using System;
using System.Collections.Generic;

using Avalonia;
using Avalonia.Controls;
using Avalonia.Input;
using Avalonia.Interactivity;
using Avalonia.Markup.Xaml;

namespace ControlCatalog.Pages
{
    public partial class ClipboardPage : UserControl
    {
        public ClipboardPage()
        {
            InitializeComponent();
        }

        private TextBox ClipboardContent => this.Get<TextBox>("ClipboardContent");

        private void InitializeComponent()
        {
            AvaloniaXamlLoader.Load(this);
        }

        private async void CopyText(object? sender, RoutedEventArgs args)
        {
            if (Application.Current!.Clipboard is { } clipboard && ClipboardContent is { } clipboardContent)
                await clipboard.SetTextAsync(clipboardContent.Text ?? String.Empty);
        }

        private async void PasteText(object? sender, RoutedEventArgs args)
        {
            if(Application.Current!.Clipboard is { } clipboard)
            {
                ClipboardContent.Text = await clipboard.GetTextAsync();
            }
        }

        private async void CopyTextDataObject(object? sender, RoutedEventArgs args)
        {
            if (Application.Current!.Clipboard is { } clipboard)
            {
                var dataObject = new DataObject();
                dataObject.Set(DataFormats.Text, ClipboardContent.Text ?? string.Empty);
                await clipboard.SetDataObjectAsync(dataObject);
            }
        }

        private async void PasteTextDataObject(object? sender, RoutedEventArgs args)
        {
            if (Application.Current!.Clipboard is { } clipboard)
            {
                ClipboardContent.Text = await clipboard.GetDataAsync(DataFormats.Text) as string ?? string.Empty;
            }
        }

        private async void CopyFilesDataObject(object? sender, RoutedEventArgs args)
        {
            if (Application.Current!.Clipboard is { } clipboard)
            {
                var files = (ClipboardContent.Text ?? String.Empty)
                .Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
                if (files.Length == 0)
                {
                    return;
                }
                var dataObject = new DataObject();
                dataObject.Set(DataFormats.FileNames, files);
                await clipboard.SetDataObjectAsync(dataObject);
            }
        }

        private async void PasteFilesDataObject(object? sender, RoutedEventArgs args)
        {
            if (Application.Current!.Clipboard is { } clipboard)
            {
                var fiels = await clipboard.GetDataAsync(DataFormats.FileNames) as IEnumerable<string>;
                ClipboardContent.Text = fiels != null ? string.Join(Environment.NewLine, fiels) : string.Empty;
            }
        }

        private async void GetFormats(object sender, RoutedEventArgs args)
        {
            if (Application.Current!.Clipboard is { } clipboard)
            {
                var formats = await clipboard.GetFormatsAsync();
                ClipboardContent.Text = string.Join(Environment.NewLine, formats);
            }
        }

        private async void Clear(object sender, RoutedEventArgs args)
        {
            if (Application.Current!.Clipboard is { } clipboard)
            {
                await clipboard.ClearAsync();
            }
                
        }
    }
}