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 PRSDesktop.Panels.Users;
using Syncfusion.Windows.Shared;

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

        public UserGrid()
        {
            Options.AddRange(DynamicGridOption.RecordCount, DynamicGridOption.FilterRows, DynamicGridOption.MultiSelect,
                DynamicGridOption.SelectColumns);
            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 DynamicActionColumn(EmailImage, SendEmail));
        }

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

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

            string ioslink = @"prsmobile://open/";
            string androidlink = @"http://www.prsmobile.com/open/";

            string toEncrypt = App.DatabaseSettings.URL + "," + App.DatabaseSettings.Port + "," + user.UserID + "," + user.Password + "," + DateTime.Now.AddMinutes(5);
            string encrypted = Encryption.Encrypt(toEncrypt, "logindetailslink", true);

            ioslink = ioslink + encrypted;
            androidlink = androidlink + encrypted;

            string emailcontent = "Please ensure PRS Mobile is closed, then choose a link below:" + Environment.NewLine + Environment.NewLine +
                "For Apple devices, click this link: " + ioslink + Environment.NewLine + Environment.NewLine
                + "For Android devices (Samsung, Google, Xiaomi, Oppo, Vivo, Huawei, Motorola etc), click this link: " + androidlink + Environment.NewLine + Environment.NewLine +
                "Please restart the app after loading from the link." + Environment.NewLine + Environment.NewLine +
                "These links will expire after 10 minutes";

            Clipboard.SetText(emailcontent);

            if (string.IsNullOrWhiteSpace(user.EmailAddress))
            {
                MessageBox.Show("User email is blank - please populate email address or send the text copied to your clipboard");
                return false;
            }

            var currentuser = new Client<User>()
                .Query(new Filter<User>(x => x.ID).IsEqualTo(ClientFactory.UserGuid))
                .Rows.FirstOrDefault()?.ToObject<User>();
            if (currentuser is null)
                return false;

            var result = MessageBox.Show("Send email with user credentials to " + user.EmailAddress + " ?", "Alert", MessageBoxButton.YesNo);
            switch (result)
            {
                case MessageBoxResult.Yes:
                    break;
                case MessageBoxResult.No:
                    return false;
                default:
                    return false;
            }

            bool currentUserEmailDetailsOK = !string.IsNullOrWhiteSpace(currentuser.EmailHost) && currentuser.EmailPort != 0
                && !string.IsNullOrWhiteSpace(currentuser.EmailAddress) && !string.IsNullOrWhiteSpace(currentuser.EmailPassword);

            var mailer = new ExchangeMailer
            {
                MailboxHost = currentuser.EmailHost,
                MailboxPort = currentuser.EmailPort,
                MailboxUserName = currentuser.EmailAddress,
                MailboxPassword = currentuser.EmailPassword
            };
            if (mailer.Connect())
            {
                var msg = mailer.CreateMessage();
                msg.To = new string[] { user.EmailAddress };
                msg.Subject = "Link to PRS Mobile";
                msg.Body = emailcontent;
                var bOK = mailer.SendMessage(msg);

                if (!currentUserEmailDetailsOK)
                    MessageBox.Show("Unable to send email - Email host, port, address or password missing for current user. Please update. The link has been copied to your clipboard for sending");

                else if (bOK)
                    MessageBox.Show("Link has been sent to email service. The link has been copied to your clipboard in case it is not received by the user");
            }

            return true;
        }

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

        private Dictionary<string, object?> UserGrid_OnEditorValueChanged(object sender, string name, object value)
        {
            var editorForm = (DynamicEditorForm)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);
        }

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

        private void AfterSave(DynamicEditorForm editor, User[] items)
        {
            var ids = items.Select(x => x.ID).ToArray();
            var linkedUsers = new Client<Employee>().Query(
                new Filter<Employee>(x => x.UserID).InList(ids),
                new Columns<Employee>(x => x.UserID)).Rows.Select(x => (Guid)x["UserID"]).ToArray();

            var newEmployees = new List<Employee>();
            foreach (var item in items)
            {
                if (!linkedUsers.Contains(item.ID))
                {
                    var result = MessageBox.Show($"{item.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 = item.Description
                        };
                        newEmployee.UserLink.ID = item.ID;
                        newEmployee.UserLink.Synchronise(item);

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