using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Threading;
using InABox.Clients;
using InABox.Core;
using InABox.Mail;
using InABox.Wpf;
using InABox.WPF;
using Microsoft.Win32;

namespace PRSDesktop
{
    /// <summary>
    ///     Interaction logic for EmailForm.xaml
    /// </summary>
    public partial class EmailForm : ThemableWindow
    {
        private readonly ICoreMailMessage _message;
        private readonly DataModel _model;
        private readonly List<Tuple<string, byte[]>> attachments = new();

        public EmailForm(ICoreMailMessage message, DataModel model = null)
        {
            _message = message;
            _model = model;
            InitializeComponent();
            EmailImage.Source = PRSDesktop.Resources.email.AsBitmapImage(32, 32);

            Subject.Text = _message.Subject;
            Body.Text = _message.Body;
            To.Text = _message.To != null ? string.Join("; ", message.To) : "";
            Body.SetColor(Colors.LightYellow);

            if (_message.Attachments != null)
                attachments.AddRange(_message.Attachments);
            Attachments.ItemsSource = attachments;

            ApplyTemplate.Visibility = model != null ? Visibility.Visible : Visibility.Collapsed;

            var timer = new DispatcherTimer();
            timer.Interval = TimeSpan.FromMilliseconds(100);
            timer.Tick += (o, e) =>
            {
                var bEnabled = !string.IsNullOrWhiteSpace(To.Text) && !string.IsNullOrWhiteSpace(Subject.Text) &&
                               !string.IsNullOrWhiteSpace(Body.Text);
                if (bEnabled != Send.IsEnabled)
                    Send.IsEnabled = bEnabled;
            };
            timer.IsEnabled = true;
        }

        public double Zoom
        {
            get => Body.ZoomFactor;
            set => Body.ZoomFactor = value;
        }

        private void SendClick(object sender, RoutedEventArgs e)
        {
            _message.To = To.Text.Split(new[] { "; " }, StringSplitOptions.RemoveEmptyEntries);
            //_message.CC = CC.Text.Split(new String[] { "; " }, StringSplitOptions.RemoveEmptyEntries);
            //_message.BCC = BCC.Text.Split(new String[] { "; " }, StringSplitOptions.RemoveEmptyEntries);
            _message.Subject = Subject.Text;
            _message.Body = Body.Text;
            _message.Attachments = attachments.ToArray();
            DialogResult = true;
            Close();
        }

        private void AddAttachment_Click(object sender, RoutedEventArgs e)
        {
            var dlg = new OpenFileDialog();
            dlg.Title = "Select Attachment";
            dlg.Filter = "All Files (*.*)|*.*";
            if (dlg.ShowDialog() == true)
                attachments.Add(new Tuple<string, byte[]>(Path.GetFileName(dlg.FileName), File.ReadAllBytes(dlg.FileName)));
            Attachments.ItemsSource = null;
            Attachments.ItemsSource = attachments;
        }

        private void DeleteAttachment_Click(object sender, RoutedEventArgs e)
        {
            var attachment = Attachments.SelectedItem as Tuple<string, byte[]>;
            if (attachment != null)
            {
                attachments.Remove(attachment);
                Attachments.ItemsSource = null;
                Attachments.ItemsSource = attachments;
            }
        }


        private void ApplyTemplate_Click(object sender, RoutedEventArgs e)
        {
            var templates = new Client<DataModelTemplate>().Query(new Filter<DataModelTemplate>(x => x.Model).IsEqualTo(_model.Name));
            if (templates.Rows.Any())
            {
                var context = new ContextMenu();
                foreach (var row in templates.Rows)
                {
                    var menu = new MenuItem
                    {
                        Header = row.Get<DataModelTemplate, string>(x => x.Name),
                        Tag = row
                    };
                    menu.Click += (o, args) =>
                    {
                        var cur = ((MenuItem)o).Tag as CoreRow;
                        var data = cur.Get<DataModelTemplate, string>(x => x.Template);
                        try
                        {
                            Body.Text = DataModelUtils.ParseTemplate(_model, data);
                        }
                        catch (Exception err)
                        {
                            MessageBox.Show("Unable to Parse Template!\n\n" + err.Message);
                        }
                    };
                    context.Items.Add(menu);
                }

                context.Items.Add(new Separator());
                var item = new MenuItem
                {
                    Header = "Manage Templates",
                    Tag = null
                };
                item.Click += (o, args) =>
                {
                    var list = new DataModelTemplateForm(_model);
                    list.ShowDialog();
                };
                context.Items.Add(item);
                context.PlacementTarget = ApplyTemplate;
                context.IsOpen = true;
            }
            else
            {
                var list = new DataModelTemplateForm(_model);
                list.ShowDialog();
            }
        }
    }
}