MARKUS

using System;

using System.Collections.Generic;

using System.Text;

using WPFTemplate.Helpers;

namespace NetSparkleUpdater.UI.WPF.ViewModels

{

    public class DownloadProgressWindowViewModel : ChangeNotifier

    {

        private AppCastItem _itemToDownload;

        private bool _isDownloading;

        private bool _didDownloadAnything;

        private string _errorMessageText;

        private bool _isErrorMessageVisible;

        private string _downloadingTitle;

        private double _downloadProgressValue;

        private string _userReadableDownloadProgress;

        private string _actionButtonTitle;

        private bool _isActionButtonVisible;

        public DownloadProgressWindowViewModel()

        {

            IsDownloading = true;

            DidDownloadAnything = false;

            ErrorMessageText = "";

            IsErrorMessageVisible = false;

            _downloadingTitle = "";

            _downloadProgressValue = 0.0;

            IsActionButtonVisible = false;

        }

        public AppCastItem ItemToDownload

        {

            get => _itemToDownload;

            set 

            { 

                _itemToDownload = value;

                NotifyPropertyChanged();

                if (value != null)

                {

                    DownloadingTitle = string.Format("Downloading {0}", _itemToDownload.AppName + " " + _itemToDownload.Version);

                }

                else

                {

                    DownloadingTitle = "Downloading...";

                }

            }

        }

        public bool IsDownloading

        {

            get => _isDownloading;

            set { _isDownloading = value; NotifyPropertyChanged(); }

        }

        public bool DidDownloadAnything

        {

            get => _didDownloadAnything;

            set { _didDownloadAnything = value; NotifyPropertyChanged(); }

        }

        public string ErrorMessageText

        {

            get => _errorMessageText;

            set { _errorMessageText = value; NotifyPropertyChanged(); }

        }

        public bool IsErrorMessageVisible

        {

            get => _isErrorMessageVisible;

            set { _isErrorMessageVisible = value; NotifyPropertyChanged(); }

        }

        public string DownloadingTitle

        {

            get => _downloadingTitle;

            set { _downloadingTitle = value; NotifyPropertyChanged(); }

        }

        public double DownloadProgress

        {

            get => _downloadProgressValue;

            set { _downloadProgressValue = value; NotifyPropertyChanged(); }

        }

        public string UserReadableDownloadProgress

        {

            get => _userReadableDownloadProgress;

            set { _userReadableDownloadProgress = value; NotifyPropertyChanged(); }

        }

        public string ActionButtonTitle

        {

            get => _actionButtonTitle;

            set { _actionButtonTitle = value; NotifyPropertyChanged(); }

        }

        public bool IsActionButtonVisible

        {

            get => _isActionButtonVisible;

            set { _isActionButtonVisible = value; NotifyPropertyChanged(); }

        }

        public void SetFinishedDownloading(bool isInstallFileValid)

        {

            IsDownloading = false;

            DownloadProgress = 100;

            if (!_didDownloadAnything)

            {

                UserReadableDownloadProgress = string.Format("");

            }

            if (isInstallFileValid)

            {

                IsActionButtonVisible = true;

                ActionButtonTitle = "Install and Relaunch";

            }

            else

            {

                IsActionButtonVisible = false;

            }

        }

        public void UpdateProgress(long bytesReceived, long totalBytesToReceive, int percentage)

        {

            DidDownloadAnything = true;

            DownloadProgress = percentage;

            UserReadableDownloadProgress = string.Format("({0} / {1})",

                Utilities.ConvertNumBytesToUserReadableString(bytesReceived),

                Utilities.ConvertNumBytesToUserReadableString(totalBytesToReceive));

        }

    }

}