using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.Mail;
using InABox.Wpf;
using InABox.WPF;
using NPOI.SS.Formula.Functions;
using PRS.Shared;
using PRSDesktop.Panels.Users;
using Syncfusion.Windows.Shared;

namespace PRSDesktop
{
    internal class UserGrid : DynamicDataGrid<User>
    {
        private bool ShowAll;

        public UserGrid()
        {
            AddButton("Show All", PRSDesktop.Resources.anonymous.AsBitmapImage(Color.White), ToggleDisabledUsers);

            ActionColumns.Add(new DynamicTickColumn<User, int>(x => x.Logins, null, PRSDesktop.Resources.tick.AsBitmapImage(), null, null));

            HiddenColumns.Add(x => x.AuthenticatorToken);
            HiddenColumns.Add(x => x.Logins);
            HiddenColumns.Add(x => x.Password);

            OnAfterSave += AfterSave;
            OnCustomiseEditor += UserGrid_OnCustomiseEditor;
            OnEditorValueChanged += UserGrid_OnEditorValueChanged;

            if (Security.IsAllowed<CanCreateMobilePhoneCredentialLinks>())
                ActionColumns.Add(new DynamicImageColumn(EmailImage, SendEmail));
        }
        protected override void DoReconfigure(FluentList<DynamicGridOption> options)
        {
            base.DoReconfigure(options);
            options.AddRange(DynamicGridOption.RecordCount, DynamicGridOption.FilterRows, DynamicGridOption.MultiSelect,
                DynamicGridOption.SelectColumns);
        }

        private class MobileLinkData : BaseObject
        {
            [TextBoxEditor]
            [EditorSequence(1)]
            public string ServerURLS { get; set; } = "";

            [TextBoxEditor]
            [EditorSequence(2)]
            public string From { get; set; } = "";

            [TextBoxEditor]
            [EditorSequence(3)]
            public string To { get; set; } = "";

            [IntegerEditor(ToolTip = "Enter link expiry time (mins)")]
            [EditorSequence(4)]
            public int ExpiryTime { get; set; } = 10;
        }

        private static readonly string IOSLink = @"prsmobile://open/";
        private static readonly string AndroidLink = @"http://www.prsmobile.com/open/";

        private bool SendEmail(CoreRow? row)
        {
            if (row is null) 
                return false;

            User user = row.ToObject<User>();

            var data = new MobileLinkData
            {
                ServerURLS = string.Join(';', App.DatabaseSettings.URLs),
                From = EmailUtils.GetAddressFromUserOrNull() ?? "",
                To = user.EmailAddress,
                ExpiryTime = 10
            };
            if (DynamicGridUtils.EditObject(data, customiseGrid: (grid) =>
            {
                grid.OnLoadEditorButtons += (item, buttons) =>
                {
                    buttons.Add("Scan for URL", null, null, (s, o) =>
                    {
                        Progress.Show("Looking for available Servers...");
                        var settings = DataBaseConfiguration.AutoDiscoverServer();
                        Progress.Close();
                        if(settings is not null && settings.Protocol == SerializerProtocol.RPC)
                        {
                            data.ServerURLS = string.Join(';', settings.URLs);
                            MessageWindow.ShowMessage("Server found.", "Success");
                        }
                        else
                        {
                            MessageWindow.ShowMessage("No RPC server found.", "Not found");
                        }
                    });
                };
            }))
            {
                CreateLink(user, data);
            }

            return false;
        }

        private static void CreateLink(User user, MobileLinkData data)
        {
            var URLs = CreateURLs(data.ServerURLS.Split(';'));
            var toEncrypt = URLs + "," + user.UserID + "," + user.Password + "," + DateTime.Now.AddMinutes(data.ExpiryTime);
            var encrypted = Encryption.Encrypt(toEncrypt, "logindetailslink", true);

            var emailcontent = $"Please ensure PRS Mobile is closed, then choose a link below:\n\n" +
                $"For Apple devices, click this link: {IOSLink}{encrypted}\n\n" +
                $"For Android devices (Samsung, Google, Xiaomi, Oppo, Vivo, Huawei, Motorola etc), click this link: {AndroidLink}{encrypted}\n\n" +
                $"Please restart the app after loading from the link.\n\nThese links will expire after {data.ExpiryTime} minutes.";

            var message = EmailUtils.CreateMessage(from: data.From, subject: "PRS Mobile Configuration Links", body: emailcontent, to: data.To);
            EmailUtils.OpenEmail(message);
        }

        private static string CreateURLs(string[] urls)
        {
            return string.Join("", urls.Select(x => $"{x},")) + "ENDURLS";
        }

        private BitmapImage? EmailImage(CoreRow? arg)
        {
            return PRSDesktop.Resources.email.AsBitmapImage();
        }

        private Dictionary<string, object?> UserGrid_OnEditorValueChanged(object sender, string name, object value)
        {
            var editorForm = (IDynamicEditorForm)sender;
            if (name == nameof(User.TwoFactorAuthenticationType))
            {
                var addressEditor = editorForm.FindEditor(nameof(User.Recipient2FA));
                var editor = editorForm.FindEditor(name) as LookupEditorControl;
                var choice = (TwoFactorAuthenticationType)value;
                var isGoogle = choice == TwoFactorAuthenticationType.GoogleAuthenticator;
                addressEditor.SetEnabled(!isGoogle);
                (editor.EditorDefinition as EnumLookupEditor)!.Buttons[0].SetEnabled(isGoogle);
            }
            return new();
        }

        private void UserGrid_OnCustomiseEditor(IDynamicEditorForm sender, User[]? items, DynamicGridColumn column, BaseEditor editor)
        {
            var user = items?.FirstOrDefault();
            if (user is null)
                return;

            if (column.ColumnName == nameof(User.TwoFactorAuthenticationType) && editor is EnumLookupEditor enumEditor)
            {
                var qrCodeButton = new EditorButton(user, "View QR Code", 100, ViewQRCode_Click, false);
                qrCodeButton.SetEnabled(user.TwoFactorAuthenticationType == TwoFactorAuthenticationType.GoogleAuthenticator);
                enumEditor.Buttons = new[] { qrCodeButton };
            }
            else if (column.ColumnName == nameof(User.Recipient2FA))
            {
                editor.Editable = user.TwoFactorAuthenticationType == TwoFactorAuthenticationType.GoogleAuthenticator ? Editable.Disabled : Editable.Enabled;
            }
        }

        private void ViewQRCode_Click(object editor, object? item)
        {
            if (item is User user && user.TwoFactorAuthenticationType == TwoFactorAuthenticationType.GoogleAuthenticator)
            {
                var qrWindow = new QR2FAWindow(user);
                qrWindow.ShowDialog();
            }
        }

        private bool ToggleDisabledUsers(Button btn, CoreRow[] rows)
        {
            ShowAll = !ShowAll;
            UpdateButton(btn, PRSDesktop.Resources.anonymous.AsBitmapImage(Color.White), ShowAll ? "Hide Finished" : "Show All");
            return true;
        }

        protected override void Reload(Filters<User> criteria, Columns<User> columns, ref SortOrder<User>? sort, Action<CoreTable?, Exception?> action)
        {
            if (!ShowAll)
                criteria.Add(new Filter<User>(x => x.Disabled).IsEqualTo(false));
            sort = new SortOrder<User>(x => x.UserID);
            base.Reload(criteria, columns, ref sort, action);
        }

        public override void SaveItem(User item)
        {
            base.SaveItem(item);
            if (item.ID == ClientFactory.UserGuid)
                Security.Reset();
        }

        private void AfterSave(IDynamicEditorForm editor, BaseObject[] items)
        {
            var users = items.Cast<User>().ToArray();
            var ids = users.Select(x => x.ID).ToArray();
            var linkedEmployees = new Client<Employee>().Query(
                new Filter<Employee>(x => x.UserLink.ID).InList(ids),
                new Columns<Employee>(x => x.UserLink.ID)
            ).Rows.Select(r => r.Get<Employee,Guid>(c=>c.UserLink.ID)).ToArray();

            var newEmployees = new List<Employee>();
            foreach (var user in users)
            {
                if (!linkedEmployees.Contains(user.ID))
                {
                    var result = MessageBox.Show($"{user.UserID} is not associated with an employee. Do you wish to create one?", "Create new Employee?", MessageBoxButton.YesNo);
                    if (result == MessageBoxResult.Yes)
                    {
                        var newEmployee = new Employee()
                        {
                            Name = user.Description
                        };
                        if(!string.IsNullOrWhiteSpace(user.EmailAddress))
                            newEmployee.Email = user.EmailAddress;
                        newEmployee.UserLink.ID = user.ID;
                        newEmployee.UserLink.Synchronise(user);

                        var grid = DynamicGridUtils.CreateDynamicGrid(typeof(DynamicDataGrid<>), typeof(Employee));
                        grid.EditItems(new object[] { newEmployee });
                    }
                }
            }
        }
    }
}