;
        }

        static string CreatePostData(string upsaId, string tag) {
            var timeSpan = GetTimestamp(DateTime.Now);
            var data = "{\"deleteIds\":[],\"update\":[],\"assign\":[{\"type\":1,\"entityId\":\"" + upsaId +
                "\",\"author\":\"Aliaksandr Orgish\",\"authorId\":\"4000741400003807640\",\"isPrivate\":false,\"name\":\"" + tag +
                "\"}],\"timestamp\":" + timeSpan + "}";
            return data;
        }

        static string GetTimestamp(DateTime value) {
            return value.ToString("yyyyMMddHHmmssfff");
        }

        static void MakeRequest(string data, string coockie) {
            throw new NotImplementedException();
        }

        static void WriteNotFinded(List<string> notFindedEmployees) {
            using (var writer = new StreamWriter(notDataOutputFilePath)) {
                foreach (var employee in notFindedEmployees) {
                    writer.WriteLine(employee);
                }
            }
        }
    }
}