using Microsoft.Win32;

using WPFluent.Gallery.ControlsLookup;
using WPFluent.Gallery.Models;
using WPFluent.Gallery.Views.Pages;

namespace WPFluent.Gallery.ViewModels.Pages;

public partial class OpSystemViewModel : ViewModel
{

    [ObservableProperty]
    private string _clipboardContent = "Click the button!";

    [ObservableProperty]
    private string _fileToSaveContents = string.Empty;

    [ObservableProperty]
    private string _fileToSaveName = string.Empty;
    [ObservableProperty]
    private ICollection<NavigationCard> _navigationCards = new ObservableCollection<NavigationCard>(
        ControlPages
            .FromNamespace(typeof(OpSystemPage).Namespace!)
            .Select(x => new NavigationCard()
            {
                Name = x.Name,
                Icon = x.Icon,
                Description = x.Description,
                PageType = x.PageType,
            })
    );

    [ObservableProperty]
    private string _openedFilePath = string.Empty;
    [ObservableProperty]
    private Visibility _openedFilePathVisibility = Visibility.Collapsed;

    [ObservableProperty]
    private string _openedFolderPath = string.Empty;

    [ObservableProperty]
    private Visibility _openedFolderPathVisibility = Visibility.Collapsed;

    [ObservableProperty]
    private string _openedMultiplePath = string.Empty;

    [ObservableProperty]
    private Visibility _openedMultiplePathVisibility = Visibility.Collapsed;

    [ObservableProperty]
    private string _openedPicturePath = string.Empty;

    [ObservableProperty]
    private Visibility _openedPicturePathVisibility = Visibility.Collapsed;

    [ObservableProperty]
    private string _savedFileNotice = string.Empty;

    [ObservableProperty]
    private Visibility _savedFileNoticeVisibility = Visibility.Collapsed;

    [ObservableProperty]
    private Visibility _textCopiedVisibility = Visibility.Collapsed;
    [ObservableProperty]
    private string _textToCopy = "This text will be copied to the clipboard.";

    [RelayCommand]
    private async Task OnCopyTextToClipboard()
    {
        try
        {
            Clipboard.Clear();
            Clipboard.SetText(TextToCopy);
        }
        catch (Exception e)
        {
            Debug.WriteLine(e);
        }

        if (TextCopiedVisibility == Visibility.Visible)
        {
            return;
        }

        TextCopiedVisibility = Visibility.Visible;

        await Task.Delay(5000);

        TextCopiedVisibility = Visibility.Collapsed;
    }

    [RelayCommand]
    private void OnParseTextFromClipboard()
    {
        try
        {
            ClipboardContent = Clipboard.GetText();
        }
        catch (Exception e)
        {
            Debug.WriteLine(e);
        }
    }

    [RelayCommand]
    public void OnOpenFile()
    {
        OpenedFilePathVisibility = Visibility.Collapsed;

        OpenFileDialog openFileDialog = new()
        {
            InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
            Filter = "All files (*.*)|*.*",
        };

        if (openFileDialog.ShowDialog() != true)
        {
            return;
        }

        if (!File.Exists(openFileDialog.FileName))
        {
            return;
        }

        OpenedFilePath = openFileDialog.FileName;
        OpenedFilePathVisibility = Visibility.Visible;
    }

    [RelayCommand]
    public void OnOpenFolder()
    {
#if NET8_0_OR_GREATER
        OpenedFolderPathVisibility = Visibility.Collapsed;

        OpenFolderDialog openFolderDialog = new()
        {
            Multiselect = true,
            InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
        };

        if (openFolderDialog.ShowDialog() != true)
        {
            return;
        }

        if (openFolderDialog.FolderNames.Length == 0)
        {
            return;
        }

        OpenedFolderPath = string.Join("\n", openFolderDialog.FolderNames);
        OpenedFolderPathVisibility = Visibility.Visible;
#else
        OpenedFolderPath = "OpenFolderDialog requires .NET 8 or newer";
        OpenedFolderPathVisibility = Visibility.Visible;
#endif
    }

    [RelayCommand]
    public void OnOpenMultiple()
    {
        OpenedMultiplePathVisibility = Visibility.Collapsed;

        OpenFileDialog openFileDialog = new()
        {
            Multiselect = true,
            InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
            Filter = "All files (*.*)|*.*",
        };

        if (openFileDialog.ShowDialog() != true)
        {
            return;
        }

        if (openFileDialog.FileNames.Length == 0)
        {
            return;
        }

        var fileNames = openFileDialog.FileNames;

        OpenedMultiplePath = string.Join("\n", fileNames);
        OpenedMultiplePathVisibility = Visibility.Visible;
    }

    [RelayCommand]
    public void OnOpenPicture()
    {
        OpenedPicturePathVisibility = Visibility.Collapsed;

        OpenFileDialog openFileDialog = new()
        {
            InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures),
            Filter = "Image files (*.bmp;*.jpg;*.jpeg;*.png)|*.bmp;*.jpg;*.jpeg;*.png|All files (*.*)|*.*",
        };

        if (openFileDialog.ShowDialog() != true)
        {
            return;
        }

        if (!File.Exists(openFileDialog.FileName))
        {
            return;
        }

        OpenedPicturePath = openFileDialog.FileName;
        OpenedPicturePathVisibility = Visibility.Visible;
    }

    [RelayCommand]
    public void OnSaveFile(CancellationToken cancellation)
    {
        SavedFileNoticeVisibility = Visibility.Collapsed;

        SaveFileDialog saveFileDialog = new()
        {
            Filter = "Text Files (*.txt)|*.txt",
            InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
        };

        if (!string.IsNullOrEmpty(FileToSaveName))
        {
            var invalidChars =
                new string(Path.GetInvalidFileNameChars()) + new string(Path.GetInvalidPathChars());

            saveFileDialog.FileName = string.Join(
                    "_",
                    FileToSaveName.Split(invalidChars.ToCharArray(), StringSplitOptions.RemoveEmptyEntries)
                )
                .Trim();
        }

        if (saveFileDialog.ShowDialog() != true)
        {
            return;
        }

        if (File.Exists(saveFileDialog.FileName))
        {
            // Protect the user from accidental writes
            return;
        }

        try
        {
            File.WriteAllText(saveFileDialog.FileName, FileToSaveContents);
        }
        catch (Exception e)
        {
            Debug.WriteLine(e);

            return;
        }

        SavedFileNoticeVisibility = Visibility.Visible;
        SavedFileNotice = $"File {saveFileDialog.FileName} was saved.";
    }
}