using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace ImageLoader
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private List<string> _imageList;
        private List<Image> _imageControlList;

        public MainWindow()
        {
            InitializeComponent();
            InitInstance();
        }

        private void InitInstance()
        {
            _imageList = new List<string>();
            _imageControlList = new List<Image>();
        }

        private void btnFolder_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog dlg = new OpenFileDialog();
            if (dlg.ShowDialog() == true)
            {
                string fullPath = dlg.FileName;
                string fileName = dlg.SafeFileName;
                string path = fullPath.Replace(fileName, "");

                txtFolder.Text = path;
                string[] files = Directory.GetFiles(path);
                _imageList = files.Where(f => f.IndexOf(".jpg", StringComparison.OrdinalIgnoreCase) >= 0
                                           || f.IndexOf(".png", StringComparison.OrdinalIgnoreCase) >= 0)
                    .ToList();
            }

            CreateImage(_imageList);
        }

        private void CreateImage(List<string> imageList)
        {
            for (int i = 0; i < imageList.Count; i++)
            {
                Image image = CreateBitmap(imageList[i]);
                _imageControlList.Add(image);

                image.MouseDown += Image_MouseDown;
                pnlImage.Children.Add(image);
            }
        }

        private void Image_MouseDown(object sender, MouseButtonEventArgs e)
        {
            Image image = sender as Image;
            if (image == null)
                return;

            //WrapPanel parent = image.Parent as WrapPanel;
            //if (parent != null)
            //    parent.Children.Clear();

            Image newImage = CreateBitmap(image.Source.ToString(), 1000);
            newImage.Stretch = Stretch.UniformToFill;
            cvsImage.Children.Clear();
            cvsImage.Children.Add(newImage);

            //CreateImage(_imageList);
        }

        private Image CreateBitmap(string path, int widthPixel = 300)
        {
            BitmapImage bitmap = new BitmapImage();
            bitmap.BeginInit();
            bitmap.CacheOption = BitmapCacheOption.OnDemand;
            bitmap.CreateOptions = BitmapCreateOptions.DelayCreation;
            bitmap.DecodePixelWidth = widthPixel;
            bitmap.UriSource = new Uri(path);
            bitmap.EndInit();

            Image img = new Image();
            img.Source = bitmap;
            return img;
        }
    }
}