using System.Collections.Generic;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Messaging;
using CommunityToolkit.Mvvm.Messaging.Messages;
using Wino.Core.Domain.Interfaces;

namespace Wino.Mail.ViewModels
{
    public partial class ReadComposePanePageViewModel : MailBaseViewModel,
        IRecipient<PropertyChangedMessage<string>>,
        IRecipient<PropertyChangedMessage<int>>
    {
        private readonly IFontService _fontService;

        public IPreferencesService PreferencesService { get; set; }
        public List<string> AvailableFonts => _fontService.GetFonts();

        [ObservableProperty]
        [NotifyPropertyChangedRecipients]
        string currentReaderFont;

        [ObservableProperty]
        [NotifyPropertyChangedRecipients]
        int currentReaderFontSize;

        [ObservableProperty]
        [NotifyPropertyChangedRecipients]
        string currentComposerFont;

        [ObservableProperty]
        [NotifyPropertyChangedRecipients]
        int currentComposerFontSize;

        public ReadComposePanePageViewModel(IMailDialogService dialogService,
                                        IFontService fontService,
                                        IPreferencesService preferencesService) 
        {
            _fontService = fontService;
            PreferencesService = preferencesService;

            CurrentReaderFont = preferencesService.ReaderFont;
            CurrentReaderFontSize = preferencesService.ReaderFontSize;

            CurrentComposerFont = preferencesService.ComposerFont;
            CurrentComposerFontSize = preferencesService.ComposerFontSize;
        }

        public void Receive(PropertyChangedMessage<string> message)
        {
            if (message.PropertyName == nameof(CurrentReaderFont) && message.OldValue != message.NewValue)
            {
                PreferencesService.ReaderFont = message.NewValue;
            }

            if (message.PropertyName == nameof(CurrentComposerFont) && message.OldValue != message.NewValue)
            {
                PreferencesService.ComposerFont = message.NewValue;
            }
        }

        public void Receive(PropertyChangedMessage<int> message)
        {
            if (message.PropertyName == nameof(CurrentReaderFontSize))
            {
                PreferencesService.ReaderFontSize = CurrentReaderFontSize;
            }
            else if (message.PropertyName == nameof(CurrentComposerFontSize))
            {
                PreferencesService.ComposerFontSize = CurrentComposerFontSize;
            }
        }
    }
}
