using Massmailer.Shared.Events;
using Massmailer.Shared.Logic;
using Massmailer.Shared.Model;
using Microsoft.Win32;
using PubSub;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;

namespace Massmailer.UI
{
    public partial class MainView : Window
    {
        private readonly Hub hub = new Hub();
        private SmtpSettings smtpSettings;
        private MassmailerProject project = new MassmailerProject();
        private string selectedFilePath = string.Empty;
        private bool isDirty = false;

        public MainView()
        {
            this.InitializeComponent();
            this.hub.Subscribe<MailSentEvent>(this.MailSentEventHandler);
        }

        private async void Window_Loaded(object sender, RoutedEventArgs e)
        {
            this.smtpSettings = await SmtpSettingsLogic.Load(Path.Combine(Environment.CurrentDirectory, Constants.SmtpSettingsFileName));
        }

        private void MailSentEventHandler(MailSentEvent mailSentEvent)
        {
            //this.BtnSend.Content = $"mail sent: {mailSentEvent.Recipient} at {mailSentEvent.Timestamp}";
        }

        private void MnuFileNew_Click(object sender, RoutedEventArgs e)
        {
            if (this.isDirty)
            {
                var result = MessageBox.Show("Aktuelle Änderungen speichern?", "Massmailer", MessageBoxButton.YesNoCancel);

                if (result == MessageBoxResult.Cancel)
                {
                    return;
                }

                if (result == MessageBoxResult.Yes)
                {
                    MassmailerProjectLogic.Save(this.project, this.GetSaveFilePath());
                }

                // TODO untested
                this.project = new MassmailerProject();
                this.DataContext = this.project;
                this.Title = "Massmailer";
            }
        }

        private async void MnuFileOpen_Click(object sender, RoutedEventArgs e)
        {
            if (this.isDirty)
            {
                var result = MessageBox.Show("Aktuelle Änderungen speichern?", "Massmailer", MessageBoxButton.YesNoCancel);

                if (result == MessageBoxResult.Cancel)
                {
                    return;
                }

                if (result == MessageBoxResult.Yes)
                {
                    MassmailerProjectLogic.Save(this.project, this.GetSaveFilePath(false));
                }
            }

            // TODO untested
            var openFileDialog = new OpenFileDialog();
            openFileDialog.DefaultExt = $".{Constants.ProjectFileExtension}";
            openFileDialog.Filter = $"Massmailer Projekte|*.{Constants.ProjectFileExtension}|Alle Dateien|*.*";

            if (openFileDialog.ShowDialog() == true)
            {
                this.project = await MassmailerProjectLogic.Load(openFileDialog.FileName);
                this.DataContext = this.project;
                this.selectedFilePath = openFileDialog.FileName;
                this.Title = $"Massmailer - {openFileDialog.FileName}";
            }
        }

        private void MnuFileSave_Click(object sender, RoutedEventArgs e)
        {
            MassmailerProjectLogic.Save(this.project, this.GetSaveFilePath(false));
        }

        private void MnuFileSaveAs_Click(object sender, RoutedEventArgs e)
        {
            MassmailerProjectLogic.Save(this.project, this.GetSaveFilePath(true));
        }

        private void MnuFileQuit_Click(object sender, RoutedEventArgs e)
        {
            if (this.isDirty)
            {
                var result = MessageBox.Show("Aktuelle Änderungen speichern?", "Massmailer", MessageBoxButton.YesNoCancel);

                if (result == MessageBoxResult.Cancel)
                {
                    return;
                }

                if (result == MessageBoxResult.Yes)
                {
                    MassmailerProjectLogic.Save(this.project, this.GetSaveFilePath(false));
                }
            }

            Application.Current.Shutdown();
        }

        private void MnuHelpAbout_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("todo");
        }

        private async void BtnSend_Click(object sender, RoutedEventArgs e)
        {
            var smtpSettings = new SmtpSettings
            {
                Server = "localhost",
                Port = 25,
                Username = "test@test.local",
                Password = "asdf33asdf",
                UseSsl = false,
                SenderEmail = "test@test.local",
                SenderName = "Massmailer Test",
                MaxSendRate = 60
            };
            var mailer = new Mailer(smtpSettings, this.hub);
            var recipients = new List<string>
            {
                "1@test.local",
                "2@test.local",
                "3@test.local",
                "4@test.local",
                "5@test.local",
                "6@test.local",
                "7@test.local",
                "8@test.local",
                "9@test.local",
                "10@test.local"
            };

            var project = new MassmailerProject();
            project.Recipients.Add(new MassmailerRecipient { Address = "1@test.local" });
            project.Recipients.Add(new MassmailerRecipient { Address = "2@test.local" });
            project.Recipients.Add(new MassmailerRecipient { Address = "3@test.local" });
            project.Recipients.Add(new MassmailerRecipient { Address = "4@test.local" });
            project.Recipients.Add(new MassmailerRecipient { Address = "5@test.local" });
            project.Recipients.Add(new MassmailerRecipient { Address = "6@test.local" });
            project.Recipients.Add(new MassmailerRecipient { Address = "7@test.local" });
            project.Recipients.Add(new MassmailerRecipient { Address = "8@test.local" });
            project.Recipients.Add(new MassmailerRecipient { Address = "9@test.local" });
            project.Recipients.Add(new MassmailerRecipient { Address = "10@test.local" });
            project.Subject = "Hello World Subject";
            project.Body = "Hello World Body";

            await mailer.SendMailsAsync(project);

            var result = "";
            foreach (var recipient in project.Recipients)
            {
                result += $"{recipient.Address} - {recipient.IsSent} - {recipient.SentDate}\r\n";
            }

            MassmailerProjectLogic.Save(project, "project.json");

            MessageBox.Show(result);
        }

        private string GetSaveFilePath(bool force)
        {
            if (string.IsNullOrEmpty(this.selectedFilePath) || force)
            {
                var savefileDialog = new SaveFileDialog();
                savefileDialog.DefaultExt = $".{Constants.ProjectFileExtension}";
                savefileDialog.Filter = $"Massmailer Projekte|*.{Constants.ProjectFileExtension}|Alle Dateien|*.*";
                if (savefileDialog.ShowDialog() == true)
                {
                    this.selectedFilePath = savefileDialog.FileName;
                }
            }

            return this.selectedFilePath;
        }
    }
}