#region Copyright

// /************************************************************************
//    Copyright (c) 2016 Jamie Rees
//    File: UserWizardModule.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.
//  ************************************************************************/

#endregion

using System;
using System.Linq;
using System.Threading.Tasks;
using Nancy;
using Nancy.Extensions;
using Nancy.ModelBinding;
using Nancy.Validation;
using NLog;
using Ombi.Api.Interfaces;
using Ombi.Core;
using Ombi.Core.SettingModels;
using Ombi.Helpers;
using Ombi.Helpers.Analytics;
using Ombi.Helpers.Permissions;
using Ombi.UI.Authentication;
using Ombi.UI.Helpers;
using Ombi.UI.Models;
using ISecurityExtensions = Ombi.Core.ISecurityExtensions;

using Action = Ombi.Helpers.Analytics.Action;

namespace Ombi.UI.Modules
{
    public class UserWizardModule : BaseModule
    {
        public UserWizardModule(ISettingsService<PlexRequestSettings> pr, ISettingsService<PlexSettings> plex,
            IPlexApi plexApi,
            ISettingsService<AuthenticationSettings> auth, ICustomUserMapper m, IAnalytics a,
            ISecurityExtensions security, IEmbyApi embyApi,
            ISettingsService<EmbySettings> embySettings) : base("wizard", pr, security)
        {
            PlexSettings = plex;
            PlexApi = plexApi;
            PlexRequestSettings = pr;
            Auth = auth;
            Mapper = m;
            Analytics = a;
            EmbySettings = embySettings;
            EmbyApi = embyApi;

            Get["/", true] = async (x, ct) =>
            {
                a.TrackEventAsync(Category.Wizard, Action.Start, "Started the wizard", Username,
                    CookieHelper.GetAnalyticClientId(Cookies));

                var settings = await PlexRequestSettings.GetSettingsAsync();

                if (settings.Wizard)
                {
                    return Context.GetRedirect("~/search");
                }
                return View["Index"];
            };
            Post["/plexAuth"] = x => PlexAuth();
            Post["/plex", true] = async (x, ct) => await Plex();
            Post["/plexrequest", true] = async (x, ct) => await PlexRequest();
            Post["/auth", true] = async (x, ct) => await Authentication();
            Post["/createuser", true] = async (x, ct) => await CreateUser();


            Post["/embyauth", true] = async (x, ct) => await EmbyAuth();
        }

        private ISettingsService<PlexSettings> PlexSettings { get; }
        private IPlexApi PlexApi { get; }
        private ISettingsService<PlexRequestSettings> PlexRequestSettings { get; }
        private ISettingsService<AuthenticationSettings> Auth { get; }
        private ICustomUserMapper Mapper { get; }
        private IAnalytics Analytics { get; }
        private IEmbyApi EmbyApi { get; }
        private ISettingsService<EmbySettings> EmbySettings { get; }

        private static Logger Log = LogManager.GetCurrentClassLogger();


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

            if (string.IsNullOrEmpty(user.username) || string.IsNullOrEmpty(user.password))
            {
                return
                    Response.AsJson(new JsonResponseModel
                    {
                        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 JsonResponseModel { Result = false, Message = "Incorrect username or password!" });
            }

            // Set the auth token in the session so we can use it in the next form
            Session[SessionKeys.UserWizardPlexAuth] = model.user.authentication_token;

            var servers = PlexApi.GetServer(model.user.authentication_token);
            var firstServer = servers.Server.FirstOrDefault();

            return
                Response.AsJson(
                    new { Result = true, firstServer?.Port, Ip = firstServer?.LocalAddresses, firstServer?.Scheme });
        }

        private async Task<Response> Plex()
        {
            var form = this.Bind<PlexSettings>();
            var valid = this.Validate(form);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            form.PlexAuthToken = Session[SessionKeys.UserWizardPlexAuth].ToString();
            // Set the auth token from the previous form

            // Get the machine ID from the settings (This could have changed)
            try
            {
                var servers = PlexApi.GetServer(form.PlexAuthToken);
                var firstServer = servers.Server.FirstOrDefault(x => x.AccessToken == form.PlexAuthToken);

                Session[SessionKeys.UserWizardMachineId] = firstServer?.MachineIdentifier;
                form.MachineIdentifier = firstServer?.MachineIdentifier;
            }
            catch (Exception e)
            {
                // Probably bad settings, just continue
                Log.Error(e);
            }

            var result = await PlexSettings.SaveSettingsAsync(form);
            if (result)
            {
                return Response.AsJson(new JsonResponseModel { Result = true });
            }
            return
                Response.AsJson(new JsonResponseModel
                {
                    Result = false,
                    Message = "Could not save the settings to the database, please try again."
                });
        }

        private async Task<Response> PlexRequest()
        {
            var form = this.Bind<PlexRequestSettings>();
            var valid = this.Validate(form);
            if (!valid.IsValid)
            {
                return Response.AsJson(valid.SendJsonError());
            }
            var currentSettings = await PlexRequestSettings.GetSettingsAsync();
            currentSettings.SearchForMovies = form.SearchForMovies;
            currentSettings.SearchForTvShows = form.SearchForTvShows;
            currentSettings.SearchForMusic = form.SearchForMusic;

            var result = await PlexRequestSettings.SaveSettingsAsync(currentSettings);
            if (result)
            {
                return Response.AsJson(new { Result = true });
            }

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

        private async Task<Response> Authentication()
        {
            var form = this.Bind<AuthenticationSettings>();

            var result = await Auth.SaveSettingsAsync(form);
            if (result)
            {
                return Response.AsJson(new JsonResponseModel { Result = true });
            }
            return
                Response.AsJson(new JsonResponseModel
                {
                    Result = false,
                    Message = "Could not save the settings to the database, please try again."
                });
        }

        private async Task<Response> CreateUser()
        {
            var username = (string)Request.Form.Username;
            var userId = Mapper.CreateUser(username, Request.Form.Password,
                EnumHelper<Permissions>.All() - (int)Permissions.ReadOnlyUser, 0);
            Analytics.TrackEventAsync(Category.Wizard, Action.Finish, "Finished the wizard", username,
                CookieHelper.GetAnalyticClientId(Cookies));
            Session[SessionKeys.UsernameKey] = username;

            // Destroy the Plex Auth Token
            Session.Delete(SessionKeys.UserWizardPlexAuth);

            // Update the settings so we know we have been through the wizard
            var settings = await PlexRequestSettings.GetSettingsAsync();
            settings.Wizard = true;
            await PlexRequestSettings.SaveSettingsAsync(settings);

            var baseUrl = string.IsNullOrEmpty(settings.BaseUrl) ? string.Empty : $"/{settings.BaseUrl}";

            return CustomModuleExtensions.LoginAndRedirect(this, (Guid)userId, fallbackRedirectUrl: $"{baseUrl}/search");
        }

        private async Task<Response> EmbyAuth()
        {
            var ip = (string)Request.Form.Ip;
            var port = (int)Request.Form.Port;
            var apiKey = (string)Request.Form.ApiKey;
            var ssl = (bool)Request.Form.Ssl;

            var settings = new EmbySettings
            {
                ApiKey = apiKey,
                Enable = true,
                Ip = ip,
                Port = port,
                Ssl = ssl,
            };

            try
            {
                // Test that we can connect
                var result = EmbyApi.GetUsers(settings.FullUri, apiKey);

                if (result != null && result.Any())
                {
                    settings.AdministratorId = result.FirstOrDefault(x => x.Policy.IsAdministrator)?.Id ?? string.Empty;
                    await EmbySettings.SaveSettingsAsync(settings);

                    return Response.AsJson(new JsonResponseModel
                    {
                        Result = true
                    });
                }
            }
            catch (Exception e)
            {
                return Response.AsJson(new JsonResponseModel
                {
                    Result = false,
                    Message = $"Could not connect to Emby, please check your settings. Error: {e.Message}"
                });
            }

            return Response.AsJson(new JsonResponseModel
            {
                Result = false,
                Message = "Could not connect to Emby, please check your settings."
            });
        }
    }
}