/*
* Copyright 2012 ZXing.Net authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

using System;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;

using Microsoft.Win32;
using ZXing;

using BarcodeReader = ZXing.Presentation.BarcodeReader;
using BarcodeWriter = ZXing.Presentation.BarcodeWriter;
using BarcodeWriterGeometry = ZXing.Presentation.BarcodeWriterGeometry;

namespace WPFDemo
{
    /// <summary>
    /// Interaktionslogik für MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private readonly BarcodeReader reader = new BarcodeReader();

        public MainWindow()
        {
            InitializeComponent();

            foreach (var format in MultiFormatWriter.SupportedWriters)
                cmbEncoderType.Items.Add(format);
            cmbEncoderType.SelectedItem = BarcodeFormat.QR_CODE;

            cmbRendererType.Items.Add("WriteableBitmap");
            cmbRendererType.Items.Add("XAML Geometry");
            cmbRendererType.SelectedItem = "WriteableBitmap";
        }

        private void btnSelectFile_Click(object sender, RoutedEventArgs e)
        {
            var dlg = new OpenFileDialog
            {
                Filter = "All documents (*.*)|*.*",
                FileName = txtBarcodeImageFile.Text
            };
            if (dlg.ShowDialog(this).GetValueOrDefault(false))
            {
                txtBarcodeImageFile.Text = dlg.FileName;
            }
        }

        private void btnDecode_Click(object sender, RoutedEventArgs e)
        {
            var start = DateTime.Now;
            var result = reader.Decode((BitmapSource)imageBarcode.Source);
            labDuration.Content = (DateTime.Now - start).Milliseconds + " ms";
            if (result != null)
            {
                txtBarcodeType.Text = result.BarcodeFormat.ToString();
                txtBarcodeContent.Text = result.Text;
            }
            else
            {
                txtBarcodeType.Text = "";
                txtBarcodeContent.Text = "No barcode found.";
            }
        }

        private void txtBarcodeImageFile_TextChanged(object sender, TextChangedEventArgs e)
        {
            if (File.Exists(txtBarcodeImageFile.Text))
            {
                imageBarcode.Source = new BitmapImage(new Uri(txtBarcodeImageFile.Text));
            }
        }

        private void btnEncode_Click(object sender, RoutedEventArgs e)
        {
            imageBarcodeEncoder.Visibility = Visibility.Hidden;
            imageBarcodeEncoderGeometry.Visibility = Visibility.Hidden;

            switch (cmbRendererType.SelectedItem.ToString())
            {
                case "WriteableBitmap":
                    {
                        var writer = new BarcodeWriter
                        {
                            Format = (BarcodeFormat)cmbEncoderType.SelectedItem,
                            Options = new ZXing.Common.EncodingOptions
                            {
                                Height = (int)((FrameworkElement)imageBarcodeEncoder.Parent).ActualHeight,
                                Width = (int)((FrameworkElement)imageBarcodeEncoder.Parent).ActualWidth,
                                Margin = 0
                            }
                        };
                        var image = writer.Write(txtBarcodeContentEncode.Text);
                        imageBarcodeEncoder.Source = image;
                        imageBarcodeEncoder.Visibility = Visibility.Visible;
                    }
                    break;
                case "XAML Geometry":
                    {
                        var writer = new BarcodeWriterGeometry
                        {
                            Format = (BarcodeFormat)cmbEncoderType.SelectedItem,
                            Options = new ZXing.Common.EncodingOptions
                            {
                                Height = (int)((FrameworkElement)imageBarcodeEncoder.Parent).ActualHeight,
                                Width = (int)((FrameworkElement)imageBarcodeEncoder.Parent).ActualWidth,
                                Margin = 0
                            }
                        };
                        var image = writer.Write(txtBarcodeContentEncode.Text);
                        imageBarcodeEncoderGeometry.Data = image;
                        imageBarcodeEncoderGeometry.Visibility = Visibility.Visible;
                    }
                    break;
            }
        }
    }
}