// Copyright (c) 2017- schick Informatik
// Description: Display dialog for customs XML data upload app
//

using bsmd.database.EasyPeasy;
using ENI2.Util;
using Microsoft.Office.Interop.Excel;
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;
using System.Xml;
using System.Xml.Serialization;

namespace ENI2.Controls
{
    /// <summary>
    /// Interaction logic for EasyPeasyControl.xaml
    /// </summary>
    public partial class EasyPeasyControl : UserControl
    {

        private ProofRequest _vm;

        public EasyPeasyControl()
        {
            InitializeComponent();
        }

        private void DataGrid_PreviewKeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.V && (Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
            {
                if (Clipboard.ContainsText())
                {
                    var text = Clipboard.GetText();
                    PasteGoodsItems(text);
                    e.Handled = true;
                }
            }
        }

        private void buttonClear_Click(object sender, RoutedEventArgs e)
        {
            this._vm = EasyPeasyState.CreateDefault();
            this.DataContext = this._vm;
        }

        private void buttonExport_Click(object sender, RoutedEventArgs e)
        {
            var dlg = new SaveFileDialog
            {
                FileName = "proofRequest.xml",
                Filter = "XML file|*.xml",
                OverwritePrompt = true
            };
            if (dlg.ShowDialog() == true)
            {
                try
                {
                    var ser = new XmlSerializer(typeof(ProofRequest));

                    // Namespaces (if needed)
                    // var ns = new XmlSerializerNamespaces();
                    // ns.Add("xsd", "http://www.w3.org/2001/XMLSchema");
                    // ns.Add("xsi", "http://www.w3.org/2001/XMLSchema-instance");

                    var settings = new XmlWriterSettings
                    {
                        Indent = true,
                        OmitXmlDeclaration = true
                    };

                    using (var fs = File.Create(dlg.FileName))
                    using (var xw = XmlWriter.Create(fs, settings))
                    {
                        ser.Serialize(xw, _vm); //, ns);
                    }

                    MessageBox.Show("Exported successfully.", "easy-peasy", MessageBoxButton.OK, MessageBoxImage.Information);
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Export failed:\n" + ex.Message, "easy-peasy", MessageBoxButton.OK, MessageBoxImage.Error);
                }
            }
        }

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            _vm = EasyPeasyState.LoadOrCreate();
            if (_vm.ProofInformationT2LT2LF == null)
                _vm.ProofInformationT2LT2LF = new ProofInformationT2LT2LF();
            if (_vm.ProofInformationT2LT2LF.GoodsShipmentForT2LT2LF == null)
                _vm.ProofInformationT2LT2LF.GoodsShipmentForT2LT2LF = new GoodsShipmentForT2LT2LF
                {
                    LocationOfGoods = new LocationOfGoods(),
                    TransportDocuments = new TransportDocuments()
                };
            this.DataContext = _vm;
        }

        private void UserControl_Unloaded(object sender, RoutedEventArgs e)
        {
            try
            {
                EasyPeasyState.Save(_vm);
            }
            catch { }
        }

        private void PasteGoodsItems(string text)
        {
            if (_vm?.ProofInformationT2LT2LF?.GoodsShipmentForT2LT2LF == null) return;

            var lines = text.Replace("\r\n", "\n").Replace('\r', '\n')
                            .Split(new[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);

            foreach (var line in lines)
            {
                // Split by tab first; if only one column, try CSV
                var cells = line.Split('\t');
                if (cells.Length == 1) cells = SplitCsv(line);

                // Expected order: HS, Item#, Description, Gross, Net, Pkgs, Type, Marks
                var item = new GoodsItemForT2LT2LF();

                if (cells.Length > 0) item.Commodity.HarmonizedSystemSubHeadingCode = cells[0].Trim();
                if (cells.Length > 1 && int.TryParse(cells[1], out var n)) item.GoodsItemNumber = n;
                if (cells.Length > 2) item.DescriptionOfGoods = cells[2].Trim();
                if (cells.Length > 3 && decimal.TryParse(cells[3], out var gross)) item.GoodsMeasure.GrossMass = gross;
                if (cells.Length > 4 && decimal.TryParse(cells[4], out var net)) item.GoodsMeasure.NetMass = net;
                if (cells.Length > 5 && int.TryParse(cells[5], out var pkgs)) item.Packaging.NumberOfPackages = pkgs;
                if (cells.Length > 6) item.Packaging.TypeOfPackages = cells[6].Trim();
                if (cells.Length > 7) item.Packaging.ShippingMarks = cells[7].Trim();

                _vm.ProofInformationT2LT2LF.GoodsShipmentForT2LT2LF.GoodsItemsForT2LT2LF.Add(item);
            }
        }

        // Very small CSV splitter (handles quotes)
        private static string[] SplitCsv(string line)
        {
            var res = new System.Collections.Generic.List<string>();
            var sb = new StringBuilder();
            bool inQuotes = false;
            for (int i = 0; i < line.Length; i++)
            {
                char c = line[i];
                if (c == '\"')
                {
                    if (inQuotes && i + 1 < line.Length && line[i + 1] == '\"')
                    { sb.Append('\"'); i++; }
                    else { inQuotes = !inQuotes; }
                }
                else if (c == ',' && !inQuotes)
                { res.Add(sb.ToString()); sb.Clear(); }
                else { sb.Append(c); }
            }
            res.Add(sb.ToString());
            return res.ToArray();
        }

        private void buttonImport_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "XML file|*.xml";
            ofd.RestoreDirectory = true;
            ofd.Multiselect = false;

            if (ofd.ShowDialog() == true)
            {
                using (var fs = File.OpenRead(ofd.FileName))
                {
                    var ser = new XmlSerializer(typeof(ProofRequest));
                    _vm = (ProofRequest)ser.Deserialize(fs);
                    this.DataContext = _vm;
                }
            }
        }
    }

}