using DevExpress.Utils;
using DevExpress.Web;
using DevExpress.Web.ASPxThemes;
using DevExpress.Web.Mvc;
using DevExpress.XtraPrinting;
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.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;

        public MiscController(
            IMiscService miscService,
            IUserService userService,
            INotificationService notificationService,
            INotificationScheduler notificationScheduler)
        {
            _miscService = miscService;
            _userService = userService;
            _notificationService = notificationService;
            _notificationScheduler = notificationScheduler;

            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)
        {
            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.Insert(0, "0 ");

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

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

                mailNotification.SetUsers(selectedUsers);

                _miscService.InsertMailNotification(mailNotification);
            }
            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);
            }

            _notificationScheduler.Start();

            return new JsonResult
            {
                Data = "success"
            };
        }

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

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

            return new JsonResult
            {
                Data = "success"
            };
        }

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

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

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

            return new JsonResult
            {
                Data = "success"
            };
        }

        #endregion
    }
}