// Copyright (c) 2017- schick Informatik
// Description: Dialogbox zum Vergleichen zweier Excel via Named cells
//

using bsmd.database;
using System;
using System.Diagnostics;
using System.IO;
using System.Windows;

namespace ENI2.EditControls
{
    /// <summary>
    /// Interaction logic for CompareExcelDialog.xaml
    /// </summary>
    public partial class CompareExcelDialog : Controls.StatusWindowBase
    {

        #region Fields
        private string _sourcePath = null;
        private string _targetPath = null;
        #endregion

        public CompareExcelDialog()
        {
            InitializeComponent();
        }

        #region Drag&Drop event handler

        private void imageSource_Drop(object sender, DragEventArgs e)
        {
            string[] files = (string[]) e.Data.GetData(DataFormats.FileDrop);
            foreach (string file in files)
                Console.WriteLine(file);
            if(files.Length > 0)
            {
                if(File.Exists(files[0]))
                {
                    if(files[0].EndsWith("xls") || files[0].EndsWith("xlsx"))
                    {
                        _sourcePath = files[0];
                        textBoxSource.Text = _sourcePath;
                    }
                    else
                    {
                        textBoxSource.Text = null;
                        _sourcePath = null;
                    }
                } 
                else
                {
                    textBoxSource.Text = null;
                    _sourcePath = null;
                }
                EnableCompareButton();
            }
        }

        private void imageTarget_Drop(object sender, DragEventArgs e)
        {
            string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
            foreach (string file in files)
                Console.WriteLine(file);
            if (files.Length > 0)
            {
                if (File.Exists(files[0]))
                {
                    if (files[0].EndsWith("xls") || files[0].EndsWith("xlsx"))
                    {
                        _targetPath = files[0];
                        textBoxTarget.Text = _targetPath;
                    }
                    else
                    {
                        _targetPath = null;
                        textBoxTarget.Text = null;
                    }
                }
                else
                {
                    _targetPath = null;
                    textBoxTarget.Text = null;
                }
                EnableCompareButton();
            }
        }

        private void imageSource_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                e.Effects = DragDropEffects.Copy;
            }
        }

        private void textBoxSource_PreviewDragOver(object sender, DragEventArgs e)
        {
            e.Handled = true;
        }

        #endregion

        #region private methods

        private void EnableCompareButton()
        {
            this.buttonCompare.IsEnabled = (_targetPath != null) && (_sourcePath != null);
        }

        #endregion

        #region Comparison button handler logic

        private void buttonCompare_Click(object sender, RoutedEventArgs e)
        {
            Util.UIHelper.SetBusyState();
            string resultPath = Excel.ExcelComparer.Compare(_sourcePath, _targetPath, out string errorMessage);
            if(!errorMessage.IsNullOrEmpty()) {
                MessageBox.Show(errorMessage, "Comparison error", MessageBoxButton.OK, MessageBoxImage.Warning);
            }
            if(File.Exists(resultPath))
            {
                if(new FileInfo(resultPath).Length > 0)
                {
                    Process.Start(resultPath);
                }
            }

            // reset input values
            this.textBoxSource.Text = null;
            this.textBoxTarget.Text = null;
            this._sourcePath = null;
            this._targetPath = null;
            EnableCompareButton();

            this.Close();
        }

        #endregion

    }
}