using DevExpress.Utils;
using DevExpress.Web;
using DevExpress.Web.ASPxThemes;
using DevExpress.Web.Mvc;
using DevExpress.XtraPrinting;
using DevExpress.XtraScheduler;
using GreenTree.Nachtragsmanagement.Core.Authentication;
using GreenTree.Nachtragsmanagement.Core.Domain.Deviation;
using GreenTree.Nachtragsmanagement.Core.Domain.User;
using GreenTree.Nachtragsmanagement.Services.Appendix;
using GreenTree.Nachtragsmanagement.Services.Deviation;
using GreenTree.Nachtragsmanagement.Services.Logging;
using GreenTree.Nachtragsmanagement.Services.Misc;
using GreenTree.Nachtragsmanagement.Services.Scheduling;
using GreenTree.Nachtragsmanagement.Services.User;
using GreenTree.Nachtragsmanagement.Web.Framework.Authorization;
using GreenTree.Nachtragsmanagement.Web.Models.Global;
using GreenTree.Nachtragsmanagement.Web.Models.Misc;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace GreenTree.Nachtragsmanagement.Web.Controllers
{
    public class MiscController : Controller
    {
        private readonly IMiscService _miscService;
        private readonly IUserService _userService;
        private readonly INotificationService _notificationService;
        private readonly INotificationScheduler _notificationScheduler;
        private readonly IUserHelper _userHelper;
        private readonly ILogger _logger;

        public MiscController(
            IMiscService miscService,
            IUserService userService,
            INotificationService notificationService,
            INotificationScheduler notificationScheduler,
            IUserHelper userHelper,
            ILogger logger)
        {
            _miscService = miscService;
            _userService = userService;
            _notificationService = notificationService;
            _notificationScheduler = notificationScheduler;
            _userHelper = userHelper;
            _logger = logger;

            ViewData["AllUsers"] = _userService.GetAllUsers();
            ViewData["AllUsersWithRole"] =
                _userService.GetAllUsers()
                    .Select(u => new
                    {
                        Id = u.Id,
                        Description = String.Format("{0} - {1}", u.Lastname,
                            String.Join(", ", u.Roles
                                .Select(r => r.Description)))
                    })
                    .ToList();

            ViewData["AllNotificationPlugins"] =
                _notificationService.GetNotificationPlugins();
        }

        #region MailNotifications

        /// <summary>
        /// Basic mailNotification view function
        /// </summary>
        [FunctionAuthorize(true, "Misc-MailNotifications")]
        public ActionResult ViewMailNotifications()
        {
            var mailNotifications = _miscService.GetAllMailNotifications();
            var mailNotificationModels = mailNotifications
                .Select(u => MailNotificationDataModel.FromMailNotification(
                    u, false, _notificationService, _notificationScheduler))
                .ToList();

            return View("~/Views/Misc/MailNotifications.cshtml", mailNotificationModels);
        }

        /// <summary>
        /// Get JSON data of specific mailNotification
        /// </summary>
        /// <param name="id">MailNotification id.</param>
        public ActionResult GetMailNotification(int id = -1)
        {
            var mailNotification = _miscService.GetMailNotificationById(id);
            if (mailNotification == null)
                return new JsonResult
                {
                    Data = "notFound",
                    JsonRequestBehavior = JsonRequestBehavior.AllowGet
                };

            var mailNotificationModel = MailNotificationDataModel.FromMailNotification(
                mailNotification, false, _notificationService, _notificationScheduler);
            
            return new JsonResult
            {
                Data = JsonConvert.SerializeObject(mailNotificationModel),
                JsonRequestBehavior = JsonRequestBehavior.AllowGet
            };
        }

        /// <summary>
        /// Callback result for mailNotification grid
        /// </summary>
        /// <param name="scrollHeight">The height of the grid scrollable component.</param>
        public ActionResult PartialMailNotifications(int scrollHeight = -1)
        {
            var mailNotifications = _miscService.GetAllMailNotifications();
            var mailNotificationModels = mailNotifications
                .Select(u => MailNotificationDataModel.FromMailNotification(
                    u, false, _notificationService, _notificationScheduler))
                .ToList();

            ViewData["ScrollHeight"] = scrollHeight;

            return PartialView("~/Views/Misc/_MailNotificationGridPartial.cshtml", mailNotificationModels);
        }

        /// <summary>
        /// Callback result for mailNotification job combobox
        /// </summary>
        /// <param name="pluginSystemName">The system name of the corresponding notification plugin.</param>
        public ActionResult PartialNotificationPluginJobs(string pluginSystemName)
        {
            var notificationPlugin = _notificationService.GetNotificationPlugin(pluginSystemName);

            if (notificationPlugin == null)
                return PartialView("~/Views/Misc/_MailNotificationPluginJobsPartial.cshtml", null);

            var mailNotificationModel = new MailNotificationDataModel
            {
                NotificationPlugin = notificationPlugin
            };

            return PartialView("~/Views/Misc/_MailNotificationPluginJobsPartial.cshtml", mailNotificationModel);
        }

        /// <summary>
        /// Export result for mailNotification grid
        /// </summary>
        [HttpPost]
        public ActionResult ExportPartialMailNotifications(GridViewExportFormat exportformat)
        {
            if (exportformat == null || String.IsNullOrEmpty(exportformat.Format))
                return new EmptyResult();

            var mailNotifications = _miscService.GetAllMailNotifications();
            var mailNotificationModels = mailNotifications
                .Select(u => MailNotificationDataModel.FromMailNotification(
                    u, false, _notificationService, _notificationScheduler))
                .ToList();

            var viewContext = new ViewContext();
            var viewPage = new ViewPage();
            var htmlHelper = new HtmlHelper(viewContext, viewPage);

            var gridViewSettings = Extensions.GridViewSettingsHelper.MailNotificationGridViewSettings(htmlHelper);

            switch (exportformat.Format.ToLower())
            {
                case "xlsx":
                    return GridViewExtension.ExportToXlsx(gridViewSettings, mailNotificationModels);
                case "xls":
                    return GridViewExtension.ExportToXls(gridViewSettings, mailNotificationModels);
                case "pdf":
                    return GridViewExtension.ExportToPdf(gridViewSettings, mailNotificationModels);
                default:
                    return new EmptyResult();
            }
        }

        /// <summary>
        /// Partial edit for editing of existing or for new mailNotification
        /// </summary>
        /// <param name="id">Id for existing mailNotification, otherweise -1.</param>
        public ActionResult EditMailNotification(int id = -1)
        {
            var mailNotification = _miscService.GetMailNotificationById(id);
            var mailNotificationModel = MailNotificationDataModel.FromMailNotification(
                mailNotification, true, _notificationService, _notificationScheduler);

            return PartialView("~/Views/Misc/_MailNotificationEditPartial.cshtml", mailNotificationModel);
        }

        /// <summary>
        /// Partial edit result if ModelState is valid, otherwise simple JSON result for success
        /// </summary>
        /// <param name="mailNotificationModel">MailNotification model to be saved.</param>
        [HttpPost, ValidateInput(false)]
        public ActionResult EditMailNotification(MailNotificationDataModel mailNotificationModel)
        {
            try
            {
                if (!ModelState.IsValid)
                {
                    foreach (var role in mailNotificationModel.UserValues)
                        mailNotificationModel.UserDescriptions.Add(
                            ((IList<User>)ViewData["AllUsers"])
                                .First(r => r.Id == role).Lastname);

                    var notificationPlugin = _notificationService.GetNotificationPlugin(mailNotificationModel.NotificationPluginSystemName);

                    if (notificationPlugin != null)
                        mailNotificationModel.NotificationPlugin = notificationPlugin;

                    return PartialView("~/Views/Misc/_MailNotificationEditPartial.cshtml", mailNotificationModel);
                }

                if (mailNotificationModel.CronExpression.Split(' ').Length == 5)
                    mailNotificationModel.CronExpression = mailNotificationModel.CronExpression + " *";

                var selectedUsers = _userService.GetUsersByIds(mailNotificationModel.UserValues.ToArray());

                if (mailNotificationModel.Id == -1)
                {
                    var mailNotification = mailNotificationModel.ToMailNotification();

                    mailNotification.SetUsers(selectedUsers);

                    _miscService.InsertMailNotification(mailNotification);

                    _logger.Entity(mailNotification, Core.Domain.Logging.LogEntityActivity.Insert, _userHelper.FromCookies());
                }
                else
                {
                    var mailNotification = _miscService.GetMailNotificationById(mailNotificationModel.Id);

                    mailNotification.CronExpression = mailNotificationModel.CronExpression;
                    mailNotification.NotificationPluginSystemName = mailNotificationModel.NotificationPluginSystemName;
                    mailNotification.NotificationJobSystemName = mailNotificationModel.NotificationJobSystemName;

                    mailNotification.SetUsers(selectedUsers);

                    _miscService.UpdateMailNotification(mailNotification);

                    _logger.Entity(mailNotification, Core.Domain.Logging.LogEntityActivity.Update, _userHelper.FromCookies());
                }

                _notificationScheduler.Start();

                return new JsonResult
                {
                    Data = "success"
                };
            }
            catch (Exception ex)
            {
                _logger.Error("Fehler bei Speicherung einer Mail-Benachrichtigung.", ex, _userHelper.FromCookies());

                return PartialView("~/Views/Shared/_PopupError.cshtml", ex);
            }
        }

        /// <summary>
        /// Simple JSON result for deleting a specific mailNotification
        /// </summary>
        /// <param name="id">MailNotification id.</param>
        [HttpPost]
        public ActionResult DeleteMailNotification(int id)
        {
            try
            {
                var mailNotification = _miscService.GetMailNotificationById(id);

                if (mailNotification != null)
                    _miscService.DeleteMailNotification(mailNotification);

                _logger.Entity(mailNotification, Core.Domain.Logging.LogEntityActivity.Delete, _userHelper.FromCookies());

                return new JsonResult
                {
                    Data = "success"
                };
            }
            catch (Exception ex)
            {
                _logger.Error("Fehler bei Löschung einer Mail-Benachrichtigung.", ex, _userHelper.FromCookies());

                return PartialView("~/Views/Shared/_PopupError.cshtml", ex);
            }
        }

        /// <summary>
        /// Processes the specific mailNotification
        /// </summary>
        /// <param name="id">MailNotification id.</param>
        [HttpPost]
        public ActionResult ProcessMailNotification(int id)
        {
            try
            {
                var mailNotification = _miscService.GetMailNotificationById(id);

                if (mailNotification != null)
                {
                    var notificationPlugin = _notificationService.GetNotificationPlugin(mailNotification.NotificationPluginSystemName);

                    notificationPlugin.ProcessNotifications(new[] { mailNotification });
                }

                return new JsonResult
                {
                    Data = "success"
                };
            }
            catch (Exception ex)
            {
                _logger.Error("Fehler bei Ausführung einer Mail-Benachrichtigung.", ex, _userHelper.FromCookies());

                return PartialView("~/Views/Shared/_PopupError.cshtml", ex);
            }
        }

        #endregion

        #region Logs

        /// <summary>
        /// Basic log view function
        /// </summary>
        [FunctionAuthorize(true, "Misc-Logs")]
        public ActionResult ViewLogs()
        {
            var logs = _logger.GetAllLogs();
            var logModels = logs
                .Select(u => LogDataModel.FromLog(u, false))
                .ToList();

            return View("~/Views/Misc/Logs.cshtml", logModels);
        }

        /// <summary>
        /// Get JSON data of specific log
        /// </summary>
        /// <param name="id">Log id.</param>
        public ActionResult GetLog(int id = -1)
        {
            var log = _logger.GetLogById(id);
            if (log == null)
                return new JsonResult
                {
                    Data = "notFound",
                    JsonRequestBehavior = JsonRequestBehavior.AllowGet
                };

            var logModel = LogDataModel.FromLog(log, false);

            return new JsonResult
            {
                Data = JsonConvert.SerializeObject(logModel),
                JsonRequestBehavior = JsonRequestBehavior.AllowGet
            };
        }

        /// <summary>
        /// Callback result for log grid
        /// </summary>
        /// <param name="scrollHeight">The height of the grid scrollable component.</param>
        public ActionResult PartialLogs(int scrollHeight = -1)
        {
            var logs = _logger.GetAllLogs();
            var logModels = logs
                .Select(u => LogDataModel.FromLog(u, false))
                .ToList();

            ViewData["ScrollHeight"] = scrollHeight;

            return PartialView("~/Views/Misc/_LogGridPartial.cshtml", logModels);
        }

        /// <summary>
        /// Export result for log grid
        /// </summary>
        [HttpPost]
        public ActionResult ExportPartialLogs(GridViewExportFormat exportformat)
        {
            if (exportformat == null || String.IsNullOrEmpty(exportformat.Format))
                return new EmptyResult();

            var logs = _logger.GetAllLogs();
            var logModels = logs
                .Select(u => LogDataModel.FromLog(u, false))
                .ToList();

            var viewContext = new ViewContext();
            var viewPage = new ViewPage();
            var htmlHelper = new HtmlHelper(viewContext, viewPage);

            var gridViewSettings = Extensions.GridViewSettingsHelper.LogGridViewSettings(htmlHelper);

            switch (exportformat.Format.ToLower())
            {
                case "xlsx":
                    return GridViewExtension.ExportToXlsx(gridViewSettings, logModels);
                case "xls":
                    return GridViewExtension.ExportToXls(gridViewSettings, logModels);
                case "pdf":
                    return GridViewExtension.ExportToPdf(gridViewSettings, logModels);
                default:
                    return new EmptyResult();
            }
        }

        /// <summary>
        /// Partial edit for editing of existing or for new log
        /// </summary>
        /// <param name="id">Id for existing log, otherweise -1.</param>
        public ActionResult ViewLog(int id = -1)
        {
            var log = _logger.GetLogById(id);
            var logModel = LogDataModel.FromLog(log, true);

            return PartialView("~/Views/Misc/_LogViewPartial.cshtml", logModel);
        }

        /// <summary>
        /// Simple JSON result for deleting a specific log
        /// </summary>
        /// <param name="id">Log id.</param>
        [HttpPost]
        public ActionResult DeleteLog(int id)
        {
            try
            {
                var log = _logger.GetLogById(id);

                if (log != null)
                    _logger.DeleteLog(log);

                return new JsonResult
                {
                    Data = "success"
                };
            }
            catch (Exception ex)
            {
                _logger.Error("Fehler bei Löschung eines Logs.", ex, _userHelper.FromCookies());

                return PartialView("~/Views/Shared/_PopupError.cshtml", ex);
            }
        }

        #endregion
    }
}