using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
using CommunityToolkit.Mvvm.Messaging;
using Microsoft.Toolkit.Uwp.Notifications;
using Serilog;
using Windows.ApplicationModel;
using Windows.Data.Xml.Dom;
using Windows.UI.Notifications;
using Wino.Core.Domain.Entities.Calendar;
using Wino.Core.Domain;
using Wino.Core.Domain.Entities.Mail;
using Wino.Core.Domain.Entities.Shared;
using Wino.Core.Domain.Enums;
using Wino.Core.Domain.Interfaces;
using Wino.Messaging.UI;

namespace Wino.Mail.WinUI.Services;

public class NotificationBuilder : INotificationBuilder
{
    private const string MailApplicationId = "App";

    private readonly IAccountService _accountService;
    private readonly IFolderService _folderService;
    private readonly IMailService _mailService;
    private readonly IThumbnailService _thumbnailService;

    public NotificationBuilder(IAccountService accountService,
                               IFolderService folderService,
                               IMailService mailService,
                               IThumbnailService thumbnailService)
    {
        _accountService = accountService;
        _folderService = folderService;
        _mailService = mailService;
        _thumbnailService = thumbnailService;

        WeakReferenceMessenger.Default.Register<MailReadStatusChanged>(this, (r, msg) =>
        {
            RemoveNotification(msg.UniqueId);
        });
    }

    public async Task CreateNotificationsAsync(IEnumerable<MailCopy> downloadedMailItems)
    {
        try
        {
            // Filter mails to only include Inbox folder items
            var inboxMailItems = new List<MailCopy>();

            foreach (var item in downloadedMailItems)
            {
                var mailItem = await _mailService.GetSingleMailItemAsync(item.UniqueId);

                //if (mailItem == null || mailItem.AssignedFolder == null)
                //    continue;

                //// Only create notifications for Inbox folder mails
                //if (mailItem.AssignedFolder.SpecialFolderType != SpecialFolderType.Inbox)
                //    continue;

                //// Skip folders with synchronization disabled
                //if (!mailItem.AssignedFolder.IsSynchronizationEnabled)
                //    continue;

                //// Skip already read mails
                //if (mailItem.IsRead)
                //{
                //    RemoveNotification(mailItem.UniqueId);
                //    continue;
                //}

                inboxMailItems.Add(mailItem);
            }

            var mailCount = inboxMailItems.Count;

            if (mailCount == 0)
                return;

            // If there are more than 3 mails, just display 1 general toast.
            if (mailCount > 3)
            {
                var builder = new ToastContentBuilder();
                builder.SetToastScenario(ToastScenario.Default);

                builder.AddText(Translator.Notifications_MultipleNotificationsTitle);
                builder.AddText(string.Format(Translator.Notifications_MultipleNotificationsMessage, mailCount));
                builder.AddArgument(Constants.ToastModeKey, Constants.ToastModeMail);

                builder.AddButton(GetDismissButton());
                builder.AddAudio(new ToastAudio()
                {
                    Src = new Uri("ms-winsoundevent:Notification.Mail")
                });

                ShowToast(builder, ToastTargetApp.Mail);
            }
            else
            {
                foreach (var mailItem in inboxMailItems)
                {
                    await CreateSingleNotificationAsync(mailItem);
                }

                await UpdateTaskbarIconBadgeAsync();
            }
        }
        catch (Exception ex)
        {
            Log.Error(ex, "Failed to create notifications.");
        }
    }

    private async Task CreateSingleNotificationAsync(MailCopy mailItem)
    {
        var builder = new ToastContentBuilder();
        builder.SetToastScenario(ToastScenario.Default);

        var avatarThumbnail = await _thumbnailService.GetThumbnailAsync(mailItem.FromAddress, awaitLoad: true);
        if (!string.IsNullOrEmpty(avatarThumbnail))
        {
            var tempFile = await Windows.Storage.ApplicationData.Current.TemporaryFolder.CreateFileAsync($"{Guid.NewGuid()}.png", Windows.Storage.CreationCollisionOption.ReplaceExisting);
            await using (var stream = await tempFile.OpenStreamForWriteAsync())
            {
                var bytes = Convert.FromBase64String(avatarThumbnail);
                await stream.WriteAsync(bytes);
            }
            builder.AddAppLogoOverride(new Uri($"ms-appdata:///temp/{tempFile.Name}"), hintCrop: ToastGenericAppLogoCrop.Default);
        }

        // Override system notification timestamp with received date of the mail.
        builder.AddCustomTimeStamp(mailItem.CreationDate.ToLocalTime());

        builder.AddText(mailItem.FromName);
        builder.AddText(mailItem.Subject);
        builder.AddText(mailItem.PreviewText);

        builder.AddArgument(Constants.ToastMailUniqueIdKey, mailItem.UniqueId.ToString());
        builder.AddArgument(Constants.ToastActionKey, MailOperation.Navigate);
        builder.AddArgument(Constants.ToastModeKey, Constants.ToastModeMail);

        builder.AddButton(GetMarkAsReadButton(mailItem.UniqueId));
        builder.AddButton(GetDeleteButton(mailItem.UniqueId));
        builder.AddButton(GetArchiveButton(mailItem.UniqueId));
        builder.AddAudio(new ToastAudio()
        {
            Src = new Uri("ms-winsoundevent:Notification.Mail")
        });

        // Use UniqueId as tag to allow removal
        ShowToast(builder, ToastTargetApp.Mail, mailItem.UniqueId.ToString());
    }

    private ToastButton GetDismissButton()
        => new ToastButton()
        .SetDismissActivation()
        .SetImageUri(new Uri("ms-appx:///Assets/NotificationIcons/dismiss.png"));

    private static ToastButton GetArchiveButton(Guid mailUniqueId)
        => new ToastButton()
        .SetContent(Translator.MailOperation_Archive)
        .SetImageUri(new Uri("ms-appx:///Assets/NotificationIcons/archive.png"))
        .AddArgument(Constants.ToastMailUniqueIdKey, mailUniqueId.ToString())
        .AddArgument(Constants.ToastActionKey, MailOperation.Archive)
        .AddArgument(Constants.ToastModeKey, Constants.ToastModeMail)
        .SetBackgroundActivation();

    private ToastButton GetDeleteButton(Guid mailUniqueId)
        => new ToastButton()
        .SetContent(Translator.MailOperation_Delete)
        .SetImageUri(new Uri("ms-appx:///Assets/NotificationIcons/delete.png"))
        .AddArgument(Constants.ToastMailUniqueIdKey, mailUniqueId.ToString())
        .AddArgument(Constants.ToastActionKey, MailOperation.SoftDelete)
        .AddArgument(Constants.ToastModeKey, Constants.ToastModeMail)
        .SetBackgroundActivation();

    private static ToastButton GetMarkAsReadButton(Guid mailUniqueId)
        => new ToastButton()
        .SetContent(Translator.MailOperation_MarkAsRead)
        .SetImageUri(new System.Uri("ms-appx:///Assets/NotificationIcons/markread.png"))
        .AddArgument(Constants.ToastMailUniqueIdKey, mailUniqueId.ToString())
        .AddArgument(Constants.ToastActionKey, MailOperation.MarkAsRead)
        .AddArgument(Constants.ToastModeKey, Constants.ToastModeMail)
        .SetBackgroundActivation();

    public async Task UpdateTaskbarIconBadgeAsync()
    {
        int totalUnreadCount = 0;

        try
        {
            var badgeUpdater = BadgeUpdateManager.CreateBadgeUpdaterForApplication(MailApplicationId);
            var accounts = await _accountService.GetAccountsAsync();

            foreach (var account in accounts)
            {
                if (!account.Preferences.IsTaskbarBadgeEnabled) continue;

                var accountInbox = await _folderService.GetSpecialFolderByAccountIdAsync(account.Id, SpecialFolderType.Inbox);

                if (accountInbox == null)
                    continue;

                var inboxUnreadCount = await _folderService.GetFolderNotificationBadgeAsync(accountInbox.Id);

                totalUnreadCount += inboxUnreadCount;
            }

            if (totalUnreadCount > 0)
            {
                // Get the blank badge XML payload for a badge number
                XmlDocument badgeXml = BadgeUpdateManager.GetTemplateContent(BadgeTemplateType.BadgeNumber);

                // Set the value of the badge in the XML to our number
                XmlElement? badgeElement = badgeXml.SelectSingleNode("/badge") as XmlElement;
                if (badgeElement == null)
                {
                    badgeUpdater.Clear();
                    return;
                }
                badgeElement.SetAttribute("value", totalUnreadCount.ToString());

                // Create the badge notification
                BadgeNotification badge = new BadgeNotification(badgeXml);

                // And update the badge
                badgeUpdater.Update(badge);
            }
            else
                badgeUpdater.Clear();
        }
        catch (Exception ex)
        {
            Log.Error(ex, "Error while updating taskbar badge.");
        }
    }

    public void RemoveNotification(Guid mailUniqueId)
    {
        try
        {
            ToastNotificationManager.History.Remove(mailUniqueId.ToString(), null, GetAppUserModelId(ToastTargetApp.Mail));
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failed to remove notification for mail {mailUniqueId}");
        }
    }

    public void CreateAttentionRequiredNotification(MailAccount account)
    {
        var builder = new ToastContentBuilder();
        builder.SetToastScenario(ToastScenario.Default);

        builder.AddText(Translator.Exception_AccountNeedsAttention_Title);
        builder.AddText(string.Format(Translator.Exception_AccountNeedsAttention_Message, account.Name));

        builder.AddButton(GetDismissButton());

        builder.AddArgument(Constants.ToastMailAccountIdKey, account.Id.ToString());
        builder.AddArgument(Constants.ToastModeKey, Constants.ToastModeMail);
        builder.AddButton(new ToastButton().SetContent(Translator.Buttons_FixAccount));
        ShowToast(builder, ToastTargetApp.Mail);
    }

    public void CreateWebView2RuntimeMissingNotification()
    {
        var builder = new ToastContentBuilder();
        builder.SetToastScenario(ToastScenario.Default);

        builder.AddText(Translator.Exception_WebView2RuntimeMissing_Title);
        builder.AddText(Translator.Exception_WebView2RuntimeMissing_Message);

        builder.AddButton(GetDismissButton());
        builder.AddArgument(Constants.ToastModeKey, Constants.ToastModeMail);
        ShowToast(builder, ToastTargetApp.Mail);
    }

    public Task CreateCalendarReminderNotificationAsync(CalendarItem calendarItem, long reminderDurationInSeconds)
    {
        if (calendarItem == null)
            return Task.CompletedTask;

        var builder = new ToastContentBuilder();
        builder.SetToastScenario(ToastScenario.Reminder);

        var localStart = calendarItem.LocalStartDate;
        var reminderMinutes = (int)Math.Max(0, reminderDurationInSeconds / 60);
        var reminderContext = reminderMinutes > 0
            ? $"Starts in {reminderMinutes} minute{(reminderMinutes == 1 ? string.Empty : "s")}"
            : "Starting now";

        builder.AddText(calendarItem.Title);
        builder.AddText($"{reminderContext} - {localStart:g}");

        if (!string.IsNullOrWhiteSpace(calendarItem.Location))
            builder.AddText(calendarItem.Location);

        builder.AddArgument(Constants.ToastCalendarActionKey, Constants.ToastCalendarNavigateAction);
        builder.AddArgument(Constants.ToastCalendarItemIdKey, calendarItem.Id.ToString());
        builder.AddArgument(Constants.ToastModeKey, Constants.ToastModeCalendar);
        builder.AddButton(GetDismissButton());
        builder.AddAudio(new ToastAudio()
        {
            Src = new Uri("ms-winsoundevent:Notification.Reminder")
        });

        var tag = $"calendar-reminder-{calendarItem.Id:N}-{reminderDurationInSeconds}";
        ShowToast(builder, ToastTargetApp.Calendar, tag);

        return Task.CompletedTask;
    }

    private static void ShowToast(ToastContentBuilder builder, ToastTargetApp targetApp, string? tag = null)
    {
        var toastNotification = new ToastNotification(builder.GetToastContent().GetXml());

        if (!string.IsNullOrWhiteSpace(tag))
        {
            toastNotification.Tag = tag;
        }

        var appUserModelId = GetAppUserModelId(targetApp);
        var notifier = ToastNotificationManager.CreateToastNotifier(appUserModelId);
        notifier.Show(toastNotification);
    }

    private static string GetAppUserModelId(ToastTargetApp targetApp)
    {
        _ = targetApp;
        return $"{Package.Current.Id.FamilyName}!{MailApplicationId}";
    }

    private enum ToastTargetApp
    {
        Mail,
        Calendar
    }
}