using System;
using System.Collections.Generic;
using System.Threading;
using Google.Apis.Auth.OAuth2;
using Google.Apis.Calendar.v3;
using Google.Apis.Calendar.v3.Data;
using Google.Apis.Gmail.v1;
using Google.Apis.Gmail.v1.Data;
using Google.Apis.Services;

namespace AssurWare.Helpers
{
    public class GoogleClient
    {
        public static GmailService GmailService { get; set; }
        public static CalendarService CalendarService { get;set; }
        public string UserName { get; set; }
        public UserCredential Credential { get; set; }

        public GoogleClient()
        {
            Credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
               new ClientSecrets
               {
                   ClientId = "436107420939-21o8a0tvuu7md9298pv6g0ot20dkn9qp.apps.googleusercontent.com",
                   ClientSecret = "7OXnQ4p9oBh8udQ66GMm85-D"
               },
           new[] {
                GmailService.Scope.MailGoogleCom
                 },
               "me",
               CancellationToken.None
           ).Result;

            UserName = Credential.UderId;

            if (Credential != null)
            {
                GmailService = new GmailService(new BaseClientService.Initializer { HttpClientInitializer = Credential });
                CalendarService = new CalendarService(new BaseClientService.Initializer { HttpClientInitializer = Credential });
            }
        }

        public CalendarList CalendarList()
        {
            if (CalendarService != null)
            {
                var request = CalendarService.CalendarList.List();
                var response = request.Execute();
                return response;
            }

            return null;
        }

        public List<Message> ListMessages(String query)
        {
            var result = new List<Message>();
            var request = GmailService.Users.Messages.List(UserName);
            request.Q = query;

            do
            {
                try
                {
                    var response = request.Execute();
                    result.AddRange(response.Messages);
                    request.PageToken = response.NextPageToken;
                }
                catch (Exception e)
                {

                }
            } while (!String.IsNullOrEmpty(request.PageToken));

            return result;
        }

        public List<Message> GetMessages(List<Message> messageList, int start, int end, String query)
        {
            var result = new List<Message>();

            for (int s = start; s < end; s++)
            {
                var request = GmailService.Users.Messages.Get(UserName, messageList[s].Id);
                var response = request.Execute();
                result.Add(response);
            }

            return result;
        }
    }
}