#region Copyright
// /************************************************************************
//    Copyright (c) 2016 Jamie Rees
//    File: AdminModule.cs
//    Created By: Jamie Rees
//   
//    Permission is hereby granted, free of charge, to any person obtaining
//    a copy of this software and associated documentation files (the
//    "Software"), to deal in the Software without restriction, including
//    without limitation the rights to use, copy, modify, merge, publish,
//    distribute, sublicense, and/or sell copies of the Software, and to
//    permit persons to whom the Software is furnished to do so, subject to
//    the following conditions:
//   
//    The above copyright notice and this permission notice shall be
//    included in all copies or substantial portions of the Software.
//   
//    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
//    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
//    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
//    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
//    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
//    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
//    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//  ************************************************************************/
using System.Net;
using PlexRequests.Helpers.Exceptions;


#endregion

using System.Collections.Generic;
using System.Dynamic;
using System.Linq;
using MarkdownSharp;

using Nancy;
using Nancy.Extensions;
using Nancy.ModelBinding;
using Nancy.Responses.Negotiation;
using Nancy.Validation;

using NLog;

using PlexRequests.Api;
using PlexRequests.Api.Interfaces;
using PlexRequests.Core;
using PlexRequests.Core.SettingModels;
using PlexRequests.Helpers;
using PlexRequests.Services.Interfaces;
using PlexRequests.Services.Notification;
using PlexRequests.Store.Models;
using PlexRequests.Store.Repository;
using PlexRequests.UI.Helpers;
using PlexRequests.UI.Models;
using System;
using System.Diagnostics;

using Nancy.Json;
using Nancy.Security;

namespace PlexRequests.UI.Modules
{
    public class AdminModule : BaseModule
    {
        private ISettingsService<PlexRequestSettings> PrService { get; }
        private ISettingsService<CouchPotatoSettings> CpService { get; }
        private ISettingsService<AuthenticationSettings> AuthService { get; }
        private ISettingsService<PlexSettings> PlexService { get; }
        private ISettingsService<SonarrSettings> SonarrService { get; }
        private ISettingsService<SickRageSettings> SickRageService { get; }
        private ISettingsService<EmailNotificationSettings> EmailService { get; }
        private ISettingsService<PushbulletNotificationSettings> PushbulletService { get; }
        private ISettingsService<PushoverNotificationSettings> PushoverService { get; }
        private ISettingsService<HeadphonesSettings> HeadphonesService { get; }
        private ISettingsService<LogSettings> LogService { get; }
        private IPlexApi PlexApi { get; }
        private ISonarrApi SonarrApi { get; }
        private IPushbulletApi PushbulletApi { get; }
        private IPushoverApi PushoverApi { get; }
        private ICouchPotatoApi CpApi { get; }
        private IRepository<LogEntity> LogsRepo { get; }
        private INotificationService NotificationService { get; }
        private ICacheProvider Cache { get; }

        private static Logger Log = LogManager.GetCurrentClassLogger();
        public AdminModule(ISettingsService<PlexRequestSettings> prService,
            ISettingsService<CouchPotatoSettings> cpService,
            ISettingsService<AuthenticationSettings> auth,
            ISettingsService<PlexSettings> plex,
            ISettingsService<SonarrSettings> sonarr,
            ISettingsService<SickRageSettings> sickrage,
            ISonarrApi sonarrApi,
            ISettingsService<EmailNotificationSettings> email,
            IPlexApi plexApi,
            ISettingsService<PushbulletNotificationSettings> pbSettings,
            PushbulletApi pbApi,
            ICouchPotatoApi cpApi,
            ISettingsService<PushoverNotificationSettings> pushoverSettings,
            IPushoverApi pushoverApi,
            IRepository<LogEntity> logsRepo,
            INotificationService notify,
            ISettingsService<HeadphonesSettings> headphones,
            ISettingsService<LogSettings> logs,
            ICacheProvider cache) : base("admin", prService)
        {
            PrService = prService;
            CpService = cpService;
            AuthService = auth;
            PlexService = plex;
            SonarrService = sonarr;
            SonarrApi = sonarrApi;
            EmailService = email;
            PlexApi = plexApi;
            PushbulletService = pbSettings;
            PushbulletApi = pbApi;
            CpApi = cpApi;
            SickRageService = sickrage;
            LogsRepo = logsRepo;
            PushoverService = pushoverSettings;
            PushoverApi = pushoverApi;
            NotificationService = notify;
            HeadphonesService = headphones;
            LogService = logs;
            Cache = cache;

			this.RequiresClaims(UserClaims.Admin);
			
            Get["/"] = _ => Admin();

            Get["/authentication"] = _ => Authentication();
            Post["/authentication"] = _ => SaveAuthentication();

            Post["/"] = _ => SaveAdmin();

            Post["/requestauth"] = _ => RequestAuthToken();

            Get["/getusers"] = _ => GetUsers();

            Get["/couchpotato"] = _ => CouchPotato();
            Post["/couchpotato"] = _ => SaveCouchPotato();

            Get["/plex"] = _ => Plex();
            Post["/plex"] = _ => SavePlex();

            Get["/sonarr"] = _ => Sonarr();
            Post["/sonarr"] = _ => SaveSonarr();

            Get["/sickrage"] = _ => Sickrage();
            Post["/sickrage"] = _ => SaveSickrage();

            Post["/sonarrprofiles"] = _ => GetSonarrQualityProfiles();
            Post["/cpprofiles"] = _ => GetCpProfiles();

            Get["/emailnotification"] = _ => EmailNotifications();
            Post["/emailnotification"] = _ => SaveEmailNotifications();
            Post["/testemailnotification"] = _ => TestEmailNotifications();
            Get["/status"] = _ => Status();

            Get["/pushbulletnotification"] = _ => PushbulletNotifications();
            Post["/pushbulletnotification"] = _ => SavePushbulletNotifications();
            Post["/testpushbulletnotification"] = _ => TestPushbulletNotifications();

            Get["/pushovernotification"] = _ => PushoverNotifications();
            Post["/pushovernotification"] = _ => SavePushoverNotifications();
            Post["/testpushovernotification"] = _ => TestPushoverNotifications();

            Get["/logs"] = _ => Logs();
            Get["/loglevel"] = _ => GetLogLevels();
            Post["/loglevel"] = _ => UpdateLogLevels(Request.Form.level);
            Get["/loadlogs"] = _ => LoadLogs();

            Get["/headphones"] = _ => Headphones();
            Post["/headphones"] = _ => SaveHeadphones();

			Post["/createapikey"] = x => CreateApiKey();

            Post["/autoupdate"] = x => AutoUpdate();
        }

        private Negotiator Authentication()
        {
            var settings = AuthService.GetSettings();

            return View["/Authentication", settings];
        }

        private Response SaveAuthentication()
        {
            var model = this.Bind<AuthenticationSettings>();

            var result = AuthService.SaveSettings(model);
            if (result)
            {
                if (!string.IsNullOrEmpty(BaseUrl))
                {
                    return Context.GetRedirect($"~/{BaseUrl}/admin/authentication");
                }
                return Context.GetRedirect("~/admin/authentication");
            }
            if (!string.IsNullOrEmpty(BaseUrl))
            {
                return Context.GetRedirect($"~/{BaseUrl}/error"); //TODO create error page
            }
            return Context.GetRedirect("~/error"); //TODO create error page
        }

        private Negotiator Admin()
        {
            var settings = PrService.GetSettings();
            Log.Trace("Getting Settings:");
            Log.Trace(settings.DumpJson());

            return View["Settings", settings];
        }

        private Response SaveAdmin()
        {
            var model = this.Bind<PlexRequestSettings>();
			var valid = this.Validate (model);
			if (!valid.IsValid) {
				return Response.AsJson(valid.SendJsonError());
			}

			if (!string.IsNullOrWhiteSpace (model.BaseUrl)) {
				if (model.BaseUrl.StartsWith ("/") || model.BaseUrl.StartsWith ("\\"))
				{
					model.BaseUrl = model.BaseUrl.Remove (0, 1);
				}
			}
            var result = PrService.SaveSettings(model);
			if (result) {
				return Response.AsJson (new JsonResponseModel{ Result = true });
			}

			return Response.AsJson (new JsonResponseModel{ Result = false, Message = "We could not save to the database, please try again" });
        }

        private Response RequestAuthToken()
        {
            var user = this.Bind<PlexAuth>();

            if (string.IsNullOrEmpty(user.username) || string.IsNullOrEmpty(user.password))
            {
                return Response.AsJson(new { Result = false, Message = "Please provide a valid username and password" });
            }

            var model = PlexApi.SignIn(user.username, user.password);

            if (model?.user == null)
            {
                return Response.AsJson(new { Result = false, Message = "Incorrect username or password!" });
            }

            var oldSettings = AuthService.GetSettings();
            if (oldSettings != null)
            {
                oldSettings.PlexAuthToken = model.user.authentication_token;
                AuthService.SaveSettings(oldSettings);
            }
            else
            {
                var newModel = new AuthenticationSettings
                {
                    PlexAuthToken = model.user.authentication_token
                };
                AuthService.SaveSettings(newModel);
            }

            return Response.AsJson(new { Result = true, AuthToken = model.user.authentication_token });
        }


        private Response GetUsers()
        {
            var settings = AuthService.GetSettings();

            var token = settings?.PlexAuthToken;
            if (token == null)
            {
                return Response.AsJson(new { Result = true, Users = string.Empty });
            }

			try {
				var users = PlexApi.GetUsers(token);
				if (users == null)
				{
					return Response.AsJson(string.Empty);
				}
				if (users.User == null || users.User?.Length == 0)
				{
					return Response.AsJson(string.Empty);
				}

				var usernames = users.User.Select(x => x.Title);
				return Response.AsJson(new {Result = true, Users = usernames});
			} catch (Exception ex) {
				Log.Error (ex);
				if (ex is WebException || ex is ApiRequestException) {
					return Response.AsJson (new { Result = false, Message ="Could not load the user list! We have connectivity problems connecting to Plex, Please ensure we can access Plex.Tv, The error has been logged." });
				}

				return Response.AsJson (new { Result = false, Message = ex.Message});
			}
        }

        private Negotiator CouchPotato()
        {
            dynamic model = new ExpandoObject();
            var settings = CpService.GetSettings();
            model = settings;

            return View["CouchPotato", model];
        }



        private Response SaveCouchPotato()
        {
            var couchPotatoSettings = this.Bind<CouchPotatoSettings>();
            var valid = this.Validate(couchPotatoSettings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }

            var result = CpService.SaveSettings(couchPotatoSettings);
            return Response.AsJson(result
                ? new JsonResponseModel { Result = true, Message = "Successfully Updated the Settings for CouchPotato!" }
                : new JsonResponseModel { Result = false, Message = "Could not update the settings, take a look at the logs." });
        }

        private Negotiator Plex()
        {
            var settings = PlexService.GetSettings();

            return View["Plex", settings];
        }

        private Response SavePlex()
        {
            var plexSettings = this.Bind<PlexSettings>();
            var valid = this.Validate(plexSettings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }


            var result = PlexService.SaveSettings(plexSettings);

            return Response.AsJson(result
                ? new JsonResponseModel { Result = true, Message = "Successfully Updated the Settings for Plex!" }
                : new JsonResponseModel { Result = false, Message = "Could not update the settings, take a look at the logs." });
        }

        private Negotiator Sonarr()
        {
            var settings = SonarrService.GetSettings();

            return View["Sonarr", settings];
        }

        private Response SaveSonarr()
        {
            var sonarrSettings = this.Bind<SonarrSettings>();

            var valid = this.Validate(sonarrSettings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            var sickRageEnabled = SickRageService.GetSettings().Enabled;
            if (sickRageEnabled)
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = "SickRage is enabled, we cannot enable Sonarr and SickRage" });
            }
            var result = SonarrService.SaveSettings(sonarrSettings);

            return Response.AsJson(result
                ? new JsonResponseModel { Result = true, Message = "Successfully Updated the Settings for Sonarr!" }
                : new JsonResponseModel { Result = false, Message = "Could not update the settings, take a look at the logs." });
        }

        private Negotiator Sickrage()
        {
            var settings = SickRageService.GetSettings();

            return View["Sickrage", settings];
        }

        private Response SaveSickrage()
        {
            var sickRageSettings = this.Bind<SickRageSettings>();

            var valid = this.Validate(sickRageSettings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }

            var sonarrEnabled = SonarrService.GetSettings().Enabled;
            if (sonarrEnabled)
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = "Sonarr is enabled, we cannot enable Sonarr and SickRage" });
            }
            var result = SickRageService.SaveSettings(sickRageSettings);

            return Response.AsJson(result
                ? new JsonResponseModel { Result = true, Message = "Successfully Updated the Settings for SickRage!" }
                : new JsonResponseModel { Result = false, Message = "Could not update the settings, take a look at the logs." });
        }

        private Response GetSonarrQualityProfiles()
        {
            var settings = this.Bind<SonarrSettings>();
            var profiles = SonarrApi.GetProfiles(settings.ApiKey, settings.FullUri);

            // set the cache
            if (profiles != null)
            {
                Cache.Set(CacheKeys.SonarrQualityProfiles, profiles);
            }

            return Response.AsJson(profiles);
        }


        private Negotiator EmailNotifications()
        {
            var settings = EmailService.GetSettings();
            return View["EmailNotifications", settings];
        }

        private Response TestEmailNotifications()
        {
            var settings = this.Bind<EmailNotificationSettings>();
            var valid = this.Validate(settings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            var notificationModel = new NotificationModel
            {
                NotificationType = NotificationType.Test,
                DateTime = DateTime.Now
            };
            try
            {
                NotificationService.Subscribe(new EmailMessageNotification(EmailService));
                settings.Enabled = true;
                NotificationService.Publish(notificationModel, settings);
                Log.Info("Sent email notification test");
            }
            catch (Exception)
            {
                Log.Error("Failed to subscribe and publish test Email Notification");
            }
            finally
            {
                NotificationService.UnSubscribe(new EmailMessageNotification(EmailService));
            }
            return Response.AsJson(new JsonResponseModel { Result = true, Message = "Successfully sent a test Email Notification!" });
        }

        private Response SaveEmailNotifications()
        {
            var settings = this.Bind<EmailNotificationSettings>();
            var valid = this.Validate(settings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            Log.Trace(settings.DumpJson());

            var result = EmailService.SaveSettings(settings);

            if (settings.Enabled)
            {
                NotificationService.Subscribe(new EmailMessageNotification(EmailService));
            }
            else
            {
                NotificationService.UnSubscribe(new EmailMessageNotification(EmailService));
            }

            Log.Info("Saved email settings, result: {0}", result);
            return Response.AsJson(result
                ? new JsonResponseModel { Result = true, Message = "Successfully Updated the Settings for Email Notifications!" }
                : new JsonResponseModel { Result = false, Message = "Could not update the settings, take a look at the logs." });
        }

        private Negotiator Status()
        {
            var checker = new StatusChecker();
            var status = checker.GetStatus();
            var md = new Markdown(new MarkdownOptions { AutoNewLines = true });
            status.ReleaseNotes = md.Transform(status.ReleaseNotes);
            return View["Status", status];
        }

        private Response AutoUpdate()
        {
            var url = Request.Form["url"];
            var startInfo = new ProcessStartInfo("PlexRequests.Updater.exe") { Arguments = url};
            Process.Start(startInfo);
          
            Environment.Exit(0);
            return Nancy.Response.NoBody;
        }

        private Negotiator PushbulletNotifications()
        {
            var settings = PushbulletService.GetSettings();
            return View["PushbulletNotifications", settings];
        }

        private Response SavePushbulletNotifications()
        {
            var settings = this.Bind<PushbulletNotificationSettings>();
            var valid = this.Validate(settings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            Log.Trace(settings.DumpJson());

            var result = PushbulletService.SaveSettings(settings);
            if (settings.Enabled)
            {
                NotificationService.Subscribe(new PushbulletNotification(PushbulletApi, PushbulletService));
            }
            else
            {
                NotificationService.UnSubscribe(new PushbulletNotification(PushbulletApi, PushbulletService));
            }

            Log.Info("Saved email settings, result: {0}", result);
            return Response.AsJson(result
                ? new JsonResponseModel { Result = true, Message = "Successfully Updated the Settings for Pushbullet Notifications!" }
                : new JsonResponseModel { Result = false, Message = "Could not update the settings, take a look at the logs." });
        }

        private Response TestPushbulletNotifications()
        {
            var settings = this.Bind<PushbulletNotificationSettings>();
            var valid = this.Validate(settings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            var notificationModel = new NotificationModel
            {
                NotificationType = NotificationType.Test,
                DateTime = DateTime.Now
            };
            try
            {
                NotificationService.Subscribe(new PushbulletNotification(PushbulletApi, PushbulletService));
                settings.Enabled = true;
                NotificationService.Publish(notificationModel, settings);
                Log.Info("Sent pushbullet notification test");
            }
            catch (Exception)
            {
                Log.Error("Failed to subscribe and publish test Pushbullet Notification");
            }
            finally
            {
                NotificationService.UnSubscribe(new PushbulletNotification(PushbulletApi, PushbulletService));
            }
            return Response.AsJson(new JsonResponseModel { Result = true, Message = "Successfully sent a test Pushbullet Notification!" });
        }

        private Negotiator PushoverNotifications()
        {
            var settings = PushoverService.GetSettings();
            return View["PushoverNotifications", settings];
        }

        private Response SavePushoverNotifications()
        {
            var settings = this.Bind<PushoverNotificationSettings>();
            var valid = this.Validate(settings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            Log.Trace(settings.DumpJson());

            var result = PushoverService.SaveSettings(settings);
            if (settings.Enabled)
            {
                NotificationService.Subscribe(new PushoverNotification(PushoverApi, PushoverService));
            }
            else
            {
                NotificationService.UnSubscribe(new PushoverNotification(PushoverApi, PushoverService));
            }

            Log.Info("Saved email settings, result: {0}", result);
            return Response.AsJson(result
                ? new JsonResponseModel { Result = true, Message = "Successfully Updated the Settings for Pushover Notifications!" }
                : new JsonResponseModel { Result = false, Message = "Could not update the settings, take a look at the logs." });
        }

        private Response TestPushoverNotifications()
        {
            var settings = this.Bind<PushoverNotificationSettings>();
            var valid = this.Validate(settings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            var notificationModel = new NotificationModel
            {
                NotificationType = NotificationType.Test,
                DateTime = DateTime.Now
            };
            try
            {
                NotificationService.Subscribe(new PushoverNotification(PushoverApi, PushoverService));
                settings.Enabled = true;
                NotificationService.Publish(notificationModel, settings);
                Log.Info("Sent pushover notification test");
            }
            catch (Exception)
            {
                Log.Error("Failed to subscribe and publish test Pushover Notification");
            }
            finally
            {
                NotificationService.UnSubscribe(new PushoverNotification(PushoverApi, PushoverService));
            }
            return Response.AsJson(new JsonResponseModel { Result = true, Message = "Successfully sent a test Pushover Notification!" });
        }

        private Response GetCpProfiles()
        {
            var settings = this.Bind<CouchPotatoSettings>();
            var valid = this.Validate(settings);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            var profiles = CpApi.GetProfiles(settings.FullUri, settings.ApiKey);

            // set the cache
            if (profiles != null)
            {
                Cache.Set(CacheKeys.CouchPotatoQualityProfiles, profiles);
            }

            return Response.AsJson(profiles);
        }

        private Negotiator Logs()
        {
            return View["Logs"];
        }

        private Response LoadLogs()
        {
            JsonSettings.MaxJsonLength = int.MaxValue;
            var allLogs = LogsRepo.GetAll().OrderByDescending(x => x.Id).Take(200);
            var model = new DatatablesModel<LogEntity> { Data = new List<LogEntity>() };
            foreach (var l in allLogs)
            {
                l.DateString = l.Date.ToString("G");
                model.Data.Add(l);
            }
            return Response.AsJson(model);
        }

        private Response GetLogLevels()
        {
            var levels = LogManager.Configuration.LoggingRules.FirstOrDefault(x => x.NameMatches("database"));
            return Response.AsJson(levels.Levels);
        }

        private Response UpdateLogLevels(int level)
        {
            var settings = LogService.GetSettings();

            // apply the level
            var newLevel = LogLevel.FromOrdinal(level);
            LoggingHelper.ReconfigureLogLevel(newLevel);

            //save the log settings
            settings.Level = level;
            LogService.SaveSettings(settings);

            return Response.AsJson(new JsonResponseModel { Result = true, Message = $"The new log level is now {newLevel}" });
        }

        private Negotiator Headphones()
        {
            var settings = HeadphonesService.GetSettings();
            return View["Headphones", settings];
        }

        private Response SaveHeadphones()
        {
            var settings = this.Bind<HeadphonesSettings>();

            var valid = this.Validate(settings);
            if (!valid.IsValid)
            {
                var error = valid.SendJsonError();
                Log.Info("Error validating Headphones settings, message: {0}", error.Message);
                return Response.AsJson(error);
            }
            Log.Trace(settings.DumpJson());

            var result = HeadphonesService.SaveSettings(settings);

            Log.Info("Saved headphones settings, result: {0}", result);
            return Response.AsJson(result
                ? new JsonResponseModel { Result = true, Message = "Successfully Updated the Settings for Headphones!" }
                : new JsonResponseModel { Result = false, Message = "Could not update the settings, take a look at the logs." });
        }

		private Response CreateApiKey()
		{
			this.RequiresClaims(UserClaims.Admin);
		    var apiKey = Guid.NewGuid().ToString("N");
            var settings = PrService.GetSettings();

			settings.ApiKey = apiKey;
            PrService.SaveSettings(settings);

			return Response.AsJson(apiKey);
		}
    }
}