using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using Filtr.Core.FacebookUsers.Data;
using Nancy;

using Sony.Filtr.Applications;
using Sony.Filtr.Core.Facebook;

namespace Sony.Filtr.AdminAPI.Modules
{
    public class FacebookModule : BaseModule
    {
        public FacebookModule(FacebookUserManager facebookUserManager, ApplicationInstanceManager applicationInstanceManager)
            : base(applicationInstanceManager)
        {
            Get["GetFacebookUsers", "/{countryCode}/facebookUsers"] = parameters =>
            {
                var culture = (CurrentApplication != null ? CurrentApplication.CultureInfo : null);
                var users = facebookUserManager.GetFacebookUsers(culture);
                return Response.AsJson(users);
            };

            Get["GetFacebookUsersExcel", "/{countryCode}/facebookUsers/excel"] = parameters =>
            {
                var culture = (CurrentApplication != null ? CurrentApplication.CultureInfo : null);
                
                var users = facebookUserManager.GetFacebookUsers(culture);
                var sb = GetFacebookUsersCsv(users);

                var cultureString = (culture != null) ? culture.ToString() : "all";
                var fileName = string.Format("FBUserExport-{0}-{1}.csv", cultureString, DateTime.Now.ToShortDateString());
                return Response.AsText(sb.ToString(), "text/csv").WithHeader("Content-disposition", "attachment;filename=\"" + fileName + "\"");
            };

        }

        private string GetFacebookUsersCsv(List<NativeFacebookUserInfo> users)
        {
            StringBuilder sb = new StringBuilder();
            sb.AppendLine("FacebookID;UserName;Name;Email;Gender;Locale;Artists;Education;Athletes;Hometown;Languages;TimeZone;Work");
            foreach (var user in users)
            {
                var info = user;
                var lang = GetValuesString(info.Languages);
                var education = (info.Education != null)
                    ? string.Join(",", info.Education.Select(e => e.School.Name))
                    : string.Empty;
                var athlethes = GetValuesString(info.FavoriteAthletes);
                var work = (info.Work != null) ? string.Join(",", info.Work.Select(w => w.Employer.Name)) : string.Empty;
                var artists = (info.Artists != null) ? string.Join(",", info.Artists) : string.Empty;
                var homeTown = (info.HomeTown != null) ? info.HomeTown.Name : string.Empty;
                var timeZone = info.TimeZone.ToString(CultureInfo.InvariantCulture);
                //var teams = GetValuesString(info.FavoriteTeams);
                //var inspirationalPeople = GetValuesString(info.InspirationalPeople);
                //var quotes = string.Join(",", info.Quotes);
                //var sports = (info.Sports != null) ? string.Join(",", info.Sports) : string.Empty;

                var values =
                    new[]
                    {
                        info.ID, info.UserName, info.Name, info.Email, info.Gender, info.Locale, artists, education, athlethes,
                        homeTown, lang, timeZone, work
                    }.ToList();

                sb.AppendLine(string.Join(";",
                    values.Select(v => (v != null) ? v.Replace(";", "").Replace('\n', ' ').Replace('\r', ' ') : string.Empty)));
            }
            return sb.ToString();
        }

        private string GetValuesString(List<InnerObject> list)
        {
            if (list != null && list.Any())
                return string.Join(",", list.Select(l => l.Name));
            return string.Empty;
        }
    }
}